JP2022186817A - Processed product of laminate paper, laminate paper producing device, heat seal roller for laminate paper producing device, and laminate paper producing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a product that has high-value-added functions and achieves drastic improvement in performance, a laminate paper producing device, and a laminate paper producing method.

SOLUTION: A paper hand-towel comprises laminate paper. The laminate paper includes a pair of crepe sheets as outer layer sheets, and a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe sheets. The crepe sheet is heat-sealed to the intermediate layer sheet by heat-sealing means, to form linear heat-sealable part rows extending in a direction orthogonal to the direction in which crepe wrinkles of the crepe sheet extend, thereby heat-sealing the crepe sheet to the intermediate layer sheet, resulting in a laminate structure.

SELECTED DRAWING: Figure 16

COPYRIGHT: (C)2023,JPO&INPIT

Description

Applied for application of Article 30, Paragraph 2 of the Patent Law Date of publication of website: November 1, 2015 Website address: http://www. clear. co. jp/#! sakura/c1xmz http://www. clear. co. jp/#! sakura-eng/cb6k

TECHNICAL FIELD The present invention relates to a product obtained by processing laminated paper, a laminated paper manufacturing apparatus, a heat seal roller of the laminated paper manufacturing apparatus, and a method for manufacturing laminated paper.

As inventions related to laminated paper that can be used for conventional wet paper towels, there are inventions according to Patent Document 1 and Patent Document 2, which are inventions or ideas of the present inventors. In these inventions, a hygroscopic paper having a crepe and a heat-fusible sheet (hygroscopic paper or non-woven fabric mixed with synthetic fibers) are laminated, and the heat setting part or the heat is applied so as to extend in a direction substantially perpendicular to the crepe of the hygroscopic paper. A seal portion is formed and heat-sealed to integrate them. These inventions can provide a laminated paper that is comfortable to the touch, has an excellent appearance and a feeling of use, and can heat-seal the laminated paper at a low temperature, which facilitates processing and reduces manufacturing costs. can be reduced.

In addition, as inventions of the present inventors that further improve the conventional laminated paper having the above-mentioned excellent effects, there are the inventions described in Patent Document 3 and Patent Document 4. These inventions, in particular, greatly improve the fusion strength of the heat-sealed portions of the crepe paper and the heat-fusible sheet, and provide a laminated paper by increasing the overall volume feeling and further improving the appearance. be able to. That is, the laminated paper according to these inventions can obtain a sufficient fusion bond strength even if the fusion bond area is reduced, and can also increase the overall voluminous feel.

Japanese Patent Publication No. 4-24480 Japanese Utility Model Publication No. 4-15116 JP-A-11-342090 JP-A-2003-39581

In any of the inventions of Patent Documents 1 to 4, when the laminated paper is embodied in a paper towel or the like, the texture, appearance, and feeling of use can be greatly improved, and the laminated paper is constructed. The strength of the bond between the hygroscopic paper and the heat-fusible sheet can be greatly improved, and the volume of the entire product can be greatly increased. It brings great advantages as On the other hand, the inventor of the present invention imparts higher value-added functions to conventional laminated paper in the process of processing laminated paper as a material into final products such as wet paper towels, or at the stage after processing. In addition, we searched for a new laminated paper that can dramatically improve the performance as a laminated paper and a method for producing the same. Then, the present inventor has developed a laminated paper having such a high value-added function and dramatically improved performance compared to the conventional ones, a manufacturing method for producing the laminated paper, and the laminated paper. As a result of continuous research and development of a manufacturing apparatus for manufacturing or a manufacturing apparatus used in the manufacturing method and repeated trial and error, the present invention was achieved.

That is, the present invention provides a product obtained by processing laminated paper having a high value-added function and dramatically improved performance compared to conventional products, an apparatus for producing such laminated paper, and a heat device for producing such laminated paper. An object of the present invention is to provide a sealing roller and a method for manufacturing such laminated paper.

In the product obtained by processing the laminated paper according to the first aspect of the present invention, the laminated paper includes crepe paper as a pair of outer layer sheets, and heat and a nonwoven fabric as a fusible intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, the crepe rate of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion interval in the width direction of the heat-sealed portion row is in the range of 10 mm to 25 mm. set within. Further, in the laminated paper, the distance between the heat-sealed portions in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the distance between the heat-sealed portions in the width direction.

In the product obtained by processing the laminated paper according to the second aspect of the present invention, the laminated paper comprises a pair of crepe papers as outer layer sheets, and a heat roller disposed between the pair of crepe papers in a laminated state. and a nonwoven fabric as a fusible intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, when the crepe rate of the crepe paper is within the range of 20% to 26%, the widthwise distance between the heat-sealed portions of the heat-sealed portion row is set within the range of 10 mm to 15 mm. When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set in the range of 15 to 25 mm. Further, in the laminated paper, the distance between the heat-sealed portions in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the distance between the heat-sealed portions in the width direction.

In the laminated paper manufacturing apparatus according to the third aspect of the present invention, the laminated paper includes a pair of crepe papers as outer layer sheets, and a heat-fusible sheet disposed between the pair of crepe papers in a laminated state. and a nonwoven fabric as an intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, when the crepe rate of the crepe paper is within the range of 20% to 26%, the widthwise distance between the heat-sealed portions of the heat-sealed portion row is set within the range of 10 mm to 15 mm. When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm, and the width direction Within the range of the distance between the heat-sealed parts, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper. The laminated paper manufacturing apparatus includes a pair of first and second heat seal rollers for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller.

In the heat seal roller of the laminated paper manufacturing apparatus according to the fourth aspect of the present invention, the laminated paper is arranged in a laminated state between a pair of crepe papers as outer layer sheets and the pair of crepe papers. Nonwoven fabric as a heat-sealable intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, the crepe rate of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion interval in the width direction of the heat-sealed portion row is set in the range of 10 mm to 25 mm. Within the range of the widthwise distance between the heat-sealed parts, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper. The heat seal rollers of the laminated paper manufacturing apparatus are provided with first and second heat seal rollers forming a pair for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller.

In the heat seal roller of the laminated paper manufacturing apparatus according to the fifth aspect of the present invention, the laminated paper is arranged in a laminated state between a pair of crepe papers as outer layer sheets and the pair of crepe papers. Nonwoven fabric as a heat-sealable intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, when the crepe rate of the crepe paper is within the range of 20% to 26%, the widthwise distance between the heat-sealed portions of the heat-sealed portion row is set within the range of 10 mm to 15 mm. When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm, and the width direction Within the range of the distance between the heat-sealed parts, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper. The heat-sealing rollers of the laminated paper manufacturing apparatus are provided with first and second heat-sealing rollers forming a pair for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller.

The heat-sealing roller of the laminated paper manufacturing apparatus according to the sixth aspect of the present invention comprises a first heat-sealing roller and a second heat-sealing roller paired for forming the row of heat-sealed portions. there is The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger by a certain dimension than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller, and When the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat-sealing roller and the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat-sealing roller are arranged facing each other in a substantially close contact state, the first heat-sealing roller On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat seal roller, the constant width portions at both widthwise end portions of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller are exposed. It's becoming On both sides in the width direction of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller, a pair of side surfaces extend obliquely at a predetermined obtuse angle with respect to the thermocompression bonding surface.

A laminated paper manufacturing apparatus according to a seventh aspect of the present invention includes crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Further, in the laminated paper manufacturing apparatus, the roller lengths of the first heat-sealing roller and the second heat-sealing roller are set within a range of 1200 mm to 1500 mm. Roller diameters of the first heat-sealing roller and the second heat-sealing roller are set within a range of 180 mm to 300 mm. The pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, can be freely set to a value of 2 atmospheres or more.

An apparatus for producing laminated paper according to an eighth aspect of the present invention comprises crepe paper as a pair of outer layer sheets, and heat-sealable intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Further, in the laminated paper manufacturing apparatus, the pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, is set by the first heat seal roller and the first heat seal roller. When the roller length of the heat seal roller of No. 2 is 1400 mm, it can be freely set within the range of 5.5 to 7.0 atmospheres, and when the roller length of the first heat seal roller and the second heat seal roller is 1500 mm , 7.5 to 8.0 atm.

A laminated paper manufacturing apparatus according to a ninth aspect of the present invention comprises crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the seal roller. Furthermore, in the laminated paper manufacturing apparatus, the thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, can be freely set within a range of 175 to 200°C. there is temperature control of the first heat-seal roller and the second heat-seal roller so that the thermocompression bonding temperature increases or decreases in proportion to the rotation speed of the first heat-seal roller and the second heat-seal roller; Rotation can be freely controlled.

A laminated paper manufacturing apparatus according to a tenth aspect of the present invention comprises crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Furthermore, the laminated paper manufacturing apparatus maintains a constant thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, and The first heat-sealing roller and the second heat-sealing roller are arranged in accordance with the thickness of the base paper so that the rotation speed of the second heat-sealing roller increases or decreases in proportion to the thickness of the base paper, which is the thickness of the laminated paper before heat-sealing. Rotation can be freely controlled by increasing or decreasing the rotational speed of the motor.

An apparatus for manufacturing laminated paper according to an eleventh aspect of the present invention includes crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Furthermore, the laminated paper manufacturing apparatus maintains a constant thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, and The first heat-sealing roller and the second heat-sealing roller increase or decrease in proportion to the thickness of the non-woven fabric, which is the thickness of the non-woven fabric raw material sheet of the laminated paper before heat-sealing, so that the rotation speed of the second heat-sealing roller increases or decreases in proportion to the thickness of the non-woven fabric. It is possible to freely control the rotation by increasing or decreasing the rotation speed of the heat seal roller.

A laminated paper manufacturing apparatus according to a twelfth aspect of the present invention includes crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Further, the laminated paper manufacturing apparatus maintains constant rotational speeds of the first heat-sealing roller and the second heat-sealing roller, and heats the first heat-sealing roller and the second heat-sealing roller. The first heat seal roller and the second heat seal roller are arranged in accordance with the thickness of the nonwoven fabric so that the thermocompression temperature, which is the temperature at the time of pressure bonding, increases or decreases in proportion to the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat fusion. The temperature can be freely controlled by increasing or decreasing the thermocompression bonding temperature of the heat seal roller.

A laminated paper manufacturing apparatus according to a thirteenth aspect of the present invention includes crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Furthermore, sealed spaces are formed inside the first heat-seal roller and the second heat-seal roller, respectively, and the internal spaces of the first heat-seal roller and the second heat-seal roller are: It is a closed space maintained in a vacuum state. In the laminated paper manufacturing apparatus, external water supply means is connected to the inner spaces of the first heat seal roller and the second heat seal roller, respectively, and the water supply means supplies water to the first heat seal roller. and second heat-sealing rollers, respectively, while supplying moisture to the interior spaces of the first heat-sealing roller and the second heat-sealing roller, and supplying high-temperature steam obtained by heating the moisture when heating the first heat-sealing roller and the second heat-sealing roller. It is attached to the inner surface of the first heat-seal roller and the second heat-seal roller so as to form a thin layer or film, and the first heat-seal roller and the second heat-seal are formed by the layer-like or film-like water vapor. The entire roller is maintained at a uniform temperature over the entire circumferential direction and the entire length direction of the first heat-sealing roller and the second heat-sealing roller, and the thermocompression-bonding surfaces of all the thermocompression-bonding protrusions are The thermocompression bonding temperature, which is the temperature at the time of thermocompression bonding of the first and second heat seal rollers, can be freely controlled to be maintained uniformly over the entire surface.

According to the laminated paper, laminated paper manufacturing method, and laminated paper manufacturing apparatus of the present invention, it is possible to provide laminated paper having high value-added functions and dramatically improved performance compared to conventional ones. can.

FIG. 1 is a plan view showing a first specific example (laminated paper having a pattern portion) of laminated paper (laminated paper having a printing portion) according to Embodiment 1 of the present invention. FIG. 2 is an enlarged plan view showing the laminated paper according to Embodiment 1 of the present invention taken along line AA in FIG. 1, and (a) shows drying of laminated paper according to Embodiment 1. (b) shows the swollen state of the laminated paper according to Embodiment 1 when it contains water. FIG. 3 is a plan view showing a second specific example of laminated paper (laminated paper having an advertising section) according to Embodiment 1 of the present invention. FIG. 4 is a side view showing laminated paper according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view of the laminated paper according to Embodiment 1 of the present invention cut in the horizontal direction, showing an enlarged portion of the printed layer provided within the circle of the dashed-dotted line. FIG. 6 is a cross-sectional view showing the laminated paper (laminated paper having a printed portion) according to Embodiment 2 of the present invention cut in the horizontal direction, and the circular portion (the portion provided with the printed layer) indicated by the dashed-dotted line Shown enlarged. FIG. 7 is an enlarged cross-sectional view showing the laminated paper (laminated paper having a plurality of intermediate layer sheets) according to Embodiment 3 of the present invention, cut in the horizontal direction. FIG. 8 is an enlarged cross-sectional view of a laminated paper (laminated paper having a water-impermeable intermediate layer sheet) according to Embodiment 4 of the present invention cut in the horizontal direction. FIG. 9 is a side view schematically showing a laminated paper manufacturing apparatus (heat seal roller type laminated paper manufacturing apparatus) according to Embodiment 5 of the present invention. FIG. 10 is a side view schematically showing a heat seal roller of a laminated paper manufacturing apparatus according to Embodiment 5 of the present invention. is shown. FIG. 11 is an explanatory diagram for explaining the step of forming the linear heat-sealed portion in the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, and is an explanatory diagram showing the heat seal roller portion as viewed from the side. . FIG. 12 is an explanatory diagram for explaining the step of forming the linear heat-sealed portion in the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, in which the heat seal roller corresponding to FIG. 11 is cut at the end face. FIG. 2 is an explanatory view showing the internal structure of the lever in cross section; 13A and 13B are explanatory diagrams showing the configuration of the linear thermocompression-bonding projections of the heat seal rollers of the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention. FIG. 2 is a perspective view showing the figure, and the central figure is a circular part indicated by a dashed line in the upper figure for explaining the state in which the linear thermocompression convex portions of the pair of heat seal rollers are engaged with each other and press the raw material sheets of the laminated paper. is an enlarged cross-sectional view, and the lower figure is a circular portion indicated by a dashed line on the central side of the central figure for explaining the shape of the linear thermocompression bonding protrusions of the pair of heat seal rollers 1 is an enlarged cross-sectional view of FIG. FIG. 14 shows an example of changing the width between the linear heat-sealed parts according to the crepe ratio in the laminated paper according to Embodiment 1 of the present invention, and (a) corresponds to the first crepe ratio. FIG. 4 is an enlarged plan view of a part of the laminated paper showing the case where the interval (width) between adjacent linear heat-sealed portions is set to a first width, and (b) corresponds to the second crepe rate; FIG. 10 is an enlarged plan view of a part of the laminated paper showing the case where the interval (width) between adjacent linear heat-sealed portions is set to a second width. FIG. 15 is a graph for explaining a preferred specific example of a laminated paper manufacturing method using a laminated paper manufacturing apparatus according to Embodiment 5 of the present invention. Explanatory drawing showing the relationship between the feeding speed of the paper raw material sheet and the thermocompression bonding temperature of the heat seal roller of the laminated paper manufacturing apparatus, (b) Thermocompression bonding temperature of the heat seal roller of the laminated paper manufacturing apparatus and lamination An explanatory diagram showing the relationship between the thickness of the base paper of the raw material sheet of paper (base paper thickness), (c) is the feeding speed of the raw material sheet of laminated paper by the laminated paper manufacturing apparatus and the base paper thickness of the raw material sheet of laminated paper (d) is an explanatory diagram showing the relationship between the thermal compression bonding temperature of the heat seal roller of the laminated paper manufacturing apparatus and the thickness of the nonwoven fabric (nonwoven fabric thickness) of the raw material sheet of laminated paper. is. FIG. 16 is a side view schematically showing a laminated paper manufacturing apparatus (high-frequency sewing machine type laminated paper manufacturing apparatus) according to Embodiment 6 of the present invention.

Hereinafter, a form for carrying out the present invention (hereinafter referred to as an embodiment) will be described. In addition, throughout each embodiment, the same members, elements or portions are denoted by the same reference numerals, and the description thereof is omitted.

Embodiment 1 (Laminated paper in which a printed portion is provided on a nonwoven fabric)
[Overall structure of laminated paper]
The laminated paper of Embodiment 1 is embodied in a laminated paper 10 having a printing portion, as shown in FIGS. 1 to 5. FIG. First, the overall configuration of the laminated paper 10 will be described. As shown in FIG. rectangular shape). On the other hand, in a side view (or a cross-sectional view) of the laminated paper 10, as shown in the side view of FIG. It has a laminated structure composed of a nonwoven fabric 2 as an intermediate layer sheet that constitutes an intermediate layer that is interposed between the two layers. In addition, the laminated paper 10 maintains the laminated structure by heat-sealing one side and the other side of the pair of crepe papers 1 respectively to one side and the other side of the nonwoven fabric 2 at the same location. . That is, the laminated paper 10 includes the first heat-sealed portion 11a and the second heat-sealed portion row 11 (the first heat-sealed portion row 11A and the second heat-sealed portion row 11B), respectively. By heat-sealing the pair of crepe papers 1 to the non-woven fabric 2 at each location of the heat-sealed portion 11b, the pair of crepe papers 1 are heat-sealed to the non-woven fabric 2 at the same locations.

[Heat-sealed part]
The heat-sealed portion 11 will be described in detail. 11 rows of heat-sealed portions 11 are formed so as to extend entirely in the vertical direction). In addition, the laminated paper 10 is arranged so that the multiple rows of heat-sealed portion rows 11 are parallel to each other at regular intervals in the width direction of the laminated paper 10 (the direction perpendicular to the supply direction of the base paper at the time of manufacture, They are continuously arranged side by side over the entirety (horizontal direction in FIG. 1). As a result, the laminated paper 10 has straight band-shaped non-fused portions 12 between adjacent thermally fused portion rows 11 . That is, in the laminated paper 10, multiple rows of non-fused portions 12 are continuously arranged side by side over the entire width direction so as to be parallel to each other at regular intervals. In the laminated paper 10, the multiple rows of thermally-sealed portions 11 are first rows in which the first thermally-sealed portions 11a are linearly arranged at regular intervals in the longitudinal direction of the laminated paper 10. and a second heat-sealed portion row 11B in which the second heat-sealed portions 11b are arranged linearly at regular intervals in the length direction of the laminated paper 10. consists of That is, a first heat-sealed portion row 11A composed of the first heat-sealed portions 11a and a second heat-sealed portion row 11B composed of the second heat-sealed portions 11b are laminated. They are alternately arranged side by side at regular intervals in the width direction of the paper 10 . Further, as shown in FIG. 2, the first heat-sealed portion 11a constitutes a linear segment-shaped fused portion having a predetermined length and a predetermined width in the laminated paper 10. By linearly arranging the first heat-sealed portions 11a having a constant width in the length direction at regular intervals in the length direction, the first line of the heat-sealed portions 11A in the form of a dashed line is formed. The second heat-sealed portion 11b constitutes a linear segment-shaped fused portion having the same length and the same width as the first heat-sealed portion 11a. By arranging the second heat-sealed portions 11b linearly at regular intervals in the length direction, the heat-sealed second row forms a broken line similar to the heat-sealed portion row 11A of the first row. Section 11B is configured. The first heat-sealed portion 11a of the first heat-sealed portion row 11A and the second heat-sealed portion 11b of the second heat-sealed portion row 11B are (that is, adjacent to each other) The heat-sealed portion rows 11A and 11B of the first row), the longitudinal center position of the first heat-sealed portion 11a of the heat-sealed portion row 11A of the first row is the heat-sealed portion of the second row. The positions in the longitudinal direction of the laminated sheets 10 are shifted from each other so as to be in the middle of the gap between the adjacent second heat-sealed portions 11b of the adjoining portion row 11B.

[Non-fused part]
As shown in FIG. 4, the laminated paper 10 has a single linear strip-shaped non-fused portion 12 between two adjacent heat-sealed portion rows 11. The non-fused portion 12 , expands after the laminated paper 10 absorbs water to form an expanded portion. Specifically, as shown in FIGS. 1 and 2, the non-fused portion 12 includes a wide expanded portion 12a (which constitutes a wide expanded portion after the laminated paper 10 is soaked with water), and a and a narrow expanded portion 12b which forms a narrow expanded portion after hydration. More specifically, each of the wide expansion portions 12a is provided in a range (non-overlapping range) where the adjacent first and second heat sealing portion rows 11A and 11B do not overlap each other. It is provided on the laminated paper 10 as a substantially rectangular portion having the length of the non-overlapping range and the width of the non-overlapping range. For example, in FIG. 2, the wide expanded portion 12a includes the first heat-sealed portion 11a of the first heat-sealed portion row 11A on the second row from the left and the second heat-sealed portion row 11A on the third row from the left. The second heat-sealed portion 11b of the heat-sealed portion row 11B is vertically adjacent to the heat-sealed portion row 11A of the first row in the range of the longitudinal intermediate portion that does not overlap with each other In the length range between the ends (between one end and the other end) of the first heat-sealed portion 11a, and from the right edge of the heat-sealed portion row 11A of the first row to the heat of the second row The left edge of another first heat-sealed portion row 11A (in the case of FIG. 2, the fourth heat-sealed portion row 11A from the left) facing each other across the heat-sealed portion row 11B It is provided in a substantially rectangular shape over a width range of up to. On the other hand, each of the narrow expansion portions 12b is provided in the overlapping range (overlapping range) between the adjacent first and second heat sealing portion rows 11A and 11A. is provided on the laminated paper 10 as a small, substantially rectangular portion having a length of and a width of the overlapping range. For example, in FIG. 2, the narrow expanded portion 12b includes the first heat-sealed portion 11a of the first heat-sealed portion row 11A of the second row from the left and the second heat-sealed portion row 11A of the third row from the left. The first heat-sealing portion of the first heat-sealing portion row 11A overlaps with the second heat-sealing portion 11b of the heat-sealing portion row 11B of the first row. Within a length range from one end (for example, upper end) of the portion 11a to the other end (lower end) of the second heat-sealed portion 11b of the heat-sealed portion row 11B of the second row adjacent thereto, and It is provided in a substantially rectangular shape over a width range from the right side edge of the first row of heat-sealed portions 11A to the left side edge of the second row of heat-sealed portion rows 11B.

[Wrinkles in non-fused part (expanded part)]
In the laminated paper 10, the crepe paper 1 of the outer layer and the non-woven fabric 2 of the intermediate layer are not joined at all in the non-fused portion 12, and the non-fused portion 12 of the crepe paper 1 is the heat-fused portion row 11. The portions that are not bound by the heat-sealed portions 11a and 11b (that is, the portions that are not fixed to the nonwoven fabric 2) are movable and deformable with respect to the nonwoven fabric 2 in the thickness direction or the like. In particular, the movable amount of the crepe paper 1 is relatively small in the portion of the non-sealed portion 12 that is close to the heat-sealed portion row 11 (that is, the boundary portion with the heat-sealed portion row 11), In the portion of the non-sealed portion 12 with a large distance from the heat-sealed portion row 11 (that is, the central portion between the adjacent heat-sealed portion rows 11), the movable amount of the crepe paper 1 is relatively The amount of movement of the crepe paper 1 is maximized at the central position between adjacent heat-sealed portion rows 11 . Further, in the laminated paper 10, in each non-fused portion 12 (that is, each wide expanded portion 12a and each narrow expanded portion 12b) of the crepe paper 1 serving as both outer layers, , a large number of crepe wrinkles, which are the original and inherent wrinkles of the crepe paper 1, appear. The crepe wrinkles are small wrinkles extending in the width direction of the laminated paper 10 (and the width direction of the crepe paper 1), and are formed when the crepe paper 1 is manufactured.

On the other hand, after the first moistening of the laminated paper 10, in each non-fused portion 12 (wide expanded portion 12a and narrow expanded portion 12b) of the crepe paper 1, the crepe paper 1 is pushed through crepe wrinkles. By expanding, that is, crepe wrinkles, which are small wrinkles, expand with moisture, wrinkles different from the original crepe wrinkles of the crepe paper 1 (wrinkles with larger dimensions than crepe wrinkles, as shown in FIG. 2) , hereinafter referred to as “expansion wrinkles”) are formed. In this case, in the crepe paper 1, a plurality of adjacent crepe wrinkles swell with moisture and integrate to form one expanded wrinkle corresponding to the plurality of crepe wrinkles. It can be considered that all or part of the original crepe wrinkles disappear. Further, the expansion wrinkles of the crepe paper 1 become large wrinkles (hereinafter referred to as "great expansion wrinkles") extending substantially in the width direction of the wide expansion portion 12a in the wide expansion portion 12a, and the narrow expansion portion 12a is formed. In 12b, wrinkles of an intermediate size (hereinafter referred to as "inflating wrinkles") extending substantially across the entire width of the narrow inflated portion 12b are formed, and both the large inflated wrinkles and the inflated wrinkles are larger than the crepe wrinkles. becomes large wrinkles. In addition, FIG. 14 shows an example of these expansion large wrinkles 12aw and expansion wrinkles 12bw. Furthermore, in the non-fused portion 12 of the crepe paper 1, not all the crepe wrinkles are transformed into the large wrinkles or wrinkles during expansion. Remains on paper 1. In addition, the present inventor has conceived that in the non-fused portion 12 of the crepe paper 1 in the laminated paper 10, there are two types of large expansion wrinkles in the wide expansion portion 12a. That is, the present inventors consider the expanded large wrinkles to be the first type of expanded large wrinkles (hereinafter " It has been found that there are large and small mixed wrinkles") and the second type of expansion large wrinkles in which the crepe wrinkles have completely disappeared (hereinafter referred to as "complete large wrinkles"). Similarly, the inventor of the present invention conceived that, in the laminated paper 10, in the non-fused portion 12 of the crepe paper 1, there are two types of wrinkles during expansion of the narrow expanded portion 12b. That is, the present inventors have found that the wrinkles during expansion are the first type of wrinkles during expansion in which some of the crepe wrinkles do not disappear and remain (that is, mixed) with wrinkles during expansion (hereinafter " It has been found that there are two kinds of crepe wrinkles: a second type of expanded wrinkles (hereinafter referred to as "complete medium wrinkles") in which crepe wrinkles have completely disappeared. Furthermore, in the laminated paper 10, in the crepe paper 1, these large expansion wrinkles, medium expansion wrinkles, large and small mixed wrinkles, medium and small mixed wrinkles, complete large wrinkles, and complete medium wrinkles are caused by drying the laminated paper 10 after moistening. Afterwards, it basically remains as it is.

As a result, in the laminated paper 10 after containing water, the large expanded wrinkles, medium expanded wrinkles, mixed large and small wrinkles, mixed medium and small wrinkles, complete large wrinkles, and complete medium wrinkles are generated both when moistened and when dried after moistened. In particular, the combination of the expanded large wrinkles, mixed large and small wrinkles, and complete large wrinkles, and the group of medium expanded wrinkles, medium and small mixed wrinkles, and complete medium wrinkles are formed in the wide expanded portion 12a and the narrow expanded portion 12b. They are alternately present, and exhibit a unique effect of increasing the sense of volume in a well-balanced manner over the entirety of both sides of the laminated paper 10. - 特許庁

[Dimensions of heat-sealed parts and spacing between heat-sealed parts]
In the laminated paper 10, each row of the heat-sealed portions 11 is formed by arranging the first heat-sealed portions 11a in the form of straight line segments having a constant length and a constant width in a dashed line at regular intervals in the longitudinal direction. In addition, the second heat-sealed portion 11b in the form of a straight line segment having a constant length and a constant width is displaced from the first heat-sealed portion 11a (that is, each second The second heat-sealed portions 11b are arranged in a dashed line at regular intervals in the length direction so that the middle position of the second heat-sealed portion 11b coincides with the middle position of the interval between the first heat-sealed portions 11a. It is In addition, since the length and width of the first heat-sealed portion 11a and the second heat-sealed portion 11b are set to be the same, the first heat-sealed portion 11a and the second heat-sealed portion 11a The portions 11b have the same configuration except that they are arranged with their positions shifted in the length direction as described above. On the other hand, in the laminated paper 10, the length and width of the first heat-sealed portion 11a and the second heat-sealed portion 11b are set to a predetermined length and a predetermined width. That is, the length and/or width of each first heat-sealed portion 11a and each second heat-sealed portion 11b are appropriately set according to the outer dimensions of one sheet of laminated paper 10 when used. (That is, it is appropriately set according to the vertical dimension, the horizontal dimension, etc., which are determined according to the application of the laminated paper 10).

Specifically, for example, when the laminated paper 10 is used as a wet paper towel, the length of each heat-sealed portion 11a, 11b is set to an arbitrary value within the range of 35 mm to 45 mm. It is set to any value within the range of 38 mm to 42 mm, more preferably set to a value of about 40 mm. The width of each heat-sealed portion 11a, 11b is set to an arbitrary value within the range of 1.5 mm to 2.5 mm, preferably about 2 mm. The length-to-width ratio (aspect ratio) of each heat-sealed portion 11a, 11b is preferably set to an arbitrary ratio within the range of 13:1 to 23:1, and is set to about 20:1. is more preferred. That is, it is preferable to set the width of each heat-sealed portion 11a, 11b to about 5% of the length (or set the length to about 20 times the width). Furthermore, in the heat-sealed portions 11 in each row of the laminated paper 10, the interval between the heat-sealed portions 11A and 11b adjacent in the length direction (hereinafter referred to as "longitudinal heat-sealed portion interval") is , is set to any value within the range of 18 mm to 22 mm, preferably to a value of about 20 mm. It is preferable to set the ratio of the length of each heat-sealed portion 11a, 11b to the distance between the heat-sealed portions to 2:1. That is, the heat-sealed portions 11 in each row are set such that the distance between the heat-sealed portions in the length direction is set to about 50% of the length of the heat-sealed portions 11a and 11b (or the length of the heat-sealed portions 11a and 11b is Preferably, the length is set to about twice the distance between the heat-sealed portions. In this way, the integral bonding force between the crepe paper 1 and the non-woven fabric 2 is maintained satisfactorily by the heat-sealed portion row 11, while the non-sealed portion 12 maximizes the expansion rate of the crepe 1, thereby forming the laminated paper 10. volume can be maintained in the best condition.

[End shape of heat-sealed part]
Further, each of the heat-sealed portions 11a and 11b has a plane semicircular curved shape at both ends in the longitudinal direction. As a result, compared to the case where the ends of the heat-sealed portions are rectangular (that is, the corners of the ends are right-angled corners), the crepe paper 1 is It is possible to effectively prevent peeling from the nonwoven fabric 2 from the part. As will be described later, in this case, both ends in the longitudinal direction of the thermocompression surface of the thermocompression convex portion of the heat seal roller, which constitutes the means for forming the thermally fused portion in the laminated paper manufacturing apparatus, also correspond to the corresponding plane halves. Because of the circular curved shape, the heat generated by the thermocompression bonding surface of the heat seal roller is greater than when the edges of each thermocompression bonding surface are rectangular (that is, when the corners of the edges are right angles). The raw material sheet of the crepe paper 1, which receives pressure from the thermocompression bonding surface when forming the fused portion, is not damaged due to excessive pressure concentration at the end of the thermocompression bonding surface, thereby improving the production yield. Also, the quality of the laminated paper 10 can be improved. (That is, as will be described later, when the edge of the thermocompression-bonding surface forms a right-angled corner, stress is applied to the raw material sheet of the crepe paper 1 at the corner, compared with the case where the thermocompression-bonding surface has a curved shape. Concentrating on it increases the possibility that the raw material sheet will be damaged at that corner.)

[Crepe rate of crepe paper]
In the laminated paper 10, the crepe ratio of the crepe paper 1 is set to any value within the range of 20% to 40%, preferably to any value within the range of 20% to 30%. and more preferably set to a value of about 30%. That is, if the crepe ratio of the crepe paper 1 is less than 20%, the crepe paper 1 does not expand or swell sufficiently when the laminated paper 10 is formed by laminating and bonding to the nonwoven fabric 2 and then the laminated paper 10 is soaked with water. Very likely. On the other hand, if the crepe rate of the crepe 1 is more than 40%, it becomes difficult to make the raw material sheet with a paper machine during the production of the raw material sheet of the crepe paper 1 (that is, at the time of papermaking).

[Crepe ratio of crepe paper and arrangement interval of heat-sealed parts]
Further, as shown in FIG. 14, in the laminated paper 10, the arrangement intervals LW1 and LW2 of the heat-sealed portion rows 11 (that is, the interval between the width direction center lines of the adjacent heat-sealed portion rows 11, hereinafter referred to as "width ) is set to an arbitrary value within a predetermined range according to the range of the crepe rate of the crepe paper 1 . Specifically, when the crepe ratio of the crepe paper 1 is in the range of 20% to 26%, the widthwise heat-sealed portion interval is the first widthwise (relatively small dimension) The heat-sealed portion interval LW1 is preferably set to an arbitrary value within the range of 10 mm to 15 mm (that is, the lower limit is preferably 10 mm and the upper limit is preferably 15 mm). Within the range of the heat-sealed part spacing, it is preferable to increase the heat-sealed part spacing in the width direction in proportion to the increase in the crepe ratio. Further, when the crepe ratio of the crepe paper 1 is within the range of 26% to 30%, the interval between the heat-sealed portions in the width direction is the second (relatively large) heat-sealed portion in the width direction. It is preferable to set the part interval LW2 to an arbitrary value within the range of 15 to 25 mm (that is, preferably set the lower limit to 15 mm and the upper limit to 25 mm), and heat fusion in the width direction It is preferable to increase the heat-sealed portion spacing in the width direction in proportion to the increase in the crepe rate within the range of the portion spacing. If the gaps LW1 and LW2 between the heat-sealed portions in the width direction of the laminated paper 10 are smaller than the lower limit, there is a high possibility that the crepe paper 1 will not expand or swell sufficiently when the laminated paper 10 is soaked with water. On the other hand, if the gaps LW1 and LW2 between the heat-sealed portions in the width direction of the laminated paper 10 are larger than the upper limit value, when the laminated paper 10 is saturated with water, the large expansion wrinkles and wrinkles during expansion are larger than the desired expansion rate. There is a possibility that the lamination paper 10 may be expanded or stretched excessively, and slackness may be generated in the expansion large wrinkles or wrinkles during expansion, and the quality of the laminated paper 10 may be deteriorated. For example, if the gaps LW1 and LW2 between heat-sealed portions in the width direction of the laminated paper 10 are set to 30 mm or more (that is, a value greatly exceeding 25 mm, specifically a value that is 125% or more of 25 mm), the laminated paper The present inventor has confirmed through experiments that when the material 10 is hydrated, the large wrinkles and wrinkles during expansion expand or expand excessively and become slack. That is, even if the crepe ratio of the crepe paper 1 is 30%, which is the maximum value in the above range, if the widthwise heat-sealed part intervals LW1 and LW2 in the laminated paper 10 are set to a value of 30 mm or more, the laminated paper 10 When the fabric contains water, the large swelling wrinkles and wrinkles during swelling expand or stretch too much and become loose.

[Pattern part as printing part]
As shown in FIG. 1, the laminated paper 10 can be embodied as a laminated paper 10 having a patterned portion 13 as a first specific example of the printing portion. More specifically, as shown in FIG. 2, the pattern portion 13 can have a structure in which unit patterns 13a and 13b having the same motif are arranged over the entire surface of the laminated paper 10 or over a certain range. In FIG. 2, for example, the unit pattern 13a constitutes a pattern of a predetermined size with a motif of a corolla (aggregation of petals) of a predetermined kind of flower, while the unit pattern 13b has the same corolla as the unit pattern 13a. The motif constitutes a pattern having a dimension larger than that of the unit pattern 13a. The configuration of the pattern portion 13 is not limited to that shown in FIG. 2, and may be configured using any pattern. That is, the pattern portion 13 can use a unit pattern with a motif different from the unit patterns 13a and 13b shown in FIG. Any combination of patterns can also be used. Alternatively, the pattern portion 13 may have a structure using a repeated pattern such as a lattice pattern or a checkerboard pattern other than the structure using individual unit patterns as shown in FIG. Alternatively, the pattern portion 13 may be a monochromatic pattern (whole monochromatic pattern) printed on the entire surface of the laminated paper 10 in an arbitrary single color different from the original base color of the laminated paper 10 (especially the base color of the crepe paper 1). Alternatively, a monochromatic pattern (partially monochromatic pattern) may be formed by printing an arbitrary single color different from the original base color of the laminated paper 10 on a partial range of the laminated paper 10 . Alternatively, the pattern portion 13 may be a pattern (hereinafter referred to as "multi-color pattern") in which two or more different colors are randomly printed on the entire surface or a part of the laminated paper 10. . In short, the pattern portion 13 may have any configuration as long as it can impart a separate visual effect to the laminated paper 10 by printing an arbitrary color on the laminated paper 10 that is different from the base color of the normal laminated paper 10. can be

[Advertising Department as Printing Department]
Further, as shown in FIG. 3, the laminated paper 10 can be embodied as a laminated paper 10 having an advertising portion 14 as a second specific example of the printing portion. Specifically, the advertising section 14 can have, for example, an advertising space 14b and an advertising space 14c inside the outer frame 14a. In this case, the advertising unit 14 prints, for example, the title, copy, etc. of specific advertising content in the advertising space 14b, and prints the details of the advertising content (product description, picture corresponding to the product, etc.) in the advertising space 14c. It can be configured as In FIG. 3, the outlines of the outer frame 14a, the advertisement frame 14b, and the advertisement frame 14c of the advertisement section 14 are drawn with dashed lines, but this is only the outline of the outer frame 14a, the advertisement frame 14b, and the advertisement frame 14c. And, it is a expedient for explaining the range of the advertising frame 14c, and (although it is of course possible to draw them), the outer frame 14a, the advertising frame 14b, and the advertising frame are usually formed on the laminated paper 10. The outline of 14c is never drawn. Further, the outer frame 14a of the advertisement section 14 is also provided for convenience to show an example of the advertisement content, and the entirety can be embodied as the advertisement frames 14a and 14b without providing the outer frame 14a. Moreover, the number of the advertisement frames 14a and 14b can also be one frame, or any number of frames of two or more frames. Furthermore, the configuration of the advertisement section 14 is not limited to that shown in FIG. 2, and can be arbitrarily configured. In other words, the advertising unit 14 is configured to print any advertising content or content in any expression mode or format, as long as the content is printed on an advertising print medium such as a regular leaflet or sales promotion item. be able to. Moreover, as the content to be printed on the advertisement section 14, any desired items such as a company name, a logo mark, and a brand can be printed. Further, the laminated paper 10 having a printing unit is used for novelty goods such as wet paper towels that are distributed in large quantities for the purpose of announcing or advertising various information such as sale information of retail stores and company campaign information. It can also be applied to novelty goods such as paper towels that are distributed in large quantities for the purpose of announcing and making known various events such as the Olympics and expositions.

[Print section structure]
Next, the structure of the printing portion of the laminated paper 10 will be described. As shown in the specific examples of FIGS. 5, 6, 7, and 8, the laminated paper 10 is a surface other than the outer surface of the crepe paper 1 as the outer layer sheet and is arranged inside the laminated paper 10. One of the main features is that the printed portion is printed on the surface using a predetermined printing ink. In addition to this, in the laminated paper 10, even when the laminated paper 10 is dried, the printed portion is visible from the outside through the crepe paper 1 of the outer layer sheet of the laminated paper 10, and when the laminated paper 10 contains water Out of the crepe paper 1 as the outer layer sheet, at least the outer layer on the side where the printed part is provided so that the permeability from the crepe 1 as the outer layer sheet of the printed part increases and the visibility from the outside increases. Another major feature is that the thickness (basis weight) of the crepe paper 1 as a sheet is set, and the material (paper quality) is also set along with the thickness, if necessary. Specifically, in Embodiment 1, the laminated paper 10 is composed of a pair of crepe papers 1 as outer layers and one or more nonwoven fabrics 2 arranged in a laminated state between the pair of crepe papers 1. It has a laminated structure of a multi-layer structure (multi-layer structure of three or more layers), and faces one crepe paper 1 as an outer layer sheet as its inner surface (that is, as an inner surface of the laminated paper 10) It is characterized in that the printed portion is provided on the surface of the nonwoven fabric 2, and the crepe paper 1 is bonded to the nonwoven fabric 2 by thermal fusion and pressure bonding with the thermal fusion bonding portion 1.

[Printing section provided on nonwoven fabric]
For example, as shown in FIG. 5, the printed portion consists of a printed layer 2a provided on one side (one side in the thickness direction) of a nonwoven fabric 2 as an intermediate layer sheet. That is, the nonwoven fabric 2 of the laminated paper 10 is configured as an intermediate layer sheet made of a material that can be printed with a printed portion, and a desired pattern portion 13 or advertisement portion is formed on one side of the nonwoven fabric 2 using a predetermined printing ink. A printing unit is configured by providing 14 by printing. In FIG. 5, the printed layer 2a is drawn as a thin layer on one side of the nonwoven fabric 2 for convenience of explanation. Since the printing ink permeates into the interior of the nonwoven fabric 2 from one side of the nonwoven fabric 2 to form a predetermined pattern of the printed portion, etc., the printing ink completely penetrates into the interior of the nonwoven fabric 2, and the ink for printing is applied to one side of the nonwoven fabric 2. In some cases, no layer of ink is formed, or in other cases, a portion of the printing ink penetrates inside the nonwoven fabric 2 while a remaining layer of printing ink is formed on one side of the nonwoven fabric 2 . In some cases, the other side of the nonwoven fabric 2 is exposed after the printing ink has completely penetrated into the nonwoven fabric 2 , and a layer of the printing ink is formed on the other side of the nonwoven fabric 2 . In any case, the printed portion of the laminated paper 10 is drawn with the highest density on one side of the nonwoven fabric 2 serving as the printed surface, and is visually recognized as the printed layer 2a. That is, the pattern portion 13 and the advertisement portion 14 of the various types of laminated paper 10 described above are printed on one side of the nonwoven fabric 2 using an arbitrary printing ink and an arbitrary printing method according to the configuration of the pattern and the content of the advertisement. is provided by printing on the surface of the

[Configuration of printing layer (printing ink and printing method)]
Here, the printed layer 2a of the printed portion of the laminated paper 10 is formed on one surface of the nonwoven fabric 2 by any printing method using any printing ink. As a method, the printed part is formed using flexographic printing technology, and the printed part is formed using water-based ink or UV (ultraviolet curable) ink as printing ink. More specifically, flexographic printing is a type of letterpress printing that employs the direct transfer method. Rubber or synthetic resin is used as the plate material, and liquid ink consisting of water-based ink and UV ink is used as the printing ink. However, the printed layer 2a of the printed portion of the laminated paper 10 is printed by adjusting the concentration of water-based ink or UV ink and then printing a predetermined pattern portion 13 or advertising portion 14 on one side of the nonwoven fabric 2. make up the department. The laminated paper 10 is formed by inserting the nonwoven fabric 2 having the printed portion between a pair of crepe papers 1 and heat-sealing them to each other by means of the heat-sealing portion row 11 to integrate them. there is Even when the printing target of the printing part is the nonwoven fabric 2 having a fine uneven surface, the laminated paper 10 can be used as the printing part by a plate having the elasticity and shape followability of flexographic printing. The pattern portion 13 and the advertisement portion 14 can be clearly printed. As a result, in the laminated paper 10 produced using the nonwoven fabric 2 with prints, especially in its wet state, the prints are visible from the outside through the crepe paper 1 with good print quality. Moreover, in the laminated paper 10, the printing ink in the printed portion of the nonwoven fabric 2 is water-based ink or UV ink, so the printing ink does not contain an organic solvent. As a result, the laminated paper 10 manufactured using the nonwoven fabric 2 having a printed portion is not affected by volatilization of the organic solvent unlike printing ink using an organic solvent. When applied to supplies, it becomes a user- and environment-friendly product. In printing on the nonwoven fabric 2 of the laminated paper 10, for example, a flexographic printing machine capable of printing up to seven colors is used, and the density of the printing ink for each color is adjusted.

[Nonwoven fabric material]
On the other hand, the laminated paper 10 according to Embodiment 1 shown in FIG. The nonwoven fabric is made of a material that can be reliably heat-sealed and bonded at the fusion-bonded portion. As a result, one surface side of the laminated paper 10 (typically, when the laminated paper 10 is applied to a wet paper towel, one surface side of the laminated paper exposed on the outer surface side of the wet paper towel, that is, the side of the wet paper towel) The pattern portion 13 and the advertising portion 14 can be provided by printing on one surface of the nonwoven fabric 2 to be arranged on the surface side), and the crepe paper 1 serving as a pair of outer layers is preferably formed on both surfaces of the nonwoven fabric 2. to form a laminated paper 10 having a multi-layer structure (three-layer structure in the case of FIG. 5).

[Thickness of nonwoven fabric]
In addition, in the laminated paper 10, as described above, the nonwoven fabric 2 as the intermediate layer sheet has both printability that enables printing on the printed portion and heat-sealability that enables heat-sealing of the crepe paper. However, it is preferable to use a nonwoven fabric having a thickness within a predetermined range in order to have both printability and heat-sealability. Specifically, for example, conventional non-woven paper towels use a non-woven fabric formed into a sheet with a basis weight of 45 to 70 g/cm 2 as a raw material sheet. On the other hand, in the laminated paper 10 of the present embodiment, in addition to using a pair of crepe paper 1 and nonwoven fabric 2 as raw material sheets, the nonwoven fabric 2 has a basis weight of any value within the range of 15 to 25 g / m ² It is preferable to use a nonwoven fabric having a thickness, more preferably a thickness of any value within the range of basis weight 18-22 g/m ² , any value within the range of basis weight 18-20 g/m ² and most preferably a thickness with a basis weight of 20 g/m ² . That is, if the thickness of the nonwoven fabric 2 in the laminated paper 10 is greater than 25 g/m ² in terms of basis weight, the laminated paper 10 may lack flexibility. , may give the user of the laminated paper 10 a hard feel. Further, if the thickness of the nonwoven fabric 2 is larger than 25 g/m ² in terms of basis weight, the strength becomes higher than necessary, which causes an unnecessary increase in cost. Furthermore, during the manufacturing process of the laminated paper 10, for example, in the step of heat-sealing the crepe paper 1 to the nonwoven fabric 2 by a pair of heat-sealing rollers, the nonwoven fabric 2 is heated from the heat-sealing roller having a heat source through one of the crepe papers 1. When heat is transferred to the nonwoven fabric 2, the heat transfer efficiency decreases as the thickness of the nonwoven fabric 2 increases. However, the heat fusion between the other crepe paper 1 and the other surface of the nonwoven fabric may not be sufficiently performed, and the adhesive strength of the nonwoven fabric 2 to the other crepe paper 1 may be insufficient. On the other hand, if the thickness of the nonwoven fabric 2 is less than 15 g/m ² in terms of basis weight, the amount of the thermoplastic resin contained in the nonwoven fabric 2, which is a material for exhibiting the heat-sealing force, is relatively reduced, and both sides of the nonwoven fabric 2 are When the crepe paper 1 is heat-sealed to the crepe paper 1, there is a possibility that sufficient heat-sealing strength cannot be obtained, and the overall stiffness of the laminated paper 10 is weakened. When this happens, the feeling of use of the laminated paper 10 may be adversely affected.

[Raw material fiber for nonwoven fabric]
Furthermore, as the nonwoven fabric 2, when the thickness is set to a value within the above predetermined range in order to combine the above printability and heat fusion, the thickness is particularly a value on the lower limit side within the above predetermined range. (for example, when the thickness has a basis weight of 15 g/m ² , a basis weight of 18 g/m ² , etc.), it is preferable to use a nonwoven fabric made of core-sheath structure composite fibers. That is, when the thickness of the nonwoven fabric 2 is relatively small (that is, when the value is on the lower limit side within the above predetermined range), with such a relatively thin nonwoven fabric, the laminated paper 10 as a whole However, by using a nonwoven fabric made of the core-sheath structure composite fiber, when the crepe paper 1 is heat-sealed to the nonwoven fabric 2, the sheath portion of the core-sheath structure composite fiber is held in place. The nonwoven fabric 2 softens or melts at a heating temperature of , and exhibits adhesive strength due to heat fusion to the crepe paper 1, while the core portion of the core-sheath structure composite fiber remains as it is without softening or melting. In order to maintain the strength and stiffness of itself, the strength and stiffness of the entire laminated paper 10 can be finally maintained, and the thin nonwoven fabric 2 can also maintain the voluminous feel of the laminated paper 10 .

[Thickness of crepe paper]
In the laminated paper 10, the crepe paper 1 has a thickness of any value within a given range to achieve a given transmittance (permeability). Specifically, one crepe paper 1 that is superimposed and joined to one surface of the nonwoven fabric 2 (that is, the surface on which the printed portion is provided) is a nonwoven fabric through the crepe paper 1 in the dry state of the laminated paper 10. 2 (or transmittance such that at least part of the printed portion of the nonwoven fabric 2 is visible in a translucent state), and at least In a wet state due to water content of the laminated paper 10, the transmittance at which the entire printed portion of the nonwoven fabric 2 is clearly visible through the crepe paper 1 (or the entire printed portion of the nonwoven fabric 2 is visible in an almost transparent state. The thickness is set so that the transmittance is such that On the other hand, the other crepe paper 1 which is overlaid and bonded to the other surface of the nonwoven fabric 2 is usually set to have the same thickness as the one crepe paper 1, but may be set to have a different thickness. Even if the other crepe paper 1 has the same thickness as the other crepe paper 1, if the thickness of the nonwoven fabric 2 is within the above-mentioned predetermined range, the nonwoven fabric will be formed through the other crepe paper 1 in the dry state of the laminated paper 10. At least part of the printed portion of 2 is still visible (although the clarity is lower than that of one crepe paper 1 side), and in the wet state due to the water content of the laminated paper 10, through the other crepe paper 1 The entire printed portion of the nonwoven fabric 2 can be visually recognized in a somewhat clear state (although the clearness is lower than that of the crepe paper 1 on one side). In any case, in the laminated paper 10, the crepe paper 1 has an arbitrary value within a predetermined range for achieving a predetermined light transmittance (same as light transmittance, hereinafter simply referred to as "transmittance"). The thickness of the non-woven fabric is set to the thickness of the crepe paper 1 in the dry state of the laminated paper 10 regardless of whether it is viewed from the side of one crepe paper 1 or from the side of the other crepe paper. At least a part of the printed portion of the nonwoven fabric 2 becomes visible, and when the laminated paper 10 is in a wet state due to water content, the entire printed portion of the nonwoven fabric 2 is visible through the crepe paper 1 in a more or less clear state. The unique effect of

Specifically, in the laminated paper 10, the crepe paper 1 has a basis weight of any value within the range of 20 to 50 g/m ² , more preferably 20 to 40 g/m ² . set to any value, more preferably set to any value within the range of 30 to 40 g/m ² , still more preferably set to any value within the range of 30 to 35 g/m ² , even more preferably set to any value within the range of 30-33 g/m ² or any value within the range of 33-35 g/m ² , most preferably set to a value of about 33 g/m ² or about A value of 35 g/m ² is set. For example, the thickness of the crepe paper 1 can be set at a basis weight of 35 g/m ² , 27 g/m ² or 23 g/m ² . As a result of extensive research on the relationship between the crepe wrinkles of the crepe paper 1 and the thickness of the crepe paper 1, the inventor of the present invention found that when the thickness of the crepe paper 1 is outside the above range, the crepe paper 1 of the laminated paper 10 requires It was found that the desired physical properties could not be ensured. That is, when the thickness of the crepe paper 1 is 20 g/m ² or less in basis weight, when the crepe paper 1 is manufactured using the crepe paper manufacturing apparatus, the raw material sheet of the crepe paper 1 (not forming a crepe) It has been found that when the feeding speed of the paper sheet is increased, it is not possible to crepe the stock sheet. On the other hand, when the thickness of the crepe paper 1 exceeds 50 g/m ² in basis weight, the crepe paper 1 is laminated on the nonwoven fabric 2 to form the laminated paper 10 , and the nonwoven fabric 2 is heated at the heat-sealing section 11 . When trying to fuse, the heat from the pressure bonding surface of the heat seal roller is blocked by the thick crepe paper 1 and does not reach the nonwoven fabric 2 sufficiently, and the thermoplastic resin as an adhesive for the nonwoven fabric 2 is used. There is a possibility that the crepe paper 1 cannot be adhered to the nonwoven fabric 2 because the crepe paper 1 cannot be sufficiently melted and the expected adhesive strength to the crepe paper 1 cannot be exhibited.

Further, when the thickness of the crepe paper 1 exceeds 40 g/m ² in terms of basis weight, it becomes necessary to reduce the feeding speed of the raw material sheet to an extremely low speed in order to manufacture the crepe paper at the time of manufacture by the crepe paper manufacturing apparatus. From this point of view, it is preferable to set the upper limit of the thickness of the crepe paper 1 to 40 g/m ² . Further, when the thickness of the crepe paper 1 exceeds 35 g/m ² in terms of basis weight, even if the feed speed of the raw material sheet is slowed down during production by the crepe paper production apparatus, the crepe paper may be creped depending on the performance of the crepe paper production apparatus. From this point of view, it is preferable to set the upper limit of the thickness of the crepe paper 1 to 35 g/m ² .

[Overall thickness of laminated paper (total thickness of crepe paper and nonwoven fabric)]
As described above, the crepe paper 1 and the nonwoven fabric 2, which are the components of the laminated paper 10, are each configured to have a thickness of an arbitrary value within a predetermined range, and the thickness of the entire laminated paper 10 is the crepe paper 1 and the thickness of the nonwoven fabric 2. Preferably, the total thickness of the laminated paper 10 is such that the thickness of each crepe paper 1 is 35 g/ ^m2 in terms of basis weight, and the thickness of the nonwoven fabric 2 is determined by basis weight. 20 g/m ² makes the overall thickness (35+20+35=) 90 g/m ² most preferred. The thickness of the crepe paper 1 is set to this value (35 g/m ² ), the thickness of the nonwoven fabric 2 is set to this value (20 g/m ² ), and the total thickness of the laminated paper 10 is set to this value (90 g/m ² ). Then, when manufacturing the laminated paper 10, the raw material sheet of the laminated paper 10 (that is, the raw material sheet formed by inserting one nonwoven fabric raw material sheet between a pair of crepe paper raw material sheets) is cut at a predetermined feeding position. (i.e., cutting the raw material sheet of the laminated paper 10 into a predetermined length according to the purpose of use), the cutting can be performed best, and the production efficiency can be improved, and the yield can be improved. .

[Effects of Laminated Paper Having a Printing Part]
In this way, the laminated paper 10 having the printed part has the appearance and appearance that the printed parts such as the pattern part 13 and the advertisement part 14 are half embossed through the crepe paper 1, so it exhibits a unique design effect. can do. Specifically, when the laminated paper 10 is dry, the transmittance (transmittance) of the dry crepe paper 1 is relatively low, so the patterns and advertisements on the printed portion are unclear through the crepe paper 1. However, although it is visible to some extent, in the wet state due to water content of the laminated paper 10, the transmittance (transmittance) of the wet crepe paper 1 is relatively high, so the pattern of the printed part The advertisement is clearly visible through the crepe paper 1, and the existence of the crepe paper 1 provides a unique effect of being visually recognized as if it stands out from the laminated paper 10.例文帳に追加

[Effect of printed part when provided on nonwoven fabric]
Moreover, as described above, since the laminated paper 10 is configured as described above, it can be provided with a printed portion printed with the pattern portion 13 and the advertising portion 14 which are not conventional. Therefore, for example, when compared to a wet towel made by simply coloring the raw material fibers (pulp, etc.) of the raw material sheet of the wet towel, such as a conventional colored paper towel (a paper towel whose entire surface is colored in a single color), the laminated paper 10 has a higher print quality. The design portion 13 and the advertisement portion 14 as the portions make the product extremely rich in design. In addition, since the laminated paper 10 is formed by sandwiching the nonwoven fabric 2 provided with the printed part between the pair of crepe papers 1, the pattern and advertisement of the printed part give a soft impression to the observer when viewed from the outside. to give a unique visual effect. In particular, when the laminated paper 10 is applied to sanitary paper products such as wet towels, which are the main uses, the laminated paper 10 as a sanitary paper product is usually provided to the user after being moistened with water. The laminated paper 10 in this state is used by the user to wipe off dirt from his or her hands or a part of the body. In this case, it is necessary to prevent the printing ink on the printed portion of the laminated paper 10 from dissolving with water, eluting from the crepe paper 1 to the outside, and adhering to the hands and body of the user. However, conventional colored wet towels are entirely colored with a predetermined monochromatic printing ink, so that the printed ink is exposed on the surface of the colored wet towel. Therefore, conventional color wet towels need to be printed with organic solvent type printing ink so that the printing ink exposed on the surface does not dissolve and touch the user's hands or skin when wet due to water content. However, as mentioned above, the influence of the volatile components of the organic solvent cannot be denied.

On the other hand, in the laminated paper 10 of the present embodiment, as described above, flexographic printing is used to form a printed portion on the nonwoven fabric 2 with water-based ink or UV ink, and both sides of the nonwoven fabric 2 are coated with crepe paper 1. Since the printing ink is completely covered, the printing ink of the printing part is not directly exposed on the surface of the laminated paper 10, and always remains shielded by the crepe paper 1. - 特許庁Therefore, although the laminated paper 10 is provided with a printing part, it is configured so that the printing ink does not come into direct contact with the user's hand or skin even if it is used in a wet state when it contains water. It can be provided as a laminated paper 10 that is safe and harmless against the environment, and can be provided as an environmentally friendly laminated paper. has the advantage of no The water-based ink used as the printing ink for the printed portion of the laminated paper 10 is preferably a pigment-type water-based ink. It is possible to effectively prevent the ink from easily dissolving and eluting to the outside.

[Method for manufacturing laminated paper having printed portion (width dimension of nonwoven fabric raw material sheet)]
Next, a method for manufacturing the laminated paper 10 having a printing portion will be described. In general, non-woven fabrics are manufactured by a predetermined web forming method such as a dry method, a wet method, or a spunbond method from predetermined raw material fibers made of natural fibers (pulp) and synthetic fibers (also called fleece). The fibers of the web are bonded by a predetermined bonding method such as a chemical bonding method, a thermal bonding method, a needle punching method, or a water entanglement method. On the other hand, in the laminated paper 10 of the present embodiment, it is preferable to use a nonwoven fabric made of the core-sheath structure conjugate fiber as the nonwoven fabric 2. Furthermore, as the nonwoven fabric 2, an air-through method, which is a kind of thermal bonding method, is used. It is more preferable to use a non-woven fabric manufactured by bonding fibers together (hereinafter referred to as "air-through non-woven fabric" for convenience of explanation). This air-through nonwoven fabric is rich in stretchability and flexibility, and has advantages such as giving a soft touch to the user and having a good touch feeling. also enables the expression of good adhesive strength when the above. Further, the details will be described later in the section of the laminated paper manufacturing apparatus and the laminated paper manufacturing method, but in the manufacturing of the laminated paper 10, a pair of raw material sheets of the crepe paper 1 (hereinafter referred to as "crepe paper raw material sheet") ), a raw material sheet for the nonwoven fabric 2 (hereinafter referred to as "nonwoven fabric raw material sheet") is sandwiched between the raw material sheets (hereinafter referred to as "laminated raw material sheet") having a three-layer structure (three-ply). Then, the laminated raw material sheet is fed, for example, between a pair of heat-sealing rollers, and the pair of crepe paper raw material sheets are heat-sealed to the non-woven fabric raw material sheet by the pair of heat-sealing rollers to form a final product. manufacturing laminated paper. At this time, the crepe paper raw material sheet and the nonwoven fabric raw material sheet usually have the same width dimension of a predetermined width (for example, the width dimension of 1200 mm). In particular, if the widthwise dimension of the nonwoven fabric sheet is smaller than the widthwise dimension of the crepe paper raw material sheet, the crepe paper raw material sheet cannot be heat-sealed to the nonwoven fabric sheet at the widthwise end of the laminated raw material sheet. Therefore, it is not preferable that the widthwise dimension of the nonwoven fabric raw material sheet is smaller than the widthwise dimension of the crepe paper raw material sheet.

[Setting the width dimension of the raw nonwoven fabric sheet according to the material of the nonwoven fabric]
On the other hand, as described above, when the nonwoven fabric 2 is provided with the printed portion, the raw material sheet of the nonwoven fabric is fed to a predetermined printing device in advance, and the predetermined printed portion is printed on the raw material sheet. At this time, when the air-through nonwoven fabric is used as the nonwoven fabric, it is thought that it is due to the large elasticity of the nonwoven fabric. As a result of continuing intensive research on the invention of the laminated paper, the inventors came up with the following configuration. That is, when forming the printed portion on the laminated paper 10, for example, when forming the printed portion using flexographic printing, if the printed portion is printed on the nonwoven raw material sheet 2 having a width of 1200 mm, after printing, the nonwoven raw material sheet will be The width shrinks from 1200 mm to 1150 mm (i.e., the width shrinks to about 96% of the original width), or under other conditions the width of the nonwoven raw material sheet shrinks from 1300 mm to 1200 mm (i.e., the original width shrinks to 1200 mm). The present inventors have found that the width shrinks to about 92% of the width). Considering the shrinkage of the raw nonwoven fabric sheet at the time of printing, the inventor also tried printing in a state in which the raw nonwoven fabric sheet was stretched in the width direction (by the amount of shrinkage), but in this case, the raw nonwoven fabric sheet We have found that it is difficult to perform the desired printing. Therefore, in the method for manufacturing the laminated paper 10 having a printing part, the width of the laminated paper 10 to be actually obtained is adjusted according to the shrinkage rate in order to compensate for the shrinkage during printing on the nonwoven raw material sheet as the nonwoven raw material sheet. (ie, the width of the nonwoven fabric sheet is set so as to compensate for the shrinkage dimension according to the shrinkage rate).

Through experiments, the inventors have found that, for example, when a nonwoven fabric raw material sheet having a width of 1200 mm is used and the printed portion is printed on this nonwoven raw material sheet, the nonwoven raw material sheet shrinks after printing, and the width becomes 1150 mm. (that is, a width that is 50 mm smaller than the width before printing, or a width that is approximately 4% smaller than the width before printing). Therefore, in manufacturing the laminated paper of the present embodiment, a nonwoven fabric is used as the base paper having a size about 4% (about 4.12%) larger than the required size after shrinkage. For example, when the width of the laminated paper raw material sheet is 1200 mm, the width of the crepe paper raw material sheet is the same 1200 mm, but the width of the nonwoven raw material sheet is about 4% larger than 1200 mm (for example, 1250 mm). width).

[Unique effect by setting the width dimension of the nonwoven fabric raw material sheet]
According to the method for producing laminated paper using the raw nonwoven fabric sheet whose width direction dimension is set as described above (that is, the width direction dimension is set so as to compensate for the shrinkage rate of the raw nonwoven fabric sheet during printing), the nonwoven fabric The width of the raw material sheet becomes the same width as the predetermined width of the laminated paper raw material sheet (that is, the predetermined width of the crepe paper raw material sheet) after the printing process of the printing unit. For example, when the predetermined width of the laminated paper raw material sheet (that is, the predetermined width of the crepe paper raw material sheet) is 1200 mm, the width of the nonwoven raw material sheet is also the same width of about 1200 mm (that is, 50 mm smaller than the width before printing). width (or about 4% less than the width before printing). Therefore, a laminated paper material sheet having a three-layer structure in which the printed nonwoven fabric sheet (width of about 1200 mm) is laminated between a pair of crepe paper material sheets (width of 1200 mm) has a crepe sheet as a pair of outer layers. The paper raw material sheet and the non-woven fabric raw material sheet as the intermediate layer all have the same width, and can be smoothly provided to the laminated paper manufacturing process as a laminated paper raw material sheet with a width of 1200 mm, and the laminated paper 10 after manufacturing is also possible. , will have a width of 1200 mm, which is the desired width.

Embodiment 2 (Laminated paper in which the printing part is provided on crepe paper)
[Overall structure of laminated paper and structure of crepe paper]
As shown in FIG. 5, in the example of Embodiment 1, the laminated paper 10 has a three-layer structure (three-sheet superimposed structure) consisting of a pair of crepe papers 1 and a sheet of nonwoven fabric 2. In addition, although the printed layer 2a of the printed portion is provided on the surface of the nonwoven fabric 2 as the intermediate layer sheet, as shown in FIG. A print layer 1a of a print portion is provided on the inner surface of crepe paper 1 as a sheet. That is, in Embodiment 2, the laminated paper 10 includes a pair of crepe papers 1 as outer layer sheets and nonwoven fabric as one or more intermediate layer sheets disposed between the pair of crepe papers 1 in a laminated state. 2 (multilayer structure of three or more layers), and as the inner surface (that is, as the inner surface of the laminated paper 10), one crepe paper 1 as the outer layer sheet. The printing portion is provided, and the crepe paper 1 is bonded to the nonwoven fabric 2 by heat sealing and pressure bonding by the heat sealing portion 1 . In addition, the inner surface of the crepe paper 1 is a laminated paper 10 having a laminated structure in which one (or two or more) nonwoven fabric 2 as an intermediate layer sheet is sandwiched between a pair of crepe papers 1 as outer layer sheets. The surface that comes to the inner side of the laminated structure of the laminated paper 10 (that is, the side that faces the nonwoven fabric 2) when the . Here, on both sides of the crepe paper 1, one surface is a surface with high smoothness (that is, a relatively smooth surface with a good touch feeling), and the other surface is a surface with low smoothness (that is, In the laminated paper 10 of Embodiment 2, the above-mentioned laminated structure is formed with the front surface side of the crepe paper 1 as the inner surface side. is preferred.

[Unique effect of printing on the inner surface (surface) of crepe paper]
According to the laminated paper 10 of Embodiment 2, the nonwoven fabric 2 is interposed between a pair of crepe papers 1, and the crepe paper 1 is heat-sealed to the nonwoven fabric 2 by the heat-sealing part 1. The present inventor has confirmed through experiments that the crepe paper 1 is more reliably and strongly adhered to the nonwoven fabric 2 when fixed by pressing. In addition to this, when the printing layer 1a of the printing portion is provided on the inner surface of the crepe paper 1 as in Embodiment 2, the inner surface of the crepe paper 1 on which the printing layer 1a is provided (that is, printed with printing ink) is Since the surface has a high degree of smoothness, the desired pattern portion 13 and the advertisement portion 14 can be printed in a better state, and the printing quality can be further improved. In addition, in the second embodiment, since the printed portion is provided on the inner surface of the crepe paper 1, the printed portion does not come into contact with the user's fingers or skin (skin). The anxiety of the user can be eliminated, and health problems caused by printing ink can be reliably prevented. In addition, when providing the printing unit in the laminated paper 10, as in the second embodiment, rather than providing the printing unit in the crepe paper 1 that is the outer layer of the laminated paper 10, as in the first embodiment, the middle of the laminated paper 10 It is preferable from the viewpoint of printing quality to provide the printed portion on the nonwoven fabric 2 that serves as the layer (that is, the inner layer).

[Each thickness of crepe paper, nonwoven fabric, and laminated paper]
In the case of the laminated paper 10 of the second embodiment, the thickness of the crepe paper 1, the thickness of the nonwoven fabric 2, and the thickness of the entire laminated paper 10 can be set in the same manner as in the case of the first embodiment.

Embodiment 3 (Laminated paper in which a colored portion is provided on an intermediate layer sheet)
[Overall structure of laminated paper and structure of non-permeable sheet as intermediate layer sheet]
As shown in FIG. 5, in the example of Embodiment 1, the laminated paper 10 has a three-layer structure, and has a configuration in which a printed portion is provided on the surface of a nonwoven fabric 2 as an intermediate layer sheet. As shown in , in Embodiment 2, the laminated paper 10 has a three-layer structure, and has a configuration in which a printed portion is provided on the inner surface of the crepe paper 1 as an outer layer sheet. As shown in FIG. 7, in the laminated paper 10 having a three-layer structure according to Embodiment 3, the intermediate layer sheet is composed of a non-permeable sheet 5 (for example, a non-permeable sheet or a waterproof sheet) made of a synthetic resin film. , a printed layer 5a of a printed portion is provided on the surface of the impermeable sheet 5. As shown in FIG. That is, in Embodiment 3, the laminated paper 10 includes a pair of crepe papers 1 as outer layer sheets and a non-transmissive intermediate layer sheet as a single intermediate layer sheet disposed between the pair of crepe papers 1 in a laminated state. It has a multilayer structure (three-layer structure) consisting of a transparent sheet 5, and the printed portion is provided on the surface of the non-permeable sheet 5 as an inner surface (that is, as an inner surface of the laminated paper 10). 2. The crepe paper 1 is heat-sealed and pressure-bonded to the impermeable sheet 5 by the heat-sealing portion 1 . As the non-permeable sheet 5, for example, in addition to what is generally called a vinyl sheet or vinyl film, a resin film or resin sheet made of polyvinyl chloride resin, a resin sheet made of polyolefin resin (made of polyethylene resin, polypropylene resin, etc.) can be used. A resin film, a resin sheet, or the like can be suitably used. Moreover, the thickness of the non-permeable sheet 5 is preferably set to a predetermined thickness within a range of, for example, 0.1 mm to 0.2 mm. The non-permeable sheet as the non-permeable sheet 5 has a main function of blocking the permeation of moisture, but the non-permeable sheet is a non-permeable sheet that blocks the permeation of oil (hereinafter referred to as " (referred to as "oil-impermeable sheet"). In addition, in the present document, the term "non-permeable sheet" simply includes the oil-impermeable sheet in addition to the water-impermeable sheet, and also blocks the permeation of other liquids and some gases. Including things. That is, in the present invention, the non-permeable sheet may be a sheet-like or film-like intermediate layer sheet made of a synthetic resin that blocks permeation of moisture and/or oil.

[Unique effect of non-permeable sheet]
According to the laminated paper 10 of Embodiment 3, since the non-permeable sheet 5 including the water-impermeable sheet and the oil-impermeable sheet as the intermediate layer sheet blocks the permeation of water and oil, the laminated paper 10 is In addition to representative products such as wet paper towels, it can be applied to wrapping paper for temporarily or long-term wrapping of objects and articles to which moisture and oil are attached, and the use of the laminated paper 10 is greatly expanded. can be expanded.

[Scope of Invention of Laminated Paper of Embodiments 1 to 3]
By the way, the invention of the laminated paper 10 of Embodiments 1 to 3 is mainly characterized in that the printed portion is provided on the inner surface side of the laminated paper 10 (the inner surface of the intermediate layer sheet or the outer layer sheet). That is, the invention of the laminated paper 10 of Embodiments 1 to 3 has a configuration other than the printing section (configuration of the heat-sealing section, etc.) different from that of the above embodiments, as long as such a printing section is provided. can be That is, the laminated paper 10 has a multi-layer structure consisting of an outer layer sheet and an intermediate layer sheet, and as long as the printing portion is provided on the inner surface side, the structure of the heat-sealed portion and the structure of other elements or portions can be changed. Any configuration is possible. For example, in the laminated paper provided with the printing unit of the present invention, the row of heat-sealed portions may be formed in a broken line shape as in the first embodiment, a wavy line shape having another configuration, a dotted line shape, or a single point It can be a chain line made of chain lines such as a chain line or a two-dot chain line, or a line shape such as a zigzag shape or a zigzag shape, or a straight line shape made of solid lines. Alternatively, it can be embodied in laminated paper in which dot-shaped heat-sealed portions are scattered. However, in order to obtain a sufficient expansion effect over the entire laminated paper after the laminated paper absorbs water and to give a sense of volume during use, the row of heat-sealed portions must be formed in a broken line (or a dashed line) as in the above embodiment. It is preferable to use a linear shape such as a shape).

[Invention of laminated paper without a printing unit]
On the other hand, among the configurations of the laminated paper 10 described in the first embodiment, the following configuration alone has novelty and inventiveness in view of the prior art. That is, in addition to the invention of laminated paper having a printing unit as described above (hereinafter referred to as the "first invention of laminated paper"), the thickness of the nonwoven fabric is set within the predetermined range, and the thickness of the crepe paper is is within the predetermined range (hereinafter referred to as the "second laminated paper invention"), and the widthwise heat-sealed portion interval is set according to the crepe ratio of the crepe paper. The invention of laminated paper within the prescribed range (hereinafter referred to as the "third invention of laminated paper"), even in the invention itself (that is, even if it does not have a printing unit), is novel and novel in the light of the prior art. It has progressiveness.

[Second laminated paper invention (thickness range of crepe paper and thickness range of nonwoven fabric)]
Specifically, the second laminated paper invention comprises crepe paper as a pair of outer layer sheets, and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers, The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, and the crepe paper is: It has a thickness in the range of 20-50 g/m ² , and the non-woven fabric has a basis weight in the range of 15-25 g/m ² .

[Third Laminated Paper Invention (Crepe Rate of Crepe Paper and Spacing Between Heat-Sealed Parts in the Width Direction)]
Further, the third laminated paper invention comprises crepe paper as a pair of outer layer sheets and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers, wherein the crepe paper The crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles extend, and the adjacent heat-sealed portion row The distance between the heat-sealed portions in the width direction, which is the distance between the center lines in the width direction, is set to an arbitrary value within a predetermined range according to the range of the crepe rate of the crepe paper, and the crepe rate of the crepe paper is In the range of 20% to 26%, the distance between the heat-sealed portions in the width direction is set in the range of 10 mm to 15 mm, and the crepe rate of the crepe paper is in the range of 26% to 30%. The distance between the heat-sealed portions in the width direction is set within a range of 15 to 25 mm.

Embodiment 4 (Laminated Paper Having Improved Nonwoven Fabric in Intermediate Layer Sheet)
[Configuration of nonwoven fabric]
The laminated paper of the present invention can also be embodied as follows, which is characterized by the configuration of the nonwoven fabric as the intermediate layer sheet. Specifically, in the laminated paper of Embodiment 4, the nonwoven fabric is made of a highly stretchable nonwoven fabric. That is, conventional nonwoven fabrics are made of so-called pulp nonwoven fabrics, which are produced by accumulating fibrous materials obtained by pulverizing wood pulp into a web and joining them together to form a sheet-like portion. In addition, conventional wet paper towels are generally manufactured from nonwoven fabric, and as this nonwoven fabric, a sheet having a basis weight of 45 to 70 g/cm 2 is used.

[Type of nonwoven fabric of the present invention (type by manufacturing method)]
On the other hand, for example, using the cross-sectional view of FIG. 5, the laminated paper 10 of Embodiment 4 uses an air-through type nonwoven fabric containing air (manufactured by thermal bonding) as the intermediate layer sheet. can do. In this way, the laminated paper 10 has a structure that is thick and highly stretchable as a whole, and also has a structure that has good touch feeling and heat-sealability. Furthermore, the nonwoven fabric of the laminated paper of Embodiment 4 is made of a nonwoven fabric manufactured using so-called core-sheath structure composite fiber as a raw material. This core-sheath composite fiber is a short synthetic fiber, and is a raw material for a non-woven fabric web (stacked layer of fibers sometimes called fleece) manufactured by a dry method or the like. In addition to making fibers, as a method for bonding between fibers, an air through method among thermal bonding methods is used (that is, by passing hot air from the surface to the back surface in the thickness direction of the web, the sheath portion of the composite fiber is removed. The fibers are bonded by melting the resin to bond the fibers together. The core-sheath structure fiber is a fiber having an outer sheath made of PE (polyethylene) and an inner (center) core made of PET (polyethylene terephthalate). Since this nonwoven fabric does not use an adhesive for bonding between fibers, it has a soft texture, but does not absorb water. When the laminated paper 10 is soaked with water, the nonwoven fabric 2 does not supply moisture to the printing ink of the printing layer 2a on the surface due to the moisture. Therefore, this laminated paper 10 exerts an additional specific effect that the printing quality of the printed portion of the nonwoven fabric 2 can be maintained satisfactorily. In addition, in this nonwoven fabric, the PE in the sheath softens at a low temperature, and the crepe paper 1 can be well bonded by the heat-sealed portion 11 of the laminated paper 10, while the PET in the core is the fiber itself. Maintain strength to maintain the overall strength of the nonwoven. That is, in this nonwoven fabric, the sheath portion of the core-sheath structure develops adhesive strength and functions as an adhesive to crepe paper, while the core portion contributes to maintaining strength.

As a material for the core-sheath structure fiber of this nonwoven fabric, polyethylene (PE) has a melting point of about 120°C (that is, low density PE with a melting point of 95 to 130°C or 114 to 126°C, melting point of 120 to 140°C). Or high density PE of 126-137° C.) can be used, usually low density PE is used, but PE with a density of around 120° C. melting point may be used. On the other hand, polypropylene (PP) having a melting point of about 140° C. (that is, PP having a low melting point) can be used. There are three types of PP: copolymerized random PP, copolymerized block PP, and homopolymerized homo PP. Homo PP has a melting point of 160 to 165 ° C. Since the melting point is 140 to 150° C. (or 160 to 165° C.), block PP having a low melting point is used. Also, random PP having the lowest melting point may have a melting point of about 135-145°C or a melting point of 135-150°C. In this embodiment, random PP can be used as the PP of the raw fibers of the nonwoven fabric, and in this case, the random PP has a low melting point of 125°C.

[Nonwoven fabric types (types by melting point)]
In the laminated paper of the present invention, when an arbitrary nonwoven fabric is used as the intermediate layer sheet, there is a nonwoven fabric to which the crepe paper does not adhere well due to the melting point. Therefore, as the nonwoven fabric 2 of the laminated paper 10, the crepe paper 1 is a heat-sealable component (for example, a core A non-woven fabric having a melting point is used so that it can be reliably adhered to the non-woven fabric 2 by the sheath portion of the sheath-structured fiber (PE, etc.). In particular, the laminated papers of the present invention, including the laminated papers 10 of Embodiments 1 to 3, have a structure in which a pair of crepe papers are bonded to a nonwoven fabric only by the adhesive force of the linear heat-sealed part row, so such a small amount The type of non-woven fabric is selected so that sufficient bonding strength can be obtained between the crepe paper and the non-woven fabric with a sufficient bonding area. As such a nonwoven fabric, a nonwoven fabric which is a core-sheath type conjugate fiber as a polyester-based conjugate fiber and which is manufactured using heat-fusible fibers for nonwoven fabric can be used. For example, as the nonwoven fabric in this case, a nonwoven fabric manufactured from a core-sheath type composite fiber having a fineness of 2.2 dtex, a cut length of 5 mm or 10 mm, and a softening point of the sheath component of about 110° C. may be used, or a fineness of 1.7 dtex and a cut length of 5 mm. , using a nonwoven fabric manufactured from a core-sheath type composite fiber having a sheath component softening point of about 110°C, or a nonwoven fabric manufactured from a core-sheath type composite fiber having a fineness of 2.2 dtex, a cut length of 5 mm, and a sheath component softening point of about 130°C. can be used. Alternatively, a nonwoven fabric obtained by appropriately mixing two or more types of the above-mentioned core-sheath type conjugate fibers may be used.

Embodiment 5 (Laminated Paper Manufacturing Apparatus)
The laminated paper of the present invention, including the invention of the laminated paper 10 of Embodiments 1 to 3, is preferably manufactured using the laminated paper manufacturing apparatus described below.

[Configuration of manufacturing equipment]
As shown in FIG. 9, the laminated paper manufacturing apparatus according to Embodiment 5 has three support rollers 51, 52, and 53 arranged side by side, each of which is a raw material sheet of crepe paper (one of the pair of crepe papers). A roll-shaped crepe paper 21 to be a crepe paper raw material sheet), a roll-shaped nonwoven fabric 22 to be a raw material sheet of the nonwoven fabric (nonwoven fabric raw material sheet), and a raw material sheet of the other crepe paper of the pair of crepe papers (crepe paper raw material sheet ) and the other roll-shaped crepe paper 23 are supported so as to be rotatably supplied. In addition, one crepe paper 1, nonwoven fabric 2, and the other crepe paper 1 pulled out from one rolled crepe paper 21, rolled nonwoven fabric 22, and the other rolled crepe paper 23 are respectively laminated. A raw material sheet (laminated paper raw material sheet) of the laminated paper 10 is constructed with (that is, in a laminated state of three layers). This laminated paper raw material sheet is folded back by a first guide roller 61 and guided and held between a first heat-sealing roller 70 as one pressing roller and a second heat-sealing roller 80 as the other pressing roller. be introduced. The laminated paper raw material sheet is folded back from the first guide roller 61 to the second heat seal roller 80 and guided by the second guide roller 62 to be guided by the first heat seal roller 70 and the second heat seal roller 70 . is inserted between the heat seal roller 80 of the Before being inserted between the first heat-sealing roller 70 and the second heat-sealing roller 80, the laminated paper raw material sheet is heat-sealed in a state in which the crepe paper 1 and the nonwoven fabric 2 are not heat-sealed. The laminated paper before fusion is 10X.

Next, the laminated crepe paper 1 and the nonwoven fabric 2 are heat-sealed between the first and second heat seal rollers 70 and 80 to form the laminated paper 10 having the heat-sealed portions 11 . The laminated paper raw material sheet in the stage after this heat-sealing is the post-heat-sealing laminated paper 10Y in which the crepe paper 1 and the non-woven fabric 2 are heat-sealed. Then, the long heat-sealed laminated paper 10Y (as base paper before cutting) led out from the first and second heat seal rollers 70 and 80 is passed through the third guide roller 63 and the fourth guide roller 63. It is folded back by the roller 64 and guided to the take-up roller 55 . The take-up roller 55 winds the heat-sealed laminated paper 10Y into the rolled laminated paper 10R. This rolled laminated paper 10R is removed from the take-up roller 55 and used as base paper for wet towels and the like. A slitter is arranged between the fourth guide roller 64 and the take-up roller 55 to cut the heat-sealed laminated paper 10R in the width direction into a plurality of laminated papers 10 having a predetermined width. and is wound on the take-up roller.

[Heat seal roller]
Next, the first and second heat seal rollers 70, 80 will be described in detail with reference to FIGS. 10-13. FIG. 10 shows a state of the first and second heat seal rollers 70 and 80 of FIG. 9 viewed from the top side, and the first and second heat seal rollers 70 and 80 have their axial centers parallel to each other. As shown in FIG. 1, they are arranged side by side in front of and behind in the supply direction of the pre-heat-sealing laminated paper 10X. In addition, the first and second heat seal rollers 70 and 80 have the same predetermined roller length L (for example, the axial length of any value within the range of 1200 mm to 1500 mm), and the same predetermined roller diameter. D (eg, a diameter of any value in the range 180 mm to 300 mm).

[First heat seal roller]
As shown in FIGS. 9 and 10, the first heat-sealing roller 70 is formed in a cylindrical shape having the predetermined roller diameter D, and has a non-press-bonding portion 71 formed on its peripheral surface in the shape of a ring concave groove with a constant width. , and thermocompression-bonding projections 72 in the shape of a broken-line convex ring (or a broken-line convex streak) having a constant width are arranged parallel to each other so as to be alternately arranged in the axial direction. As shown in FIG. 11, each of the non-pressing portions 71 intermittently extends as an arc-shaped surface in the circumferential direction along the peripheral surface of the first heat-sealing roller 70, and is a flat surface in the width direction. It has a surface 72a. Specifically, each of the thermocompression-bonding protrusions 72 linearly extends along the peripheral surface of the first heat-sealing roller 70 for a predetermined length in the circumferential direction (as the peripheral surface of the thermocompression-bonding protrusions 72). The pressing surfaces 72a are arranged continuously at regular intervals in the circumferential direction of the first heat seal roller 70 . The thermocompression-bonding surface 72a of the thermocompression-bonding projection 72 is an arc-shaped surface (curved surface) in the length direction, and the arc length is equal to that of the first heat-bonding portion 11a or the first heat-bonding portion 11a of the heat-bonding portion row 11. It is set to have the same length as the length of the heat-sealed portion 11b of No. 2. The thermocompression-bonding surface 72a of the thermocompression-bonding protrusion 72 is flat in the width direction, but the width thereof is equal to that of the first heat-bonding portion 11a of the heat-bonding portion row 11 or the second heat-bonding portion 11a. The width is set to be the same as the width of the fused portion 11b. Furthermore, the gap between the adjacent thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 72 in each row is the same as the adjacent first thermal bonding portion 11a or the second thermal bonding portion 11a of the thermal bonding portion row 11. It is set to have the same dimension as the gap between the portions 11b.

In this manner, the first heat seal roller 70 forms the thermal compression bonding convex portion 72 in the shape of a broken-line convex ring along the entire circumference in the circumferential direction, thereby forming one row of the thermal bonding portion row 11 of the laminated paper 10. configured to form In addition, the first heat seal roller 70 arranges the multiple rows of heat-sealing protrusions 72 with the same constant interval as the widthwise arrangement interval of the multiple rows of heat-sealed portion rows 11 of the laminated paper 10 . They are continuously arranged side by side over the entire axial direction so as to be parallel. As a result, the first heat seal roller 70 has the non-press-bonded portions 71 formed in the shape of ring grooves between the adjacent thermally-pressed protrusions 72 . The first heat-sealing roller 70 extends along the entire axial direction so that the multiple rows of non-bonded portions 71 are parallel to each other at the same intervals as the non-bonded portions 12 of the laminated paper 10 . They are arranged side by side continuously. Furthermore, in the first heat seal roller 70, the thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 72 in adjacent rows are arranged so that the center position of the thermocompression bonding surface 72a of one thermocompression bonding protrusion 72 in the length direction is the same as that of the other thermocompression bonding surface 72a. The positions of the first heat seal rollers 70 in the circumferential direction are shifted from each other so that the first heat seal rollers 70 are positioned at intermediate positions between the adjacent thermocompression bonding surfaces 72 a of the thermocompression bonding protrusions 72 . As a result, as shown in FIGS. 11, 12, and 13, the thermal compression bonding protrusions 72 are formed in the thermal compression bonding protrusions of the first row corresponding to the thermal bonding portion rows 11A of the first row of the laminated paper 10. It is composed of a portion 72A and a second row of thermocompression-bonding protrusions 72B corresponding to the second row of heat-sealed portion rows 11B. Then, the first heat-sealing convex portion 72A of the first row has a heat-sealing surface 72a corresponding to the first heat-sealing portion 11a of the heat-sealing portion row 11A of the first row. 70, and the second row of thermo-compression convex portions 72B has a thermo-compression bonding surface 72a corresponding to the second heat-sealed portion 11b of the second row of heat-sealed portion rows 11B. It is arranged in the circumferential direction of the first heat seal roller 70 .

Further, as shown in FIG. 10, the thermal compression bonding surface 72a of the thermal bonding convex portion 72 extends linearly in plan view (in the circumferential direction of the second heat sealing roller 70, it is curved along the circumferential surface). ) and semicircular curved portions 72y at both longitudinal ends of the straight narrow strip portion 72x. As a result, the laminated paper 10 obtained by thermocompression bonding and heat-sealing the crepe paper raw material sheet of the laminated paper raw material sheet to the nonwoven fabric raw material sheet by the thermocompression bonding surface 72 a of the thermocompression bonding convex portion 72 of the heat seal roller 70 is thermally fused. Each of the heat-sealed portions 11a and 11b of the bonding portion row 11 is arranged in the longitudinal direction of the laminated paper 10 corresponding to the outer shape of each thermocompression bonding surface 72a, as shown in FIGS. and semi-circular portions at both longitudinal ends of the straight strip-shaped portion. Furthermore, as shown in FIG. 13, a pair of side surfaces 72b extends perpendicularly to the thermocompression bonding surface 72a on both sides in the width direction of the thermocompression bonding surface 72a of each thermocompression bonding protrusion 72. As shown in FIG.

[Second heat seal roller]
On the other hand, as shown in FIGS. 9 and 10, the second heat-sealing roller 80 is formed in a cylindrical shape having the predetermined roller diameter D, and has a non-pressure-bonding groove formed on the peripheral surface thereof in the shape of a ring groove having a constant width. A portion 81 and a thermocompression-bonding convex portion 82 having a convex ring shape (or a convex strip shape) with a constant width are arranged parallel to each other so as to be alternately arranged in the axial direction. As shown in FIG. 11, each of the non-press-bonded portions 81 is formed continuously as an arc-shaped surface in the circumferential direction along the circumferential surface of the second heat-sealing roller 80 (that is, the circumferential surface of the second heat-sealing roller 80). It has a compression bonding surface 82a (peripheral surface of the thermocompression bonding convex portion 82) which extends over the entire circumference of the surface and is flat in the width direction. A thermocompression-bonding surface 82a of the thermocompression-bonding protrusion 82 is an arcuate surface (curved surface) in the length direction. The thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82 is flat in the width direction, but the width thereof is equal to that of the first heat-bonding portion 11a of the heat-bonding portion 11 or the second heat-bonding portion 11a. The width is set to be larger than the width of the attachment portion 11b (that is, the width is larger than the width of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat seal roller 70).

In this way, the second heat-sealing roller 80 has the ring-shaped thermocompression-bonding projections 82 at positions facing the thermocompression-bonding projections 72 of the first heat-sealing roller 70 . formed over the As a result, the pre-heat-sealed laminated paper 10X is sandwiched between the heat-sealing projections 72 of the first heat-sealing roller 70 and the heat-sealing projections 82 of the second heat-sealing roller 80, and the heat-sealing projections are formed. The crepe paper 1 of the laminated paper before thermal bonding 10X is thermally bonded and thermally bonded to the nonwoven fabric 2 between the thermal compression bonding surface 72a of the portion 72 and the thermal compression bonding surface 82a of the thermal compression convex portion 82. A row 11 of heat-sealed portions of the paper 10 is formed.

Furthermore, as shown in FIG. 13, the width of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 of the second heat seal roller 80 is equal to the width of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat seal roller 70. The width is set to be larger than the width by a certain dimension, and the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 and the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 are opposed to each other (the thickness of the thermal bonding portion 11 of the laminated paper 10 When the thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 72 are arranged in substantially close contact with each other with a gap of 100 mm, the widthwise ends of the thermocompression bonding surfaces 82a of the thermocompression bonding protrusions 82 are respectively on both sides of the thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 82 in the width direction. A constant width portion is exposed. As a result, the crepe paper 1 of the pre-heat-sealing laminated paper 10X is heat-sealed and heat-sealed to the non-woven fabric 2 between the heat-sealed surface 72a of the heat-sealed projection 72 and the heat-sealed surface 82a of the heat-sealed projection 82. When this is done, both widthwise edges of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 are arranged on the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82, and the thermocompression bonding surface of the thermocompression bonding convex portion 72 is placed on the thermocompression bonding surface 82a. It is possible to greatly reduce the external force (especially shear force) applied to the pre-heat-sealing laminated paper sheets 10X from both edges in the width direction of 72a. That is, if the width of the thermocompression-bonding surface 72a of the thermocompression-bonding protrusion 72 and the width of the thermocompression-bonding surface 82a of the thermocompression-bonding protrusion 82 are set to be the same width, the thermocompression-bonding surface 72a of the thermocompression-bonding protrusion 72 and the thermocompression bonding surface 72a of the thermocompression bonding protrusion 72 have the same width. When the crepe paper 1 of the pre-heat-sealing laminated paper 10X is heat-sealed and heat-sealed to the non-woven fabric 2 between the heat-sealing protrusions 82 and the heat-pressing surfaces 82a of the heat-sealing protrusions 82, the heat-pressing surfaces 72a of the heat-sealing protrusions 72 Both edges in the width direction are arranged at the same position as both edges in the width direction of the thermocompression bonding surface 82a of the thermocompression bonding protrusion 82. Since the external force (particularly shear force) applied to the pre-fusing laminated paper 10X increases, there is a possibility that part of the pre-fusing laminated paper 10X (particularly the crepe paper 1) may be cut or damaged. However, as shown in FIG. By setting the width to be larger than the width by a certain dimension, such a problem can be reliably prevented. On both sides in the width direction of the thermocompression bonding surface 82a of the thermocompression bonding protrusion 82 of the second heat seal roller 80, a pair of side surfaces 82b are inclined at a predetermined angle (obtuse angle) with respect to the thermocompression bonding surface 82a. at an angle). As described above, in the laminated paper manufacturing apparatus, the heat-pressing surfaces 72a, 82a of the heat-sealing protrusions 72, 82 are more susceptible to the heat of the lower heat-sealing roller 80 than the heat-sealing surface 72a of the heat-sealing roller 70, which is the upper side. The pressing surface 80 is widened, and the corners of both widthwise edges of the heat-sealing protrusions 92 of the lower heat-sealing roller 80 are cut (notched) to form a tapered (chamfered) or rounded shape. A cut shape such as (curved chamfered shape) is preferable.

[Roller length and roller diameter]
The roller length L of the heat seal rollers 70, 80 is preferably in the range of 1200 mm to 1500 mm. If the roller diameter D of the heat seal rollers 70 and 80 is less than 1200 mm, the productivity may decrease. On the other hand, if the roller length L of the heat seal rollers 70, 80 exceeds 1500 mm, there is a possibility that the problem of the crown phenomenon, which will be described later, will occur. Also, the roller diameter D of the heat seal rollers 70, 80 is preferably in the range of 180 mm to 300 mm. If the roller diameter D of the heat seal rollers 70 and 80 is set to a value less than 180 mm, there is a possibility that the pressing force of the heat-sealing protrusions 72 and 82 on the heat-sealed portions of the pre-heat-sealed laminated sheets 10X may be insufficient. On the other hand, if the roller diameter D of the heat seal rollers 70, 80 exceeds 300 mm, the problem of high cost occurs.

[Relationship between heat seal roller diameter, roller length, and pressing force during thermocompression bonding]
In the heat-sealing operation of the pre-heat-sealing laminated paper 10X by the heat-sealing rollers 70 and 80, the roller diameter D and the roller length L of the heat-sealing rollers 70 and 80 cause the heat-sealing protrusions 72 and 82 to move from the pre-heat-sealing laminated paper 10X. The present inventors have found that the pressing force applied to the heat-sealed portion of the paper 10X changes. In addition, the present inventor applies heat from the thermal compression protrusions 72 and 82 to the heat-sealed portion of the pre-heat-sealing laminated paper 10X in the heat-sealing operation of the pre-heat-sealing laminated paper 10X by the heat seal rollers 70 and 80. The pressing force (hereinafter referred to as "pressing force during thermocompression bonding") is set to , at least 2 to 3 atm or more. Further, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, it is preferable that the pressing force at the time of thermocompression bonding is within the range of 5.5 to 7.0 atmospheres. That is, when the roller length L of the heat-sealing rollers 70, 80 is 1400 mm, the pre-heat-sealing laminated paper 10X has sufficient durability up to a pressure of 5 to 7 atmospheres during the heat-sealing by the heat-sealing rollers 70, 80. Therefore, this range is optimum for the pressing force during the thermocompression bonding. If the pressing force during thermocompression bonding is 7 atmospheres or more, the pre-thermal bonding laminated paper 10X may be damaged (for example, a portion corresponding to the corner portion of the thermocompression bonding surface 72a of the thermocompression convex portion 72 may be torn). have a nature.

Further, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, if the pressing force during thermocompression bonding is 7 atmospheres or more, the so-called crown phenomenon occurs in the heat seal rollers 70 and 80 (the diameter of the heat seal rollers 70 and 80 increases). There is also a possibility that a phenomenon in which a gap is formed between the heat seal rollers 70 and 80 due to bending in the direction may occur. When this crown phenomenon occurs, the heat-sealing rollers 70 and 80 are curved in the radial direction, and a drum-shaped gap is generated between the heat-sealing rollers 70 and 80 when viewed from the front. In this case, the gap between the heat seal rollers 70 and 80 in the radial direction is very small. gap will occur. Therefore, although the gap between the heat-sealing rollers 70 and 80 due to this crown phenomenon is a minute gap of 1 mm or less, since the thickness of the laminated paper raw material sheet (laminated paper 10X before heat-sealing) is as thin as 1 mm or less, heat sealing is possible. The thermal compression surfaces 72a, 82a of the rollers 70, 80 may be in a state of floating from the pre-thermally-sealed laminated paper 10X, and a gap may be generated between them. The heat-sealed portions of the pre-heat-sealed laminated sheets 10X cannot be pressure-bonded by the pressure-bonding surfaces 72a and 82a.

Therefore, in order to avoid such a problem of the crown phenomenon, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, the pressing force during thermocompression bonding should be 5.5 to 7.0 mm as described above. It is preferably within the atmospheric pressure range. When the roller length L of the heat seal rollers 70 and 80 is set to 1400 mm and the pressing force at the time of thermocompression bonding is set to less than 5.5 atmospheres, the convex portions 72 and 82 thermally bond the laminated paper sheet 10X before heat fusion. There is a possibility that the part cannot be formed stably (that is, the adhesion strength of the heat-sealed part may be insufficient). On the other hand, when the roller length L of the heat seal rollers 70 and 80 is set to 1400 mm, if the pressing force at the time of thermocompression bonding exceeds 7 atmospheres, excessive pressure will be applied to the heat-sealed portion of the pre-heat-sealed laminated paper 10X. In addition, the heat-sealed portion may harden during adhesion. Further, when the roller length L of the heat seal rollers 70 and 80 is set to 1200 mm, the pressing force during thermocompression bonding can be set to 4.5 atmospheres. Further, when the roller length L of the heat seal rollers 70 and 80 is set to 1500 mm, the pressing force at the time of thermocompression may be in the range of 7.5 to 8.0 atmospheres. When the roller length L of the heat seal rollers 70 and 80 is set to 1500 mm and the pressing force at the time of thermal compression bonding is less than 7.5 atmospheres, the thermal compression protrusions 72 and 82 thermally bond the laminated sheets 10X before thermal bonding. There is a possibility that the part cannot be formed stably (that is, the adhesion strength of the heat-sealed part may be insufficient). On the other hand, when the roller length L of the heat seal rollers 70 and 80 is set to 1500 mm, if the pressing force at the time of heat-sealing exceeds 8 atm, excessive pressure will be applied to the heat-sealed portion of the pre-heat-sealed laminated paper 10X. In addition, the heat-sealed portion may harden during adhesion.

[Temperature control of heat seal roller]
In the laminated paper manufacturing apparatus, the crepe paper as the outer layer sheet and the intermediate layer sheet (non-woven fabric, impermeable sheet, etc.) are reliably heat-sealed at the heat-sealed portion of the pre-heat-sealed laminated paper 10X. The temperature of the seal rollers 70 and 80 during thermocompression bonding (hereinafter referred to as “thermocompression temperature”) is set within the range of 175 to 200° C., and the temperature distribution is in the lengthwise direction of the heat seal rollers 70 and 80. It is preferable to control the temperature so that it is constant throughout. When the heat-sealing rollers 70 and 80 have a heat-sealing temperature of 175° C. or less, the crepe paper and the non-woven fabric cannot be reliably heat-sealed at the heat-sealed portion of the laminated paper before heat-sealing 10X. On the other hand, if the thermocompression bonding temperature is 200°C or higher, the heat-adhesive resin (PP (polypropylene), PE (polyethylene), etc.) of the intermediate layer sheet may harden and deteriorate, or the intermediate layer sheet itself such as a non-woven fabric may harden and heat. There is a possibility that the fusible fibrous material (heat-fusible synthetic resin fiber) will not exhibit the fusing function (that is, it will not be possible to bond the crepe paper by fusing). Further, as shown in FIG. 15(a), the heat-sealing temperature of the heat-sealing rollers 70, 80 varies depending on the rotation speed of the heat-sealing rollers 70, 80 (that is, the supply speed of the pre-heat-sealing laminated paper 10X, in other words, , the forming speed in the lengthwise direction of the heat-sealed portion), the temperature control and rotation control of the heat seal rollers 70 and 80 are preferably performed in the laminated paper manufacturing apparatus.

[Rotation control of heat seal roller]
In the laminated paper manufacturing apparatus, the crepe paper as the outer layer sheet and the intermediate layer sheet (non-woven fabric, impermeable sheet, etc.) are reliably heat-sealed at the heat-sealed portion of the pre-heat-sealed laminated paper 10X. After the seal rollers 70 and 80 reach the thermocompression bonding temperature within the above set range, the heat seal rollers 70 and 80 are started to rotate to form the heat-sealed portion of the pre-heat-sealed laminated paper 10X. do. In addition, the heat-sealing rollers 70, 80 are controlled so that the heat-sealing temperature is constant within the above set range. It is preferable to control by increasing or decreasing according to the thickness of the paper 10X). That is, as shown in FIG. 15(c), the rotational speed of the heat seal rollers 70 and 80 is increased or decreased in proportion to the thickness (base paper thickness) of the pre-heat-sealed laminated paper 10X in the laminated paper manufacturing apparatus. It is preferable to control the rotation of the heat seal rollers 70 and 80 . Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is kept constant, and the rotational speed of the heat seal rollers 70 and 80 (feed speed of the original paper) is increased or decreased according to the thickness of the original paper. Similarly, as shown in FIG. 15(d), the rotational speed of the heat-sealing rollers 70 and 80 is increased or decreased in proportion to the thickness (thickness of the nonwoven fabric) of the nonwoven material sheet of the pre-heat-sealing laminated paper 10X. Rotation control of the heat seal rollers 70 and 80 can also be performed in the paper manufacturing apparatus. Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is kept constant, and the rotation speed (feed speed of the base paper) of the heat seal rollers 70 and 80 is increased or decreased according to the thickness of the nonwoven fabric. Furthermore, as shown in FIG. 15(b), the heat-sealing rollers 70 and 80 are heated so that the temperature of the heat-sealing rollers 70 and 80 increases or decreases in proportion to the thickness of the non-woven fabric of the pre-heat-sealing laminated paper 10X (thickness of the non-woven fabric). Temperature control of the heat seal rollers 70 and 80 can also be performed in the manufacturing equipment. Also in this case, the rotation speed of the heat seal rollers 70, 80 is kept constant, and the thermocompression bonding temperature of the heat seal rollers 70, 80 is increased or decreased according to the thickness of the nonwoven fabric. Here, the heat-sealing speed (the length per unit time of the heat-sealed portion row formed on the pre-heat-sealed laminated paper sheet 10X) by the heat-sealing roller is preferably 20 m/min, for example.

[Uniform temperature control]
As described above, the laminated paper manufacturing apparatus controls the heat-sealing temperature of the heat-sealing rollers 70 and 80 so that the heat-sealing rollers 70 and 80 have a uniform temperature distribution, and the heat-sealing portion As a configuration for this temperature control, the configuration shown in FIG. 12 can be adopted. Specifically, as shown in FIG. 11, the heat seal rollers 70 and 80 each have a cylindrical shape with both ends closed by a peripheral wall and a pair of side walls 73 and 83. As a result, as shown in FIG. In addition, sealed spaces 70S and 80S are formed inside the heat seal rollers 70 and 80, respectively. The internal spaces 70S, 80S of the heat seal rollers 70, 80 are closed spaces maintained in a vacuum state. In the laminated paper manufacturing apparatus, the internal spaces 70S and 80S of the heat seal rollers 70 and 80 are connected to external water supply means, respectively, and the internal spaces 70S and 70S of the heat seal rollers 70 and 80 are supplied from the water supply means. Moisture is supplied to each of the heat seal rollers 70 and 80S, and when the heat seal rollers 70 and 80 are heated, steam obtained by heating the moisture is used to keep the temperature of the heat seal rollers 70 and 80 constant. It's becoming For example, in the laminated paper manufacturing apparatus, a predetermined amount of water is stored in advance in the internal spaces 70S and 80S of the heat seal rollers 70 and 80, and the water is heated when the heat seal rollers 70 and 80 are heated. The obtained steam is used to keep the temperature of the heat-sealing rollers 70, 80 constant, or when the heat-sealing rollers 70, 80 are in operation, saturated steam or superheated steam is supplied to the internal spaces 70S, 80S. Then, the steam is used to keep the temperature of the heat seal rollers 70 and 80 constant. In this case, high-temperature steam (for example, saturated steam) is applied to the inner surfaces of the heat seal rollers 70 and 80 in a thin layer or film, and the layer or film of steam causes the entire heat seal rollers 70 and 80 to become wet. It is designed to maintain a uniform temperature. Then, in the laminated paper manufacturing apparatus, the heat seal rollers 70 and 80 are heated by a predetermined heating means to raise the temperature to the above-described thermocompression bonding temperature before the heat seal rollers 70 and 80 start the thermocompression bonding operation. For example, in a laminated paper manufacturing apparatus, an induction coil is wound inside the heat seal rollers 70 and 80, and an alternating current is output to the induction coil to induce and generate an eddy current in the heat seal rollers 70 and 80. Thus, the heat seal roller is heated to the predetermined thermocompression bonding temperature by Joule heat generation, and controlled to keep the predetermined temperature constant. Then, in addition to the induction heating by the induction heating means, the temperature stabilization operation by the water vapor causes the heat seal rollers 70 and 80 to be heated over the entire circumferential direction and the entire length direction (in particular, all the Control is performed so that the predetermined thermocompression bonding temperature is maintained uniformly and evenly over the entire surface of the thermocompression bonding surfaces 72a, 82a of the thermocompression bonding protrusions 72, 82. FIG. Thereby, the temperature distribution of the thermocompression bonding surfaces 72a, 82a of the thermocompression bonding protrusions 72, 83 of the heat seal rollers 70, 80 is maintained absolutely the same (uniform) over the entire surface. The heating means (heating heaters) of the heat seal rollers 70 and 80 preferably have the electric structure as described above (for example, an induction heating structure such as the induction heating means). By doing so, it is possible to avoid the risk of oil leakage as in the case where the heating means is of the oil heater type. can contribute to the stabilization of

In addition, in the laminated paper manufacturing apparatus, the pressing force of the heat seal rollers 70 and 80 at the time of thermocompression bonding is particularly set to It is controlled to be constant over the entire surface of the opposing surface. In this manner, the laminated paper manufacturing apparatus preferably controls the temperature distribution of the heat seal rollers 70 and 80 and the pressure distribution at the same time. It is possible to minimize adhesion unevenness in each of the heat-sealed portions 11a and 11b.

[Method for producing laminated paper]
The laminated paper of the present invention, including the invention of the laminated paper 10 of Embodiments 1 to 3, is preferably manufactured by the laminated paper manufacturing method described below. Note that the laminated paper manufacturing apparatus of Embodiment 5 can be suitably used for this laminated paper manufacturing method.

Embodiment 6 (Another Example of Laminated Paper Manufacturing Apparatus)
In the laminated paper manufacturing apparatus of Embodiment 5, a pair of heat seal rollers 70 and 80 are used as means for forming the heat-sealed portion rows 11 of the laminated paper 10 (hereinafter referred to as "heat-sealing means"). However, as a heat-sealing means for forming the heat-sealed portion row 11 of the laminated paper 10, besides this structure, high-frequency welding or ultrasonic welding can be used to bond crepe paper. It is possible to employ a configuration in which the intermediate layer sheet such as a non-woven fabric is adhered (by the fusion bonding operation of the heat-sealing component of the intermediate layer sheet). According to these heat-sealing means using high-frequency welding or ultrasonic welding, it is easy to adjust the bonding temperature by heat-sealing, there is a wide variety of materials, and the thermoplastic resin film sheet with a low melting point is inexpensive. materials may be available. For example, in the laminated paper manufacturing apparatus shown in FIG. 16, the heat-sealing means is provided with a high-frequency sewing machine as a high-frequency welding means. The laminated paper manufacturing apparatus of the sixth embodiment is basically the same except that the pair of heat seal rollers 70 and 80 of the laminated paper manufacturing apparatus of the fifth embodiment shown in FIG. has the same configuration as the laminated paper manufacturing apparatus of Embodiment 5, and has a three-layer structure (three-ply structure) in which a nonwoven fabric 2 is interposed between a pair of crepe papers 1 before heat-sealing lamination The paper 10X is guided and fed to the high-frequency sewing machine 100 by the guide rollers 61 and 62, and the high-frequency sewing machine 100 forms the heat-sealed section row 11 at a predetermined position of the heat-sealing laminated paper 10. After fusion bonding, the laminated paper 10Y is guided by the guide rollers 63 and 64 and wound around the take-up roller 55. As shown in FIG.

[High frequency sewing machine]
A high-frequency sewing machine 100 has a first fusing roller 101 and a second fusing roller 102 arranged opposite to each other. 10X is sandwiched and high-frequency welding is performed to form the heat-sealed portion row 11 . At this time, the high-frequency current (for thermal welding) applied to the first fusing roller 101 and the second fusing roller 102 is as described in the laminated paper manufacturing apparatus and laminated paper manufacturing method of the fifth embodiment. In addition, it is preferable to perform various controls so that the temperature is kept constant according to various conditions such as the thickness of the base paper and the thickness of the nonwoven fabric.

[Another aspect of the present invention]
The present invention can also be grasped as the invention of the laminated paper, the method for producing the laminated paper, or the apparatus for producing the laminated paper described below.

First, the laminated paper according to the first aspect of the present invention comprises crepe paper as a pair of outer layer sheets, and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers, The crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction orthogonal to the direction in which the crepe creases of the crepe paper extend to form a laminated structure. Further, in the laminated paper of the present invention, a printed portion is provided on the inner surface of the intermediate layer sheet or the crepe paper, and the thickness of the crepe paper is adjusted so that the printed portion is the crepe paper when the crepe paper is in a wet state. The thickness is set so that it can be visually recognized from the outside through the paper.

A method for producing a laminated paper according to a second aspect of the present invention is the method for producing a laminated paper according to claim 1, wherein the intermediate layer sheet is made of nonwoven fabric, and the nonwoven fabric raw material sheet, which is the raw material sheet of the nonwoven fabric, is produced. In order to compensate for the shrinkage of the printing part during printing, a nonwoven raw material sheet having a width larger than the width of the laminated paper to be actually obtained by a predetermined ratio is used according to the shrinkage rate.

A laminated paper manufacturing apparatus according to a third aspect of the present invention is the laminated paper manufacturing apparatus according to the first aspect, wherein a pair of first and second A heat-sealing roller is provided, and the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion, and the peripheral surface of the thermocompression-bonding convex portion is used as a thermocompression-bonding surface, The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing. The width of the thermocompression bonding surface of the thermocompression bonding surface of the thermocompression bonding surface of the second heat seal roller is equal to the width of the thermocompression bonding surface of the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat seal roller. The width is set to be larger than the width by a certain dimension.

In another aspect, the laminated paper of the present invention comprises crepe paper as a pair of outer layer sheets, and a heat-fusible intermediate layer sheet disposed between the crepe papers in a laminated state, wherein the crepe The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the paper extend to form a laminated structure, and one crepe paper as the outer layer sheet. A printed portion is provided on the surface of the intermediate layer sheet facing the crepe paper, and the thickness of the crepe paper is measured by the printed portion provided on the surface of the intermediate layer sheet when the crepe paper is in a wet state. The thickness is set so that it can be seen from the outside, and even when the crepe paper is dry, the printed portion provided on the intermediate layer sheet can be seen from the outside through the crepe paper, and when the crepe paper contains water, the The crepe paper is such that the transparency of the printed portion provided on the intermediate layer sheet from the crepe increases, and the visibility of the printed portion provided on the intermediate layer sheet from the outside through the crepe paper increases. Among them, at least the thickness of the crepe paper on the side of the intermediate layer sheet on which the printed portion is provided is set. The laminated paper of the present invention comprises crepe paper as a pair of outer layer sheets and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the extending direction of the crepe paper to form a laminated structure, and the intermediate layer sheet or the crepe paper A printed portion may be provided on the inner surface, and the thickness of the crepe paper may be set so that the printed portion can be visually recognized from the outside through the crepe paper when the crepe paper is in a wet state. can.

A method for producing laminated paper according to another aspect of the present invention is the method for producing laminated paper according to the above aspect, wherein the intermediate layer sheet is made of nonwoven fabric, and the nonwoven fabric has an outer sheath made of polyethylene and an inner side made of polyethylene. A non-water-absorbent air-through nonwoven fabric manufactured by bonding core-sheath structure conjugate fibers whose core is polyethylene terephthalate without using an adhesive by an air-through method, and the printing unit uses a printing method Using flexographic printing technology as a printing ink, forming using water-based ink or ultraviolet curable ink as printing ink, and compensating for shrinkage during printing of the printed part on the nonwoven raw material sheet, which is the raw material sheet of the nonwoven fabric , according to the shrinkage ratio, the printed portion is printed on the nonwoven fabric using a nonwoven fabric raw material sheet having a width that is larger than the width of the laminated paper to be actually obtained by a predetermined ratio. In the method for producing a laminated paper of the present invention, the intermediate layer sheet is made of a nonwoven fabric, and in order to compensate for the shrinkage of the nonwoven fabric raw material sheet, which is the raw material sheet of the nonwoven fabric, when the printing part is printed, the shrinkage rate is Accordingly, it is also possible to use a nonwoven raw material sheet having a width that is larger than the width of the laminated paper to be actually obtained by a predetermined ratio.

A laminated paper manufacturing apparatus according to another aspect of the present invention is the laminated paper manufacturing apparatus according to the above-described another aspect, wherein the paired first and second heats for forming the rows of heat-sealed portions are provided. A sealing roller is provided, and the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion, and the peripheral surface of the thermocompression-bonding convex portion is used as a thermocompression-bonding surface, and the first heat-sealing roller The heat seal roller No. 2 has a ridge-shaped thermocompression bonding convex portion facing the thermocompression bonding convex portion of the first heat seal roller, and the peripheral surface of the thermocompression bonding convex portion is attached to the first heat seal roller. and the width of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller is the width of the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat seal roller It is set to a width that is larger than the width by a certain dimension.

Alternatively, the present invention can also be grasped as an invention of a laminated paper, a laminated paper manufacturing method, or a laminated paper manufacturing apparatus described below.

First, the present invention comprises crepe paper as a pair of outer layer sheets, and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend. The crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by a linear heat-sealed portion row extending in a direction orthogonal to the intermediate layer sheet, or a printed portion is formed on the inner surface of the crepe paper. and the thickness of the crepe paper is set to a thickness such that the printing unit can be visually recognized from the outside through the crepe paper when the crepe paper is in a wet state. can also

Further, in the above invention, the intermediate layer sheet is made of a material that can print the printed portion, and a material that can be bonded by heat-sealing crepe paper as the outer layer sheet at the heat-sealing portion row. and the printed portion is provided on the surface of the nonwoven fabric facing one crepe paper as the outer layer sheet.

Further, the above invention can also be understood as a laminated paper characterized in that the printing portion is provided on the inner surface of one crepe paper as the outer layer sheet.

Further, in the above invention, the intermediate layer sheet is made of a non-permeable sheet made of synthetic resin that blocks permeation of moisture and/or oil, and the printing part is provided on the non-permeable sheet as the intermediate layer sheet. It can also be grasped as a laminated paper characterized by being

The above invention can also be grasped as a laminated paper characterized in that the nonwoven fabric has a basis weight and a thickness within the range of 15 to 25 g/m ² .

The above invention can also be understood as a laminated paper characterized in that the crepe paper has a thickness within the range of 20 to 50 g/m ² .

Further, in the above invention, the widthwise heat-sealed portion interval, which is the space between the widthwise center lines of the adjacent heat-sealed portion rows, is set within a predetermined range according to the range of the crepe rate of the crepe paper. When the crepe rate of the crepe paper is set to an arbitrary value and the crepe ratio of the crepe paper is in the range of 20% to 26%, the widthwise heat-sealed portion interval is set in the range of 10 mm to 15 mm. When the crepe rate is in the range of 26% to 30%, the widthwise heat-sealed portion interval can be understood as a laminated paper characterized by being set in the range of 15 to 25 mm.

Further, the present invention is the method for producing a laminated paper according to the above invention, wherein the intermediate layer sheet is made of a nonwoven fabric, and the shrinkage of the nonwoven raw material sheet, which is the raw material sheet of the nonwoven fabric, is compensated for by the printing part during printing. Therefore, according to the shrinkage rate, it can be understood as a laminated paper manufacturing method characterized by using a nonwoven fabric raw material sheet having a width that is larger than the width of the laminated paper to be actually obtained by a predetermined ratio. .

Further, the present invention is a laminated paper manufacturing apparatus according to the above invention, comprising a pair of first and second heat seal rollers for forming the row of heat-sealed portions, wherein the first heat seal roller The roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion, and the peripheral surface of the thermocompression-bonding convex portion serves as a thermocompression-bonding surface. It has a ridge-shaped thermocompression bonding convex portion facing the thermocompression bonding convex portion of the heat seal roller, and the peripheral surface of the thermocompression bonding convex portion is used as a thermocompression bonding surface facing the thermocompression bonding surface of the first heat seal roller. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller by a fixed dimension. It can also be grasped as a laminated paper manufacturing apparatus characterized by

By the way, to explain the present invention according to another aspect, the laminated paper according to the first aspect of the present invention includes a pair of crepe papers as outer layer sheets and a layered state disposed between the pair of crepe papers. The crepe paper is made of a nonwoven fabric as a heat-fusible intermediate layer sheet, and the crepe paper is attached to the intermediate layer sheet by a linear heat-fusible section row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend. A laminated structure is formed by heat-sealing, the crepe rate of the crepe paper is set within the range of 20% to 30%, and the heat-sealed portion interval in the width direction of the heat-sealed portion rows is 10 mm to 25 mm. , and within the range of the widthwise distance between the heat-sealed parts, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper.

In addition, to explain the present invention according to another aspect, the laminated paper according to the second aspect of the present invention includes a pair of crepe papers as outer layer sheets, and a layered state disposed between the pair of crepe papers. The crepe paper is made of a nonwoven fabric as a heat-fusible intermediate layer sheet, and the crepe paper is attached to the intermediate layer sheet by a linear heat-fusible section row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend. When the crepe rate of the crepe paper is in the range of 20% to 26%, the heat-sealed portion interval in the width direction of the heat-sealed portion rows is in the range of 10 mm to 15 mm. and when the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm, and Within the range of the distance between the heat-sealed portions in the width direction, the distance between the heat-sealed portions in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

The laminated paper of the present invention can be suitably applied to the use of wet paper towel products by the method for producing laminated paper and the apparatus for producing laminated paper. It can be applied to wet paper products such as double-folded paper towels, but in addition to this, it is also possible to commercialize the roll-shaped base paper as it is and use it as the base paper for automatic wet paper towel manufacturing machines. In addition to products, it can also be applied to sanitary goods and the like used for purposes such as care and nursing.

1: crepe paper, 2: non-woven fabric (heat-fusible sheet)
10, 40, 50, 60, 70, 80: laminated paper 11, 12, 41, 42, 51, 61, 82: heat-sealed portions 11a, 12a, 41a, 42a, 51a, 61a, 82a: long point 11b, 12b, 41b, 42b, 51b, 61b, 82b: non-fused portion 30: second heat seal roller (heat seal roller)
31: First heat seal portion (heat seal portion)
32: Second heat seal portion (heat seal portion)
31a, 32a: pressing projections, 31b, 32b: non-pressing portions

TECHNICAL FIELD The present invention relates to a product obtained by processing laminated paper, a laminated paper manufacturing apparatus, a heat seal roller of the laminated paper manufacturing apparatus, and a method for manufacturing laminated paper.

As inventions related to laminated paper that can be used for conventional wet paper towels, there are inventions according to Patent Document 1 and Patent Document 2, which are inventions or ideas of the present inventors. In these inventions, a moisture-absorbent paper having crepe and a heat-fusible sheet (hygroscopic paper or non-woven fabric mixed with synthetic fibers) are laminated, and the heat setting part or the heat is applied so as to extend in a direction substantially orthogonal to the crepe of the moisture-absorbent paper. A seal portion is formed and heat-sealed to integrate them. These inventions can provide a laminated paper that is comfortable to the touch, has an excellent appearance and a feeling of use, and can heat-seal the laminated paper at a low temperature, which facilitates processing and reduces manufacturing costs. can be reduced.

In addition, as inventions of the present inventors that further improve the conventional laminated paper having the above-mentioned excellent effects, there are the inventions described in Patent Document 3 and Patent Document 4. These inventions, in particular, greatly improve the fusion strength of the heat-sealed portions of the crepe paper and the heat-fusible sheet, and provide a laminated paper by increasing the overall volume feeling and further improving the appearance. be able to. That is, the laminated paper according to these inventions can obtain a sufficient fusion bonding strength even if the fusion bonding area is reduced, and can increase the overall volume feeling.

Japanese Patent Publication No. 4-24480 Japanese Utility Model Publication No. 4-15116 JP-A-11-342090 JP-A-2003-39581

In any of the inventions of Patent Documents 1 to 4, when the laminated paper is embodied in a paper towel or the like, the texture, appearance, and feeling of use can be greatly improved, and the laminated paper is constructed. The strength of the bond between the hygroscopic paper and the heat-fusible sheet can be greatly improved, and the volume of the entire product can be greatly increased. It brings great advantages as On the other hand, the inventor of the present invention imparts a higher value-added function to conventional laminated paper in the process of processing laminated paper as a raw material into final products such as wet paper towels, or at the stage after processing. In addition, we searched for a new laminated paper that can dramatically improve the performance as a laminated paper and a method for producing the same. Then, the inventor of the present invention has such a high-value-added function and has achieved a dramatic improvement in performance over conventional laminated paper, a manufacturing method for producing the laminated paper, and the laminated paper. As a result of continuous research and development of a manufacturing apparatus for manufacturing or a manufacturing apparatus used in the manufacturing method and repeated trial and error, the present invention was achieved.

That is, the present invention provides a product obtained by processing laminated paper having a high value-added function and dramatically improved performance compared to conventional products, an apparatus for producing such laminated paper, and a heat device for producing such laminated paper. An object of the present invention is to provide a sealing roller and a method for manufacturing such laminated paper.

In the product obtained by processing the laminated paper according to the first aspect of the present invention, the laminated paper comprises a pair of crepe papers as outer layer sheets, and a heat treatment layer disposed between the pair of crepe papers in a laminated state. and a nonwoven fabric as a fusible intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, the crepe rate of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion interval in the width direction of the heat-sealed portion row is in the range of 10 mm to 25 mm. set within. Further, in the laminated paper, the distance between the heat-sealed portions in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the distance between the heat-sealed portions in the width direction.

In the product obtained by processing the laminated paper according to the second aspect of the present invention, the laminated paper comprises a pair of crepe papers as outer layer sheets, and a heat roller disposed between the pair of crepe papers in a laminated state. and a nonwoven fabric as a fusible intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, when the crepe rate of the crepe paper is within the range of 20% to 26%, the widthwise distance between the heat-sealed portions of the heat-sealed portion row is set within the range of 10 mm to 15 mm. When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set in the range of 15 to 25 mm. Further, in the laminated paper, the distance between the heat-sealed portions in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the distance between the heat-sealed portions in the width direction.

In the laminated paper manufacturing apparatus according to the third aspect of the present invention, the laminated paper includes a pair of crepe papers as outer layer sheets, and a heat-fusible sheet disposed between the pair of crepe papers in a laminated state. and a nonwoven fabric as an intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, when the crepe rate of the crepe paper is within the range of 20% to 26%, the widthwise distance between the heat-sealed portions of the heat-sealed portion row is set within the range of 10 mm to 15 mm. When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm, and the width direction Within the range of the distance between the heat-sealed parts, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper. The laminated paper manufacturing apparatus includes a pair of first and second heat seal rollers for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller.

In the heat seal roller of the laminated paper manufacturing apparatus according to the fourth aspect of the present invention, the laminated paper is arranged in a laminated state between a pair of crepe papers as outer layer sheets and the pair of crepe papers. Nonwoven fabric as a heat-sealable intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, the crepe rate of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion interval in the width direction of the heat-sealed portion row is set in the range of 10 mm to 25 mm. Within the range of the widthwise distance between the heat-sealed parts, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper. The heat seal rollers of the laminated paper manufacturing apparatus are provided with first and second heat seal rollers forming a pair for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller.

In the heat seal roller of the laminated paper manufacturing apparatus according to the fifth aspect of the present invention, the laminated paper is arranged in a laminated state between a pair of crepe papers as outer layer sheets and the pair of crepe papers. Nonwoven fabric as a heat-sealable intermediate layer sheet. The laminated paper has a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction perpendicular to the direction in which the crepe creases of the crepe paper extend. Further, in the laminated paper, when the crepe rate of the crepe paper is within the range of 20% to 26%, the widthwise distance between the heat-sealed portions of the heat-sealed portion row is set within the range of 10 mm to 15 mm. When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm, and the width direction Within the range of the distance between the heat-sealed parts, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper. The heat-sealing rollers of the laminated paper manufacturing apparatus are provided with first and second heat-sealing rollers forming a pair for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller.

The heat-sealing roller of the laminated paper manufacturing apparatus according to the sixth aspect of the present invention comprises a first heat-sealing roller and a second heat-sealing roller paired for forming the row of heat-sealed portions. there is The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the seal roller. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger by a certain dimension than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller, and When the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat-sealing roller and the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat-sealing roller are arranged facing each other in a substantially close contact state, the first heat-sealing roller On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat seal roller, the constant width portions at both widthwise end portions of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller are exposed. It's becoming On both sides in the width direction of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller, a pair of side surfaces extend obliquely at a predetermined obtuse angle with respect to the thermocompression bonding surface.

A laminated paper manufacturing apparatus according to a seventh aspect of the present invention includes crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the seal roller. Further, in the laminated paper manufacturing apparatus, the roller lengths of the first heat-sealing roller and the second heat-sealing roller are set within a range of 1200 mm to 1500 mm. Roller diameters of the first heat-sealing roller and the second heat-sealing roller are set within a range of 180 mm to 300 mm. The pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, can be freely set to a value of 2 atmospheres or more.

An apparatus for producing laminated paper according to an eighth aspect of the present invention comprises crepe paper as a pair of outer layer sheets, and heat-sealable intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Further, in the laminated paper manufacturing apparatus, the pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, is set by the first heat seal roller and the first heat seal roller. When the roller length of the heat seal roller of No. 2 is 1400 mm, it can be freely set within the range of 5.5 to 7.0 atmospheres, and when the roller length of the first heat seal roller and the second heat seal roller is 1500 mm , 7.5 to 8.0 atm.

A laminated paper manufacturing apparatus according to a ninth aspect of the present invention comprises crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the seal roller. Furthermore, in the laminated paper manufacturing apparatus, the thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, can be freely set within a range of 175 to 200°C. there is temperature control of the first heat-seal roller and the second heat-seal roller so that the thermocompression bonding temperature increases or decreases in proportion to the rotation speed of the first heat-seal roller and the second heat-seal roller; Rotation can be freely controlled.

A laminated paper manufacturing apparatus according to a tenth aspect of the present invention comprises crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Furthermore, the laminated paper manufacturing apparatus maintains a constant thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, and The first heat-sealing roller and the second heat-sealing roller are arranged in accordance with the thickness of the base paper so that the rotation speed of the second heat-sealing roller increases or decreases in proportion to the thickness of the base paper, which is the thickness of the laminated paper before heat-sealing. Rotation can be freely controlled by increasing or decreasing the rotational speed of the motor.

An apparatus for manufacturing laminated paper according to an eleventh aspect of the present invention includes crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Furthermore, the laminated paper manufacturing apparatus maintains a constant thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, and The first heat-sealing roller and the second heat-sealing roller increase or decrease in proportion to the thickness of the non-woven fabric, which is the thickness of the non-woven fabric raw material sheet of the laminated paper before heat-sealing, so that the rotation speed of the second heat-sealing roller increases or decreases in proportion to the thickness of the non-woven fabric. The rotation speed of the heat seal roller can be increased or decreased to freely control the rotation.

A laminated paper manufacturing apparatus according to a twelfth aspect of the present invention includes crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the seal roller. Further, the laminated paper manufacturing apparatus maintains constant rotational speeds of the first heat-sealing roller and the second heat-sealing roller, and heats the first heat-sealing roller and the second heat-sealing roller. The first heat seal roller and the second heat seal roller are arranged in accordance with the thickness of the nonwoven fabric so that the thermocompression temperature, which is the temperature at the time of pressure bonding, increases or decreases in proportion to the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat fusion. The temperature can be freely controlled by increasing or decreasing the thermocompression bonding temperature of the heat seal roller.

A laminated paper manufacturing apparatus according to a thirteenth aspect of the present invention includes crepe paper as a pair of outer layer sheets, and heat-fusible intermediate layer sheets disposed between the pair of crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Paper manufacturing equipment. The laminated paper manufacturing apparatus includes a pair of a first heat seal roller and a second heat seal roller for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. Furthermore, sealed spaces are formed inside the first heat-seal roller and the second heat-seal roller, respectively, and the internal spaces of the first heat-seal roller and the second heat-seal roller are: It is a closed space maintained in a vacuum state. In the laminated paper manufacturing apparatus, external water supply means is connected to the inner spaces of the first heat seal roller and the second heat seal roller, respectively, and the water supply means supplies water to the first heat seal roller. and second heat-sealing rollers, respectively, while supplying moisture to the interior spaces of the first heat-sealing roller and the second heat-sealing roller, and supplying high-temperature steam obtained by heating the moisture when heating the first heat-sealing roller and the second heat-sealing roller. It is attached to the inner surface of the first heat-seal roller and the second heat-seal roller so as to form a thin layer or film, and the first heat-seal roller and the second heat-seal are formed by the layer-like or film-like water vapor. The entire roller is maintained at a uniform temperature over the entire circumferential direction and the entire length direction of the first heat seal roller and the second heat seal roller, The thermocompression bonding temperature, which is the temperature at the time of thermocompression bonding of the first and second heat seal rollers, can be freely controlled to be maintained uniformly over the entire surface.

A laminated paper according to a fourteenth aspect of the present invention comprises a pair of crepe papers and a nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the paired crepe papers. , a laminated paper having a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, Laminated paper manufactured by paper manufacturing equipment. The manufacturing apparatus includes a first heat-sealing roller and a second heat-sealing roller paired for forming the row of heat-sealed portions. The first heat-sealing roller has ridge-like thermocompression-bonding protrusions corresponding to the heat-bonding section arrays, and the peripheral surface of the thermocompression-bonding protrusions serves as a thermocompression-bonding surface. The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. It is a thermocompression bonding surface facing the thermocompression bonding surface of the sealing roller. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger by a certain dimension than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller, and When the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat-sealing roller and the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat-sealing roller are arranged facing each other in a substantially close contact state, the first heat-sealing roller On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat seal roller, the constant width portions at both widthwise end portions of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller are exposed. It's becoming On both sides in the width direction of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller, a pair of side surfaces extend obliquely at a predetermined obtuse angle with respect to the thermocompression bonding surface. The row of heat-sealed portions of the laminated paper is arranged such that the paired crepe paper and the intermediate layer sheet are bonded together by the heat-sealing projections of the first heat-sealing roller and the heat-sealing projections of the second heat-sealing roller. It is formed by thermocompression bonding between.

A laminated paper according to a fifteenth aspect of the present invention comprises a pair of crepe papers and a nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the paired crepe papers. , a laminated paper having a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, Laminated paper manufactured by a paper manufacturing method. The manufacturing method uses a laminated paper manufacturing apparatus having a first heat-sealing roller and a second heat-sealing roller paired to form the heat-sealed portion row. In the laminated paper manufacturing apparatus, the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the row of the heat-bonding portions, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface. and In the laminated paper manufacturing apparatus, the second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller. The peripheral surface is a thermocompression bonding surface facing the thermocompression bonding surface of the first heat seal roller. Furthermore, the roller lengths of the first heat-sealing roller and the second heat-sealing roller are set within a range of 1200 mm to 1500 mm, and the roller diameters of the first heat-sealing roller and the second heat-sealing roller are It is set within the range of 180 mm to 300 mm, and the pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, is set to a value of 2 atmospheres or more. there is The row of heat-sealed portions of the laminated paper is arranged such that the paired crepe paper and the intermediate layer sheet are bonded together by the heat-sealing projections of the first heat-sealing roller and the heat-sealing projections of the second heat-sealing roller. It is formed by thermocompression bonding between

A laminated paper according to a sixteenth aspect of the present invention comprises a pair of crepe papers and a nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the paired crepe papers. , a laminated paper having a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, Laminated paper manufactured by a paper manufacturing method. The manufacturing method uses a laminated paper manufacturing apparatus having a first heat-sealing roller and a second heat-sealing roller paired to form the heat-sealed portion row. In the laminated paper manufacturing apparatus, the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the row of the heat-bonding portions, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface. In the laminated paper manufacturing apparatus, the second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller. The peripheral surface of the portion is a thermocompression bonding surface facing the thermocompression bonding surface of the first heat seal roller. Furthermore, the pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, is the roller length of the first heat-sealing roller and the second heat-sealing roller. When is 1400 mm, it is set within the range of 5.5 to 7.0 atmospheres, and when the roller length of the first heat seal roller and the second heat seal roller is 1500 mm, 7.5 to 8.0 atmospheres is set within the range of The row of heat-sealed portions of the laminated paper is arranged such that the paired crepe paper and the intermediate layer sheet are bonded together by the heat-sealing projections of the first heat-sealing roller and the heat-sealing projections of the second heat-sealing roller. It is formed by thermocompression bonding between.

A laminated paper according to a seventeenth aspect of the present invention comprises a pair of crepe papers and a nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the paired crepe papers. , a laminated paper having a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, Laminated paper manufactured by a paper manufacturing method. The manufacturing method uses a laminated paper manufacturing apparatus having a first heat-sealing roller and a second heat-sealing roller paired to form the heat-sealed portion row. In the laminated paper manufacturing apparatus, the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the row of the heat-bonding portions, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface. In the laminated paper manufacturing apparatus, the second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller. The peripheral surface of the portion is a thermocompression bonding surface facing the thermocompression bonding surface of the first heat seal roller. Further, the thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, is set within a range of 175 to 200 ° C., and the thermocompression bonding temperature is set to the first heat seal temperature. The temperature control and rotation control of the first heat-sealing roller and the second heat-sealing roller are performed so as to increase or decrease in proportion to the rotation speed of the sealing roller and the second heat-sealing roller. The row of heat-sealed portions of the laminated paper is arranged such that the paired crepe paper and the intermediate layer sheet are bonded together by the heat-sealing projections of the first heat-sealing roller and the heat-sealing projections of the second heat-sealing roller. It is formed by thermocompression bonding between.

The laminated paper according to the eighteenth aspect of the present invention comprises a pair of crepe papers and a nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the paired crepe papers. , a laminated paper formed by heat-sealing the crepe paper to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, wherein Laminated paper manufactured by a paper manufacturing method. The manufacturing method uses a laminated paper manufacturing apparatus having a pair of a first heat-sealing roller and a second heat-sealing roller for forming the heat-sealed portion row, and the laminated paper manufacturing apparatus In the above, the first heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion corresponding to the heat-bonding section row, and the peripheral surface of the thermocompression-bonding protrusion is used as a thermocompression bonding surface. In the laminated paper manufacturing apparatus, the second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller. The peripheral surface is a thermocompression bonding surface facing the thermocompression bonding surface of the first heat seal roller. Further, the thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, is kept constant, and the rotation of the first heat seal roller and the second heat seal roller The rotational speeds of the first heat-sealing roller and the second heat-sealing roller are increased or decreased according to the thickness of the base paper so that the speed increases or decreases in proportion to the thickness of the base paper, which is the thickness of the laminated paper before heat-sealing. Rotation controlled. The row of heat-sealed portions of the laminated paper is arranged such that the paired crepe paper and the intermediate layer sheet are bonded together by the heat-sealing projections of the first heat-sealing roller and the heat-sealing projections of the second heat-sealing roller. It is formed by thermocompression bonding between

A laminated paper according to a nineteenth aspect of the present invention comprises a pair of crepe papers and a nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the paired crepe papers. , a laminated paper formed by heat-sealing the crepe paper to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, wherein Laminated paper manufactured by a paper manufacturing method. The manufacturing method uses a laminated paper manufacturing apparatus having a pair of a first heat-sealing roller and a second heat-sealing roller for forming the heat-sealed portion row, and the laminated paper manufacturing apparatus In the above, the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is used as a thermocompression-bonding surface, and the laminated paper In the manufacturing apparatus, the second heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion facing the thermocompression-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding convex portion The thermocompression bonding surface is opposed to the thermocompression bonding surface of the first heat seal roller. Further, the thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, is kept constant, and the rotation of the first heat seal roller and the second heat seal roller The rotational speeds of the first heat-sealing roller and the second heat-sealing roller are increased or decreased according to the thickness of the base paper so that the speed increases or decreases in proportion to the thickness of the base paper, which is the thickness of the laminated paper before heat-sealing. Rotation controlled. The row of heat-sealed portions of the laminated paper is arranged such that the paired crepe paper and the intermediate layer sheet are bonded together by the heat-sealing projections of the first heat-sealing roller and the heat-sealing projections of the second heat-sealing roller. It is formed by thermocompression bonding between

A laminated paper according to a twentieth aspect of the present invention comprises a pair of crepe papers and a nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the paired crepe papers. , a laminated paper having a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, Laminated paper manufactured by a paper manufacturing method. The manufacturing method uses a laminated paper manufacturing apparatus having a pair of a first heat-sealing roller and a second heat-sealing roller for forming the heat-sealed portion row, and the laminated paper manufacturing apparatus In the above, the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion serves as a thermocompression-bonding surface. In the laminated paper manufacturing apparatus, the second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller. The peripheral surface is a thermocompression bonding surface facing the thermocompression bonding surface of the first heat seal roller. Furthermore, the rotational speed of the first heat-seal roller and the second heat-seal roller is maintained constant, and the temperature at which the first heat-seal roller and the second heat-seal roller are thermo-compression bonded. The thermocompression bonding temperature of the first heat-sealing roller and the second heat-sealing roller according to the thickness of the nonwoven fabric so that the temperature increases or decreases in proportion to the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat-sealing. The temperature is controlled by increasing or decreasing the temperature. The row of heat-sealed portions of the laminated paper is arranged such that the paired crepe paper and the intermediate layer sheet are bonded together by the heat-sealing projections of the first heat-sealing roller and the heat-sealing projections of the second heat-sealing roller. It is formed by thermocompression bonding between.

A laminated paper according to a twenty-first aspect of the present invention comprises a pair of crepe papers and a nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the paired crepe papers. , a laminated paper having a laminated structure in which the crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, Laminated paper manufactured by a paper manufacturing method. The manufacturing method uses a laminated paper manufacturing apparatus having a first heat-sealing roller and a second heat-sealing roller paired to form the heat-sealed portion row. In the laminated paper manufacturing apparatus, the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the row of the heat-bonding portions, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface. and In the laminated paper manufacturing apparatus, the second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller. The peripheral surface is a thermocompression bonding surface facing the thermocompression bonding surface of the first heat seal roller. Furthermore, sealed spaces are formed inside the first heat-seal roller and the second heat-seal roller, respectively, and the internal spaces of the first heat-seal roller and the second heat-seal roller are: The inner spaces of the first heat-sealing roller and the second heat-sealing roller are closed spaces maintained in a vacuum state, and external water supply means are connected to the inner spaces of the first heat-seal roller and the second heat-seal roller, respectively, and the water is supplied from the water supply means to the inner spaces of the second heat-seal roller. Moisture is supplied to the inner spaces of the first heat-sealing roller and the second heat-sealing roller, respectively, and the moisture is heated when the first heat-sealing roller and the second heat-sealing roller are heated. The high-temperature steam is attached to the inner surfaces of the first heat-seal roller and the second heat-seal roller so as to form a thin layer or film, and the layer-like or film-like steam causes the first heat-seal roller and the The entire second heat-seal roller is maintained at a uniform temperature over the entire circumferential direction and the entire length direction of the first heat-seal roller and the second heat-seal roller, and all of the thermocompression bonding protrusions The thermocompression bonding temperature, which is the temperature at the time of thermocompression bonding of the first and second heat seal rollers, is controlled to be maintained uniformly over the entire thermocompression bonding surface. The row of heat-sealed portions of the laminated paper is arranged such that the paired crepe paper and the intermediate layer sheet are bonded together by the heat-sealing projections of the first heat-sealing roller and the heat-sealing projections of the second heat-sealing roller. It is formed by thermocompression bonding between.

According to the laminated paper, laminated paper manufacturing method, and laminated paper manufacturing apparatus of the present invention, it is possible to provide laminated paper having high value-added functions and dramatically improved performance compared to conventional ones. can.

FIG. 1 is a plan view showing a first specific example (laminated paper having a pattern portion) of laminated paper (laminated paper having a printing portion) according to Embodiment 1 of the present invention. FIG. 2 is an enlarged plan view showing the laminated paper according to Embodiment 1 of the present invention taken along line AA in FIG. 1, and (a) shows drying of laminated paper according to Embodiment 1. (b) shows the swollen state of the laminated paper according to Embodiment 1 when it contains water. FIG. 3 is a plan view showing a second specific example of laminated paper (laminated paper having an advertising section) according to Embodiment 1 of the present invention. FIG. 4 is a side view showing laminated paper according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view of the laminated paper according to Embodiment 1 of the present invention cut in the horizontal direction, showing an enlarged portion of the printed layer provided within the circle of the dashed-dotted line. FIG. 6 is a cross-sectional view showing the laminated paper (laminated paper having a printed portion) according to Embodiment 2 of the present invention cut in the horizontal direction, and the circular portion (the portion provided with the printed layer) indicated by the dashed-dotted line Shown enlarged. FIG. 7 is an enlarged cross-sectional view showing the laminated paper (laminated paper having a plurality of intermediate layer sheets) according to Embodiment 3 of the present invention, cut in the horizontal direction. FIG. 8 is an enlarged cross-sectional view showing the laminated paper (laminated paper having a water-impermeable intermediate layer sheet) according to Embodiment 4 of the present invention, cut in the horizontal direction. FIG. 9 is a side view schematically showing a laminated paper manufacturing apparatus (heat seal roller type laminated paper manufacturing apparatus) according to Embodiment 5 of the present invention. FIG. 10 is a side view schematically showing a heat seal roller of a laminated paper manufacturing apparatus according to Embodiment 5 of the present invention. is shown. FIG. 11 is an explanatory diagram for explaining the step of forming the linear heat-sealed portion in the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, and is an explanatory diagram showing the heat seal roller portion as viewed from the side. . FIG. 12 is an explanatory view for explaining the step of forming the linear heat-sealed portion in the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, and the heat seal roller corresponding to FIG. 11 is cut at the end face. FIG. 2 is an explanatory view showing the internal structure of the lever in cross section; 13A and 13B are explanatory diagrams showing the configuration of the linear thermocompression bonding protrusions of the heat seal rollers of the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention. FIG. 2 is a perspective view showing the figure, and the central figure is a circular portion indicated by a dashed line in the upper figure for explaining the state in which the linear thermocompression convex portions of the pair of heat seal rollers are engaged with each other to press the raw material sheets of the laminated paper. is an enlarged cross-sectional view, and the lower figure is a circular portion indicated by a dashed line on the central side of the central figure in order to explain the shape of the linear thermocompression bonding protrusions of the pair of heat seal rollers 1 is an enlarged cross-sectional view of FIG. FIG. 14 shows an example of changing the width between the linear heat-sealed parts according to the crepe ratio in the laminated paper according to Embodiment 1 of the present invention, and (a) corresponds to the first crepe ratio. FIG. 4 is an enlarged plan view of a part of the laminated paper showing the case where the interval (width) between adjacent linear heat-sealed portions is set to a first width, and (b) corresponds to the second crepe rate; FIG. 10 is an enlarged plan view of a part of the laminated paper showing the case where the interval (width) between adjacent linear heat-sealed portions is set to a second width. FIG. 15 is a graph for explaining a preferred specific example of a laminated paper manufacturing method using a laminated paper manufacturing apparatus according to Embodiment 5 of the present invention. Explanatory drawing showing the relationship between the feeding speed of the paper raw material sheet and the thermocompression bonding temperature of the heat seal roller of the laminated paper manufacturing apparatus, (b) Thermocompression bonding temperature of the heat seal roller of the laminated paper manufacturing apparatus and lamination An explanatory diagram showing the relationship between the thickness of the base paper of the raw material sheet of paper (base paper thickness), (c) is the feeding speed of the raw material sheet of laminated paper by the laminated paper manufacturing apparatus and the base paper thickness of the raw material sheet of laminated paper (d) is an explanatory diagram showing the relationship between the thermal compression bonding temperature of the heat seal roller of the laminated paper manufacturing apparatus and the thickness of the nonwoven fabric (nonwoven fabric thickness) of the raw material sheet of laminated paper. is. FIG. 16 is a side view schematically showing a laminated paper manufacturing apparatus (high-frequency sewing machine type laminated paper manufacturing apparatus) according to Embodiment 6 of the present invention.

Hereinafter, a form for carrying out the present invention (hereinafter referred to as an embodiment) will be described. In addition, throughout each embodiment, the same members, elements or portions are denoted by the same reference numerals, and the description thereof is omitted.

Embodiment 1 (Laminated paper in which a printed portion is provided on a nonwoven fabric)
[Overall structure of laminated paper]
The laminated paper of Embodiment 1 is embodied in a laminated paper 10 having a printing portion, as shown in FIGS. 1 to 5. FIG. First, the overall configuration of the laminated paper 10 will be described. As shown in FIG. rectangular shape). On the other hand, in a side view (or a cross-sectional view) of the laminated paper 10, as shown in the side view of FIG. It has a laminated structure composed of a nonwoven fabric 2 as an intermediate layer sheet that constitutes an intermediate layer that is interposed between the two layers. In addition, the laminated paper 10 maintains the laminated structure by heat-sealing one side and the other side of the pair of crepe papers 1 respectively to one side and the other side of the nonwoven fabric 2 at the same location. . That is, the laminated paper 10 includes the first heat-sealed portion 11a and the second heat-sealed portion row 11 (the first heat-sealed portion row 11A and the second heat-sealed portion row 11B), respectively. By heat-sealing the pair of crepe papers 1 to the non-woven fabric 2 at each location of the heat-sealed portion 11b, the pair of crepe papers 1 are heat-sealed to the non-woven fabric 2 at the same locations.

[Heat-sealed part]
The heat-sealed portion 11 will be described in detail. 11 rows of heat-sealed portions 11 are formed so as to extend entirely in the vertical direction). In addition, the laminated paper 10 is arranged so that the multiple rows of heat-sealed portion rows 11 are parallel to each other at regular intervals in the width direction of the laminated paper 10 (the direction perpendicular to the supply direction of the base paper at the time of manufacture, They are continuously arranged side by side over the entirety of the horizontal direction in FIG. As a result, the laminated paper 10 has straight band-shaped non-fused portions 12 between adjacent thermally fused portion rows 11 . That is, in the laminated paper 10, multiple rows of non-fused portions 12 are continuously arranged side by side over the entire width direction so as to be parallel to each other at regular intervals. In the laminated paper 10, the multiple rows of thermally-sealed portions 11 are first rows in which the first thermally-sealed portions 11a are linearly arranged at regular intervals in the longitudinal direction of the laminated paper 10. and a second heat-sealed portion row 11B in which the second heat-sealed portions 11b are arranged linearly at regular intervals in the length direction of the laminated paper 10. consists of That is, a first heat-sealed portion row 11A composed of the first heat-sealed portions 11a and a second heat-sealed portion row 11B composed of the second heat-sealed portions 11b are laminated. They are alternately arranged side by side at regular intervals in the width direction of the paper 10 . Further, as shown in FIG. 2, the first heat-sealed portion 11a constitutes a linear segment-shaped fused portion having a predetermined length and a predetermined width in the laminated paper 10. By linearly arranging the first heat-sealed portions 11a having a constant width in the length direction at regular intervals in the length direction, the first line of the heat-sealed portions 11A in the form of a dashed line is formed. The second heat-sealed portion 11b constitutes a linear segment-shaped fused portion having the same length and the same width as the first heat-sealed portion 11a. By arranging the second heat-sealed portions 11b linearly at regular intervals in the length direction, the heat-sealed second row forms a broken line similar to the heat-sealed portion row 11A of the first row. Section 11B is configured. The first heat-sealed portion 11a of the first heat-sealed portion row 11A and the second heat-sealed portion 11b of the second heat-sealed portion row 11B (that is, adjacent The heat-sealed portion rows 11A and 11B of the second row), the center position of the first heat-sealed portion 11a of the first row of heat-sealed portions 11A is the heat-sealed portion of the second row The positions in the longitudinal direction of the laminated sheets 10 are shifted from each other so as to be positioned in the middle of the gap between the adjacent second heat-sealed portions 11b of the adjoining portion row 11B.

[Unfused part]
As shown in FIG. 4, the laminated paper 10 has a single linear strip-shaped non-fused portion 12 between two adjacent heat-sealed portion rows 11. The non-fused portion 12 , expands after the laminated paper 10 is soaked with water to form an expanded portion. Specifically, as shown in FIGS. 1 and 2, the non-fused portion 12 includes a wide expanded portion 12a (which constitutes a wide expanded portion after the laminated paper 10 is soaked with water), and a and a narrow expanded portion 12b that forms a narrow expanded portion after hydration. More specifically, each of the wide expansion portions 12a is provided in a range (non-overlapping range) where the adjacent first and second heat sealing portion rows 11A and 11B do not overlap each other. It is provided on the laminated paper 10 as a substantially rectangular portion having the length of the non-overlapping range and the width of the non-overlapping range. For example, in FIG. 2, the wide expanded portion 12a includes the first heat-sealed portion 11a of the first heat-sealed portion row 11A on the second row from the left and the second heat-sealed portion row 11A on the third row from the left. The second heat-sealed portion 11b of the heat-sealed portion row 11B is vertically adjacent to the heat-sealed portion row 11A of the first row in the range of the longitudinal intermediate portion that does not overlap with each other In the length range between the ends (between one end and the other end) of the first heat-sealed portion 11a, and from the right edge of the heat-sealed portion row 11A of the first row to the heat of the second row The left edge of another first heat-sealed portion row 11A (in the case of FIG. 2, the fourth heat-sealed portion row 11A from the left) facing each other across the heat-sealed portion row 11B It is provided in a substantially rectangular shape over a width range of up to. On the other hand, each of the narrow expansion portions 12b is provided in the overlapping range (overlapping range) between the adjacent first and second heat sealing portion rows 11A and 11A. is provided on the laminated paper 10 as a small, substantially rectangular portion having a length of and a width of the overlapping range. For example, in FIG. 2, the narrow expanded portion 12b includes the first heat-sealed portion 11a of the first heat-sealed portion row 11A of the second row from the left and the second heat-sealed portion row 11A of the third row from the left. The first heat-sealing portion of the first heat-sealing portion row 11A overlaps with the second heat-sealing portion 11b of the heat-sealing portion row 11B of the first row. Within a length range from one end (for example, upper end) of the portion 11a to the other end (lower end) of the second heat-sealed portion 11b of the heat-sealed portion row 11B of the second row adjacent thereto, and It is provided in a substantially rectangular shape over a width range from the right side edge of the first row of heat-sealed portions 11A to the left side edge of the second row of heat-sealed portion rows 11B.

[Wrinkles in non-fused part (expanded part)]
In the laminated paper 10, the crepe paper 1 of the outer layer and the non-woven fabric 2 of the intermediate layer are not joined at all in the non-fused portion 12, and the non-fused portion 12 of the crepe paper 1 is the heat-fused portion row 11. The portions that are not bound by the heat-sealed portions 11a and 11b (that is, the portions that are not fixed to the nonwoven fabric 2) are movable and deformable with respect to the nonwoven fabric 2 in the thickness direction or the like. In particular, the movable amount of the crepe paper 1 is relatively small in the portion of the non-sealed portion 12 that is close to the heat-sealed portion row 11 (that is, the boundary portion with the heat-sealed portion row 11), In the portion of the non-sealed portion 12 that is separated from the heat-sealed portion row 11 (that is, the central portion between the adjacent heat-sealed portion rows 11), the movable amount of the crepe paper 1 is relatively The amount of movement of the crepe paper 1 is maximized at the central position between the adjacent heat-sealed portion rows 11 . In addition, in the laminated paper 10, in each non-fused portion 12 (that is, each wide expanded portion 12a and each narrow expanded portion 12b) of the crepe paper 1 serving as both outer layers, , a large number of crepe wrinkles, which are the original and inherent wrinkles of the crepe paper 1, appear. The crepe wrinkles are small wrinkles extending in the width direction of the laminated paper 10 (and the width direction of the crepe paper 1), and are formed when the crepe paper 1 is manufactured.

On the other hand, after the first moistening of the laminated paper 10, in each non-fused portion 12 (wide expanded portion 12a and narrow expanded portion 12b) of the crepe paper 1, the crepe paper 1 is pushed through crepe wrinkles. By expanding, that is, crepe wrinkles, which are small wrinkles, expand with moisture, wrinkles different from the original crepe wrinkles of the crepe paper 1 (wrinkles with larger dimensions than crepe wrinkles, as shown in FIG. 2) , hereinafter referred to as “expansion wrinkles”) are formed. In this case, in the crepe paper 1, a plurality of adjacent crepe wrinkles swell with moisture and integrate to form one expanded wrinkle corresponding to the plurality of crepe wrinkles. It can be considered that all or part of the original crepe wrinkles disappear. Further, the expansion wrinkles of the crepe paper 1 become large wrinkles (hereinafter referred to as "great expansion wrinkles") extending substantially in the width direction of the wide expansion portion 12a in the wide expansion portion 12a, and the narrow expansion portion 12a is formed. In 12b, wrinkles of an intermediate size (hereinafter referred to as "inflating wrinkles") extending substantially across the entire width of the narrow inflated portion 12b are formed, and both the large inflated wrinkles and the inflated wrinkles are larger than the crepe wrinkles. becomes large wrinkles. In addition, FIG. 14 shows an example of these expansion large wrinkles 12aw and expansion wrinkles 12bw. Furthermore, in the non-fused portion 12 of the crepe paper 1, not all the crepe wrinkles are transformed into the large wrinkles or wrinkles during expansion. Remains on paper 1. In addition, the present inventor has conceived that in the non-fused portion 12 of the crepe paper 1 in the laminated paper 10, there are two types of large expansion wrinkles in the wide expansion portion 12a. That is, the present inventors consider the expanded large wrinkles to be the first type of expanded large wrinkles (hereinafter " It has been found that there are large and small mixed wrinkles") and the second type of expansion large wrinkles in which the crepe wrinkles have completely disappeared (hereinafter referred to as "complete large wrinkles"). Similarly, the inventor of the present invention conceived that, in the laminated paper 10, in the non-fused portion 12 of the crepe paper 1, there are two types of wrinkles during expansion of the narrow expanded portion 12b. That is, the present inventors have found that the wrinkles during expansion are the first type of wrinkles during expansion in which some of the crepe wrinkles do not disappear and remain (that is, mixed) with wrinkles during expansion (hereinafter " It has been found that there are two kinds of crepe wrinkles: a second type of expanded wrinkles (hereinafter referred to as "complete medium wrinkles") in which crepe wrinkles have completely disappeared. Furthermore, in the laminated paper 10, in the crepe paper 1, these large expansion wrinkles, medium expansion wrinkles, large and small mixed wrinkles, medium and small mixed wrinkles, complete large wrinkles, and complete medium wrinkles are caused by drying the laminated paper 10 after moistening. Afterwards, it basically remains as it is.

As a result, in the laminated paper 10 after containing water, the large expanded wrinkles, medium expanded wrinkles, mixed large and small wrinkles, mixed medium and small wrinkles, complete large wrinkles, and complete medium wrinkles are generated both when moistened and when dried after moistened. In particular, the combination of the expanded large wrinkles, mixed large and small wrinkles, and complete large wrinkles, and the group of medium expanded wrinkles, medium and small mixed wrinkles, and complete medium wrinkles are formed in the wide expanded portion 12a and the narrow expanded portion 12b. They are alternately present, and exhibit a unique effect of increasing the sense of volume in a well-balanced manner over the entirety of both sides of the laminated paper 10. - 特許庁

[Dimensions of heat-sealed parts and spacing between heat-sealed parts]
In the laminated paper 10, each row of the heat-sealed portions 11 is formed by arranging the first heat-sealed portions 11a in the form of straight line segments having a constant length and a constant width in a dashed line at regular intervals in the longitudinal direction. In addition, the second heat-sealed portion 11b, which has a constant length and a constant width and is in the shape of a straight line segment, is displaced from the first heat-sealed portion 11a (that is, each second The second heat-sealed portions 11b are arranged in a dashed line at regular intervals in the length direction so that the middle position of the second heat-sealed portion 11b coincides with the middle position of the interval between the first heat-sealed portions 11a. It is In addition, since the length and width of the first heat-sealed portion 11a and the second heat-sealed portion 11b are set to be the same, the first heat-sealed portion 11a and the second heat-sealed portion 11a The portions 11b have the same configuration except that they are arranged with their positions shifted in the length direction as described above. On the other hand, in the laminated paper 10, the length and width of the first heat-sealed portion 11a and the second heat-sealed portion 11b are set to a predetermined length and a predetermined width. That is, the length and/or width of each first heat-sealed portion 11a and each second heat-sealed portion 11b are appropriately set according to the outer dimensions of one sheet of laminated paper 10 when used. (That is, it is appropriately set according to the vertical dimension, the horizontal dimension, etc., which are determined according to the application of the laminated paper 10).

Specifically, for example, when the laminated paper 10 is used as a wet paper towel, the length of each heat-sealed portion 11a, 11b is set to an arbitrary value within the range of 35 mm to 45 mm. It is set to any value within the range of 38 mm to 42 mm, and more preferably set to a value of about 40 mm. The width of each heat-sealed portion 11a, 11b is set to an arbitrary value within the range of 1.5 mm to 2.5 mm, preferably about 2 mm. The length-to-width ratio (aspect ratio) of each of the heat-sealed portions 11a and 11b is preferably set to an arbitrary ratio within the range of 13:1 to 23:1, and is set to approximately 20:1. is more preferred. That is, it is preferable to set the width of each heat-sealed portion 11a, 11b to about 5% of the length (or set the length to about 20 times the width). Furthermore, in the heat-sealed portions 11 in each row of the laminated paper 10, the distance between the heat-sealed portions 11A and 11b adjacent to each other in the longitudinal direction (hereinafter referred to as "longitudinal heat-sealed portion spacing") is , is set to any value within the range of 18 mm to 22 mm, and is preferably set to a value of about 20 mm. It is preferable to set the ratio of the length of each heat-sealed portion 11a, 11b to the distance between the heat-sealed portions to 2:1. That is, the heat-sealed portions 11 in each row are set such that the distance between the heat-sealed portions in the length direction is set to about 50% of the length of the heat-sealed portions 11a and 11b (or the length of the heat-sealed portions 11a and 11b is It is preferable to set the length to about twice the distance between the heat-sealed portions. In this way, the integral bonding force between the crepe paper 1 and the non-woven fabric 2 is maintained satisfactorily by the heat-sealed portion rows 11, while the expansion rate of the crepe 1 is maximized by the non-sealed portions 12, and the laminated paper 10 is obtained. volume can be maintained in the best condition.

[End shape of heat-sealed part]
Further, each of the heat-sealed portions 11a and 11b has a plane semicircular curved shape at both ends in the longitudinal direction. As a result, compared to the case where the ends of the heat-sealed portions are rectangular (that is, the corners of the ends are right-angled corners), the crepe paper 1 is It is possible to effectively prevent peeling from the nonwoven fabric 2 from the part. As will be described later, in this case, both ends in the longitudinal direction of the thermocompression surface of the thermocompression convex portion of the heat seal roller, which constitutes the means for forming the thermally fused portion in the laminated paper manufacturing apparatus, also correspond to the corresponding plane halves. Because of the circular curved shape, the heat generated by the thermocompression bonding surface of the heat seal roller is greater than when the edges of each thermocompression bonding surface are rectangular (that is, when the corners of the edges are right angles). The raw material sheet of the crepe paper 1, which receives pressure from the thermocompression bonding surface when forming the fused portion, is not damaged due to excessive pressure concentration at the end of the thermocompression bonding surface, thereby improving the production yield. Also, the quality of the laminated paper 10 can be improved. (That is, as will be described later, when the edge of the thermocompression-bonding surface forms a right-angled corner, stress is applied to the raw material sheet of the crepe paper 1 at the corner, compared with the case where the thermocompression-bonding surface has a curved shape. Concentrating on it increases the possibility that the raw material sheet will be damaged at that corner.)

[Crepe rate of crepe paper]
In the laminated paper 10, the crepe ratio of the crepe paper 1 is set to any value within the range of 20% to 40%, preferably to any value within the range of 20% to 30%. and more preferably set to a value of about 30%. That is, if the crepe ratio of the crepe paper 1 is less than 20%, the crepe paper 1 does not expand or swell sufficiently when the laminated paper 10 is formed by laminating and bonding to the nonwoven fabric 2 and then the laminated paper 10 is soaked with water. Very likely. On the other hand, if the crepe rate of the crepe 1 is more than 40%, it becomes difficult to make the raw material sheet with a paper machine during the production of the raw material sheet of the crepe paper 1 (that is, at the time of papermaking).

[Crepe ratio of crepe paper and arrangement interval of heat-sealed parts]
Further, as shown in FIG. 14, in the laminated paper 10, the arrangement intervals LW1 and LW2 of the heat-sealed portion rows 11 (that is, the interval between the width direction center lines of the adjacent heat-sealed portion rows 11, hereinafter referred to as "width ) is set to an arbitrary value within a predetermined range according to the range of the crepe rate of the crepe paper 1 . Specifically, when the crepe ratio of the crepe paper 1 is in the range of 20% to 26%, the widthwise heat-sealed portion interval is the first widthwise (relatively small dimension) The heat-sealed portion interval LW1 is preferably set to an arbitrary value within the range of 10 mm to 15 mm (that is, the lower limit is preferably 10 mm and the upper limit is preferably 15 mm). Within the range of the heat-sealed part spacing, it is preferable to increase the heat-sealed part spacing in the width direction in proportion to the increase in the crepe ratio. Further, when the crepe ratio of the crepe paper 1 is within the range of 26% to 30%, the interval between the heat-sealed portions in the width direction is the second (relatively large) heat-sealed portion in the width direction. It is preferable to set the part interval LW2 to an arbitrary value within the range of 15 to 25 mm (that is, preferably set the lower limit to 15 mm and the upper limit to 25 mm), and heat fusion in the width direction It is preferable to increase the heat-sealed portion spacing in the width direction in proportion to the increase in the crepe rate within the range of the portion spacing. If the gaps LW1 and LW2 between the heat-sealed portions in the width direction of the laminated paper 10 are smaller than the lower limit, there is a high possibility that the crepe paper 1 will not expand or swell sufficiently when the laminated paper 10 is soaked with water. On the other hand, if the gaps LW1 and LW2 between the heat-sealed portions in the width direction of the laminated paper 10 are larger than the upper limit value, when the laminated paper 10 is saturated with water, the large expansion wrinkles and wrinkles during expansion are larger than the desired expansion rate. There is a possibility that the lamination paper 10 may be expanded or stretched excessively, and slackness may be generated in the expansion large wrinkles or wrinkles during expansion, and the quality of the laminated paper 10 may be deteriorated. For example, if the gaps LW1 and LW2 between heat-sealed portions in the width direction of the laminated paper 10 are set to 30 mm or more (that is, a value greatly exceeding 25 mm, specifically a value that is 125% or more of 25 mm), the laminated paper The present inventor has confirmed through experiments that when the material 10 is hydrated, the large wrinkles and wrinkles during expansion expand or expand excessively and become slack. That is, even if the crepe ratio of the crepe paper 1 is 30%, which is the maximum value in the above range, if the widthwise heat-sealed part intervals LW1 and LW2 in the laminated paper 10 are set to a value of 30 mm or more, the laminated paper 10 When the fabric contains water, the large swelling wrinkles, the wrinkles during swelling, and the like swell or expand excessively, resulting in a slack state.

[Pattern part as printing part]
As shown in FIG. 1, the laminated paper 10 can be embodied as a laminated paper 10 having a patterned portion 13 as a first specific example of the printing portion. More specifically, as shown in FIG. 2, the pattern portion 13 can have a structure in which unit patterns 13a and 13b having the same motif are arranged over the entire surface of the laminated paper 10 or over a certain range. In FIG. 2, for example, the unit pattern 13a constitutes a pattern of a predetermined size with a motif of a corolla (aggregation of petals) of a predetermined kind of flower, while the unit pattern 13b has the same corolla as the unit pattern 13a. The motif constitutes a pattern having a dimension larger than that of the unit pattern 13a. The configuration of the pattern portion 13 is not limited to that shown in FIG. 2, and may be configured using any pattern. That is, the pattern portion 13 can use a unit pattern with a motif different from the unit patterns 13a and 13b shown in FIG. Any combination of patterns can also be used. Alternatively, the pattern portion 13 may have a structure using a repeated pattern such as a lattice pattern or a checkerboard pattern other than the structure using individual unit patterns as shown in FIG. Alternatively, the pattern portion 13 may be a monochromatic pattern (whole monochromatic pattern) printed on the entire surface of the laminated paper 10 in an arbitrary single color different from the original base color of the laminated paper 10 (especially the base color of the crepe paper 1). Alternatively, a monochromatic pattern (partially monochromatic pattern) may be formed by printing an arbitrary single color different from the original base color of the laminated paper 10 on a partial range of the laminated paper 10 . Alternatively, the pattern portion 13 may be a pattern (hereinafter referred to as "multi-color pattern") in which two or more different colors are randomly printed on the entire surface or a part of the laminated paper 10. . In short, the pattern portion 13 may have any configuration as long as it can impart a separate visual effect to the laminated paper 10 by printing an arbitrary color on the laminated paper 10 that is different from the base color of the normal laminated paper 10. can be

[Advertising Department as Printing Department]
Further, as shown in FIG. 3, the laminated paper 10 can be embodied as a laminated paper 10 having an advertising portion 14 as a second specific example of the printing portion. Specifically, the advertising section 14 can have, for example, an advertising space 14b and an advertising space 14c inside the outer frame 14a. In this case, the advertising unit 14 prints, for example, the title, copy, etc. of specific advertising content in the advertising space 14b, and prints the details of the advertising content (product description, picture corresponding to the product, etc.) in the advertising space 14c. It can be configured as In FIG. 3, the outlines of the outer frame 14a, the advertisement frame 14b, and the advertisement frame 14c of the advertisement section 14 are drawn with dashed lines, but this is only the outline of the outer frame 14a, the advertisement frame 14b, and the advertisement frame 14c. And, it is a expedient for explaining the range of the advertising frame 14c, and (although it is of course possible to draw them), the outer frame 14a, the advertising frame 14b, and the advertising frame are usually formed on the laminated paper 10. The outline of 14c is never drawn. Further, the outer frame 14a of the advertisement section 14 is also provided for convenience to show an example of the advertisement content, and the entirety can be embodied as the advertisement frames 14a and 14b without providing the outer frame 14a. Moreover, the number of the advertisement frames 14a and 14b can also be one frame, or any number of frames of two or more frames. Furthermore, the configuration of the advertisement section 14 is not limited to that shown in FIG. 2, and can be arbitrarily configured. In other words, the advertising unit 14 is configured to print any advertising content or content in any expression mode or format, as long as the content is printed on an advertising print medium such as a regular leaflet or sales promotion item. be able to. Moreover, as the content to be printed on the advertisement section 14, any desired items such as a company name, a logo mark, and a brand can be printed. Further, the laminated paper 10 having a printing unit is used for novelty goods such as wet paper towels that are distributed in large quantities for the purpose of announcing or advertising various information such as sale information of retail stores and company campaign information. It can also be applied to novelty goods such as paper towels that are distributed in large quantities for the purpose of announcing and making known various events such as the Olympics and expositions.

[Print section structure]
Next, the structure of the printing portion of the laminated paper 10 will be described. As shown in the specific examples of FIGS. 5, 6, 7, and 8, the laminated paper 10 is a surface other than the outer surface of the crepe paper 1 as the outer layer sheet and is arranged inside the laminated paper 10. One of the main features is that the printed portion is printed on the surface using a predetermined printing ink. In addition to this, in the laminated paper 10, even when the laminated paper 10 is dried, the printed portion is visible from the outside through the crepe paper 1 of the outer layer sheet of the laminated paper 10, and when the laminated paper 10 contains water Out of the crepe paper 1 as the outer layer sheet, at least the outer layer on the side where the printed part is provided so that the permeability from the crepe 1 as the outer layer sheet of the printed part increases and the visibility from the outside increases. Another major feature is that the thickness (basis weight) of the crepe paper 1 as a sheet is set, and the material (paper quality) is also set along with the thickness, if necessary. Specifically, in Embodiment 1, the laminated paper 10 is composed of a pair of crepe papers 1 as outer layers and one or more nonwoven fabrics 2 arranged in a laminated state between the pair of crepe papers 1. It has a laminated structure of a multi-layer structure (a multi-layer structure of three or more layers), and faces one crepe paper 1 as an outer layer sheet as its inner surface (that is, as an inner surface of the laminated paper 10) The printed portion is provided on the surface of the nonwoven fabric 2, and the crepe paper 1 is bonded to the nonwoven fabric 2 by thermal fusion and pressure bonding with the thermal fusion bonding portion 1.

[Printing section provided on nonwoven fabric]
For example, as shown in FIG. 5, the printed portion consists of a printed layer 2a provided on one side (one side in the thickness direction) of a nonwoven fabric 2 as an intermediate layer sheet. That is, the nonwoven fabric 2 of the laminated paper 10 is configured as an intermediate layer sheet made of a material that can be printed with a printed portion, and a desired pattern portion 13 or advertisement portion is formed on one side of the nonwoven fabric 2 using a predetermined printing ink. A printing unit is configured by providing 14 by printing. In FIG. 5, the printed layer 2a is drawn as a thin layer on one side of the nonwoven fabric 2 for convenience of explanation. Since the printing ink permeates into the interior of the nonwoven fabric 2 from one side of the nonwoven fabric 2 to form a predetermined pattern of the printed portion, etc., the printing ink completely penetrates into the interior of the nonwoven fabric 2, and the ink for printing is applied to one side of the nonwoven fabric 2. In some cases, no layer of ink is formed, or in other cases, a portion of the printing ink penetrates inside the nonwoven fabric 2 while a remaining layer of printing ink is formed on one side of the nonwoven fabric 2 . In some cases, the other side of the nonwoven fabric 2 is exposed after the printing ink has completely penetrated into the nonwoven fabric 2 , and a layer of the printing ink is formed on the other side of the nonwoven fabric 2 . In any case, the printed portion of the laminated paper 10 is drawn with the highest density on one side of the nonwoven fabric 2 serving as the printed surface, and is visually recognized as the printed layer 2a. That is, the pattern portion 13 and the advertisement portion 14 of the various types of laminated paper 10 described above are printed on one side of the nonwoven fabric 2 using an arbitrary printing ink and an arbitrary printing method according to the configuration of the pattern and the content of the advertisement. is provided by printing on the surface of

[Configuration of printing layer (printing ink and printing method)]
Here, the printed layer 2a of the printed portion of the laminated paper 10 is formed on one surface of the nonwoven fabric 2 by any printing method using any printing ink. As a method, the printed part is formed using flexographic printing technology, and the printed part is formed using water-based ink or UV (ultraviolet curable) ink as printing ink. More specifically, flexographic printing is a type of letterpress printing that employs the direct transfer method. Rubber or synthetic resin is used as the plate material, and liquid ink consisting of water-based ink and UV ink is used as the printing ink. However, the printed layer 2a of the printed portion of the laminated paper 10 is printed by adjusting the concentration of water-based ink or UV ink and then printing a predetermined pattern portion 13 or advertising portion 14 on one side of the nonwoven fabric 2. make up the department. The laminated paper 10 is formed by inserting the nonwoven fabric 2 having the printed portion between a pair of crepe papers 1 and heat-sealing them to each other by means of the heat-sealing portion row 11 to integrate them. there is Even when the printing target of the printing part is the nonwoven fabric 2 having a fine uneven surface, the laminated paper 10 can be used as the printing part by a plate having the elasticity and shape followability of flexographic printing. The pattern portion 13 and the advertisement portion 14 can be clearly printed. As a result, in the laminated paper 10 produced using the nonwoven fabric 2 with prints, especially in its wet state, the prints are visible from the outside through the crepe paper 1 with good print quality. Moreover, in the laminated paper 10, the printing ink in the printed portion of the nonwoven fabric 2 is water-based ink or UV ink, so the printing ink does not contain an organic solvent. As a result, the laminated paper 10 manufactured using the nonwoven fabric 2 having a printed portion is not affected by volatilization of the organic solvent unlike printing ink using an organic solvent. When applied to supplies, it becomes a user- and environment-friendly product. In printing on the nonwoven fabric 2 of the laminated paper 10, for example, a flexographic printing machine capable of printing up to seven colors is used, and the density of the printing ink for each color is adjusted.

[Nonwoven fabric material]
On the other hand, the laminated paper 10 according to Embodiment 1 shown in FIG. The nonwoven fabric is made of a material that can be reliably heat-sealed and bonded at the fusion-bonded portion. As a result, one surface side of the laminated paper 10 (typically, when the laminated paper 10 is applied to a wet paper towel, one surface side of the laminated paper exposed on the outer surface side of the wet paper towel, that is, the side of the wet paper towel) The pattern portion 13 and the advertising portion 14 can be provided by printing on one surface of the nonwoven fabric 2 to be arranged on the surface side), and the crepe paper 1 serving as a pair of outer layers is preferably formed on both surfaces of the nonwoven fabric 2. to form a laminated paper 10 having a multi-layer structure (three-layer structure in the case of FIG. 5).

[Thickness of nonwoven fabric]
In addition, in the laminated paper 10, as described above, the nonwoven fabric 2 as the intermediate layer sheet has both printability that enables printing on the printed portion and heat-sealability that enables heat-sealing of the crepe paper. However, it is preferable to use a nonwoven fabric having a thickness within a predetermined range in order to have both printability and heat-sealability. Specifically, for example, conventional non-woven paper towels use a non-woven fabric formed into a sheet with a basis weight of 45 to 70 g/cm 2 as a raw material sheet. On the other hand, in the laminated paper 10 of the present embodiment, in addition to using a pair of crepe paper 1 and nonwoven fabric 2 as raw material sheets, the nonwoven fabric 2 has a basis weight of any value within the range of 15 to 25 g / m ² It is preferable to use a nonwoven fabric having a thickness, more preferably a thickness of any value within the range of basis weight 18-22 g/m ² , and any value within the range of basis weight 18-20 g/m ² and most preferably a thickness of 20 g/m ² in terms of basis weight. That is, if the thickness of the nonwoven fabric 2 in the laminated paper 10 is greater than 25 g/m ² in terms of basis weight, the laminated paper 10 may lack flexibility. , may give the user of the laminated paper 10 a hard feel. Further, if the thickness of the nonwoven fabric 2 exceeds 25 g/m ² in terms of basis weight, the strength becomes higher than necessary, which causes an unnecessary increase in cost. Furthermore, during the manufacturing process of the laminated paper 10, for example, in the step of heat-sealing the crepe paper 1 to the nonwoven fabric 2 by a pair of heat-sealing rollers, the nonwoven fabric 2 is heated from the heat-sealing roller having a heat source through one of the crepe papers 1. When heat is transferred to the nonwoven fabric 2, the heat transfer efficiency decreases as the thickness of the nonwoven fabric 2 increases. However, the heat fusion between the other crepe paper 1 and the other surface of the nonwoven fabric may not be sufficiently performed, and the adhesive strength of the nonwoven fabric 2 to the other crepe paper 1 may be insufficient. On the other hand, if the thickness of the nonwoven fabric 2 is less than 15 g/m ² in terms of basis weight, the amount of the thermoplastic resin contained in the nonwoven fabric 2, which is a material for exhibiting the heat-sealing strength, is relatively reduced, and both sides of the nonwoven fabric 2 are There is a possibility that sufficient heat-sealing strength cannot be obtained when the crepe paper 1 is heat-sealed to the surface, and the overall stiffness of the laminated paper 10 is weakened. When this happens, the feeling of use of the laminated paper 10 may be adversely affected.

[Raw material fiber for nonwoven fabric]
Furthermore, as the nonwoven fabric 2, when the thickness is set to a value within the above predetermined range in order to combine the above printability and heat fusion, the thickness is particularly a value on the lower limit side within the above predetermined range. (for example, when the thickness has a basis weight of 15 g/m ² , a basis weight of 18 g/m ² , etc.), it is preferable to use a nonwoven fabric made of core-sheath structure composite fibers. That is, when the thickness of the nonwoven fabric 2 is relatively small (that is, when the value is on the lower limit side within the above predetermined range), with such a relatively thin nonwoven fabric, the laminated paper 10 as a whole However, by using a nonwoven fabric made of the core-sheath structure composite fiber, when the crepe paper 1 is heat-sealed to the nonwoven fabric 2, the sheath portion of the core-sheath structure composite fiber is held in place. The nonwoven fabric 2 softens or melts at the heating temperature of , and exhibits adhesive strength due to heat fusion to the crepe paper 1, while the core portion of the core-sheath structure composite fiber remains as it is without softening or melting. In order to maintain the strength and stiffness of itself, the strength and stiffness of the entire laminated paper 10 can be finally maintained, and the thin nonwoven fabric 2 can also maintain the voluminous feel of the laminated paper 10 .

[Thickness of crepe paper]
In the laminated paper 10, the crepe paper 1 has a thickness of any value within a given range to achieve a given transmittance (permeability). Specifically, one crepe paper 1 that is overlaid and joined to one surface of the nonwoven fabric 2 (that is, the surface on which the printed portion is provided) is a nonwoven fabric through the crepe paper 1 in the dry state of the laminated paper 10. A transmittance that makes at least part of the printed part of the nonwoven fabric 2 visible (or a transmittance that makes at least a part of the printed part of the nonwoven fabric 2 visible in a translucent state), and In a wet state due to water content of the laminated paper 10, the transmittance at which the entire printed portion of the nonwoven fabric 2 is clearly visible through the crepe paper 1 (or the entire printed portion of the nonwoven fabric 2 is visible in a substantially transparent state. The thickness is set so that the transmittance is such that On the other hand, the other crepe paper 1 that is overlaid and joined to the other surface of the nonwoven fabric 2 is usually set to have the same thickness as the one crepe paper 1, but can also be set to have a different thickness. Even if the thickness of the other crepe paper 1 is the same as that of the other crepe paper 1, if the thickness of the nonwoven fabric 2 is within the above-described predetermined range, the nonwoven fabric is formed through the other crepe paper 1 in the dry state of the laminated paper 10. At least part of the printed portion of 2 is still visible (although the clarity is lower than that of one crepe paper 1 side), and in the wet state due to the water content of the laminated paper 10, through the other crepe paper 1 The entire printed portion of the nonwoven fabric 2 can be visually recognized in a somewhat clear state (although the clearness is lower than that of the crepe paper 1 on one side). In any case, in the laminated paper 10, the crepe paper 1 has an arbitrary value within a predetermined range for achieving a predetermined light transmittance (synonymous with light transmittance, hereinafter simply referred to as "transmittance"). The thickness of the non-woven fabric is set to the thickness of the crepe paper 1 in the dry state of the laminated paper 10, whether viewed from the side of one crepe paper 1 or from the side of the other crepe paper. At least a part of the printed portion of the nonwoven fabric 2 becomes visible, and when the laminated paper 10 is in a wet state due to water content, the entire printed portion of the nonwoven fabric 2 can be visually recognized in a more or less clear state through the crepe paper 1. The unique effect of

Specifically, in the laminated paper 10, the crepe paper 1 has a basis weight of any value within the range of 20 to 50 g/m ² , more preferably 20 to 40 g/m ² . set to any value, more preferably set to any value within the range of 30 to 40 g/m ² , still more preferably set to any value within the range of 30 to 35 g/m ² , even more preferably set to any value within the range of 30-33 g/m ² or any value within the range of 33-35 g/m ² , most preferably set to a value of about 33 g/m ² or about A value of 35 g/m ² is set. For example, the thickness of the crepe paper 1 can be set at a basis weight of 35 g/m ² , 27 g/m ² or 23 g/m ² . As a result of extensive research on the relationship between the crepe wrinkles of the crepe paper 1 and the thickness of the crepe paper 1, the inventor of the present invention found that when the thickness of the crepe paper 1 is outside the above range, the crepe paper 1 of the laminated paper 10 requires It was found that the desired physical properties could not be ensured. That is, when the thickness of the crepe paper 1 is 20 g/m ² or less in basis weight, when the crepe paper 1 is manufactured using the crepe paper manufacturing apparatus, the raw material sheet of the crepe paper 1 (not forming a crepe) It has been found that when the feeding speed of the paper sheet is increased, it is not possible to crepe the stock sheet. On the other hand, when the thickness of the crepe paper 1 exceeds 50 g/m ² in basis weight, the crepe paper 1 is laminated on the nonwoven fabric 2 to form the laminated paper 10 , and the nonwoven fabric 2 is heated at the heat-sealing section 11 . When trying to fuse, the heat from the pressure bonding surface of the heat seal roller is blocked by the thick crepe paper 1 and does not reach the nonwoven fabric 2 sufficiently, and the thermoplastic resin as an adhesive for the nonwoven fabric 2 is used. There is a possibility that the crepe paper 1 cannot be adhered to the nonwoven fabric 2 because the crepe paper 1 cannot be sufficiently melted and the expected adhesive strength to the crepe paper 1 cannot be exhibited.

Further, when the thickness of the crepe paper 1 exceeds 40 g/m ² in terms of basis weight, it becomes necessary to extremely reduce the feeding speed of the raw material sheet in order to manufacture the crepe paper during manufacture by the crepe paper manufacturing apparatus. From this point of view, it is preferable to set the upper limit of the thickness of the crepe paper 1 to 40 g/m ² . Further, when the thickness of the crepe paper 1 exceeds 35 g/m ² in terms of basis weight, even if the feed speed of the raw material sheet is reduced during production by the crepe paper production apparatus, the crepe paper may not be crepe depending on the performance of the crepe paper production apparatus. From this point of view, it is preferable to set the upper limit of the thickness of the crepe paper 1 to 35 g/m ² .

[Overall thickness of laminated paper (total thickness of crepe paper and nonwoven fabric)]
As described above, the crepe paper 1 and the nonwoven fabric 2, which are the components of the laminated paper 10, are each configured to have a thickness of an arbitrary value within a predetermined range, and the thickness of the entire laminated paper 10 is the crepe paper 1 and the thickness of the nonwoven fabric 2. Preferably, the total thickness of the laminated paper 10 is such that the thickness of each crepe paper 1 is 35 g/ ^m2 in terms of basis weight, and the thickness of the nonwoven fabric 2 is determined by basis weight. 20 g/m ² makes the overall thickness (35+20+35=) 90 g/m ² most preferred. The thickness of the crepe paper 1 is set to this value (35 g/m ² ), the thickness of the nonwoven fabric 2 is set to this value (20 g/m ² ), and the total thickness of the laminated paper 10 is set to this value (90 g/m ² ). Then, when manufacturing the laminated paper 10, the raw material sheet of the laminated paper 10 (that is, the raw material sheet formed by inserting one nonwoven fabric raw material sheet between a pair of crepe paper raw material sheets) is cut at a predetermined feeding position. (i.e., cutting the raw material sheet of the laminated paper 10 into a predetermined length according to the purpose of use), the cutting can be performed best, and the production efficiency can be improved, and the yield can be improved. .

[Effects of Laminated Paper Having a Printing Part]
In this way, the laminated paper 10 provided with the printed part has an appearance and appearance as if the printed parts such as the pattern part 13 and the advertising part 14 are half embossed through the crepe paper 1, so it exhibits a unique design effect. can do. Specifically, when the laminated paper 10 is dry, the transmittance (transmittance) of the dry crepe paper 1 is relatively low, so the patterns and advertisements on the printed portion are unclear through the crepe paper 1. However, although it is visible to some extent, in the wet state due to the water content of the laminated paper 10, the wet crepe paper 1 has a relatively high transmittance (transmittance), so the pattern of the printed part The advertisement is clearly visible through the crepe paper 1, and the existence of the crepe paper 1 produces a unique effect of being visually recognized as if it stands out from the laminated paper 10.例文帳に追加

[Effect of printed part when provided on nonwoven fabric]
Moreover, as described above, since the laminated paper 10 is configured as described above, it can be provided with a printed portion printed with the pattern portion 13 and the advertising portion 14 which are not conventional. Therefore, for example, when compared to a wet towel made by simply coloring the raw material fibers (pulp, etc.) of the raw material sheet of the wet towel, such as a conventional colored paper towel (a paper towel whose entire surface is colored in a single color), the laminated paper 10 has a higher print quality. The design portion 13 and the advertisement portion 14 as the portions make the product extremely rich in design. In addition, since the laminated paper 10 is formed by sandwiching the nonwoven fabric 2 provided with the printed part between the pair of crepe papers 1, the pattern and advertisement of the printed part give a soft impression to the observer when viewed from the outside. to give a unique visual effect. In particular, when the laminated paper 10 is applied to sanitary paper products such as wet towels, which are the main uses, the laminated paper 10 as a sanitary paper product is usually provided to the user after being moistened with water. The laminated paper 10 in this state is used by the user to wipe off dirt from his or her hands or a part of the body. In this case, it is necessary to prevent the printing ink on the printed portion of the laminated paper 10 from dissolving with water, eluting from the crepe paper 1 to the outside, and adhering to the hands and body of the user. However, conventional colored wet towels are entirely colored with a predetermined monochromatic printing ink, so that the printed ink is exposed on the surface of the colored wet towel. Therefore, conventional color wet towels need to be printed with organic solvent type printing ink so that the printing ink exposed on the surface does not dissolve and touch the user's hands or skin when wet due to water content. However, as described above, the influence of the volatile components of the organic solvent cannot be denied.

On the other hand, in the laminated paper 10 of the present embodiment, as described above, flexographic printing is used to form a printed portion on the nonwoven fabric 2 with water-based ink or UV ink, and both sides of the nonwoven fabric 2 are coated with crepe paper 1. Since the printing ink is completely covered, the printing ink of the printing part is not directly exposed on the surface of the laminated paper 10, and always remains shielded by the crepe paper 1. - 特許庁Therefore, although the laminated paper 10 is provided with a printing part, it is configured so that the printing ink does not come into direct contact with the user's hand or skin even when used in a wet state when it contains water. It can be provided as a laminated paper 10 that is safe and harmless against the environment, and can be provided as an environmentally friendly laminated paper. has the advantage of no The water-based ink used as the printing ink for the printed portion of the laminated paper 10 is preferably a pigment-type water-based ink. It is possible to effectively prevent the ink from easily dissolving and eluting to the outside.

[Method for manufacturing laminated paper having printed portion (width dimension of nonwoven fabric raw material sheet)]
Next, a method for manufacturing the laminated paper 10 having a printing portion will be described. In general, non-woven fabrics are manufactured by a predetermined web forming method such as a dry method, a wet method, or a spunbond method from predetermined raw material fibers made of natural fibers (pulp) and synthetic fibers (also called fleece). The fibers of the web are bonded by a predetermined bonding method such as a chemical bonding method, a thermal bonding method, a needle punching method, or a water entanglement method. On the other hand, in the laminated paper 10 of the present embodiment, it is preferable to use a nonwoven fabric made of the core-sheath structure conjugate fiber as the nonwoven fabric 2. Furthermore, as the nonwoven fabric 2, an air-through method, which is a kind of thermal bonding method, is used. It is more preferable to use a non-woven fabric manufactured by bonding fibers together (hereinafter referred to as "air-through non-woven fabric" for convenience of explanation). This air-through nonwoven fabric is rich in stretchability and flexibility, and has advantages such as giving a soft touch to the user and having a good touch feeling. also enables the expression of good adhesive strength when the above. Further, the details will be described later in the section of the laminated paper manufacturing apparatus and the laminated paper manufacturing method, but in the manufacturing of the laminated paper 10, a pair of raw material sheets of the crepe paper 1 (hereinafter referred to as "crepe paper raw material sheet") ), a raw material sheet for the nonwoven fabric 2 (hereinafter referred to as "nonwoven fabric raw material sheet") is sandwiched between the raw material sheets (hereinafter referred to as "laminated raw material sheet") having a three-layer structure (three-ply). Then, the laminated raw material sheet is fed, for example, between a pair of heat-sealing rollers, and the pair of crepe paper raw material sheets are heat-sealed to the non-woven fabric raw material sheet by the pair of heat-sealing rollers to form a final product. to produce a typical laminated paper. At this time, the crepe paper raw material sheet and the nonwoven fabric raw material sheet usually have the same width dimension of a predetermined width (for example, the width dimension of 1200 mm). In particular, if the widthwise dimension of the nonwoven fabric sheet is smaller than the widthwise dimension of the crepe paper raw material sheet, the crepe paper raw material sheet cannot be heat-sealed to the nonwoven fabric sheet at the widthwise end of the laminated raw material sheet. Therefore, it is not preferable that the widthwise dimension of the nonwoven fabric raw material sheet is smaller than the widthwise dimension of the crepe paper raw material sheet.

[Setting the width dimension of the raw nonwoven fabric sheet according to the material of the nonwoven fabric]
On the other hand, as described above, when the nonwoven fabric 2 is provided with the printed portion, the raw material sheet of the nonwoven fabric is fed to a predetermined printing device in advance, and the predetermined printed portion is printed on the raw material sheet. At this time, when the air-through nonwoven fabric is used as the nonwoven fabric, it is thought that it is due to the large elasticity of the nonwoven fabric. As a result of continuing intensive research on the invention of the laminated paper, the inventors came up with the following configuration. That is, when forming the printed portion on the laminated paper 10, for example, when forming the printed portion using flexographic printing, if the printed portion is printed on the nonwoven raw material sheet 2 having a width of 1200 mm, after printing, the nonwoven raw material sheet will be The width shrinks from 1200 mm to 1150 mm (i.e., the width shrinks to about 96% of the original width), or under other conditions the width of the nonwoven raw material sheet shrinks from 1300 mm to 1200 mm (i.e., the original width shrinks to 1200 mm). The present inventors have found that the width shrinks to about 92% of the width). Considering the shrinkage of the raw nonwoven fabric sheet at the time of printing, the inventor also tried printing in a state in which the raw nonwoven fabric sheet was stretched in the width direction (by the amount of shrinkage), but in this case, the raw nonwoven fabric sheet We have found that it is difficult to perform the desired printing. Therefore, in the method of manufacturing the laminated paper 10 having a printing part, the width of the laminated paper 10 to be actually obtained is adjusted according to the shrinkage rate in order to compensate for the shrinkage during printing on the nonwoven raw material sheet as the nonwoven raw material sheet. (ie, the width of the nonwoven fabric sheet is set so as to compensate for the shrinkage dimension according to the shrinkage rate).

Through experiments, the inventors have found that, for example, when a nonwoven fabric raw material sheet having a width of 1200 mm is used and the printed portion is printed on this nonwoven raw material sheet, the nonwoven raw material sheet shrinks after printing, and the width becomes 1150 mm. (that is, a width that is 50 mm smaller than the width before printing, or a width that is approximately 4% smaller than the width before printing). Therefore, in manufacturing the laminated paper of the present embodiment, a nonwoven fabric is used as the base paper having a size about 4% (about 4.12%) larger than the required size after shrinkage. For example, when the width of the laminated paper raw material sheet is 1200 mm, the width of the crepe paper raw material sheet is the same 1200 mm, but the width of the nonwoven raw material sheet is about 4% larger than 1200 mm (for example, 1250 mm). width).

[Unique effect by setting the width dimension of the nonwoven fabric raw material sheet]
According to the method for producing laminated paper using the raw nonwoven fabric sheet whose width direction dimension is set as described above (that is, the width direction dimension is set so as to compensate for the shrinkage rate of the raw nonwoven fabric sheet during printing), the nonwoven fabric The width of the raw material sheet becomes the same width as the predetermined width of the laminated paper raw material sheet (that is, the predetermined width of the crepe paper raw material sheet) after the printing process of the printing unit. For example, when the predetermined width of the laminated paper raw material sheet (that is, the predetermined width of the crepe paper raw material sheet) is 1200 mm, the width of the nonwoven raw material sheet is also the same width of about 1200 mm (that is, 50 mm smaller than the width before printing). width (or about 4% less than the width before printing). Therefore, a laminated paper material sheet having a three-layer structure in which the printed nonwoven fabric sheet (width of about 1200 mm) is laminated between a pair of crepe paper material sheets (width of 1200 mm) has a crepe sheet as a pair of outer layers. The paper raw material sheet and the non-woven fabric raw material sheet as the intermediate layer all have the same width, and can be smoothly provided to the laminated paper manufacturing process as a laminated paper raw material sheet with a width of 1200 mm, and the laminated paper 10 after manufacturing is also possible. , will have a width of 1200 mm, which is the desired width.

Embodiment 2 (Laminated paper in which the printing part is provided on crepe paper)
[Overall structure of laminated paper and structure of crepe paper]
As shown in FIG. 5, in the example of Embodiment 1, the laminated paper 10 has a three-layer structure (three-sheet superimposed structure) consisting of a pair of crepe papers 1 and a sheet of nonwoven fabric 2. In addition, although the printed layer 2a of the printed portion is provided on the surface of the nonwoven fabric 2 as the intermediate layer sheet, as shown in FIG. A print layer 1a of a print portion is provided on the inner surface of crepe paper 1 as a sheet. That is, in Embodiment 2, the laminated paper 10 includes a pair of crepe papers 1 as outer layer sheets and nonwoven fabric as one or more intermediate layer sheets disposed between the pair of crepe papers 1 in a laminated state. 2 (multilayer structure of three or more layers), and as the inner surface (that is, as the inner surface of the laminated paper 10), one crepe paper 1 as the outer layer sheet. The printing portion is provided, and the crepe paper 1 is bonded to the nonwoven fabric 2 by heat sealing and pressure bonding by the heat sealing portion 1 . In addition, the inner surface of the crepe paper 1 is a laminated paper 10 having a laminated structure in which one (or two or more) nonwoven fabric 2 as an intermediate layer sheet is sandwiched between a pair of crepe papers 1 as outer layer sheets. The surface that comes to the inner side of the laminated structure of the laminated paper 10 (that is, the side that faces the nonwoven fabric 2) when the . Here, on both sides of the crepe paper 1, one surface is a surface with high smoothness (that is, a relatively smooth surface with a good touch feeling), and the other surface is a surface with low smoothness (that is, In the laminated paper 10 of Embodiment 2, the above-mentioned laminated structure is formed with the front surface side of the crepe paper 1 as the inner surface side. is preferred.

[Unique effect of printing on the inner surface (surface) of crepe paper]
According to the laminated paper 10 of Embodiment 2, the nonwoven fabric 2 is interposed between the pair of crepe papers 1, and the crepe paper 1 is heat-sealed to the nonwoven fabric 2 by the heat-sealing part 1. The present inventor has confirmed through experiments that the crepe paper 1 is more reliably and firmly adhered to the nonwoven fabric 2 when the crepe paper 1 is fixed by pressing. In addition to this, when the printing layer 1a of the printing portion is provided on the inner surface of the crepe paper 1 as in Embodiment 2, the inner surface of the crepe paper 1 on which the printing layer 1a is provided (that is, printed with printing ink) is Since the surface has a high degree of smoothness, the desired pattern portion 13 and the advertisement portion 14 can be printed in a better state, and the printing quality can be further improved. In addition, in the second embodiment, since the printed portion is provided on the inner surface of the crepe paper 1, the printed portion does not come into contact with the user's fingers or skin (skin). The anxiety of the user can be eliminated, and health problems caused by printing ink can be reliably prevented. In addition, when providing the printing unit in the laminated paper 10, as in the second embodiment, rather than providing the printing unit in the crepe paper 1 that is the outer layer of the laminated paper 10, as in the first embodiment, the middle of the laminated paper 10 It is preferable from the viewpoint of printing quality to provide the printed portion on the nonwoven fabric 2 that serves as the layer (that is, the inner layer).

[Each thickness of crepe paper, nonwoven fabric, and laminated paper]
In the case of the laminated paper 10 of the second embodiment, the thickness of the crepe paper 1, the thickness of the nonwoven fabric 2, and the thickness of the entire laminated paper 10 can be set in the same manner as in the case of the first embodiment.

Embodiment 3 (Laminated paper in which a colored portion is provided on an intermediate layer sheet)
[Overall structure of laminated paper and structure of non-permeable sheet as intermediate layer sheet]
As shown in FIG. 5, in the example of Embodiment 1, the laminated paper 10 has a three-layer structure, and has a configuration in which a printed portion is provided on the surface of a nonwoven fabric 2 as an intermediate layer sheet. As shown in , in Embodiment 2, the laminated paper 10 has a three-layer structure, and has a configuration in which a printed portion is provided on the inner surface of the crepe paper 1 as an outer layer sheet. As shown in FIG. 7, in the laminated paper 10 having a three-layer structure according to Embodiment 3, the intermediate layer sheet is composed of a non-permeable sheet 5 (for example, a non-permeable sheet or a waterproof sheet) made of a synthetic resin film. , a printed layer 5a of a printed portion is provided on the surface of the impermeable sheet 5. As shown in FIG. That is, in Embodiment 3, the laminated paper 10 includes a pair of crepe papers 1 as outer layer sheets and a non-transmissive intermediate layer sheet as a single intermediate layer sheet disposed between the pair of crepe papers 1 in a laminated state. It has a multilayer structure (three-layer structure) consisting of a transparent sheet 5, and the printed portion is provided on the surface of the non-permeable sheet 5 as an inner surface (that is, as an inner surface of the laminated paper 10). 2. The crepe paper 1 is heat-sealed and pressure-bonded to the impermeable sheet 5 by the heat-sealing portion 1 . As the non-permeable sheet 5, for example, in addition to what is generally called a vinyl sheet or vinyl film, a resin film or resin sheet made of polyvinyl chloride resin, a resin sheet made of polyolefin resin (made of polyethylene resin, polypropylene resin, etc.) can be used. A resin film, a resin sheet, or the like can be suitably used. Moreover, the thickness of the non-permeable sheet 5 is preferably set to a predetermined thickness within a range of, for example, 0.1 mm to 0.2 mm. The non-permeable sheet as the non-permeable sheet 5 has a main function of blocking the permeation of moisture, but the non-permeable sheet is a non-permeable sheet that blocks the permeation of oil (hereinafter referred to as " (referred to as "oil-impermeable sheet"). In addition, in the present document, the term "non-permeable sheet" simply includes the oil-impermeable sheet in addition to the water-impermeable sheet, and also blocks the permeation of other liquids and some gases. Including things. That is, in the present invention, the non-permeable sheet may be a sheet-like or film-like intermediate layer sheet made of a synthetic resin that blocks permeation of moisture and/or oil.

[Unique effect of non-permeable sheet]
According to the laminated paper 10 of Embodiment 3, since the non-permeable sheet 5 including the water-impermeable sheet and the oil-impermeable sheet as the intermediate layer sheet blocks the permeation of water and oil, the laminated paper 10 is In addition to representative products such as wet paper towels, it can be applied to wrapping paper for temporarily or long-term wrapping of objects and articles to which moisture and oil are attached, and the use of the laminated paper 10 is greatly expanded. can be expanded.

[Scope of Invention of Laminated Paper of Embodiments 1 to 3]
By the way, the invention of the laminated paper 10 of Embodiments 1 to 3 is mainly characterized in that the printed portion is provided on the inner surface side of the laminated paper 10 (the inner surface of the intermediate layer sheet or the outer layer sheet). That is, the invention of the laminated paper 10 of Embodiments 1 to 3 has a configuration other than the printing section (configuration of the heat-sealing section, etc.) different from that of the above embodiments, as long as such a printing section is provided. can be That is, the laminated paper 10 has a multi-layer structure consisting of an outer layer sheet and an intermediate layer sheet, and as long as the printing portion is provided on the inner surface side, the structure of the heat-sealed portion and the structure of other elements or portions can be changed. Any configuration is possible. For example, in the laminated paper provided with the printing unit of the present invention, the row of heat-sealed portions may be formed in a broken line shape as in the first embodiment, a wavy line shape having another configuration, a dotted line shape, or a single point It can be a chain line made of chain lines such as a chain line or a two-dot chain line, or a line shape such as a zigzag shape or a zigzag shape, or a straight line shape made of solid lines. Alternatively, it can be embodied in laminated paper in which dot-shaped heat-sealed portions are scattered. However, in order to obtain a sufficient expansion effect over the entire laminated paper after the laminated paper absorbs water and to give a sense of volume during use, the row of heat-sealed portions must be formed in a broken line (or a dashed line) as in the above embodiment. It is preferable to use a linear shape such as a shape).

[Invention of laminated paper without a printing unit]
On the other hand, among the configurations of the laminated paper sheet 10 described in the first embodiment, the following configuration alone has novelty and inventiveness in view of the prior art. That is, in addition to the invention of laminated paper having a printing unit as described above (hereinafter referred to as the "first invention of laminated paper"), the thickness of the nonwoven fabric is set within the predetermined range, and the thickness of the crepe paper is The invention of a laminated paper having a thickness within the predetermined range (hereinafter referred to as "second laminated paper invention"), and the widthwise heat-sealed portion interval according to the crepe ratio of the crepe paper The invention of laminated paper within the prescribed range (hereinafter referred to as the "third invention of laminated paper"), even in the invention itself (that is, even if it does not have a printing unit), is novel and novel in view of the prior art. It has progressiveness.

[Second laminated paper invention (thickness range of crepe paper and thickness range of nonwoven fabric)]
Specifically, the second laminated paper invention comprises crepe paper as a pair of outer layer sheets, and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers, The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe creases of the crepe paper extend to form a laminated structure, and the crepe paper is: It has a thickness in the range of 20 to 50 g/m ² , and the nonwoven fabric has a basis weight in the range of 15 to 25 g/m ² .

[Third Laminated Paper Invention (Crepe Rate of Crepe Paper and Spacing Between Heat-Sealed Parts in the Width Direction)]
Further, the third laminated paper invention comprises crepe paper as a pair of outer layer sheets and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers, wherein the crepe paper The crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles extend, and the adjacent heat-sealed portion row The distance between the heat-sealed portions in the width direction, which is the distance between the center lines in the width direction, is set to an arbitrary value within a predetermined range according to the range of the crepe rate of the crepe paper, and the crepe rate of the crepe paper is In the range of 20% to 26%, the distance between the heat-sealed portions in the width direction is set in the range of 10 mm to 15 mm, and the crepe rate of the crepe paper is in the range of 26% to 30%. The distance between the heat-sealed portions in the width direction is set within a range of 15 to 25 mm.

Embodiment 4 (Laminated Paper Having Improved Nonwoven Fabric in Intermediate Layer Sheet)
[Configuration of nonwoven fabric]
The laminated paper of the present invention can also be embodied as follows, which is characterized by the configuration of the nonwoven fabric as the intermediate layer sheet. Specifically, in the laminated paper of Embodiment 4, the nonwoven fabric is made of a highly stretchable nonwoven fabric. That is, conventional nonwoven fabrics are made of so-called pulp nonwoven fabrics, which are produced by accumulating fibrous materials obtained by pulverizing wood pulp into a web and joining them together to form a sheet-like portion. In addition, conventional wet paper towels are generally manufactured from nonwoven fabric, and the nonwoven fabric used is sheet-like with a basis weight of 45 to 70 g/cm 2 .

[Type of nonwoven fabric of the present invention (type by manufacturing method)]
On the other hand, for example, using the cross-sectional view of FIG. 5, the laminated paper 10 of Embodiment 4 uses an air-through type nonwoven fabric containing air (manufactured by thermal bonding) as the intermediate layer sheet. can do. In this way, the laminated paper 10 has a structure that is thick and highly stretchable as a whole, and also has a structure that has good touch feeling and heat-sealability. Furthermore, the nonwoven fabric of the laminated paper of Embodiment 4 is made of a nonwoven fabric manufactured using so-called core-sheath structure composite fiber as a raw material. This core-sheath composite fiber is a short synthetic fiber, and is a raw material for a non-woven fabric web (stacked layer of fibers sometimes called fleece) manufactured by a dry method or the like. In addition to making fibers, as a method for bonding between fibers, an air through method among thermal bonding methods is used (that is, by passing hot air from the surface to the back surface in the thickness direction of the web, the sheath portion of the composite fiber is removed. The fibers are bonded by melting the resin to bond the fibers together. The core-sheath structure fiber is a fiber having an outer sheath made of PE (polyethylene) and an inner (center) core made of PET (polyethylene terephthalate). Since this nonwoven fabric does not use an adhesive for bonding between fibers, it has a soft texture, but does not absorb water. When the laminated paper 10 is soaked with water, the nonwoven fabric 2 does not supply moisture to the printing ink of the printing layer 2a on the surface due to the moisture. Therefore, this laminated paper 10 exerts an additional specific effect that the printing quality of the printed portion of the nonwoven fabric 2 can be maintained satisfactorily. In addition, in this nonwoven fabric, the PE in the sheath softens at a low temperature, and the crepe paper 1 can be well adhered to the heat-sealed portion 11 of the laminated paper 10, while the PET in the core is the fiber itself. Maintain strength to maintain the overall strength of the nonwoven. That is, in this nonwoven fabric, the sheath portion of the core-sheath structure exhibits adhesive strength and functions as an adhesive to crepe paper, while the core portion contributes to maintaining strength.

As a material for the core-sheath structure fiber of this nonwoven fabric, polyethylene (PE) has a melting point of about 120°C (that is, low density PE with a melting point of 95 to 130°C or 114 to 126°C, melting point of 120 to 140°C). Or high density PE of 126-137° C.) can be used, usually low density PE is used, but PE with a density of around 120° C. melting point may be used. On the other hand, polypropylene (PP) having a melting point of about 140° C. (that is, PP having a low melting point) can be used. There are three types of PP: copolymerized random PP, copolymerized block PP, and homopolymerized homo PP. Homo PP has a melting point of 160 to 165 ° C. Since the melting point is 140 to 150° C. (or 160 to 165° C.), block PP having a low melting point is used. Also, random PP having the lowest melting point may have a melting point of about 135-145°C or a melting point of 135-150°C. In this embodiment, random PP can be used as the PP of the raw fibers of the nonwoven fabric, and in this case, the random PP has a low melting point of 125°C.

[Nonwoven fabric types (types by melting point)]
In the laminated paper of the present invention, when an arbitrary nonwoven fabric is used as the intermediate layer sheet, some nonwoven fabrics do not adhere well to crepe paper due to their melting points. Therefore, as the nonwoven fabric 2 of the laminated paper 10, the crepe paper 1 is a heat-sealable component (for example, a core A non-woven fabric having a melting point is used so that it can be reliably adhered to the non-woven fabric 2 by the sheath portion of the sheath-structured fiber (PE, etc.). In particular, the laminated papers of the present invention, including the laminated papers 10 of Embodiments 1 to 3, have a structure in which a pair of crepe papers are bonded to a nonwoven fabric only by the adhesive force of the linear heat-sealed part rows, so that such a small amount The type of nonwoven fabric is selected so that sufficient bonding strength can be obtained between the crepe paper and the nonwoven fabric with a sufficient bonding area. As such a nonwoven fabric, a nonwoven fabric which is a core-sheath type conjugate fiber as a polyester-based conjugate fiber and which is manufactured using heat-fusible fibers for nonwoven fabric can be used. For example, as the nonwoven fabric in this case, a nonwoven fabric manufactured from a core-sheath type composite fiber having a fineness of 2.2 dtex, a cut length of 5 mm or 10 mm, and a softening point of the sheath component of about 110° C. may be used, or a fineness of 1.7 dtex and a cut length of 5 mm. , using a nonwoven fabric manufactured from a core-sheath type composite fiber having a sheath component softening point of about 110°C, or using a nonwoven fabric manufactured from a core-sheath type composite fiber having a fineness of 2.2 dtex, a cut length of 5 mm, and a sheath component softening point of about 130°C. can be used. Alternatively, a nonwoven fabric obtained by appropriately mixing two or more types of the above-mentioned core-sheath type conjugate fibers may be used.

Embodiment 5 (Laminated Paper Manufacturing Apparatus)
The laminated paper of the present invention, including the invention of the laminated paper 10 of Embodiments 1 to 3, is preferably manufactured using the laminated paper manufacturing apparatus described below.

[Configuration of manufacturing equipment]
As shown in FIG. 9, the apparatus for producing laminated paper according to Embodiment 5 has three support rollers 51, 52, and 53 arranged side by side, each of which is a raw material sheet of crepe paper (one of the pair of crepe papers). A roll-shaped crepe paper 21 to be a crepe paper raw material sheet), a roll-shaped nonwoven fabric 22 to be a raw material sheet of the nonwoven fabric (nonwoven fabric raw material sheet), and a raw material sheet of the other crepe paper of the pair of crepe papers (crepe paper raw material sheet ) and the other roll-shaped crepe paper 23 are supported so as to be rotatably supplied. In addition, one crepe paper 1, nonwoven fabric 2, and the other crepe paper 1 pulled out from one roll crepe paper 21, roll nonwoven fabric 22, and the other roll crepe paper 23 are laminated. A raw material sheet (laminated paper raw material sheet) of the laminated paper 10 is constructed with (that is, in a laminated state of three layers). This laminated paper raw material sheet is folded back by a first guide roller 61 and guided and held between a first heat-sealing roller 70 as one pressing roller and a second heat-sealing roller 80 as the other pressing roller. be introduced. The laminated paper material sheet is folded back from the first guide roller 61 to the second heat-seal roller 80 and guided by the second guide roller 62 to be guided by the first heat-seal roller 70 and the second heat-seal roller 70 . is inserted between the heat seal roller 80 of the Before being inserted between the first heat-sealing roller 70 and the second heat-sealing roller 80, the laminated paper raw material sheet is heat-sealed in a state in which the crepe paper 1 and the nonwoven fabric 2 are not heat-sealed. The laminated paper before fusion is 10X.

Next, the laminated crepe paper 1 and the nonwoven fabric 2 are heat-sealed between the first and second heat seal rollers 70 and 80 to form the laminated paper 10 having the heat-sealed portions 11 . The laminated paper raw material sheet in the stage after this heat-sealing is the post-heat-sealing laminated paper 10Y in which the crepe paper 1 and the non-woven fabric 2 are heat-sealed. Then, the long heat-sealed laminated paper 10Y (as base paper before cutting) led out from the first and second heat seal rollers 70 and 80 is passed through the third guide roller 63 and the fourth guide roller 63. It is folded back by the roller 64 and guided to the take-up roller 55 . The take-up roller 55 winds the heat-sealed laminated paper 10Y into the rolled laminated paper 10R. This rolled laminated paper 10R is removed from the take-up roller 55 and used as base paper for wet towels and the like. A slitter is arranged between the fourth guide roller 64 and the take-up roller 55 to cut the heat-sealed laminated paper 10R in the width direction into a plurality of laminated papers 10 having a predetermined width. and is wound on the take-up roller.

[Heat seal roller]
Next, the first and second heat seal rollers 70, 80 will be described in detail with reference to FIGS. 10-13. FIG. 10 shows a state of the first and second heat seal rollers 70 and 80 of FIG. 9 viewed from the top side, and the first and second heat seal rollers 70 and 80 have their axial centers parallel to each other. As shown in FIG. 1, they are arranged side by side in front of and behind in the supply direction of the pre-heat-sealing laminated paper 10X. In addition, the first and second heat seal rollers 70 and 80 have the same predetermined roller length L (for example, the axial length of any value within the range of 1200 mm to 1500 mm), and the same predetermined roller diameter. D (eg, a diameter of any value in the range 180 mm to 300 mm).

[First heat seal roller]
As shown in FIGS. 9 and 10, the first heat-sealing roller 70 is formed in a cylindrical shape having the predetermined roller diameter D, and has a non-press-bonding portion 71 formed on its peripheral surface in the shape of a ring concave groove with a constant width. , and thermocompression-bonding projections 72 in the shape of a broken-line convex ring (or a broken-line convex streak) having a constant width are arranged parallel to each other so as to be alternately arranged in the axial direction. As shown in FIG. 11, each of the non-pressing portions 71 intermittently extends as an arc-shaped surface in the circumferential direction along the peripheral surface of the first heat-sealing roller 70, and is a flat surface in the width direction. It has a surface 72a. Specifically, each of the thermocompression-bonding protrusions 72 linearly extends along the peripheral surface of the first heat-sealing roller 70 for a predetermined length in the circumferential direction (as the peripheral surface of the thermocompression-bonding protrusions 72). The pressing surfaces 72a are arranged continuously at regular intervals in the circumferential direction of the first heat seal roller 70 . The thermocompression-bonding surface 72a of the thermocompression-bonding projection 72 is an arc-shaped surface (curved surface) in the length direction, and the arc length is equal to that of the first heat-bonding portion 11a or the first heat-bonding portion 11a of the heat-bonding portion row 11. It is set to have the same length as the length of the heat-sealed portion 11b of No. 2. The thermocompression-bonding surface 72a of the thermocompression-bonding protrusion 72 is flat in the width direction, but the width thereof is equal to that of the first heat-bonding portion 11a of the heat-bonding portion row 11 or the second heat-bonding portion 11a. The width is set to be the same as the width of the fused portion 11b. Furthermore, the gap between the adjacent thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 72 in each row is the same as the adjacent first thermal bonding portion 11a or the second thermal bonding portion 11a of the thermal bonding portion row 11. It is set to have the same dimension as the gap between the portions 11b.

In this manner, the first heat seal roller 70 forms the thermal compression bonding convex portion 72 in the shape of a broken-line convex ring along the entire circumference in the circumferential direction, thereby forming one row of the thermal bonding portion row 11 of the laminated paper 10. configured to form In addition, the first heat seal roller 70 arranges the multiple rows of heat-sealing protrusions 72 with the same constant interval as the widthwise arrangement interval of the multiple rows of heat-sealed portion rows 11 of the laminated paper 10 . They are continuously arranged side by side over the entire axial direction so as to be parallel. As a result, the first heat seal roller 70 has the non-press-bonded portions 71 formed in the shape of ring grooves between the adjacent thermally-pressed protrusions 72 . The first heat-sealing roller 70 extends along the entire axial direction so that the multiple rows of non-bonded portions 71 are parallel to each other at the same intervals as the non-bonded portions 12 of the laminated paper 10 . They are arranged side by side continuously. Furthermore, in the first heat seal roller 70, the thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 72 in adjacent rows are arranged so that the center position of the thermocompression bonding surface 72a of one thermocompression bonding protrusion 72 in the length direction is the same as that of the other thermocompression bonding surface 72a. The positions of the first heat seal rollers 70 in the circumferential direction are shifted from each other so that the first heat seal rollers 70 are positioned at intermediate positions between the adjacent thermocompression bonding surfaces 72 a of the thermocompression bonding protrusions 72 . As a result, as shown in FIGS. 11, 12, and 13, the thermal compression bonding protrusions 72 are formed in the thermal compression bonding protrusions of the first row corresponding to the thermal bonding portion rows 11A of the first row of the laminated paper 10. It is composed of a portion 72A and a second row of thermocompression-bonding protrusions 72B corresponding to the second row of heat-sealed portion rows 11B. Then, the first heat-sealing convex portion 72A of the first row has a heat-sealing surface 72a corresponding to the first heat-sealing portion 11a of the heat-sealing portion row 11A of the first row. 70, and the second row of thermo-compression convex portions 72B has a thermo-compression bonding surface 72a corresponding to the second heat-sealed portion 11b of the second row of heat-sealed portion rows 11B. It is arranged in the circumferential direction of the first heat seal roller 70 .

Further, as shown in FIG. 10, the thermal compression bonding surface 72a of the thermal bonding protrusion 72 extends linearly in a plan view (in the circumferential direction of the second heat sealing roller 70, it is curved along the circumferential surface). ) and semicircular curved portions 72y at both longitudinal ends of the straight narrow strip portion 72x. As a result, the laminated paper 10 obtained by thermally compressing and heat-sealing the crepe paper raw material sheet of the laminated paper raw material sheet to the non-woven fabric raw material sheet by the thermal compression bonding surface 72 a of the thermal compression convex portion 72 of the heat seal roller 70 is heat-fused. Each of the heat-sealed portions 11a and 11b of the bonding portion row 11 is arranged in the longitudinal direction of the laminated paper 10 corresponding to the outer shape of each thermocompression bonding surface 72a, as shown in FIGS. and semi-circular portions at both longitudinal ends of the straight strip-shaped portion. Furthermore, as shown in FIG. 13, a pair of side surfaces 72b extends perpendicularly to the thermocompression bonding surface 72a on both sides in the width direction of the thermocompression bonding surface 72a of each thermocompression bonding protrusion 72. As shown in FIG.

[Second heat seal roller]
On the other hand, as shown in FIGS. 9 and 10, the second heat-sealing roller 80 is formed in a cylindrical shape having the predetermined roller diameter D, and has a non-pressure-bonding groove formed on the peripheral surface thereof in the shape of a ring groove having a constant width. A portion 81 and a thermocompression-bonding convex portion 82 having a convex ring shape (or a convex strip shape) with a constant width are arranged parallel to each other so as to be alternately arranged in the axial direction. As shown in FIG. 11, each of the non-press-bonded portions 81 is formed continuously as an arc-shaped surface in the circumferential direction along the circumferential surface of the second heat-sealing roller 80 (that is, the circumferential surface of the second heat-sealing roller 80). It has a compression bonding surface 82a (peripheral surface of the thermocompression bonding convex portion 82) which extends over the entire circumference of the surface and is flat in the width direction. A thermocompression-bonding surface 82a of the thermocompression-bonding protrusion 82 is an arcuate surface (curved surface) in the length direction. The thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82 is flat in the width direction, but the width is equal to that of the first heat-bonding portion 11a of the heat-bonding portion 11 or the second heat-bonding portion 11a. The width is set to be larger than the width of the attachment portion 11b (that is, the width is larger than the width of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat seal roller 70).

Thus, the second heat-sealing roller 80 has the ring-shaped thermocompression-bonding projections 82 at positions facing the thermocompression-bonding projections 72 of the first heat-sealing roller 70 . formed over the As a result, the pre-heat-sealed laminated paper 10X is sandwiched between the heat-sealing projections 72 of the first heat-sealing roller 70 and the heat-sealing projections 82 of the second heat-sealing roller 80, and the heat-sealing projections are formed. The crepe paper 1 of the laminated paper 10X before heat-sealing is heat-sealed and heat-sealed to the non-woven fabric 2 between the heat-sealed surface 72a of the portion 72 and the heat-sealed surface 82a of the heat-sealed convex portion 82, so that the lamination is performed. A row 11 of heat-sealed portions of the paper 10 is formed.

Furthermore, as shown in FIG. 13, the width of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 of the second heat seal roller 80 is equal to the width of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat seal roller 70. The width is set to be larger than the width by a certain dimension, and the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 and the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 are opposed to each other (the thickness of the thermal bonding portion 11 of the laminated paper 10 When the thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 72 are arranged in substantially close contact with each other with a gap of 100 mm, the widthwise ends of the thermocompression bonding surfaces 82a of the thermocompression bonding protrusions 82 are respectively on both sides of the thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 82 in the width direction. A constant width portion is exposed. As a result, the crepe paper 1 of the pre-heat-sealing laminated paper 10X is heat-sealed and heat-sealed to the non-woven fabric 2 between the heat-sealed surface 72a of the heat-sealed projection 72 and the heat-sealed surface 82a of the heat-sealed projection 82. When this is done, both widthwise edges of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 are arranged on the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82, and the thermocompression bonding surface of the thermocompression bonding convex portion 72 is placed on the thermocompression bonding surface 82a. It is possible to greatly reduce the external force (especially shear force) applied to the pre-heat-sealing laminated paper sheets 10X from both edges in the width direction of 72a. That is, if the width of the thermocompression-bonding surface 72a of the thermocompression-bonding protrusion 72 and the width of the thermocompression-bonding surface 82a of the thermocompression-bonding protrusion 82 are set to be the same width, the thermocompression-bonding surface 72a of the thermocompression-bonding protrusion 72 and the thermocompression bonding surface 72a of the thermocompression bonding protrusion 72 have the same width. When the crepe paper 1 of the pre-heat-sealing laminated paper 10X is heat-sealed and heat-sealed to the non-woven fabric 2 between the heat-sealing protrusions 82 and the heat-pressing surfaces 82a of the heat-sealing protrusions 82, the heat-pressing surfaces 72a of the heat-sealing protrusions 72 Both edges in the width direction are arranged at the same position as both edges in the width direction of the thermocompression bonding surface 82a of the thermocompression bonding protrusion 82. Since the external force (particularly shear force) applied to the pre-fusing laminated paper 10X increases, there is a possibility that part of the pre-fusing laminated paper 10X (particularly the crepe paper 1) may be cut or damaged. However, as shown in FIG. By setting the width to be larger than the width by a certain dimension, such a problem can be reliably prevented. On both sides in the width direction of the thermocompression bonding surface 82a of the thermocompression bonding protrusion 82 of the second heat seal roller 80, a pair of side surfaces 82b are inclined at a predetermined angle (obtuse angle) with respect to the thermocompression bonding surface 82a. at an angle). As described above, in the laminated paper manufacturing apparatus, the heat-sealing surfaces 72a, 82a of the heat-sealing protrusions 72, 82 are heated by the lower heat-sealing roller 80 more than the heat-sealing surface 72a of the heat-sealing roller 70 on the upper side. The pressing surface 80 is widened, and the corners of both edges in the width direction of the heat-sealing protrusions 92 of the lower heat-sealing roller 80 are cut (notched) to form a tapered (chamfered) or rounded shape. A cut shape such as (curved chamfered shape) is preferable.

[Roller length and roller diameter]
The roller length L of the heat seal rollers 70, 80 is preferably in the range of 1200 mm to 1500 mm. If the roller diameter D of the heat seal rollers 70 and 80 is less than 1200 mm, the productivity may decrease. On the other hand, if the roller length L of the heat seal rollers 70, 80 exceeds 1500 mm, there is a possibility that the problem of the crown phenomenon, which will be described later, will occur. Also, the roller diameter D of the heat seal rollers 70, 80 is preferably in the range of 180 mm to 300 mm. If the roller diameter D of the heat seal rollers 70 and 80 is less than 180 mm, there is a possibility that the pressing force of the thermal compression protrusions 72 and 82 on the heat-sealed portions of the pre-heat-sealed laminated sheets 10X may be insufficient. On the other hand, if the roller diameter D of the heat seal rollers 70, 80 exceeds 300 mm, the problem of high cost occurs.

[Relationship between heat seal roller diameter, roller length, and pressing force during thermocompression bonding]
In the heat-sealing operation of the pre-heat-sealing laminated paper 10X by the heat-sealing rollers 70 and 80, the roller diameter D and roller length L of the heat-sealing rollers 70 and 80 cause the heat-sealing convex portions 72 and 82 to be stacked before heat-sealing. The present inventors have found that the pressing force applied to the heat-sealed portion of the paper 10X changes. In addition, in the thermal compression bonding operation of the pre-heat sealing laminated paper sheets 10X by the heat seal rollers 70 and 80, the present inventor applies heat from the thermal compression protrusions 72 and 82 to the thermal bonding portion of the pre-thermal bonding laminated paper sheets 10X. The pressing force (hereinafter referred to as "pressing force during thermocompression bonding") is set to , at least 2 to 3 atm or more. Further, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, it is preferable that the pressing force at the time of thermocompression bonding is within the range of 5.5 to 7.0 atmospheres. That is, when the roller length L of the heat-sealing rollers 70, 80 is 1400 mm, the pre-heat-sealing laminated paper 10X has sufficient durability up to a pressure of 5 to 7 atmospheres when heat-sealed by the heat-sealing rollers 70, 80. Therefore, this range is optimum for the pressing force during the thermocompression bonding. If the pressing force during thermocompression bonding is 7 atmospheres or more, the pre-thermal bonding laminated paper 10X may be damaged (for example, it may be torn at a part corresponding to the corner of the thermocompression bonding surface 72a of the thermocompression convex portion 72). have a nature.

Further, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, if the pressing force during thermocompression bonding is 7 atmospheres or more, the so-called crown phenomenon occurs in the heat seal rollers 70 and 80 (the diameter of the heat seal rollers 70 and 80 increases). There is also a possibility that a phenomenon in which a gap is formed between the heat seal rollers 70 and 80 due to bending in the direction may occur. When this crown phenomenon occurs, the heat-sealing rollers 70 and 80 are curved in the radial direction, and a drum-shaped gap is generated between the heat-sealing rollers 70 and 80 when viewed from the front. In this case, the gap between the heat seal rollers 70 and 80 in the radial direction is very small. gap will occur. Therefore, although the gap between the heat-sealing rollers 70 and 80 due to this crown phenomenon is a minute gap of 1 mm or less, since the thickness of the laminated paper raw material sheet (laminated paper 10X before heat-sealing) is as thin as 1 mm or less, heat sealing is possible. The thermal compression surfaces 72a, 82a of the rollers 70, 80 may be in a state of floating from the pre-thermally-sealed laminated paper 10X, and a gap may be generated between them. The heat-sealed portions of the pre-heat-sealed laminated sheets 10X cannot be pressure-bonded by the pressure-bonding surfaces 72a and 82a.

Therefore, in order to avoid such a problem of the crown phenomenon, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, the pressing force during thermocompression bonding should be 5.5 to 7.0 mm as described above. It is preferably within the atmospheric pressure range. When the roller length L of the heat seal rollers 70 and 80 is set to 1400 mm and the pressing force at the time of thermocompression bonding is set to less than 5.5 atmospheres, the convex portions 72 and 82 thermally bond the laminated paper sheet 10X before heat fusion. There is a possibility that the part cannot be formed stably (that is, the adhesion strength of the heat-sealed part may be insufficient). On the other hand, when the roller length L of the heat seal rollers 70 and 80 is set to 1400 mm, if the pressing force at the time of thermocompression bonding exceeds 7 atmospheres, excessive pressure will be applied to the heat-sealed portion of the pre-heat-sealed laminated paper 10X. In addition, the heat-sealed portion may harden during adhesion. Further, when the roller length L of the heat seal rollers 70 and 80 is set to 1200 mm, the pressing force during thermocompression bonding can be set to 4.5 atmospheres. Further, when the roller length L of the heat seal rollers 70 and 80 is set to 1500 mm, the pressing force at the time of thermocompression may be in the range of 7.5 to 8.0 atmospheres. When the roller length L of the heat seal rollers 70 and 80 is set to 1500 mm and the pressing force at the time of thermal compression bonding is less than 7.5 atmospheres, the thermal compression protrusions 72 and 82 thermally bond the laminated sheets 10X before thermal bonding. There is a possibility that the part cannot be formed stably (that is, the adhesion strength of the heat-sealed part may be insufficient). On the other hand, when the roller length L of the heat seal rollers 70 and 80 is set to 1500 mm, if the pressing force at the time of heat-sealing exceeds 8 atm, excessive pressure will be applied to the heat-sealed portion of the pre-heat-sealed laminated paper 10X. In addition, the heat-sealed portion may harden during adhesion.

[Temperature control of heat seal roller]
In the laminated paper manufacturing apparatus, the crepe paper as the outer layer sheet and the intermediate layer sheet (non-woven fabric, impermeable sheet, etc.) are reliably heat-sealed at the heat-sealed portion of the pre-heat-sealed laminated paper 10X. The temperature of the seal rollers 70 and 80 during thermocompression bonding (hereinafter referred to as “thermocompression temperature”) is set within the range of 175 to 200° C., and the temperature distribution is in the lengthwise direction of the heat seal rollers 70 and 80. It is preferable to control the temperature so that it is constant throughout the . When the heat-sealing rollers 70 and 80 have a heat-sealing temperature of 175° C. or less, the crepe paper and the non-woven fabric cannot be reliably heat-sealed at the heat-sealed portion of the laminated paper before heat-sealing 10X. On the other hand, if the thermocompression bonding temperature is 200°C or higher, the heat-adhesive resin (PP (polypropylene), PE (polyethylene), etc.) of the intermediate layer sheet may harden and deteriorate, or the intermediate layer sheet itself such as a non-woven fabric may harden and heat. There is a possibility that the fusible fibrous material (heat-fusible synthetic resin fiber) will not exhibit the fusing function (that is, it will not be possible to bond the crepe paper by fusing). Further, as shown in FIG. 15(a), the heat-sealing temperature of the heat-sealing rollers 70, 80 varies depending on the rotation speed of the heat-sealing rollers 70, 80 (that is, the supply speed of the pre-heat-sealing laminated paper 10X, in other words, , the forming speed in the lengthwise direction of the heat-sealed portion), the temperature control and rotation control of the heat seal rollers 70 and 80 are preferably performed in the laminated paper manufacturing apparatus.

[Rotation control of heat seal roller]
In the laminated paper manufacturing apparatus, the crepe paper as the outer layer sheet and the intermediate layer sheet (non-woven fabric, impermeable sheet, etc.) are reliably heat-sealed at the heat-sealed portion of the pre-heat-sealed laminated paper 10X. After the seal rollers 70 and 80 reach the thermocompression bonding temperature within the above set range, the heat seal rollers 70 and 80 are started to rotate to form the heat-sealed portion of the pre-heat-sealed laminated paper 10X. do. In addition, the heat-sealing rollers 70, 80 are controlled so that the heat-sealing temperature is constant within the above set range. It is preferable to control by increasing or decreasing according to the thickness of the paper 10X). That is, as shown in FIG. 15(c), the rotational speed of the heat seal rollers 70 and 80 is increased or decreased in proportion to the thickness (base paper thickness) of the pre-heat-sealed laminated paper 10X in the laminated paper manufacturing apparatus. It is preferable to control the rotation of the heat seal rollers 70 and 80 . Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is kept constant, and the rotational speed of the heat seal rollers 70 and 80 (feed speed of the original paper) is increased or decreased according to the thickness of the original paper. Similarly, as shown in FIG. 15(d), the rotational speed of the heat-sealing rollers 70 and 80 is increased or decreased in proportion to the thickness (thickness of the nonwoven fabric) of the nonwoven material sheet of the pre-heat-sealing laminated paper 10X. Rotation control of the heat seal rollers 70 and 80 can also be performed in the paper manufacturing apparatus. Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is kept constant, and the rotation speed (feed speed of the base paper) of the heat seal rollers 70 and 80 is increased or decreased according to the thickness of the nonwoven fabric. Furthermore, as shown in FIG. 15(b), the heat-sealing rollers 70 and 80 are heated so that the temperature of the heat-sealing rollers 70 and 80 increases or decreases in proportion to the thickness of the non-woven fabric of the pre-heat-sealing laminated paper 10X (thickness of the non-woven fabric). Temperature control of the heat seal rollers 70 and 80 can also be performed in the manufacturing equipment. Also in this case, the rotation speed of the heat seal rollers 70, 80 is kept constant, and the thermocompression bonding temperature of the heat seal rollers 70, 80 is increased or decreased according to the thickness of the nonwoven fabric. Here, the heat-sealing speed (the length per unit time of the heat-sealed portion row formed on the pre-heat-sealed laminated paper sheet 10X) by the heat-sealing roller is preferably 20 m/min, for example.

[Uniform temperature control]
As described above, the laminated paper manufacturing apparatus controls the heat-sealing temperature of the heat-sealing rollers 70 and 80 so that the heat-sealing rollers 70 and 80 have a uniform temperature distribution, and the heat-sealing portion As a configuration for this temperature control, the configuration shown in FIG. 12 can be adopted. Specifically, as shown in FIG. 11, the heat seal rollers 70 and 80 each have a cylindrical shape with both ends closed by a peripheral wall and a pair of side walls 73 and 83. As a result, as shown in FIG. In addition, sealed spaces 70S and 80S are formed inside the heat seal rollers 70 and 80, respectively. The internal spaces 70S, 80S of the heat seal rollers 70, 80 are closed spaces maintained in a vacuum state. In the laminated paper manufacturing apparatus, the internal spaces 70S and 80S of the heat seal rollers 70 and 80 are connected to external water supply means, respectively, and the internal spaces 70S and 70S of the heat seal rollers 70 and 80 are supplied from the water supply means. Moisture is supplied to each of the heat seal rollers 70 and 80S, and when the heat seal rollers 70 and 80 are heated, steam obtained by heating the moisture is used to keep the temperature of the heat seal rollers 70 and 80 constant. It's becoming For example, in the laminated paper manufacturing apparatus, a predetermined amount of water is stored in advance in the internal spaces 70S and 80S of the heat seal rollers 70 and 80, and the water is heated when the heat seal rollers 70 and 80 are heated. The obtained steam is used to keep the temperature of the heat-sealing rollers 70, 80 constant, or when the heat-sealing rollers 70, 80 are in operation, saturated steam or superheated steam is supplied to the internal spaces 70S, 80S. Then, the steam is used to keep the temperature of the heat seal rollers 70 and 80 constant. In this case, high-temperature steam (for example, saturated steam) is applied to the inner surfaces of the heat seal rollers 70 and 80 in a thin layer or film, and the layer or film of steam causes the entire heat seal rollers 70 and 80 to become wet. It is designed to maintain a uniform temperature. Then, in the laminated paper manufacturing apparatus, the heat seal rollers 70 and 80 are heated by a predetermined heating means to raise the temperature to the above-described thermocompression bonding temperature before the heat seal rollers 70 and 80 start the thermocompression bonding operation. For example, in a laminated paper manufacturing apparatus, an induction coil is wound inside the heat seal rollers 70 and 80, and an alternating current is output to the induction coil to induce and generate an eddy current in the heat seal rollers 70 and 80. Thus, the heat seal roller is heated to the predetermined thermocompression bonding temperature by Joule heat generation, and controlled to keep the predetermined temperature constant. Then, in addition to the induction heating by the induction heating means, the temperature stabilization operation by the water vapor causes the heat seal rollers 70 and 80 to be heated over the entire circumferential direction and the entire length direction (in particular, all the It is controlled so that the predetermined thermocompression bonding temperature is maintained uniformly and evenly over the entire surface of the thermocompression bonding surfaces 72a, 82a of the thermocompression bonding protrusions 72, 82. FIG. Thereby, the temperature distribution of the thermocompression bonding surfaces 72a, 82a of the thermocompression bonding projections 72, 83 of the heat seal rollers 70, 80 is maintained absolutely the same (uniform) over the entire surface. The heating means (heating heater) of the heat seal rollers 70 and 80 preferably has the electric structure as described above (for example, the induction heating structure such as the induction heating means). By doing so, it is possible to avoid the risk of oil leakage as in the case where the heating means is of the oil heater type. can contribute to the stabilization of

Further, in the laminated paper manufacturing apparatus, the pressing force of the heat seal rollers 70 and 80 at the time of thermocompression bonding is particularly set to It is controlled to be constant over the entire surface of the opposing surface. In this manner, the laminated paper manufacturing apparatus preferably controls the temperature distribution of the heat seal rollers 70 and 80 and the pressure distribution at the same time. It is possible to minimize adhesion unevenness in each of the heat-sealed portions 11a and 11b.

[Method for producing laminated paper]
The laminated paper of the present invention, including the invention of the laminated paper 10 of Embodiments 1 to 3, is preferably manufactured by the laminated paper manufacturing method described below. Note that the laminated paper manufacturing apparatus of Embodiment 5 can be suitably used for this laminated paper manufacturing method.

Embodiment 6 (Another Example of Laminated Paper Manufacturing Apparatus)
In the laminated paper manufacturing apparatus of Embodiment 5, a pair of heat seal rollers 70 and 80 are used as means for forming the heat-sealed portion rows 11 of the laminated paper 10 (hereinafter referred to as "heat-sealing means"). However, as a heat-sealing means for forming the heat-sealed portion row 11 of the laminated paper 10, besides this structure, high-frequency welding or ultrasonic welding can be used to bond crepe paper. It is possible to employ a configuration in which the intermediate layer sheet such as a non-woven fabric is adhered (by the fusion bonding operation of the heat-sealing component of the intermediate layer sheet). According to these heat-sealing means using high-frequency welding or ultrasonic welding, it is easy to adjust the bonding temperature by heat-sealing, there is a wide variety of materials, and the thermoplastic resin film sheet with a low melting point is inexpensive. materials may be available. For example, in the laminated paper manufacturing apparatus shown in FIG. 16, the heat-sealing means is provided with a high-frequency sewing machine as a high-frequency welding means. The laminated paper manufacturing apparatus of the sixth embodiment is basically the same except that the pair of heat seal rollers 70 and 80 of the laminated paper manufacturing apparatus of the fifth embodiment shown in FIG. has the same configuration as the laminated paper manufacturing apparatus of Embodiment 5, and has a three-layer structure (three-ply structure) in which a nonwoven fabric 2 is interposed between a pair of crepe papers 1 before heat-sealing lamination The paper 10X is guided and fed to the high-frequency sewing machine 100 by the guide rollers 61 and 62, and the high-frequency sewing machine 100 forms the heat-sealed section row 11 at a predetermined position of the heat-sealing laminated paper 10. After fusion bonding, the laminated paper 10Y is guided by the guide rollers 63 and 64 and wound around the take-up roller 55. As shown in FIG.

[High frequency sewing machine]
A high-frequency sewing machine 100 has a first fusing roller 101 and a second fusing roller 102 arranged opposite to each other. 10X is sandwiched and high-frequency welding is performed to form the heat-sealed portion row 11 . At this time, the high-frequency current (for thermal welding) applied to the first fusing roller 101 and the second fusing roller 102 is as described in the laminated paper manufacturing apparatus and laminated paper manufacturing method of the fifth embodiment. In addition, it is preferable to perform various controls so as to keep the temperature constant according to various conditions such as the thickness of the base paper and the thickness of the nonwoven fabric.

[Another aspect of the present invention]
The present invention can also be grasped as the invention of the laminated paper, the method for producing the laminated paper, or the apparatus for producing the laminated paper described below.

First, the laminated paper according to the first aspect of the present invention comprises crepe paper as a pair of outer layer sheets, and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers, The crepe paper is heat-sealed to the intermediate layer sheet by linear heat-sealed portion rows extending in a direction orthogonal to the direction in which the crepe creases of the crepe paper extend to form a laminated structure. Further, in the laminated paper of the present invention, a printed portion is provided on the inner surface of the intermediate layer sheet or the crepe paper, and the thickness of the crepe paper is adjusted so that the printed portion is the crepe paper when the crepe paper is in a wet state. The thickness is set so that it can be visually recognized from the outside through the paper.

A method for producing a laminated paper according to a second aspect of the present invention is the method for producing a laminated paper according to claim 1, wherein the intermediate layer sheet is made of nonwoven fabric, and the nonwoven fabric raw material sheet, which is the raw material sheet of the nonwoven fabric, is produced. In order to compensate for the shrinkage of the printing part during printing, a nonwoven raw material sheet having a width larger than the width of the laminated paper to be actually obtained by a predetermined ratio is used according to the shrinkage rate.

A laminated paper manufacturing apparatus according to a third aspect of the present invention is the laminated paper manufacturing apparatus according to the first aspect, wherein the pair of first and second A heat-sealing roller is provided, and the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion, and the peripheral surface of the thermocompression-bonding convex portion is used as a thermocompression-bonding surface, The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing. The width of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller is the width of the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat seal roller. The width is set to be larger than the width by a certain dimension.

In another aspect, the laminated paper of the present invention comprises crepe paper as a pair of outer layer sheets, and a heat-fusible intermediate layer sheet disposed between the crepe papers in a laminated state, wherein the crepe The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the paper extend to form a laminated structure, and one crepe paper as the outer layer sheet. A printed portion is provided on the surface of the intermediate layer sheet facing the crepe paper, and the thickness of the crepe paper is measured by the printed portion provided on the surface of the intermediate layer sheet when the crepe paper is in a wet state. The thickness is set so that it can be seen from the outside, and even when the crepe paper is dry, the printed portion provided on the intermediate layer sheet can be seen from the outside through the crepe paper, and when the crepe paper contains water, the The crepe paper is such that the transparency of the printed portion provided on the intermediate layer sheet from the crepe increases, and the visibility of the printed portion provided on the intermediate layer sheet from the outside through the crepe paper increases. Among them, at least the thickness of the crepe paper on the side of the intermediate layer sheet on which the printed portion is provided is set. The laminated paper of the present invention comprises crepe paper as a pair of outer layer sheets and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the extending direction of the crepe paper to form a laminated structure, and the intermediate layer sheet or the crepe paper A printed portion may be provided on the inner surface, and the thickness of the crepe paper may be set so that the printed portion can be visually recognized from the outside through the crepe paper when the crepe paper is in a wet state. can.

A method for producing laminated paper according to another aspect of the present invention is the method for producing laminated paper according to the above aspect, wherein the intermediate layer sheet is made of nonwoven fabric, and the nonwoven fabric has an outer sheath made of polyethylene and an inner side made of polyethylene. A non-water-absorbent air-through nonwoven fabric manufactured by bonding core-sheath structure conjugate fibers whose core is polyethylene terephthalate without using an adhesive by an air-through method, and the printing unit uses a printing method Using flexographic printing technology as a printing ink, forming using water-based ink or ultraviolet curable ink as printing ink, and compensating for shrinkage during printing of the printed part on the nonwoven raw material sheet, which is the raw material sheet of the nonwoven fabric , according to the shrinkage ratio, the printed portion is printed on the nonwoven fabric using a nonwoven fabric raw material sheet having a width that is larger than the width of the laminated paper to be actually obtained by a predetermined ratio. In the method for producing a laminated paper of the present invention, the intermediate layer sheet is made of a nonwoven fabric, and in order to compensate for the shrinkage of the nonwoven fabric raw material sheet, which is the raw material sheet of the nonwoven fabric, when the printing part is printed, the shrinkage rate is Accordingly, it is also possible to use a nonwoven raw material sheet having a width that is larger than the width of the laminated paper to be actually obtained by a predetermined ratio.

A laminated paper manufacturing apparatus according to another aspect of the present invention is the laminated paper manufacturing apparatus according to the above-described another aspect, wherein a pair of first and second heats for forming the row of heat-sealed portions is provided. A sealing roller is provided, and the first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion, and the peripheral surface of the thermocompression-bonding convex portion is used as a thermocompression bonding surface, and the first heat-sealing roller has a thermocompression bonding surface. The heat-sealing roller 2 has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding protrusion is attached to the first heat-seal roller. and the width of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller is the width of the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat seal roller It is set to a width that is larger than the width by a certain dimension.

Alternatively, the present invention can also be grasped as an invention of a laminated paper, a laminated paper manufacturing method, or a laminated paper manufacturing apparatus described below.

First, the present invention comprises crepe paper as a pair of outer layer sheets and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe papers, and the direction in which the crepe creases of the crepe paper extend. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the to form a laminated structure, and a printed portion is formed on the inner surface of the intermediate layer sheet or the crepe paper. and the thickness of the crepe paper is set to a thickness such that the printing unit can be visually recognized from the outside through the crepe paper when the crepe paper is in a wet state. can also

Further, in the above invention, the intermediate layer sheet is made of a material that allows the printed portion to be printed, and a crepe paper as the outer layer sheet to be heat-sealed and bonded by the heat-sealing portion row. and the printed portion is provided on the surface of the nonwoven fabric facing one crepe paper as the outer layer sheet.

Further, the above invention can also be understood as a laminated paper characterized in that the printing portion is provided on the inner surface of one crepe paper as the outer layer sheet.

Further, in the above invention, the intermediate layer sheet is made of a non-permeable sheet made of synthetic resin that blocks permeation of moisture and/or oil, and the printing part is provided on the non-permeable sheet as the intermediate layer sheet. It can also be grasped as a laminated paper characterized by being

The above invention can also be understood as a laminated paper characterized in that the nonwoven fabric has a basis weight and a thickness within the range of 15 to 25 g/m ² .

The invention can also be understood as a laminated paper characterized in that the crepe paper has a thickness within the range of 20 to 50 g/m ² .

Further, in the above invention, the widthwise heat-sealed portion interval, which is the space between the widthwise center lines of the adjacent heat-sealed portion rows, is set within a predetermined range according to the range of the crepe ratio of the crepe paper. When the crepe rate of the crepe paper is set to an arbitrary value and the crepe rate is in the range of 20% to 26%, the widthwise heat-sealed portion interval is set in the range of 10 mm to 15 mm, and the crepe paper When the crepe rate is in the range of 26% to 30%, the widthwise heat-sealed portion interval can be understood as a laminated paper characterized by being set in the range of 15 to 25 mm.

Further, the present invention is the method for producing a laminated paper according to the above invention, wherein the intermediate layer sheet is made of a nonwoven fabric, and shrinkage of the nonwoven fabric raw material sheet, which is the raw material sheet of the nonwoven fabric, is compensated for by the printing part during printing. Therefore, according to the shrinkage rate, it can be grasped as a laminated paper manufacturing method characterized by using a nonwoven fabric raw material sheet having a width that is larger than the width of the laminated paper to be actually obtained by a predetermined ratio. .

Further, the present invention is a laminated paper manufacturing apparatus according to the above invention, comprising a pair of first and second heat seal rollers for forming the row of heat-sealed portions, wherein the first heat seal roller The roller has a ridge-shaped thermocompression-bonding protrusion corresponding to the heat-bonding portion, and the peripheral surface of the thermocompression-bonding protrusion is used as a thermocompression-bonding surface. It has a ridge-shaped thermocompression bonding convex portion facing the thermocompression bonding convex portion of the heat seal roller, and the peripheral surface of the thermocompression bonding convex portion is used as a thermocompression bonding surface facing the thermocompression bonding surface of the first heat seal roller. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller by a fixed dimension. It can also be grasped as a laminated paper manufacturing apparatus characterized by

By the way, to explain the present invention according to another aspect, the laminated paper according to the first aspect of the present invention includes a pair of crepe papers as outer layer sheets and a layered state disposed between the pair of crepe papers. The crepe paper is made of a nonwoven fabric as a heat-fusible intermediate layer sheet, and the crepe paper is attached to the intermediate layer sheet by a linear heat-fusible section row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend. A laminated structure is formed by heat-sealing, the crepe rate of the crepe paper is set within a range of 20% to 30%, and the heat-sealed portion interval in the width direction of the heat-sealed portion rows is 10 mm to 25 mm. , and within the range of the widthwise distance between the heat-sealed parts, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

In addition, to explain the present invention according to another aspect, the laminated paper according to the second aspect of the present invention includes a pair of crepe papers as outer layer sheets, and a layered state disposed between the pair of crepe papers. The crepe paper is made of a nonwoven fabric as a heat-fusible intermediate layer sheet, and the crepe paper is attached to the intermediate layer sheet by a linear heat-fusible section row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend. When the crepe rate of the crepe paper is in the range of 20% to 26%, the heat-sealed portion interval in the width direction of the heat-sealed portion rows is in the range of 10 mm to 15 mm. and when the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm, and Within the range of the distance between the heat-sealed portions in the width direction, the distance between the heat-sealed portions in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

The laminated paper of the present invention can be suitably applied to the use of wet paper towel products by the method for producing laminated paper and the apparatus for producing laminated paper. It can be applied to wet paper products such as Kannon folds, but in addition to this, it is also possible to commercialize the roll-shaped base paper as it is and use it as the base paper for automatic wet paper towel manufacturing machines. In addition to products, it can also be applied to sanitary goods used for purposes such as care and nursing.

1: crepe paper, 2: non-woven fabric (heat-fusible sheet)
10, 40, 50, 60, 70, 80: laminated paper 11, 12, 41, 42, 51, 61, 82: heat-sealed portions 11a, 12a, 41a, 42a, 51a, 61a, 82a: long point 11b, 12b, 41b, 42b, 51b, 61b, 82b: non-fused portion 30: second heat seal roller (heat seal roller)
31: First heat seal portion (heat seal portion)
32: Second heat seal portion (heat seal portion)
31a, 32a: pressing projections, 31b, 32b: non-pressing portions

Claims (51)

A product obtained by processing laminated paper,
The laminated paper is
Crepe paper as a pair of outer layer sheets,
A nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the pair of crepe papers,
The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure,
The crepe ratio of the crepe paper is set within the range of 20% to 30%, and the heat-sealed section interval in the width direction of the heat-sealed section row is set within the range of 10 mm to 25 mm,
Processed laminated paper characterized in that the widthwise distance between heat-sealed parts is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the distance between the heat-sealed parts in the width direction. product. A product obtained by processing laminated paper,
The laminated paper is
Crepe paper as a pair of outer layer sheets,
A nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the pair of crepe papers,
The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure,
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 10 mm to 15 mm,
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm,
Processed laminated paper characterized in that the widthwise distance between heat-sealed parts is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the distance between the heat-sealed parts in the width direction. product. The row of heat-sealed portions includes first heat-sealed portions having a constant length and a constant width, and arranged in a broken line at regular intervals in the length direction. A second heat-sealed portion having the same constant length and constant width as a straight line segment is attached to the first heat-sealed portion so that the intermediate position of each second heat-sealed portion is the first It is arranged by shifting the position so that it is in a position that matches the intermediate position of the interval between the heat-sealed parts of
The length of each heat-sealed portion is set within a range of 35 mm to 45 mm,
The width of each heat-sealed portion is set within a range of 1.5 mm to 2.5 mm,
3. The processed laminated paper according to claim 1 or 2, wherein the aspect ratio, which is the ratio of the length to the width of each heat-sealed portion, is set within a range of 13:1 to 23:1. A product that will last. In each row of heat-sealed portions, the heat-sealed portion interval, which is the interval between the heat-sealed portions adjacent in the length direction, is set within a range of 18 mm to 22 mm,
4. A product made by processing laminated paper according to claim 3, wherein the ratio of the length of each heat-sealed portion to the distance between the heat-sealed portions is set to 2:1. The row of heat-sealed portions includes first heat-sealed portions each having a constant length and a constant width and having the shape of a straight line segment arranged in a broken line at regular intervals in the length direction. A second heat-sealed portion having the same constant length and constant width as a straight line segment is attached to the first heat-sealed portion so that the intermediate position of each second heat-sealed portion is the first It is arranged by shifting the position so that it is in a position that matches the intermediate position of the interval between the heat-sealed parts of
3. A product obtained by processing laminated paper according to claim 1 or 2, wherein each heat-sealed portion of said heat-sealed portion row has a flat semicircular curved shape at both longitudinal ends thereof. . The thickness of the crepe paper is set in the range of 20 to 50 g / m2 in basis weight,
The product obtained by processing the laminated paper according to any one of claims 1 to 5, wherein the thickness of the nonwoven fabric is set within a range of 15 to 25 g/m2 in basis weight. When the crepe rate of the crepe paper is in the range of 20% to 26%, the widthwise heat-sealed portion interval is set in the range of 10 mm to 15 mm,
Claims 1 to 6, wherein when the crepe ratio of the crepe paper is in the range of 26% to 30%, the interval between the heat-sealed portions in the width direction is set in the range of 15 to 25 mm. A product obtained by processing the laminated paper according to any one of the above. The nonwoven fabric has a basis weight of 20 g/m2 and a thickness of
Each crepe paper has a basis weight of 35 g/m2 and a thickness of
A product obtained by processing the laminated paper according to any one of claims 1 to 7, characterized in that the total thickness is 90 g/m2 in terms of basis weight. The nonwoven fabric has a basis weight of 20 g/m2 and a thickness of
A product obtained by processing the laminated paper according to any one of claims 1 to 7, wherein each crepe paper has a thickness within a range of 20 to 35 m2 in basis weight. 10. The processed laminated paper according to any one of claims 1 to 9, wherein the product obtained by processing the laminated paper comprises any one of wet towels, hand wipes, body wipes, and paper towels. A product that does. A product obtained by processing the laminated paper according to any one of claims 1 to 9, wherein the product obtained by processing the laminated paper comprises sanitary goods. 10. The laminated paper according to any one of claims 1 to 9, wherein the product obtained by processing the laminated paper is a product that is provided to a user after being moistened with water. A product made by processing The laminated paper manufacturing apparatus according to claim 3 or 5,
The laminated paper is
Crepe paper as a pair of outer layer sheets,
A nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the pair of crepe papers,
The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure,
The crepe ratio of the crepe paper is set within the range of 20% to 30%, and the heat-sealed section interval in the width direction of the heat-sealed section row is set within the range of 10 mm to 25 mm,
Within the range of the distance between the heat-sealed parts in the width direction, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper,
The laminated paper manufacturing apparatus includes:
A pair of first and second heat seal rollers for forming the row of heat-sealed portions,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion facing the thermocompression-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding convex portion is exposed to the first heat-sealing roller. A manufacturing apparatus for laminated paper, characterized in that the thermocompression bonding surface is opposed to the thermocompression bonding surface of a seal roller. An apparatus for manufacturing laminated paper,
The laminated paper is
Crepe paper as a pair of outer layer sheets,
A nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the pair of crepe papers,
The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure,
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 10 mm to 15 mm,
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm,
Within the range of the distance between the heat-sealed parts in the width direction, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper,
The laminated paper manufacturing apparatus includes:
A pair of first and second heat seal rollers for forming the row of heat-sealed portions,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion facing the thermocompression-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding convex portion is exposed to the first heat-sealing roller. A manufacturing apparatus for laminated paper, characterized in that the thermocompression bonding surface is opposed to the thermocompression bonding surface of a seal roller. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger by a certain dimension than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller, and When the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat-sealing roller and the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat-sealing roller are arranged facing each other in a substantially close contact state, the first heat-sealing roller On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat seal roller, the constant width portions at both widthwise end portions of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller are exposed. 15. The laminated paper manufacturing apparatus according to claim 13 or 14, characterized in that: On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding protrusion of the second heat seal roller, a pair of side surfaces extend at a predetermined obtuse angle with respect to the thermocompression bonding surface. 16. The apparatus for manufacturing laminated paper according to claim 15. In the row of heat-sealed portions of the laminated paper, first heat-sealed portions having a constant length and a constant width are arranged in a broken line at regular intervals in the length direction. A second heat-sealed portion having the same constant length and width as the heat-sealed portion is arranged at an intermediate position between the first heat-sealed portions and the second heat-sealed portion. is shifted to a position that coincides with the intermediate position of the interval between the first heat-sealed parts,
In the first heat seal roller, the thermocompression-bonding convex portion is a convex thermocompression-bonding convex portion corresponding to the heat-bonding portion, and the peripheral surface of the thermocompression-bonding convex portion is the heat-bonding portion. 15. The apparatus for producing laminated paper according to claim 13 or 14, wherein the corresponding thermocompression bonding surfaces are provided. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger by a certain dimension than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller, and When the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat-sealing roller and the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat-sealing roller are arranged facing each other in a substantially close contact state, the first heat-sealing roller On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat seal roller, the constant width portions at both widthwise end portions of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller are exposed. 18. The apparatus for manufacturing laminated paper according to claim 17, characterized in that: On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding protrusion of the second heat seal roller, a pair of side surfaces extend at a predetermined obtuse angle with respect to the thermocompression bonding surface. 19. The apparatus for producing laminated paper according to claim 18. The thermocompression-bonding surface of the thermocompression-bonding convex portion includes a linear thin strip portion extending linearly in a plan view corresponding to the heat-sealing portion, and semicircular curved portions at both ends of the linear thin strip portion in the longitudinal direction. 20. The laminated paper manufacturing apparatus according to claim 18 or 19, characterized in that it is composed of a part. A heat seal roller of a laminated paper manufacturing apparatus,
The laminated paper is
Crepe paper as a pair of outer layer sheets,
A nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the pair of crepe papers,
The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure,
The crepe ratio of the crepe paper is set within the range of 20% to 30%, and the heat-sealed section interval in the width direction of the heat-sealed section row is set within the range of 10 mm to 25 mm,
Within the range of the distance between the heat-sealed parts in the width direction, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper,
The heat seal roller of the laminated paper manufacturing apparatus is
A pair of first and second heat seal rollers for forming the row of heat-sealed portions,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. 1. A heat seal roller of a laminated paper manufacturing apparatus, wherein the heat seal roller has a thermocompression surface facing the thermocompression surface of the seal roller. A heat seal roller of a laminated paper manufacturing apparatus,
The laminated paper is
Crepe paper as a pair of outer layer sheets,
A nonwoven fabric as a heat-fusible intermediate layer sheet disposed in a laminated state between the pair of crepe papers,
The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure,
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 10 mm to 15 mm,
When the crepe rate of the crepe paper is in the range of 26% to 30%, the heat-sealed portion interval in the width direction of the heat-sealed portion row is set within the range of 15 to 25 mm,
Within the range of the distance between the heat-sealed parts in the width direction, the distance between the heat-sealed parts in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper,
The heat seal roller of the laminated paper manufacturing apparatus is
A pair of first and second heat seal rollers for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. 1. A heat seal roller of a laminated paper manufacturing apparatus, wherein the heat seal roller has a thermocompression surface facing the thermocompression surface of the seal roller. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger by a certain dimension than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller, and When the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat-sealing roller and the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat-sealing roller are arranged facing each other in a substantially close contact state, the first heat-sealing roller On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat seal roller, the constant width portions at both widthwise end portions of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller are exposed. 23. The heat seal roller of the laminated paper manufacturing apparatus according to claim 21 or 22, characterized in that On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding protrusion of the second heat seal roller, a pair of side surfaces extend at a predetermined obtuse angle with respect to the thermocompression bonding surface. 24. The heat sealing roller of the laminated paper manufacturing apparatus according to claim 23. In the row of heat-sealed portions of the laminated paper, the first heat-sealed portions in the shape of a straight line segment having a constant length and a constant width are arranged in a broken line at regular intervals in the length direction, and the first heat-sealed portion A second heat-sealed portion having the same constant length and width as the heat-sealed portion is placed at an intermediate position between each of the second heat-sealed portions relative to the first heat-sealed portion. is shifted to a position that coincides with the intermediate position of the interval between the first heat-sealed parts,
In the first heat seal roller, the thermocompression-bonding convex portion is a convex thermocompression-bonding convex portion corresponding to the heat-bonding portion, and the peripheral surface of the thermocompression-bonding convex portion is the heat-bonding portion. 23. The heat seal roller of the laminated paper manufacturing apparatus according to claim 21 or 22, wherein the heat seal roller has a corresponding thermocompression surface. The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger by a certain dimension than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller, and When the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat-sealing roller and the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat-sealing roller are arranged facing each other in a substantially close contact state, the first heat-sealing roller On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat seal roller, the constant width portions at both widthwise end portions of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller are exposed. 26. The heat seal roller of the laminated paper manufacturing apparatus according to claim 25, characterized in that On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding protrusion of the second heat seal roller, a pair of side surfaces extend at a predetermined obtuse angle with respect to the thermocompression bonding surface. 27. The heat sealing roller of the laminated paper manufacturing apparatus according to claim 26. The thermocompression-bonding surface of the thermocompression-bonding convex portion includes a linear thin strip portion extending linearly in a plan view corresponding to the heat-sealing portion, and semicircular curved portions at both ends of the linear thin strip portion in the longitudinal direction. 28. The heat seal roller of the laminated paper manufacturing apparatus according to claim 26 or 27, wherein the heat seal roller is composed of a part. A laminated paper manufacturing method using the laminated paper manufacturing apparatus according to claim 13 or 14,
The roller lengths of the first and second heat seal rollers are set within a range of 1200 mm to 1500 mm,
The roller diameter D of the heat seal roller is set within a range of 180 mm to 300 mm,
Manufacture of laminated paper, characterized in that a pressing force during thermocompression bonding, which is a pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, is set to a value of 2 atmospheres or more. Method. The pressing force during thermocompression bonding is set within a range of 5.5 to 7.0 atmospheres when the roller length L of the heat seal roller is 1400 mm, and 7 when the roller length L of the heat seal roller is 1500 mm. 30. The method for producing laminated paper according to claim 29, wherein the pressure is set within the range of 0.5 to 8.0 atm. The thermocompression bonding temperature, which is the temperature during thermocompression bonding of the heat seal roller, is set within a range of 175 to 200° C.,
30. The method of manufacturing laminated paper according to claim 29, wherein temperature control and rotation control of the heat seal roller are performed so that the thermocompression bonding temperature increases or decreases in proportion to the rotation speed of the heat seal roller. According to the thickness of the base paper, the heat-sealing roller is maintained at a constant heat-sealing temperature, and the rotation speed of the heat-sealing roller increases or decreases in proportion to the thickness of the base paper, which is the thickness of the laminated paper before heat-sealing. 30. The method for producing laminated paper according to claim 29, wherein the rotation is controlled by increasing or decreasing the rotation speed of the heat seal roller. The nonwoven fabric thickness is adjusted so that the thermal compression bonding temperature of the heat sealing roller is maintained constant and the rotation speed of the heat sealing roller increases or decreases in proportion to the nonwoven fabric thickness, which is the thickness of the nonwoven fabric raw material sheet of the laminated paper before thermal bonding. 30. The method of manufacturing laminated paper according to claim 29, wherein the rotational speed of the heat seal roller is increased or decreased in response to the rotation of the heat seal roller. The rotation speed of the heat-sealing roller is kept constant, and the nonwoven fabric thickness is adjusted so that the heat-sealing roller heat-sealing temperature increases or decreases in proportion to the nonwoven fabric thickness, which is the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat-sealing. 30. The method of manufacturing laminated paper according to claim 29, wherein the temperature is controlled by increasing or decreasing the thermocompression bonding temperature of the heat seal roller according to the condition. A closed space is formed inside each of the heat-sealing rollers, and the internal space of the heat-sealing roller is a closed space maintained in a vacuum state,
External water supply means are connected to the internal spaces of the heat seal rollers, respectively, and water is supplied from the water supply means to the internal spaces of the heat seal rollers, and when the heat seal rollers are heated, The high-temperature steam obtained by heating the moisture is attached to the inner surface of the heat seal roller in a thin layer or film, and the layer or film vapor spreads the entire heat seal roller in the circumferential direction. is maintained at a uniform temperature over the entire length and the entire length direction, and the thermocompression bonding temperature is controlled to be maintained evenly and evenly over the entire surface of the thermocompression bonding surface of all the thermocompression bonding protrusions. The method for producing laminated paper according to claim 29. A heat seal roller of a laminated paper manufacturing apparatus,
A pair of a first heat seal roller and a second heat seal roller for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. The thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
The width of the thermocompression bonding surface of the thermocompression convex portion of the second heat seal roller is set to be larger by a certain dimension than the width of the thermocompression bonding surface of the thermocompression convex portion of the first heat seal roller, and When the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat-sealing roller and the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat-sealing roller are arranged facing each other in a substantially close contact state, the first heat-sealing roller On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat seal roller, the constant width portions at both widthwise end portions of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller are exposed. Along with becoming
On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding protrusion of the second heat seal roller, a pair of side surfaces extend at a predetermined obtuse angle with respect to the thermocompression bonding surface. A heat seal roller of a laminated paper manufacturing apparatus characterized by: The thermocompression-bonding surface of the thermocompression-bonding convex portion includes a linear thin strip portion extending linearly in a plan view and semicircular portions at both ends in the length direction of the linear thin strip portion corresponding to the heat-sealing portion row. 2. The heat seal roller of the laminated paper manufacturing apparatus according to claim 1, wherein the heat seal roller comprises a curved portion. A laminated paper manufacturing apparatus in which the heat seal roller according to claim 36 or 37 can be mounted,
The roller lengths of the first heat seal roller and the second heat seal roller are set within a range of 1200 mm to 1500 mm,
The roller diameters of the first heat seal roller and the second heat seal roller are set within a range of 180 mm to 300 mm,
Manufacture of laminated paper characterized in that the pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, can be freely set to a value of 2 atmospheres or more. Device. When the roller length of the first heat-sealing roller and the second heat-sealing roller is 1400 mm, the pressing force at the time of thermocompression bonding is freely set within the range of 5.5 to 7.0 atmospheres. 39. The apparatus for manufacturing laminated paper according to claim 38, wherein when the roller length of the heat seal roller and the second heat seal roller is 1500 mm, the pressure can be freely set within the range of 7.5 to 8.0 atmospheres. The thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, can be freely set within a range of 175 to 200 ° C.,
Temperature control and rotation control of the first heat-seal roller and the second heat-seal roller so that the thermocompression bonding temperature increases or decreases in proportion to the rotation speed of the first heat-seal roller and the second heat-seal roller 39. The apparatus for manufacturing laminated paper according to claim 38, wherein it is possible to freely perform The thermocompression bonding temperature, which is the temperature of the thermocompression bonding of the first heat seal roller and the second heat seal roller, is maintained constant, and the rotation speed of the first heat seal roller and the second heat seal roller is increased. Rotation control by increasing/decreasing the rotation speed of the first heat-sealing roller and the second heat-sealing roller according to the thickness of the base paper so as to increase or decrease in proportion to the thickness of the base paper, which is the thickness of the laminated paper before heat-sealing. 39. The apparatus for manufacturing laminated paper according to claim 38, wherein it is freely possible to The thermocompression bonding temperature, which is the temperature of the thermocompression bonding of the first heat seal roller and the second heat seal roller, is maintained constant, and the rotation speed of the first heat seal roller and the second heat seal roller is increased. The rotation speed of the first heat-sealing roller and the second heat-sealing roller is increased or decreased according to the thickness of the nonwoven fabric so that it increases or decreases in proportion to the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat-sealing. 39. The laminated paper manufacturing apparatus according to claim 38, wherein the rotation control is freely controlled by The rotational speeds of the first heat-sealing roller and the second heat-sealing roller are maintained constant, and the thermocompression bonding temperature, which is the temperature at the time of thermocompression bonding of the first heat-sealing roller and the second heat-sealing roller, is The thermocompression bonding temperature of the first heat-sealing roller and the second heat-sealing roller is increased or decreased according to the thickness of the nonwoven fabric so that it increases or decreases in proportion to the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat-sealing. 39. The apparatus for producing laminated paper according to claim 38, wherein the temperature can be freely changed. A sealed space is formed inside each of the first heat-seal roller and the second heat-seal roller, and the inner space of the first heat-seal roller and the second heat-seal roller is in a vacuum state. It is a closed space maintained at
External water supply means are connected to the internal spaces of the first heat-seal roller and the second heat-seal roller, respectively, and the water supply means supplies the first heat-seal roller and the second heat-seal roller. Moisture is supplied to the inner space, respectively, and when the first heat-seal roller and the second heat-seal roller are heated, high-temperature steam obtained by heating the moisture is supplied to the first heat-seal roller and the second heat-seal roller. 2 to form a thin layer or film on the inner surface of the heat seal roller 2, and the layer or film vapor causes the entire first heat seal roller and the second heat seal roller to be covered with the first heat seal roller. The heat seal roller and the second heat seal roller are maintained at a uniform temperature over the entire circumferential direction and the entire length direction, and the first heat is applied over the entire surface of the thermocompression bonding surface of all the thermocompression bonding protrusions. 39. The laminated paper according to claim 38, characterized in that the thermocompression bonding temperature, which is the temperature during thermocompression bonding of the sealing roller and the second heat sealing roller, can be freely controlled so as to be maintained uniformly. manufacturing device. Crepe paper as a pair of outer layer sheets and nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend A laminated paper manufacturing apparatus in which the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by linear heat-sealed portion rows extending in an orthogonal direction,
A pair of a first heat seal roller and a second heat seal roller for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. The thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
Furthermore,
The roller lengths of the first heat seal roller and the second heat seal roller are set within a range of 1200 mm to 1500 mm,
The roller diameters of the first heat seal roller and the second heat seal roller are set within a range of 180 mm to 300 mm,
Manufacture of laminated paper characterized in that the pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, can be freely set to a value of 2 atmospheres or more. Device. Crepe paper as a pair of outer layer sheets and nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend A laminated paper manufacturing apparatus in which the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by linear heat-sealed portion rows extending in an orthogonal direction,
A pair of a first heat seal roller and a second heat seal roller for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. The thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
Furthermore,
The pressing force at the time of thermocompression bonding, which is the pressing force applied from the thermocompression convex portion to the heat-sealed portion of the laminated paper before heat-sealing, was obtained when the roller length of the first heat-sealing roller and the second heat-sealing roller was 1400 mm. In the case of , it can be freely set within the range of 5.5 to 7.0 atmospheres, and when the roller length of the first heat seal roller and the second heat seal roller is 1500 mm, 7.5 to 8.0 atmospheres An apparatus for manufacturing laminated paper, characterized in that it can be set freely within a range. Crepe paper as a pair of outer layer sheets and nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend A laminated paper manufacturing apparatus in which the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by linear heat-sealed portion rows extending in an orthogonal direction,
A pair of a first heat seal roller and a second heat seal roller for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. The thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
Furthermore,
The thermocompression bonding temperature, which is the temperature during thermocompression bonding of the first heat seal roller and the second heat seal roller, is freely set within a range of 175 to 200 ° C.,
Temperature control and rotation control of the first heat-seal roller and the second heat-seal roller so that the thermocompression bonding temperature increases or decreases in proportion to the rotation speed of the first heat-seal roller and the second heat-seal roller A laminated paper manufacturing apparatus characterized in that it is free to perform Crepe paper as a pair of outer layer sheets and nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend A laminated paper manufacturing apparatus in which the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by linear heat-sealed portion rows extending in an orthogonal direction,
A pair of a first heat seal roller and a second heat seal roller for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. The thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
Furthermore,
The thermocompression bonding temperature, which is the temperature of the thermocompression bonding of the first heat seal roller and the second heat seal roller, is maintained constant, and the rotation speed of the first heat seal roller and the second heat seal roller is increased. Rotation control by increasing/decreasing the rotation speed of the first heat-sealing roller and the second heat-sealing roller according to the thickness of the base paper so as to increase or decrease in proportion to the thickness of the base paper, which is the thickness of the laminated paper before heat-sealing. A manufacturing apparatus for laminated paper, characterized in that it is free to do so. Crepe paper as a pair of outer layer sheets and nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend A laminated paper manufacturing apparatus in which the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by linear heat-sealed portion rows extending in an orthogonal direction,
A pair of a first heat seal roller and a second heat seal roller for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. The thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
Furthermore,
The thermocompression bonding temperature, which is the temperature of the thermocompression bonding of the first heat seal roller and the second heat seal roller, is maintained constant, and the rotation speed of the first heat seal roller and the second heat seal roller is increased. The rotation speed of the first heat-sealing roller and the second heat-sealing roller is increased or decreased according to the thickness of the nonwoven fabric so that it increases or decreases in proportion to the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat-sealing. A manufacturing apparatus for laminated paper, characterized in that the rotation can be freely controlled by Crepe paper as a pair of outer layer sheets and nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend A laminated paper manufacturing apparatus in which the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by linear heat-sealed portion rows extending in an orthogonal direction,
A pair of a first heat seal roller and a second heat seal roller for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. The thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
Furthermore,
The rotational speeds of the first heat-sealing roller and the second heat-sealing roller are maintained constant, and the thermocompression bonding temperature, which is the temperature at the time of thermocompression bonding of the first heat-sealing roller and the second heat-sealing roller, is The thermocompression bonding temperature of the first heat-sealing roller and the second heat-sealing roller is increased or decreased according to the thickness of the nonwoven fabric so that it increases or decreases in proportion to the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat-sealing. An apparatus for producing laminated paper, characterized in that the temperature can be controlled by changing. Crepe paper as a pair of outer layer sheets and nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend A laminated paper manufacturing apparatus in which the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure by linear heat-sealed portion rows extending in an orthogonal direction,
A pair of a first heat seal roller and a second heat seal roller for forming the heat-sealed portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-bonding portion row, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding protrusion facing the thermocompression-bonding protrusion of the first heat-sealing roller, and the circumferential surface of the thermocompression-bonding protrusion is subjected to the first heat-sealing roller. The thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
Furthermore,
A sealed space is formed inside each of the first heat-seal roller and the second heat-seal roller, and the inner space of the first heat-seal roller and the second heat-seal roller is in a vacuum state. It is a closed space maintained at
External water supply means are connected to the internal spaces of the first heat-seal roller and the second heat-seal roller, respectively, and the water supply means supplies the first heat-seal roller and the second heat-seal roller. Moisture is supplied to the inner space, respectively, and when the first heat-seal roller and the second heat-seal roller are heated, high-temperature steam obtained by heating the moisture is supplied to the first heat-seal roller and the second heat-seal roller. 2 to form a thin layer or film on the inner surface of the heat seal roller 2, and the layer or film vapor causes the entire first heat seal roller and the second heat seal roller to be covered with the first heat seal roller. The heat seal roller and the second heat seal roller are maintained at a uniform temperature over the entire circumferential direction and the entire length direction, and the first and second heat seal rollers are maintained over the entire surface of the thermocompression bonding surface of all the thermocompression bonding protrusions. 2. A manufacturing apparatus for laminated paper, characterized in that the heat seal roller 2 is capable of being controlled so that the heat-sealing temperature, which is the temperature at the time of heat-sealing, is kept uniform and uniform.

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