JP2017169679A - Laminated paper, and method and apparatus for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated paper that includes a value-added high function, and is drastically improved in performance more than before.SOLUTION: A laminated paper comprises crepe paper as a pair of outer sheets and a heat-fusible interlayer sheet disposed between the crepe paper in a multilayer state. The crepe paper is bonded to the interlayer sheet by heat fusion to create a layered structure, based on a linear heat fusion part row extending in the direction perpendicular to the extending direction of the crepe creasing of the crepe paper. Also, the laminated paper is provided with a printing unit in an inner face of the interlayer sheet or the crepe paper, and the thickness of the crepe paper is set in such a thickness as the printing unit is visible from the outside through the crepe paper when the crepe paper is made a wet state.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminated paper that can be used for paper towels, hand towels, body wipes, paper towels, etc., a method for producing the laminated paper, and an apparatus for producing the laminated paper, in particular, a crepe paper and a heat-fusible sheet. The present invention relates to a laminated paper that is laminated and heat-sealed, a method for producing the laminated paper, and an apparatus for producing the laminated paper.

  As inventions relating to conventional laminated paper that can be used for paper towels, etc., there are an invention according to Patent Document 1 and an invention according to Patent Document 2 relating to the inventors' inventions or ideas. In these inventions, a heat-setting part or a heat is formed so that a moisture-absorbing paper having a crepe and a heat-fusible sheet (a moisture-absorbing paper mixed with synthetic fiber or a nonwoven fabric) are laminated and extend in a direction substantially orthogonal to the crepe of the moisture-absorbing paper. A seal portion is formed and integrated by heat-sealing them. These inventions can provide a laminated paper that has a good touch and is excellent in appearance and usability, can be heat-sealed at a low temperature, can be easily processed, and can be manufactured at low cost. Can be reduced.

  Moreover, there exist invention of patent document 3 and invention of patent document 4 as invention of this inventor which further improved the conventional laminated paper which has the above outstanding effects. In particular, these inventions provide a laminated paper that greatly improves the fusion strength of the heat-sealed portion of the crepe paper and the heat-fusible sheet, and further improves the appearance by increasing the overall volume feeling. be able to. That is, the laminated papers according to these inventions can obtain a sufficient fusion strength even if the fusion area is reduced, and the overall volume feeling can be increased.

Japanese Patent Publication No. 4-24480 No. 4-15116 Japanese Patent Laid-Open No. 11-342090 JP 2003-39581 A

  The inventions of the above-mentioned Patent Documents 1 to 4 can greatly improve the touch, appearance and feeling of use when the laminated paper is embodied in paper towels, etc. This product has the main functional effect of greatly improving the fusion strength between the moisture-absorbing paper and the heat-fusible sheet, and greatly increasing the overall volume. As a big advantage. On the other hand, the present inventor gives a function with higher added value to the conventional laminated paper in the process of processing the laminated paper as a raw material into a final product such as a paper towel or after the processing. In addition, the inventors sought a new laminated paper and a method for producing the same that can dramatically improve the performance as a laminated paper. The present inventor has thus provided a value-added function, and a laminated paper whose performance has been greatly improved as compared with the prior art, a production method for producing the laminated paper, and the laminated paper. As a result of continuing research and development on a manufacturing apparatus for manufacturing or a manufacturing apparatus used in the manufacturing method and repeating trial and error, it corresponds to the present invention.

  That is, it is an object of the present invention to provide a laminated paper, a laminated paper manufacturing method, and a laminated paper manufacturing apparatus that have a high value-added function and whose performance has been greatly improved as compared with the conventional one.

  The laminated paper of the present invention comprises a crepe paper as a pair of outer layer sheets and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe paper, and the crepe paper of the crepe paper extends. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing part array extending in a direction orthogonal to the direction to form a laminated structure. In the laminated paper of the present invention, a printing unit is provided on an inner surface of the intermediate layer sheet or the crepe paper, and when the thickness of the crepe paper is set to a wet state, the printing unit is configured to be the crepe. The thickness is set so as to be visible from the outside through paper.

  The method for producing a laminated paper of the present invention is the method for producing a laminated paper according to claim 1, wherein the intermediate layer sheet is made of a nonwoven fabric, and the printing section is printed on the nonwoven fabric raw material sheet that is the raw material sheet of the nonwoven fabric. In order to compensate for the shrinkage, a nonwoven material sheet having a width that is larger by a predetermined ratio than the width of the laminated paper to be actually obtained 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 claim 1, wherein the first and second heats form a pair for forming the heat-sealing portion array. The first heat seal roller has a convex thermocompression-bonding convex portion corresponding to the heat-sealing portion, and a peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface. The second heat seal roller has a ridge-like thermocompression-bonding convex portion opposed to the thermocompression-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding convex portion is the first heat-sealing roller. The width of the thermocompression bonding surface of the thermocompression-bonding convex portion of the first heat-sealing roller is the width of the thermocompression-bonding surface of the thermocompression-bonding convex portion of the first heat-sealing roller. The width is set larger than a certain dimension.

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

FIG. 1 is a plan view showing a first specific example (laminate paper having a pattern portion) of the laminated paper (laminate paper having a printing portion) according to Embodiment 1 of the present invention. 2 is an enlarged plan view showing the laminated paper according to the first embodiment of the present invention taken along the line AA in FIG. 1, and (a) is a drying of the laminated paper according to the first embodiment. A state is shown, (b) shows the swelling state at the time of moisture content of the laminated paper which concerns on Embodiment 1. FIG. FIG. 3 is a plan view showing a second specific example (laminate paper having an advertisement part) of the laminated paper according to Embodiment 1 of the present invention. FIG. 4 is a side view showing the laminated paper according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view showing the laminated paper according to Embodiment 1 of the present invention cut in the horizontal direction, and shows an enlarged portion where a printing layer is provided in a circle of a one-dot chain line. FIG. 6 is a cross-sectional view of the laminated paper (laminated paper having a printing unit) according to Embodiment 2 of the present invention cut in the horizontal direction, and shows a circular portion (a portion provided with a printing layer) indicated by a one-dot chain line. Enlarged view. 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 a laminated paper (a 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 the heat seal roller of the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, and enlarges the circular portion indicated by the alternate long and short dash line for explanation of the linear thermocompression-bonding convex portion. Show. FIG. 11 is an explanatory diagram for explaining a process for forming a linear heat-sealing portion in a laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, and is an explanatory diagram showing a heat seal roller portion in a side view. . FIG. 12 is an explanatory diagram for explaining the process of forming the linear heat-sealing 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. It is explanatory drawing which shows the internal structure in a cross section. FIG. 13 is an explanatory view showing the configuration of the linear thermocompression-bonding convex portion of the heat seal roller of the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, and the upper diagram shows a part of the pair of heat seal rollers. The center figure is a circular part indicated by a one-dot chain line in the upper figure for explaining a state in which the linear thermocompression-bonding convex parts of the pair of heat seal rollers are engaged with each other and press the raw material sheet of the laminated paper FIG. 5 is a cross-sectional view showing the cross section of the enlarged heat transfer roller, and the lower figure is a circular portion indicated by a one-dot chain line in the center of the center figure for explaining the shape of the linear thermocompression-bonding protrusions of the pair of heat seal rollers. It is sectional drawing which expands and shows. FIG. 14 shows an example of changing the width between the linear heat-sealed portions according to the crepe rate in the laminated paper according to Embodiment 1 of the present invention, and (a) corresponds to the first crepe rate. FIG. 6 is an enlarged plan view of a part of the laminated paper showing a case where the interval (width) between adjacent linear heat-sealed portions is the first width, and (b) corresponds to the second crepe rate. FIG. 6 is an enlarged plan view of a part of the laminated paper showing a case where the interval (width) between adjacent linear heat-sealed portions is the second width. FIG. 15 is a graph for explaining a preferred specific example of a laminated paper manufacturing method using the laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, and (a) is a laminated paper produced by the laminated paper manufacturing apparatus. Explanatory drawing which shows the relationship between the feeding speed of the raw material sheet of paper, and the thermocompression bonding temperature of the heat seal roller of the laminated paper manufacturing apparatus, (b) The thermocompression bonding temperature and the lamination of the heat sealing roller of the laminated paper manufacturing apparatus Explanatory drawing which shows the relationship between the thickness (base paper thickness) of the raw paper of a raw material sheet of paper, (c) is the feed speed of the raw material sheet of laminated paper by the manufacturing apparatus of laminated paper, and the raw paper thickness of the raw material sheet of laminated paper Explanatory drawing which shows the relationship between these, (d) is explanatory drawing which shows the relationship between the thermocompression bonding temperature of the heat seal roller of the manufacturing apparatus of laminated paper, and the thickness (nonwoven fabric thickness) of the nonwoven fabric of the raw material sheet of laminated paper It 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, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described. Throughout each embodiment, the same members, elements, or parts are denoted by the same reference numerals, and the description thereof is omitted.

Embodiment 1 (Laminated paper in which printing section is provided on non-woven fabric)
[Overall configuration of laminated paper]
As shown in FIGS. 1 to 5, the laminated paper of Embodiment 1 is embodied as a laminated paper 10 having a printing unit. First, the overall configuration of the laminated paper 10 will be described. As shown in FIG. 1, the laminated paper 10 has a predetermined outer contour (typically a rectangular shape or the like) in a plan view (or a bottom view) of the laminated paper 10. A 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. 4, the laminated paper 10 includes the crepe paper 1 as the outer layer sheet constituting the pair of outer layers and the pair of outer layers. It has the laminated structure which consists of the nonwoven fabric 2 as an intermediate | middle layer sheet which comprises the intermediate | middle layer arrange | positioned by. In addition, the laminated paper 10 maintains the laminated structure by thermally fusing one and the other of the pair of crepe papers 1 to the one surface and the other surface of the nonwoven fabric 2 at the same place, respectively. . That is, the laminated paper 10 includes the first heat fusion portion 11a and the second heat fusion portion row 11 (the first heat fusion portion row 11A and the second heat fusion portion row 11B). A pair of crepe paper 1 is heat-sealed to the nonwoven fabric 2 at the same location by heat-sealing the pair of crepe paper 1 to the nonwoven fabric 2 at each location of the heat-sealing portion 11b.

[Heat fusion part]
The heat-sealing part 11 will be described in detail. The laminated paper 10 has a heat-fusing part array 11 having a broken line shape in the length direction of the laminated paper 10 (the supply direction of the base paper at the time of manufacture, It is formed so as to extend in the whole (vertical direction) and constitutes one row of heat-sealing portions 11 rows. Further, the laminated paper 10 is a width direction of the laminated paper 10 (a direction perpendicular to the raw paper supply direction at the time of manufacture) so that the multiple rows of the heat-sealing portions 11 are parallel to each other at a predetermined interval, They are arranged side by side continuously over the whole (left and right direction in FIG. 1). Thereby, the laminated paper 10 has the non-fusion | fusion part 12 which makes a linear strip | belt shape between the adjacent heat-fusion part row | line | columns 11, respectively. That is, in the laminated paper 10, a large number of rows of non-fused portions 12 are continuously arranged in parallel across the entire width direction so as to be parallel to each other at regular intervals. In the laminated paper 10, the multiple rows of heat-sealing portion rows 11 are arranged in a first row in which the first heat-sealing portions 11 a are arranged in a straight line at regular intervals in the length direction of the laminated paper 10. A second heat-sealed portion row 11A, and a second heat-fused portion row 11B in which the second heat-fused portion 11b is arranged in a straight line at a predetermined interval in the length direction of the laminated paper 10. It is composed of That is, the first row of heat-sealing portion rows 11A composed of the first heat-sealing portions 11a and the second row of heat-sealing portion rows 11B composed of the second heat-fusion portions 11b are laminated. The paper 10 is alternately arranged in parallel in the width direction at regular intervals. Further, as shown in FIG. 2, the first heat-sealing portion 11a constitutes a linear line-segment-like fusion portion having a predetermined length and a predetermined width in the laminated paper 10, and such a fixed portion. By arranging the first heat-sealing portions 11a having a certain length and a straight line in the length direction at regular intervals, a first heat-sealing portion row 11A having a broken line shape is formed. The second heat fusion part 11b forms a straight line segment fusion part having the same length and the same width as the first heat fusion part 11a, and has a constant length and a constant width. By arranging the second heat fusion portions 11b linearly at regular intervals in the length direction, the second row of heat fusion is formed in the same broken line shape as the heat fusion portion row 11A of the first row. The partial row 11B is configured. The first heat fusion portion 11a of the first heat fusion portion row 11A and the second heat fusion portion 11b of the second heat fusion portion row 11B are adjacent to each other (that is, adjacent to each other). And the center position in the length direction of the first heat fusion portion 11a of the first heat fusion portion row 11A is the heat fusion portion of the second row. The positions in the length direction of the laminated paper 10 are shifted from each other so as to be in the middle position of the gap between the adjacent second heat-sealing portions 11b of the receiving portion row 11B.

[Non-fusion part]
As shown in FIG. 4, the laminated paper 10 forms a single non-fused portion 12 in the form of a straight band between two adjacent heat-fused portion rows 11. Is expanded after moisture is contained in the laminated paper 10 to form an expanded portion. Specifically, as shown in FIGS. 1 and 2, the non-fused portion 12 includes a wide inflating portion 12 a (which forms a wide inflating portion after the moisture content of the laminated paper 10), and (of the laminated paper 10. And a narrow inflatable portion 12b (which will constitute a narrow inflatable portion after hydration). More specifically, each of the wide expansion portions 12a is in a range (non-overlapping range) in which the adjacent first heat fusion portion row 11A and second heat fusion portion row 11B do not overlap. The laminated paper 10 is provided 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 expansion portion 12a includes the first heat fusion portion 11a in the first heat fusion portion row 11A in the second row from the left and the second row in the third row from the left. In the range of the intermediate portion in the longitudinal direction where the second heat fusion portion 11b of the heat fusion portion row 11B does not overlap with each other, the heat fusion portion row 11A of the first row is adjacent vertically. Heat in the second row from the right edge of the first row of heat-sealing portions 11A within the length range between the ends of the first heat-sealing portion 11a (between one end and the other end). Left side edge of another first row of heat fusion portion rows 11A (in the case of FIG. 2, the first row of heat fusion portion rows 11A from the left) facing each other across the fusion portion row 11B It is provided in a substantially rectangular shape over the range up to. On the other hand, each of the narrow expansion portions 12b has a range (overlap range) in which the adjacent first heat seal portion row 11A and the second heat seal portion row 11A overlap each other. Is provided on the laminated paper 10 as a small, substantially rectangular portion having a length of 1 and a width of the overlapping range. For example, in FIG. 2, the narrow expansion portion 12 b includes the first heat fusion portion 11 a of the first heat fusion portion row 11 </ b> A in the second row from the left and the second row in the third row from the left. In the range of the end portions in the longitudinal direction where the second heat fusion portions 11b of the heat fusion portion rows 11B of the rows overlap each other, the first heat fusion portions 11A of the first heat fusion portion rows 11A A length range from one end (for example, the upper end) of the portion 11a to the other end (lower end) of the second heat fusion portion 11b of the heat fusion portion row 11B of the second row adjacent thereto, and A substantially rectangular shape is provided over a width range from the right edge of the first row of heat-sealing portion rows 11A to the left side edge of the second row of heat-sealing portion rows 11B.

[Non-fused part (expanded part) collar]
In the laminated paper 10, the crepe paper 1 of the outer layer and the nonwoven fabric 2 of the intermediate layer are not joined at all at the non-fused portion 12, and the non-fused portion 12 of the crepe paper 1 As a portion that is not restrained by the heat-sealing portions 11a and 11b (that is, a portion that is not fixed to the nonwoven fabric 2), the nonwoven fabric 2 moves in the thickness direction and is deformable. In particular, in the portion of the non-fused portion 12 that is close to the heat-fused portion row 11 (that is, the boundary portion with the heat-fused portion row 11), the movable amount of the crepe paper 1 is relatively small. In a portion of the non-fused portion 12 where the distance from the heat-fused portion row 11 is large (that is, the central portion between adjacent heat-fused portion rows 11), the amount of movement of the crepe paper 1 is relatively The amount of the crepe paper 1 that can be moved at the center position between the adjacent heat-sealed portion rows 11 is maximized. In the laminated paper 10, the non-fused portions 12 (that is, the wide expanded portions 12 a and the narrow expanded portions 12 b) of the crepe paper 1 serving as both outer layers are each before the first water content of the laminated paper 10. Shows a large number of crepe cakes, which are the inherently unique gavel of the crepe paper 1. The crepe bottle is a small basket extending in the width direction of the laminated paper 10 (and the width direction of the crepe paper 1), and is formed when the crepe paper 1 is manufactured.

  On the other hand, after the first moisture is applied to the laminated paper 10, the crepe paper 1 passes through the crepe trough in each non-fused portion 12 (the wide expansion portion 12 a and the narrow expansion portion 12 b) of the crepe paper 1. When expanded, that is, when the crepe cake, which is a small cake, expands with moisture, as shown in FIG. 2, the crepe paper 1 is different from the original crepe cake (a larger size than the crepe cake). , Hereinafter referred to as “expanded soot”). In this case, in the crepe paper 1, a plurality of adjacent crepe bottles are expanded and integrated with moisture, and one expansion bottle corresponding to the plurality of crepe bottles is formed. It can be considered that all or part of the original crepe cake disappears. Further, the expansion crease of the crepe paper 1 becomes a large ridge (hereinafter referred to as “expansion large fold”) extending substantially in the entire width direction of the wide expansion portion 12a in the wide expansion portion 12a, and the narrow expansion portion. In 12b, it becomes a cocoon of intermediate size (hereinafter referred to as "inflated cocoon") extending substantially in the entire width direction of the narrow inflatable portion 12b. Becomes a big trap. In addition, in FIG. 14, the example of these expansion | swelling large collars 12aw and expansion middle collars 12bw is shown. Furthermore, in the non-fused portion 12 of the crepe paper 1, not all the crepe bottles are deformed into the expanded large bottle or the expanded middle bottle, and some of the crepe bottles remain as they are (in the original small bottle state). It remains on the paper 1. In addition, the present inventor has conceived that, in the laminated paper 10, in the non-fused portion 12 of the crepe paper 1, there are two types of expansion ridges in the expansion fold of the wide expansion portion 12 a. That is, the inventor of the present invention uses a first type of expansion vat (hereinafter referred to as “the expansion vat”) that remains (that is, mixed) together with the expansion vat without causing a part of the crepe vat to disappear. It is known that there is a large and small mixed soot) and a second type of expanded soot (hereinafter referred to as “completely large soot”) in which the crepe soot has completely disappeared. Similarly, 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 expansion centers in the expansion center of the narrow expansion section 12b. That is, the inventor of the present invention is a first type of expansion lever (hereinafter, “mixed”) that remains (that is, is mixed) with the expansion rod without erasing a part of the crepe rod among the crepe rods. It is known that there is a “small and medium mixed cocoon”) and a second type of expanded cocoon (hereinafter referred to as “complete cocoon”) in which the crepe cake completely disappears. Furthermore, in the laminated paper 10, in the crepe paper 1, the expanded paper, expanded medium, large and small mixed cake, medium and small mixed cake, complete large cake, and complete middle cake are dried after the moisture content. Even afterwards, it basically remains as it is.

  Thereby, in the laminated paper 10 containing water, the expanded large cake, the expanded middle cake, the large and small mixed cake, the small and medium mixed cake, the complete large cake, and the complete middle cake are obtained both when containing water and when drying after containing water. In particular, a combination of the expanded large rod, a large mixed small rod and a complete large rod, and a combination of an expanded middle rod, a small and medium mixed rod and a complete medium rod are included in the wide expanded portion 12a and the narrow expanded portion 12b. Each of them alternately presents a specific effect of increasing the volume feeling in a well-balanced manner across both sides of the laminated paper 10.

[Dimensions of heat-sealed parts and intervals between heat-welded parts]
In the laminated paper 10, the heat-sealed portion rows 11 of the respective rows are arranged in a broken line shape at regular intervals in the length direction with the first heat-sealed portions 11 a having a fixed length and a fixed width. Further, the second heat fusion part 11b, which is a straight line segment having a constant length and a constant width, is shifted in position with respect to the first heat fusion part 11a (that is, each first heat fusion part 11b). The intermediate position of the two heat-sealing portions 11b is arranged so as to coincide with the intermediate position of the interval between the first heat-sealing portions 11a). Has been. In addition, since the length and width of the first heat fusion portion 11a and the second heat fusion portion 11b are set to be the same, the first heat fusion portion 11a and the second heat fusion portion 11b. The part 11b has the same configuration except that the part 11b is displaced in the length direction as described above. On the other hand, in the laminated paper 10, the length and the width of the first heat fusion part 11a and the second heat fusion part 11b are set to a predetermined length and a predetermined width. That is, the length and / or width of each first heat-sealing portion 11a and each second heat-sealing portion 11b is appropriately set according to the outer dimensions of one sheet when the laminated paper 10 is used. (That is, it is set as appropriate according to the vertical dimension and horizontal dimension determined according to the use of the laminated paper 10).

  Specifically, for example, when the laminated paper 10 is used for paper toweling, the length of each heat-sealing portion 11a, 11b is set to an arbitrary value within a range of 35 mm to 45 mm, preferably It is set to an arbitrary value within the range of 38 mm to 42 mm, and more preferably set to a value of about 40 mm. Moreover, the width | variety of each heat-fusion part 11a, 11b is set to the arbitrary values in the range of 1.5 mm-2.5 mm, Preferably, it is set to the value of about 2 mm. And it is preferable to set the ratio (aspect ratio) of the length and width of each heat-sealing part 11a, 11b to the arbitrary ratio within the range of 13: 1 to 23: 1, and set to about 20: 1. More preferably. That is, it is preferable to set the width of each heat fusion part 11a, 11b to about 5% of the length (or to set the length to about 20 times the width). Further, in the heat fusion part 11 of each row of the laminated paper 10, the interval between the heat fusion parts 11A and 11b adjacent in the length direction (hereinafter referred to as “the heat fusion part interval in the length direction”). , 18 mm to 22 mm, and is preferably set to a value of about 20 mm. And it is preferable to set the ratio of the length of each heat-fusion part 11a, 11b and the heat-fusion part space | interval to 2: 1. In other words, the heat fusion portions 11 in each row set the distance between the heat fusion portions in the length direction to about 50% of the length of the heat fusion portions 11a and 11b (or the heat fusion portions 11a and 11b). It is preferable that the length is set to about twice the heat-sealed portion interval). In this way, while maintaining an integral joining force between the crepe paper 1 and the nonwoven fabric 2 by the heat-sealed portion row 11, the expansion rate of the crepe 1 by the non-fused portion 12 is maximized, and the laminated paper 10 The volume feeling can be maintained in the most favorable state.

[End shape of heat-sealed part]
Furthermore, each heat-fusion part 11a, 11b is making the both ends of the length direction into the curved shape of planar semicircle. Thereby, compared with the case where the end part of each heat fusion part is made into a rectangle (namely, when the corner angle of an edge part becomes a right angle), the crepe paper 1 is the edge of each heat fusion part 11a, 11b. It can prevent effectively that it peels with respect to the nonwoven fabric 2 from a part. Further, as will be described later, in this case, both end portions in the length direction of the thermocompression-bonding surface of the thermocompression-bonding convex portion of the heat-sealing roller constituting the heat-sealing portion forming means in the laminated paper manufacturing apparatus are also formed in the corresponding flat half. Because of the circular curved shape, the heat generated by the thermocompression bonding surface of the heat seal roller is compared to the case where the end of each thermocompression bonding surface is rectangular (that is, the corner of the end has a right angle). The raw material sheet of the crepe paper 1 that receives the pressing force from the thermocompression bonding surface during the formation of the fusion bonded portion is not damaged due to excessive pressure concentration at the end of the thermocompression bonding surface, thereby improving the production yield. Or the quality of the laminated paper 10 can be improved. (That is, as will be described later, when the end portion of the thermocompression bonding surface has a right-angled corner, the stress is applied to the raw material sheet of the crepe paper 1 at that corner as compared with the case where the thermocompression bonding surface has a curved shape. Concentration increases the possibility of damage to the raw material sheet at the corners.)

[Creep rate of crepe paper]
In the laminated paper 10, the crepe rate of the crepe paper 1 is set to an arbitrary value within the range of 20% to 40%, and preferably set to an arbitrary value within the range of 20% to 30%. More preferably, the value is set to about 30%. That is, when the crepe rate 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 laminated and bonded to the nonwoven fabric 2 to form the laminated paper 10 and then hydrated in the laminated paper 10. The potential is great. On the other hand, if the crepe rate of the crepe 1 is greater 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, during paper making).

[Creep rate of crepe paper and arrangement interval of heat fusion part]
Further, as shown in FIG. 14, in the laminated paper 10, the arrangement intervals LW <b> 1 and LW <b> 2 (that is, the interval between the center lines in the width direction of adjacent heat fusion portion rows 11, hereinafter, “width” The direction of the heat-bonding portion in the direction ") is set to an arbitrary value within a predetermined range corresponding to the range of the crepe rate of the crepe paper 1. Specifically, when the crepe rate of the crepe paper 1 is a value within a range of 20% to 26%, the width of the heat-sealed portion in the width direction is (relatively small) in the first width direction. It is preferable to set an arbitrary value within the range of 10 mm to 15 mm as the thermal fusion part interval LW1 (that is, the lower limit value is preferably 10 mm and the upper limit value is preferably 15 mm). Within the range of the thermal fusion part interval, it is preferable to increase the thermal fusion part interval in the width direction in proportion to the increase in the crepe rate. Further, when the crepe rate of the crepe paper 1 is a value within a range of 26% to 30%, the width of the heat fusion portion in the width direction is the second heat fusion in the second width direction (which is relatively large). The interval LW2 is preferably set to an arbitrary value within a range of 15 to 25 mm (that is, the lower limit value is preferably 15 mm and the upper limit value is preferably 25 mm). Within the range of the part interval, it is preferable to increase the width of the heat fusion part in the width direction in proportion to the increase in the crepe rate. In the laminated paper 10, when the width of the heat fusion part LW 1, LW 2 in the width direction is smaller than the lower limit value, there is a high possibility that the crepe paper 1 does not sufficiently expand or swell when the laminated paper 10 is hydrated. On the other hand, when the width LW1, LW2 in the width direction of the laminated paper 10 is larger than the upper limit value, the expansion large fistula, the expansion fistula, etc. are more than the expected expansion rate when water is contained in the laminated paper 10. There is a possibility that the quality of the laminated paper 10 may be deteriorated due to excessive expansion or expansion and slackening of the expansion large folds or the expansion folds. For example, when the width LH1 and LW2 in the width direction of the laminated paper 10 is 30 mm or more (that is, a value that greatly exceeds 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 water content is 10, the above-mentioned expansion ridge, expansion ridge, etc., are too expanded or stretched to become loose. That is, even when the crepe rate of the crepe paper 1 is set to 30%, which is the maximum value in the above range, when the width LH1 and LW2 in the width direction of the laminated paper 10 is set to a value of 30 mm or more, At the time of water inclusion, the expanded large tub, the expanded middle tub or the like expands or expands too much and becomes loose.

[Pattern as printing part]
As shown in FIG. 1, the laminated paper 10 can be embodied as a laminated paper 10 having a pattern portion 13 as a first specific example of a printing unit. Specifically, for example, as shown in FIG. 2, the pattern portion 13 can be configured by arranging unit patterns 13 a and 13 b having the same motif over the entire surface or a certain range of the laminated paper 10. In FIG. 2, for example, the unit pattern 13a constitutes a pattern of a predetermined size with a motif of a predetermined type of flower corolla (a collection of petals), while the unit pattern 13b has the same corolla as the unit pattern 13a. The motif constitutes a pattern having a size larger than that of the unit pattern 13a. In addition, the structure of the pattern part 13 is not limited to the thing of FIG. 2, It can be set as the structure which uses arbitrary patterns. That is, the pattern portion 13 can use a unit pattern of a motif different from the unit patterns 13a and 13b in FIG. 2, and can also use unit patterns of various motifs other than those using the unit pattern of the same motif. Arbitrary patterns may be combined. Or the pattern part 13 can also be set as the structure which uses the pattern which consists of repetitive patterns, such as a lattice pattern and a checkered pattern, besides the structure which uses an individual unit pattern like FIG. Alternatively, the pattern portion 13 is a monochromatic pattern (entire monochromatic pattern) formed by printing an arbitrary single color different from the original base color of the laminated paper 10 (particularly, the base color of the crepe paper 1) on the entire surface of the laminated paper 10. Alternatively, a single color pattern (partially single color pattern) formed by printing an arbitrary single color different from the original base color of the laminated paper 10 in a partial range of the laminated paper 10 may be used. Alternatively, the pattern portion 13 may be a pattern (hereinafter referred to as “multi-color pattern”) in which two or more separate colors are randomly printed on the entire surface or a partial range of the laminated paper 10. . In short, as long as the pattern portion 13 can give a separate visual effect to the laminated paper 10 by printing an arbitrary color different from the base color of the normal laminated paper 10 on the laminated paper 10, any configuration is possible. It can be.

[Advertising department as printing department]
Also, as shown in FIG. 3, the laminated paper 10 can be embodied as a laminated paper 10 having an advertising unit 14 as a second specific example of the printing unit. Specifically, for example, the advertising unit 14 may be configured to include an advertising frame 14b and an advertising frame 14c in an inner range of the outer frame 14a. In this case, for example, the advertising unit 14 prints a title, a copy, or the like of a specific advertisement content on the advertisement frame 14b, and prints details of the advertisement content (such as a product description or a picture corresponding to the product) on the advertisement frame 14c. Can be configured. In FIG. 3, the outer frame 14a, the advertising frame 14b, and the advertising frame 14c of the advertising unit 14 are drawn with outlines by broken lines, respectively, but this is only an outer frame 14a, an advertising frame 14b, It is a way to explain the range of the advertising space 14c, and (of course, it is possible to draw them), usually the outer frame 14a, the advertising space 14b, and the advertising space on the laminated paper 10. The outline 14c is not drawn. In addition, the outer frame 14a of the advertising unit 14 is provided for convenience in order to show an example of the contents of the advertisement, and all can be embodied as the advertising frames 14a and 14b without providing the outer frame 14a. Further, the number of advertisement frames 14a and 14b can also be one frame or any number of frames of two or more. Further, the configuration of the advertising unit 14 is not limited to that shown in FIG. In other words, the advertising unit 14 is configured so that any advertisement content or content is printed in any expression form or expression format as long as the advertisement content is printed on an advertising print medium such as a regular flyer or a promotional product. be able to. In addition, as contents and contents to be printed on the advertising unit 14, arbitrary things such as a company name, a logo mark, and a brand can be printed. Furthermore, the laminated paper 10 provided with the printing unit is used as novelty goods such as paper towels distributed in large quantities for the purpose of notifying and advertising various information such as retail store sales information and company campaign information. It can also be applied to novelty goods such as paper towels distributed in large quantities for the purpose of announcing and disseminating various events such as the Olympics and expositions.

[Printer structure]
Next, the structure of the printing unit 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 an outer layer sheet and is disposed inside the laminated paper 10. One of the main features is that the printing portion is printed on the surface using a predetermined printing ink. In addition to this, when the laminated paper 10 is dried, the printing unit can be seen 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. The outer layer on the side where at least the printing unit is provided in the crepe paper 1 as the outer layer sheet so that the transparency from the crepe 1 as the outer layer sheet of the printing unit increases and the visibility from the outside increases. Another main feature is that the thickness (basis weight) of the crepe paper 1 as a sheet is set, and if necessary, the material (paper quality) is set together with the thickness. Specifically, in the first embodiment, the laminated paper 10 includes 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. A multi-layer structure (a multi-layer structure of three or more layers), which faces one crepe paper 1 as an outer layer sheet as an inner surface thereof (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 portion 1.

[Printing section provided on non-woven fabric]
For example, as shown in FIG. 5, the printing unit includes a printing layer 2 a provided on one surface (one side surface in the thickness direction) of the nonwoven fabric 2 as the 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 capable of printing a printing portion, and a desired pattern portion 13 or an advertising portion is formed on one surface of the nonwoven fabric 2 using a predetermined printing ink. The printing unit is configured by providing 14 by printing. In FIG. 5, the printing layer 2a is drawn as a thin layer on one surface of the nonwoven fabric 2 for convenience of explanation. However, in actuality, the printing ink constituting the printing layer 2a is printed at the time of printing. In order to infiltrate the inside of the nonwoven fabric 2 from one side of the nonwoven fabric 2 to form a predetermined pattern or the like of the printing part, the printing ink completely penetrates the inside of the nonwoven fabric 2 and is used for printing on one side of the nonwoven fabric 2 In some cases, the ink layer may not be formed. Alternatively, some of the printing ink may penetrate into the nonwoven fabric 2 while the remaining printing ink layer may be formed on one surface of the nonwoven fabric 2. Moreover, after the printing ink has completely penetrated into the nonwoven fabric 2, it may be exposed from the other surface of the nonwoven fabric 2, and a layer of the printing ink may be formed on the other surface of the nonwoven fabric 2. In any case, the printing portion of the laminated paper 10 is drawn at the highest density on one surface of the nonwoven fabric 2 that becomes the printing surface, and is visually recognized as the printing layer 2a. That is, the pattern portion 13 and the advertisement portion 14 of the various laminated papers 10 described above can be applied to any one of the nonwoven fabrics 2 by an arbitrary printing method using an arbitrary printing ink in accordance with the pattern configuration, advertisement content, or the like. It is provided by printing on the surface.

[Composition of printing layer (printing ink and printing method)]
Here, the printing layer 2a of the printing portion of the laminated paper 10 is formed on one surface of the nonwoven fabric 2 by using any printing ink by any printing method. Preferably, the printing portion is printed. As a method, a printing part formed using a flexographic printing technique is used, and a printing part formed using water-based ink or UV (ultraviolet curable) ink as a printing ink. Specifically, flexographic printing is a type of direct transfer letterpress printing, which uses rubber or synthetic resin as the plate material, and uses liquid ink consisting of water-based ink or UV ink as printing ink. However, the printing layer 2a of the printing part of the laminated paper 10 is printed by printing the predetermined pattern part 13 or the advertising part 14 on one surface of the nonwoven fabric 2 after adjusting the concentration of the water-based ink or UV ink. Part. The laminated paper 10 is formed by interposing the nonwoven fabric 2 having the printing portion between the pair of crepe papers 1 and heat-sealing them together by the heat-welding portion row 11 to be integrated. Yes. Even if the laminated paper 10 is a non-woven fabric 2 having a fine irregular surface on the surface to be printed, the printing part is desired as a printing part by a plate having 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 manufactured using the nonwoven fabric 2 having the printing portion, the printing portion is visually recognized from the outside with a good print quality through the crepe paper 1 particularly in the wet state. Moreover, since this printing paper of the printing part of the nonwoven fabric 2 consists of water-based ink or UV ink, this printing paper does not contain an organic solvent. As a result, the laminated paper 10 manufactured using the nonwoven fabric 2 having the printing part is not affected by the volatilization of the organic solvent unlike the printing ink using the organic solvent. When applied to a product, it becomes a user-friendly and environmentally friendly product. In the printing of the laminated paper 10 on the nonwoven fabric 2, for example, a flexographic printing machine capable of printing up to seven colors is used, and the density of the printing ink of each color is adjusted.

[Material of non-woven fabric]
On the other hand, in the laminated paper 10 according to Embodiment 1 shown in FIG. 5, the non-woven fabric 2 as the intermediate layer sheet is made of a material capable of printing the printing portion, and the crepe paper as the outer layer sheet is made of the linear heat. The non-woven fabric is made of a material that can be securely bonded by heat fusion at the fusion part. Thus, one surface side of the laminated paper 10 (typically, when the laminated paper 10 is applied to a paper towel, one surface side of the exposed laminated paper on the outer surface side of the paper towel, that is, the paper towel The pattern portion 13 and the advertisement portion 14 can be provided by printing on one surface of the nonwoven fabric 2 to be disposed on the front surface side, and the crepe paper 1 serving as a pair of outer layers on both surfaces of the nonwoven fabric 2 is good. The laminated paper 10 having a multilayer structure (three-layer structure in the case of FIG. 5) can be formed.

[Thickness of nonwoven fabric]
In the laminated paper 10, as described above, the non-woven fabric 2 as the intermediate layer sheet has both the printability that enables printing of the printing portion and the heat-fusibility that enables heat-fusion of the crepe paper. Although it is necessary to use the provided material, it is preferable to use a non-woven fabric having a thickness within a predetermined range in order to have both the printability and the heat-fusible properties. Specifically, for example, a conventional non-woven papermaking hand towel uses a non-woven fabric made into a sheet with a basis weight of 45 to 70 g / cm 2 as a raw material sheet. On the other hand, in addition to using a pair of crepe paper 1 and nonwoven fabric 2 as a raw material sheet, the laminated paper 10 of the present embodiment has an arbitrary value within a range of 15 to 25 g / m ² as the nonwoven fabric 2. it is preferred to use a nonwoven fabric having a thickness, more preferably with a thickness of any value within a range of basis weight 18-22 g / m ^2, any value within a range of basis weight 18-20 g / m ² It is more preferable to have a thickness of 20 g / m ² . That is, in the laminated paper 10, if the thickness of the nonwoven fabric 2 is larger than the basis weight 25 g / m ² , the laminated paper 10 may lack flexibility. For example, when the laminated paper 10 is applied to a paper towel or the like. There is a possibility of giving a hard hand feeling to the user of the laminated paper 10. Moreover, when the thickness of the nonwoven fabric 2 is larger than the basis weight of 25 g / m ² , the strength becomes higher than necessary, which causes unnecessary cost increase. Further, during the process of manufacturing the laminated paper 10, for example, in the process of heat-sealing the crepe paper 1 to the nonwoven fabric 2 with a pair of heat seal rollers, the nonwoven fabric 2 is passed through the crepe paper 1 from the heat seal roller having a heating source. When heat is transferred to the fabric, the thickness of the nonwoven fabric 2 is increased, and the heat transfer efficiency is reduced, so that the heat fusion between one crepe paper 1 and one surface of the nonwoven fabric 2 can be satisfactorily performed. However, the thermal fusion between the other crepe paper 1 and the other surface of the nonwoven fabric is not sufficiently performed, and the adhesive force of the nonwoven fabric 2 to the other crepe paper 1 may be insufficient. On the other hand, when the thickness of the nonwoven fabric 2 is smaller than the basis weight of 15 g / m ² , the amount of the thermoplastic resin, which is a material for expressing the heat-sealing force contained in the nonwoven fabric 2, is relatively reduced, and both surfaces of the nonwoven fabric 2 are reduced. When the crepe paper 1 is heat-sealed, there is a possibility that sufficient heat-sealing force may not be obtained, and the overall stiffness of the laminated paper 10 is weakened. For example, the laminated paper 10 is applied to paper towels, etc. This may adversely affect the user's feeling of use of the laminated paper 10.

[Non-woven fabric fiber]
Further, as the non-woven fabric 2, when the thickness is set to a value within the above predetermined range in order to have both the above printability and heat-fusibility, the thickness is particularly a value on the lower limit side within the above predetermined range. (For example, when the thickness is a value such as a basis weight of 15 g / m ² and a basis weight of 18 g / m ² ), it is preferable to use a nonwoven fabric composed of core-sheath composite fibers. That is, when the thickness of the nonwoven fabric 2 is relatively small (that is, when it is a value on the lower limit side within the predetermined range), the nonwoven fabric 2 having the relatively small thickness as described above has the entire laminated paper 10. However, when the crepe paper 1 is heat-sealed to the nonwoven fabric 2, the sheath portion of the core-sheath structure composite fiber is predetermined. While softening or melting at the heating temperature, the adhesive force by heat fusion to the crepe paper 1 is expressed, while the core portion of the core-sheath structure composite fiber remains as it is without being softened or melted, and the nonwoven fabric 2 Since the strength and stiffness of the laminated paper 10 are maintained, the strength and stiffness of the entire laminated paper 10 can be finally maintained, and the volume of the laminated paper 10 can be maintained with the thin nonwoven fabric 2.

[Thickness of crepe paper]
In the laminated paper 10, the crepe paper 1 has a thickness of an arbitrary value within a predetermined range for achieving a predetermined transmittance (transmittance). Specifically, one crepe paper 1 that is overlapped and bonded to one surface of the nonwoven fabric 2 (that is, the surface on which the printing unit is provided) is a nonwoven fabric through the crepe paper 1 in a dry state of the laminated paper 10. The transmittance is such that at least a part of the printed portion of 2 is visible (or the transmittance such that at least a portion of the printed portion of the nonwoven fabric 2 is visible in a translucent state), and at least Transmittance in which the entire printed portion of the nonwoven fabric 2 is visually recognized through the crepe paper 1 in a wet state due to moisture contained in the laminated paper 10 (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 as follows. On the other hand, the other crepe paper 1 that is overlapped and joined to the other surface of the nonwoven fabric 2 is usually set to the same thickness as the one crepe paper 1, but can also be set to a different thickness. Even when the other crepe paper 1 has the same thickness as that of the one crepe paper 1, if the thickness of the non-woven fabric 2 is within the above predetermined range, the non-woven fabric is passed through the other crepe paper 1 in the dry state of the laminated paper 10. At least a part of the printing section 2 is still visible (although it is less sharp than the side of the one crepe paper 1), and is also in a wet state due to the water content of the laminated paper 10 via the other crepe paper 1. The entire printed portion of the nonwoven fabric 2 is visually recognized to a certain degree of clearness (although the sharpness is lower than that of the one crepe paper 1). 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 is set so that the nonwoven fabric can be passed through the crepe paper 1 in the dry state of the laminated paper 10 regardless of whether it is visible from the side of the one crepe paper 1 or from the side of the other crepe paper. At least a part of the printing portion 2 is visible, and the entire printing portion of the nonwoven fabric 2 is visually perceived in a clear state through the crepe paper 1 in a wet state due to moisture content of the laminated paper 10. A unique effect is exhibited.

Specifically, in the laminated paper 10, the thickness of the crepe paper 1 is set to an arbitrary value within a range of ^{20 to} 50 g / m ² , and more preferably within a range of 20 to 40 g / m ² in basis weight. Is set to any value within the range of 30 to 40 g / m ² , more preferably set to any value within the range of 30 to 35 g / m ^2. , even more preferably, it is set to any value in any value or range of 33~35g / m ² in the range of 30~33g / m ^2, and most preferably, the value or about about 33 g / ^{m 2} The value is set to 35 g / m ² . For example, the thickness of the crepe paper 1, basis ^{weight, 35g / m 2, 27g /} m 2, or can be set to a value of 23 g / m ^2. As a result of extensive research on the relationship between the crepe bottle of the crepe paper 1 and the thickness of the crepe paper 1, the inventor is required for the crepe paper 1 of the laminated paper 10 when the thickness of the crepe paper 1 falls outside the above range. It was found that the desired physical properties could not be secured. 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 sheet of the crepe paper 1 (the crepe is not formed). It was found that when the feeding speed of the paper sheet in the state was increased, crepes could not be formed on the raw material 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 non-woven fabric 2 to form the laminated paper 10, and heat is applied to the non-woven fabric 2 at the heat fusion part 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. There is a possibility that the crepe paper 1 cannot be bonded to the nonwoven fabric 2 because it does not melt sufficiently, cannot exhibit the desired adhesive force to the crepe paper 1.

Further, when the thickness of the crepe paper 1 exceeds 40 g / m ² in basis weight, it is necessary to extremely reduce the feeding speed of the raw material sheet in order to produce the crepe paper at the time of production by the crepe paper production apparatus. From this point, 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 basis weight, the crepe may be creped depending on the performance of the crepe paper manufacturing apparatus even when the feed speed of the raw material sheet is lowered at the time of manufacture by the crepe paper manufacturing apparatus. From this point, it is preferable to set the upper limit of the thickness of the crepe paper 1 to 35 g / m ² because the paper itself may be difficult to manufacture.

[Total thickness of laminated paper (total thickness of crepe paper and nonwoven fabric)]
As described above, the crepe paper 1 and the non-woven fabric 2 which are constituent elements of the laminated paper 10 are each configured to have an arbitrary thickness within a predetermined range, and the total thickness of the 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 / m ² in basis weight, and the thickness of the nonwoven fabric 2 is in basis weight. with 20 g / ^{m 2,} to make the total thickness and (35 + 20 + 35 =) 90g / 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 the laminated paper 10 is manufactured, the raw material sheet of the laminated paper 10 (that is, the raw material sheet in which one nonwoven fabric raw material sheet is interposed between a pair of crepe paper raw material sheets) is cut at a predetermined feeding position. (I.e., when the raw material sheet of the laminated paper 10 is cut into a predetermined length according to the purpose of use), the cutting can be performed most favorably, and the manufacturing efficiency can be improved and the yield can be improved. .

[Effect of laminated paper with printing section]
As described above, the laminated paper 10 having the printing unit exhibits a unique design effect because the printing unit such as the pattern unit 13 and the advertising unit 14 has an appearance and appearance that are half-lifted through the crepe paper 1. can do. Specifically, since the transmittance (transmittance) of the dried crepe paper 1 is relatively low when the laminated paper 10 is in a dry state, the pattern or advertisement on the printing unit is not clear through the crepe paper 1. However, although it is in a state that can be visually recognized to some extent, in the wet state of the laminated paper 10 due to the water content, the transmittance (transmittance) of the wet crepe paper 1 is relatively high. And the advertisement are visually recognized in a clear state through the crepe paper 1, and the presence of the crepe paper 1 exhibits a specific effect that the advertisement is visually recognized as if it is raised from the laminated paper 10.

[Effect of printed part when it is provided on non-woven fabric]
Further, as described above, since the laminated paper 10 is configured as described above, the laminated paper 10 can include a printing unit on which a pattern unit 13 and an advertising unit 14 that are not conventionally used are printed. Thus, for example, as compared with a conventional color paper towel (paper towel whose entire surface is colored with a single color), the laminated paper 10 is printed as compared with the one simply colored on the raw fibers (pulp, etc.) of the raw material sheet of the towel. Due to the pattern part 13 and the advertising part 14 as parts, the product is very rich in design. Further, since the laminated paper 10 is formed by sandwiching the nonwoven fabric 2 provided with the printing portion between the pair of crepe papers 1, the soft impression is visible when the pattern or advertisement of the printing portion is viewed from the outside. Giving a unique visual effect. In particular, when the laminated paper 10 is applied to sanitary paper supplies such as paper towels, which are the main use, the laminated paper 10 as a sanitary paper article is usually provided to the user after being wetted and wetted. The user wipes off dirt or the like on the hand or part of the body with the laminated paper 10 in the state. In this case, it is necessary to prevent the printing ink in the printing section of the laminated paper 10 from being dissolved by moisture and eluted from the crepe paper 1 to adhere to the user's hand or body. However, in the conventional color paper towel, since the whole is colored with a predetermined single color printing ink, the printing ink is exposed on the surface of the color paper towel. Therefore, it is necessary for the conventional color paper towel to be an organic solvent type printing ink so that the printing ink exposed on the surface dissolves and does not touch the user's hand or skin when wet with water. Yes, as described above, the influence of the volatile components of the organic solvent cannot be denied.

  On the other hand, as described above, the laminated paper 10 of the present embodiment uses flexographic printing 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 formed with the crepe paper 1 respectively. In order to cover completely, the printing ink of a printing part is not directly exposed on the surface of the laminated paper 10, but the state shielded by the crepe paper 1 is always maintained. Therefore, the laminated paper 10 has a configuration in which the printing ink does not come into direct contact with the user's hand or skin even when used in a wet state even when wet, even though the printing unit is provided. Can be provided as a safe and harmless laminated paper 10, and can be provided as an environmentally friendly laminated paper, and for that purpose, it is necessary to use organic solvent type printing ink like conventional color paper towels Has the advantage of not. The water-based ink as the printing ink for the printed portion of the laminated paper 10 is preferably a pigment-type water-based ink. In this way, the printed portion of the nonwoven fabric 2 is printed in a wet state when the laminated paper 10 is wet. It is possible to effectively prevent the ink from being easily dissolved and eluted to the outside.

[Manufacturing method of laminated paper having printing part (width dimension of nonwoven material sheet)]
Next, the manufacturing method of the laminated paper 10 which has a printing part is demonstrated. In general, a nonwoven fabric is a web (also called a fleece) manufactured from a predetermined raw fiber made of natural fiber (pulp) or synthetic fiber by a predetermined web forming method such as a dry method, a wet method, or a spunbond method, The fibers of the web are manufactured by being bonded by a predetermined bonding method such as a chemical bond method, a thermal bond method, a needle punch method, or a water current method. On the other hand, the laminated paper 10 of the present embodiment preferably uses a nonwoven fabric made of the core-sheath composite fiber as the nonwoven fabric 2, but the nonwoven fabric 2 is an air-through method which is a kind of the thermal bond method. It is more preferable to use a non-woven fabric (hereinafter referred to as “air-through non-woven fabric” for convenience of explanation) manufactured by bonding fibers. This air-through non-woven fabric has advantages such as excellent extensibility and flexibility, giving the user a soft feel and good touch feeling, and the crepe paper 1 as a non-woven fabric 2 after heat-sealing. However, even when the above is described, it is possible to develop a good adhesive force. Further, details will be described in the section of laminated paper manufacturing apparatus and laminated paper manufacturing method described later. In the production of laminated paper 10, a raw material sheet of a pair of crepe papers 1 (hereinafter referred to as “crepe paper raw material sheet”). A raw material sheet (hereinafter referred to as a “nonwoven fabric raw material sheet”) of the nonwoven fabric 2 is sandwiched between them to form a three-layer (three-layered) raw material sheet (hereinafter referred to as a “laminated raw material sheet”). Then, the laminated raw material sheet is fed between, for example, a pair of heat seal rollers, and a pair of crepe paper raw material sheets are thermally fused and integrated with the nonwoven fabric raw material sheet by the pair of heat seal rollers, respectively. A typical laminated paper. At this time, the crepe paper raw material sheet and the nonwoven fabric raw material sheet usually have a width direction dimension (for example, a width direction dimension of 1200 mm) having the same width of a predetermined width. In particular, if the width-direction dimension of the nonwoven material sheet is smaller than the width-direction dimension of the crepe paper sheet, a portion where the crepe paper sheet cannot be heat-sealed to the nonwoven material sheet at the width direction end of the laminated material sheet occurs. Therefore, it is not preferable that the dimension in the width direction of the nonwoven fabric raw material sheet is smaller than the dimension in the width direction of the crepe paper raw material sheet.

[Setting of width direction dimension of nonwoven material sheet according to nonwoven material]
On the other hand, as described above, when the nonwoven fabric 2 is provided with a printing section, the nonwoven fabric raw material sheet is supplied in advance to a predetermined printing apparatus, and the predetermined printing section is printed on the raw material sheet. At this time, when the air-through nonwoven fabric is used as the nonwoven fabric, it is considered that the elasticity is large, but since the knowledge that the nonwoven fabric raw material sheet shrinks due to heat during printing has been obtained, this effect is considered. As a result of intensive research on the invention of the laminated paper, the following configuration was conceived. That is, when forming a printing part on the laminated paper 10, for example, when forming a printing part using flexographic printing, if the printing part is printed on the nonwoven fabric raw material sheet 2 having a width of 1200 mm, The width shrinks from 1200 mm to 1150 mm (ie, shrinks to a width of about 96% of the original width), or otherwise the width of the nonwoven material sheet shrinks from 1300 mm to 1200 mm (ie, the original width) The present inventor has obtained the knowledge that it shrinks to a width of about 92% of the width. In consideration of the shrinkage of the nonwoven material sheet at the time of printing, the present inventor also tried to print the nonwoven material sheet in a state of being stretched in the width direction (by the amount of shrinkage). It was found that it was difficult to perform the intended printing. Therefore, in the manufacturing method of the laminated paper 10 having a printing portion, the width of the laminated paper 10 to be actually obtained according to the shrinkage rate in order to compensate for the shrinkage at the time of printing on the nonwoven material raw sheet as the nonwoven material raw sheet. A non-woven fabric raw material sheet having a width larger than a predetermined ratio is used (that is, the non-woven fabric raw material sheet width is set so as to compensate for the shrinkage size according to the shrinkage rate).

  The inventor has experimentally used a nonwoven material sheet having a width of 1200 mm, for example, and when the printed portion is printed on the nonwoven material sheet, the nonwoven material sheet shrinks after printing and has a width of 1150 mm. (That is, a width 50 mm smaller than the width before printing or a width about 4% smaller than the width before printing). Therefore, in the production of the laminated paper of the present embodiment, a non-woven fabric is used as a base paper having a size that is about 4% (about 4.12%) larger than that required after shrinkage. For example, when the width of the raw material sheet of laminated paper is 1200 mm, the width of the crepe paper raw material sheet is the same 1200 mm, but the width of the non-woven raw material sheet is about 4% larger than 1200 mm (for example, 1250 mm Width).

[Peculiar effect by setting width dimension of non-woven fabric sheet]
According to the method for producing a laminated paper using the nonwoven fabric raw material sheet having the widthwise dimension set as described above (that is, the widthwise dimension is set so as to compensate for the shrinkage rate during printing of the nonwoven fabric raw material sheet) 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 fabric 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% smaller than the width before printing). Therefore, a laminated paper raw sheet having a three-layer structure in which the printed nonwoven fabric raw sheet (width: about 1200 mm) is laminated between a pair of crepe paper raw sheets (width: 1200 mm) is a crepe as a pair of outer layers. The paper raw material sheet and the nonwoven 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 having a width of 1200 mm. The desired width is 1200 mm.

Embodiment 2 (Laminated paper in which printing section is provided on crepe paper)
[Overall configuration of laminated paper and configuration of crepe paper]
As shown in FIG. 5, in the example of the first embodiment, the laminated paper 10 has a three-layer structure (a stacked structure of three sheets) composed of a pair of crepe paper 1 and one nonwoven fabric 2. And although it has the structure which provided the printing layer 2a of the printing part on the surface of the nonwoven fabric 2 as an intermediate | middle layer sheet, in the laminated paper 10 of the three-layer structure of Embodiment 2, as shown in FIG. A printing layer 1a of the printing unit is provided on the inner surface of the crepe paper 1 as a sheet. That is, in the second embodiment, the laminated paper 10 includes a pair of crepe papers 1 as outer layer sheets and a nonwoven fabric as one or more intermediate layer sheets disposed in a laminated state between the pair of crepe papers 1. 2 as a multi-layer structure (a multi-layer structure of three or more layers), and as an inner surface (that is, as an inner surface of the laminated paper 10), on the inner surface of one crepe paper 1 as an outer layer sheet The printing portion is provided, and the crepe paper 1 is bonded to the nonwoven fabric 2 by heat fusion and pressure bonding with the heat fusion portion 1. In addition, the inner surface of the crepe paper 1 is overlapped by sandwiching the nonwoven fabric 2 as one (or more) intermediate layer sheets between a pair of crepe papers 1 as an outer layer sheet, and the laminated paper 10 having a laminated structure. Is a surface that comes to the inside of the laminated structure of the laminated paper 10 (that is, the side facing the nonwoven fabric 2). Here, as for both surfaces of the crepe paper 1, one surface has a high smoothness (that is, a relatively smooth surface and a good touch feeling), and the other surface has a low smoothness (that is, a smooth surface). The laminated paper 10 according to the second embodiment has the above-described laminated structure with the front surface side of the crepe paper 1 as the inner surface side. Is preferred.

[Special effects of printing on the inner surface (surface) of crepe paper]
According to the laminated paper 10 of the second embodiment, the nonwoven fabric 2 is interposed between the pair of crepe papers 1 and the crepe paper 1 is thermally fused to the nonwoven fabric 2 by the thermal fusion part 1. The present inventors have confirmed through experiments that the crepe paper 1 is more securely and firmly bonded to the nonwoven fabric 2 when being fixed. In addition to this, when the printing layer 1a of the printing unit is provided on the inner surface of the crepe paper 1 as in the second embodiment, the inner surface of the crepe paper 1 provided with the printing layer 1a (that is, printing with printing ink) Since it becomes the said surface with high smoothness, the desired pattern part 13 and the advertisement part 14 can be printed in a more favorable state, and print quality can be improved more. In the second embodiment, since the printing unit is provided on the inner surface of the crepe paper 1, the printing unit does not come into contact with the user's fingers and skin (skin), and thus relates to direct contact with the printing ink. The user's anxiety can be eliminated and health problems caused by printing ink can be reliably prevented. When the printing unit is provided on the laminated paper 10, the printing unit is provided in the middle of the laminated paper 10 as in the first embodiment rather than the crepe paper 1 that is the outer layer of the laminated paper 10 as in the second embodiment. It is preferable in terms of print quality to provide a printing portion on the nonwoven fabric 2 that is a layer (that is, an inner layer).

[Each thickness of crepe paper, non-woven 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 total thickness of the laminated paper 10 can be set in the same manner as in the first embodiment.

Embodiment 3 (Laminated paper in which a colored portion is provided in an intermediate layer sheet)
[Overall configuration of laminated paper and configuration 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 printing unit is provided on the surface of the nonwoven fabric 2 as an intermediate layer sheet. As shown in FIG. 2, in the second embodiment, the laminated paper 10 has a three-layer structure and a configuration in which a printing unit 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 the third embodiment, the intermediate layer sheet is composed of a non-permeable sheet 5 made of a synthetic resin film (for example, a non-permeable sheet or a water-resistant sheet). The printing layer 5 a of the printing unit is provided on the surface of the non-permeable sheet 5. That is, in the third embodiment, the laminated paper 10 is a non-transparent as a pair of crepe paper 1 as an outer layer sheet and a single intermediate layer sheet disposed between the pair of crepe papers 1. A multi-layer structure (three-layer structure) composed of the conductive sheet 5, and the printing section is provided on the surface of the non-permeable sheet 5 as an inner surface thereof (that is, as an inner surface of the laminated paper 10). The crepe paper 1 is bonded to the non-permeable sheet 5 by heat fusion and pressure bonding by the heat fusion part 1. Examples of the non-permeable sheet 5 include a resin film or a resin sheet made of polyvinyl chloride resin, a polyolefin resin (made of polyethylene resin, polypropylene resin, etc.) in addition to what is generally called a vinyl sheet or a vinyl film. A resin film, a resin sheet, etc. can be used conveniently. Further, the thickness of the non-permeable sheet 5 is preferably set to a predetermined thickness within a range of 0.1 mm to 0.2 mm, for example. The non-permeable sheet as the non-permeable sheet 5 has a main function of blocking moisture permeation, but the non-permeable sheet is a non-permeable sheet (hereinafter, “ You may comprise by the "non-oil-permeable sheet". In addition, in the present application document, when simply referred to as “non-permeable sheet”, it includes the non-oil-permeable sheet in addition to the non-permeable sheet, and also blocks the transmission of other liquids and some gases. Including things. In other words, in the present invention, the non-permeable sheet may be a sheet or a film made of a synthetic resin that blocks moisture and / or oil permeation as the intermediate layer sheet.

[Special effects of non-permeable sheet]
According to the laminated paper 10 of the third embodiment, the non-permeable sheet 5 including the non-permeable sheet and the non-oil permeable sheet as the intermediate layer sheet blocks the transmission of moisture and oil. In addition to typical products such as paper towels, it can be applied to wrapping paper for temporary or long-term wrapping of objects and articles with moisture or oil on it. Can be enlarged.

[Scope of Invention of Laminated Paper of Embodiments 1 to 3]
By the way, the invention of the laminated paper 10 according to the first to third embodiments is mainly characterized in that a printing unit 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 according to the first to third embodiments is different from the above-described embodiment in the configuration other than the printing unit (configuration such as the heat-sealing unit) as long as it includes such a printing unit. It can be. That is, the laminated paper 10 has a multi-layer structure composed of an outer layer sheet and an intermediate layer sheet, and as long as the printing unit is provided on the inner surface side thereof, the configuration of the heat-sealing portion and the configuration of other elements or portions are the same. Any configuration can be adopted. For example, in the laminated paper provided with the printing unit of the present invention, in addition to the heat-bonding unit row having a broken line shape as in the first embodiment, the configuration may be a wavy line of another configuration, a dotted line, It can also be a chain line consisting of a chain line such as a chain line or a two-dot chain line, or it can be a zigzag line, a staggered line, or a linear line consisting of a solid line, Alternatively, the present invention can be embodied in a laminated paper in which dot-like heat fusion parts are scattered. However, in order to obtain a sufficient volumetric effect during use by obtaining a sufficient expansion effect over the entire laminated paper after the moisture content of the laminated paper, the heat-sealed portion row is broken (or chained) as in the above embodiment. It is preferable to use a linear shape.

[Invention of laminated paper without printing section]
On the other hand, among the configurations of the laminated paper 10 described in the first embodiment, the following configurations are novel and inventive in view of the prior art even by the configurations alone. That is, in addition to the invention of the laminated paper provided with the printing section as described above (hereinafter referred to as “the first laminated paper invention”), the thickness of the nonwoven fabric is within the predetermined range, and the thickness of the crepe paper. Of the laminated paper having a thickness within the predetermined range (hereinafter referred to as “second invention of laminated paper”), and the width of the heat-sealed portion in the width direction according to the crepe rate of the crepe paper. The invention of the laminated paper within the predetermined range (hereinafter referred to as “the third invention of laminated paper”) is the invention itself (that is, even when it does not include a printing section), and is novel and Has an inventive step.

[Invention of second laminated paper (crepe paper thickness range and nonwoven fabric thickness range)]
Specifically, the invention of the second laminated paper comprises a 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-sealing part array extending in a direction orthogonal to the direction in which the crepe bottle of the crepe paper extends, and further, the crepe paper is The nonwoven fabric has a thickness within a range of ^{20 to} 50 g / m ² , and the nonwoven fabric has a basis weight and a thickness within a range of 15 to 25 g / m ² .

[Invention of third laminated paper (crepe rate of crepe paper and heat fusion part interval in width direction)]
The invention of the third laminated paper comprises a crepe paper as a pair of outer layer sheets and a heat-fusible intermediate layer sheet disposed in a laminated state between the crepe paper, and the crepe paper The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing part row extending in a direction orthogonal to the direction in which the crepe bottle extends, and further, the adjacent heat-sealing part row The width-wise heat fusion part interval, which is the interval between the width direction center lines, is set to an arbitrary value within a predetermined range corresponding to the range of the crepe rate of the crepe paper, and the crepe rate of the crepe paper is When in the range of 20% to 26%, the thermal fusion part interval in the width direction is set within the range of 10 mm to 15 mm, and when the crepe rate of the crepe paper is within the range of 26% to 30%, The interval between the heat-sealed portions in the width direction is in the range of 15 to 25 mm. And wherein the set to.

Embodiment 4 (Laminated paper having an improved nonwoven fabric in an intermediate layer sheet)
[Configuration of non-woven fabric]
The laminated paper of the present invention can be embodied as described below as having a feature in the configuration of the nonwoven fabric as the intermediate layer sheet. In detail, in the laminated paper of Embodiment 4, a nonwoven fabric consists of a nonwoven fabric with a high expansion-contraction rate, and specifically consists of a nonwoven fabric manufactured using what is called a core sheath structure fiber so that it may mention later. That is, the conventional nonwoven fabric is made of a so-called pulp nonwoven fabric, and is manufactured by accumulating fibrous materials obtained by pulverizing wood pulp in a web shape and joining them together to form a sheet-like portion. Moreover, the conventional paper towel is generally manufactured from a 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, if it demonstrates using sectional drawing of FIG. 5, the laminated paper 10 of Embodiment 4 will use the nonwoven fabric of the air through type (thing manufactured by the thermal bond) containing air as an intermediate | middle layer sheet | seat. can do. If it carries out like this, while the laminated paper 10 becomes thickness as a whole, while becoming a structure which is rich in a stretching property, it becomes a structure which has a touch feeling good and has heat-fusibility. Furthermore, the nonwoven fabric of the laminated paper of Embodiment 4 consists of the nonwoven fabric manufactured using what is called a core-sheath structure composite fiber as a raw material. This core-sheath composite fiber is a short fiber synthetic fiber, PE / PP, PE / PET composite fiber) produced by a dry method, etc., as a raw material for a nonwoven web (fiber accumulation layer sometimes called fleece). As a method for bonding fibers, an air-through method is used as a method for bonding the fibers (that is, by passing hot air from the front surface to the back surface in the thickness direction of the web, the sheath portion of the composite fiber is used. It is bonded by melting the resin and bonding the fibers). Moreover, this core-sheath structure fiber is a fiber whose outer sheath is PE (polyethylene) and whose inner (center portion) core is PET (polyethylene terephthalate). Since this nonwoven fabric has a soft texture because it does not use an adhesive for bonding between fibers, but has no water absorption, when the printing unit is provided on the nonwoven fabric 2 as in the laminated paper 10 of the first to third embodiments. When the laminated paper 10 is hydrated, the nonwoven fabric 2 does not supply moisture to the printing ink of the printing layer 2a on the surface due to hydration. Therefore, this laminated paper 10 exhibits the additional specific effect that the printing quality of the printing part of the nonwoven fabric 2 can be maintained satisfactorily. In addition, the nonwoven fabric can soften the PE in the sheath portion at a low temperature so that the crepe paper 1 can be satisfactorily bonded by the heat-sealing portion 11 of the laminated paper 10, while the PET in the core portion is the fiber itself. Maintain the strength and maintain the overall strength of the nonwoven. That is, in this nonwoven fabric, the sheath portion of the core-sheath structure exhibits an adhesive force and functions as an adhesive for crepe paper, while the core portion contributes to strength maintenance.

  In addition, as a material of the core-sheath structure fiber of this nonwoven fabric, polyethylene (PE) has a melting point around 120 ° C. (that is, a low-density PE having a melting point of 95 to 130 degrees or 114 to 126 ° C., a melting point of 120 to 140 ° C. Alternatively, a high-density PE of 126 to 137 ° C.) can be used. Usually, a low-density PE is used, but a PE having a density at which the melting point is about 120 ° C. may be used. On the other hand, as the polypropylene (PP), one having a melting point of about 140 ° C. (that is, a PP having a low melting point type) can be used. There are three types of PP: random PP for copolymerization, block PP for copolymerization, and homoPP for homopolymerization. HomoPP has a melting point of 160 to 165 ° C. Since it becomes 140-150 degreeC (or 160-165 degreeC), in the case of block PP, the thing of the low melting point side is used. Moreover, the random PP having the lowest melting point may have a melting point of about 135 to 145 ° C. or a melting point of 135 to 150 ° C. In this Embodiment, random PP can be used as PP of the raw material fiber of a nonwoven fabric, In this case, melting | fusing point of random PP becomes a low melting point of 125 degreeC.

[Type of non-woven fabric (type by melting point)]
In the laminated paper of the present invention, when the nonwoven fabric as the intermediate layer sheet is an arbitrary nonwoven fabric, there are some nonwoven fabrics in 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 thermal fusion component (for example, a core) of the nonwoven fabric 2 at a predetermined heating temperature at the time of thermal fusion by the thermal fusion section 11 in the laminated paper manufacturing apparatus. A non-woven fabric having a melting point so that the non-woven fabric 2 is securely adhered to the non-woven fabric 2 by PE or the like of the sheath portion of the sheath structure fiber is used. In particular, the laminated paper of the present invention, including the laminated paper 10 of the first to third embodiments, has such a small amount because it has a structure in which a pair of crepe papers are bonded to the nonwoven fabric by the adhesive force of only the linear heat-sealed portion rows. The kind of the nonwoven fabric is selected so that a sufficient bonding force can be obtained between the crepe paper and the nonwoven fabric with a sufficient bonding area. As such a nonwoven fabric, it is a core-sheath type composite fiber as a polyester-type composite fiber, Comprising: The nonwoven fabric manufactured using the heat-fusion fiber for nonwoven fabrics can be used. For example, as the nonwoven fabric in this case, a nonwoven fabric manufactured from a core-sheath composite fiber having a fineness of 2.2 dtex, a cut length of 5 mm or 10 mm, and a sheath component softening point of about 110 ° C., or a fineness of 1.7 dtex and a cut length of 5 mm A non-woven fabric manufactured from a core-sheath type composite fiber having a sheath component softening point of about 110 ° C. or a non-woven 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. Or you may use the nonwoven fabric which mixed two or more types of said core-sheath-type composite fiber suitably, and was used as raw material fiber.

Embodiment 5 (Laminated paper manufacturing apparatus)
The laminated paper of the present invention, including the invention of the laminated paper 10 of the first to third embodiments, is preferably manufactured using a laminated paper manufacturing apparatus described below.

[Configuration of manufacturing equipment]
As shown in FIG. 9, the laminated paper manufacturing apparatus of the fifth embodiment is provided with three support rollers 51, 52, and 53 arranged side by side on a crepe paper raw material sheet (one of the pair of crepe papers). Roll-shaped crepe paper 21 to be a crepe paper raw material sheet), roll-shaped non-woven fabric 22 to be a raw material sheet (non-woven fabric raw material sheet) of the nonwoven fabric, and a raw material sheet of the other crepe paper of the pair of crepe papers (crepe paper raw material sheet) ) And the other rolled crepe paper 23 are supported so as to be freely rotatable. In addition, the one crepe paper 1, the nonwoven fabric 2, and the other crepe paper 1 drawn from the one roll crepe paper 21, the roll nonwoven fabric 22, and the other roll crepe paper 23 are respectively laminated. (I.e., in a three-layer laminated state) to constitute a raw material sheet (laminated paper raw material sheet) of the laminated paper 10. This laminated paper raw sheet is folded back by the first guide roller 61 and guided between the first heat seal roller 70 as one pressure roller and the second heat seal roller 80 as the other pressure roller. be introduced. The laminated paper material sheet is guided by the second guide roller 62 by folding back the second heat seal roller 80 from the first guide roller 61, and the second heat seal roller 70 and the second heat seal roller 70. The heat seal roller 80 is inserted. The laminated paper raw material sheet before being inserted between the first heat seal roller 70 and the second heat seal roller 80 is heat in a state where the crepe paper 1 and the nonwoven fabric 2 are not thermally fused. It is the laminated paper 10X before fusion.

  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-sealing portion 11. The laminated paper raw material sheet at the stage after the thermal fusion is a laminated paper 10Y after thermal fusion in which the crepe paper 1 and the nonwoven fabric 2 are thermally fused. Then, the elongated laminated paper 10Y (as the base paper before cutting) derived from the first and second heat seal rollers 70 and 80 is composed of the third guide roller 63 and the fourth guide. It is folded back by the roller 64 and guided to the winding roller 55. The take-up roller 55 takes up the laminated paper 10Y after heat fusion to form a roll-like laminated paper 10R. The roll-shaped laminated paper 10R is removed from the take-up roller 55 and used as a base paper such as a paper towel. In addition, a slitter is disposed between the fourth guide roller 64 and the take-up roller 55, and after heat sealing, the laminated paper 10R is cut into a plurality of pieces in the width direction, and a plurality of laminated papers 10 having a predetermined width are arranged in parallel. Then, it is designed to be wound around a winding roller.

[Heat seal roller]
Next, the first and second heat seal rollers 70 and 80 will be described in detail with reference to FIGS. FIG. 10 shows a state where the first and second heat seal rollers 70 and 80 of FIG. 9 are viewed from the upper surface side, and the first and second heat seal rollers 70 and 80 have axes parallel to each other. As described above, they are arranged side by side in front of and in the supply direction of the laminated paper 10X before heat sealing. The first and second heat seal rollers 70 and 80 have the same predetermined roller length L (for example, an arbitrary axial length within a range of 1200 mm to 1500 mm) and the same predetermined roller diameter. D (for example, a diameter of an arbitrary value within the range of 180 mm to 300 mm).

[First heat seal roller]
As shown in FIGS. 9 and 10, the first heat seal roller 70 is formed in a cylindrical shape having the predetermined roller diameter D, and a non-pressure-bonding portion 71 having a ring groove shape with a constant width is formed on the peripheral surface thereof. And the thermocompression-bonding convex part 72 which makes the broken-line convex ring shape (or broken-line ridge shape) of a fixed width are arranged in parallel mutually so that it may become every other in the axial direction. As shown in FIG. 11, each of the non-compression bonding portions 71 intermittently extends as an arcuate surface in the circumferential direction along the circumferential surface of the first heat seal roller 70, and is a crimping surface that becomes a flat surface in the width direction. It has a surface 72a. Specifically, each of the thermocompression-bonding convex portions 72 linearly extends by a predetermined length in the circumferential direction along the peripheral surface of the first heat seal roller 70 (as the peripheral surface of the thermocompression-bonding convex portion 72). The pressure-bonding surface 72 a is continuously arranged at a constant interval in the circumferential direction of the first heat seal roller 70. The thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 is an arcuate surface (curved surface) in the length direction, and the arc length is the first heat fusion part 11a or the first heat fusion part 11a of the heat fusion part row 11. It is set to the same length as the length of the second heat-sealing part 11b. In addition, the thermocompression bonding surface 72a of the thermocompression-bonding convex portion 72 has a flat surface shape in the width direction, and the width thereof is the first heat-sealing portion 11a or the second heat-sealing portion of the heat-sealing portion row 11. It is set to the same width as the width of the fusion part 11b. Further, the gap between the adjacent thermocompression bonding surfaces 72a of the thermocompression bonding convex portions 72 of each row is determined by the adjacent first heat fusion portion 11a or second heat fusion bonding of the heat fusion portion row 11. It is set to the same size as the gap between the portions 11b.

  As described above, the first heat seal roller 70 is formed with the thermocompression-bonding convex portions 72 having a dotted-line convex ring shape on the entire circumference in the circumferential direction, and the one-line heat-sealing portion row 11 of the laminated paper 10 is formed. It is configured to form. Further, the first heat seal roller 70 is configured such that the multiple rows of thermocompression-bonding convex portions 72 are spaced from each other at a constant interval that is the same as the arrangement interval in the width direction of the multiple rows of the heat-sealed portion rows 11 of the laminated paper 10. In order to be parallel, they are continuously arranged in parallel throughout the axial direction. Thereby, the 1st heat seal roller 70 has the non-compression-bonding part 71 which makes a ring groove shape between the adjacent thermocompression-bonding convex parts 72, respectively. Further, the first heat seal roller 70 has a plurality of rows of non-crimping portions 71 arranged in the axial direction so as to be parallel to each other at the same fixed intervals as the non-fused portions 12 of the laminated paper 10. They are continuously arranged side by side. Further, in the first heat seal roller 70, the thermocompression bonding surface 72 a of the thermocompression bonding convex portion 72 of the adjacent row has the center position in the length direction of the thermocompression bonding surface 72 a of one thermocompression bonding convex portion 72. The positions of the first heat seal rollers 70 in the circumferential direction are shifted from each other so as to be at an intermediate position of the gap between the adjacent thermocompression bonding surfaces 72a of the thermocompression protrusions 72. As a result, as shown in FIGS. 11, 12, and 13, the thermocompression-bonding protrusions 72 are formed in the first row of thermocompression-bonding protrusions 11 </ b> A corresponding to the heat-bonding portion row 11 </ b> A of the first row of the laminated paper 10. 72A and a second row of thermocompression-bonding convex portions 72B corresponding to the second row of heat-sealing portion rows 11B. And the thermocompression-bonding convex part 72A of the 1st row | line | column respond | corresponds to the 1st heat-fusion part 11a of the heat-fusion part row | line | column 11A of the 1st row | line, the thermocompression-bonding surface 72a is made into the 1st heat seal roller. 70 in the circumferential direction of the second row, the thermocompression-bonding convex portion 72B of the second row has a thermocompression-bonding surface 72a corresponding to the second heat-fusion portion 11b of the heat-fusion portion row 11B of the second row. The first heat seal roller 70 is arranged in the circumferential direction.

  Further, as shown in FIG. 10, the thermocompression bonding surface 72a of the heat fusion convex portion 72 extends linearly in a plan view (in the circumferential direction of the second heat seal roller 70, a curved line is formed along the circumferential surface thereof. ) And a semicircular curved portion 72y at both ends in the length direction of the linear thin strip portion 72x. As a result, heat fusion of 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 72a of the thermocompression-bonding convex portion 72 of the heat seal roller 70. Each of the heat fusion portions 11a and 11b of the attachment portion row 11 corresponds to the outer shape of each thermocompression bonding surface 72a, as shown in FIGS. 1 and 2, and FIG. And a semi-circular portion at both ends in the length direction of the linear thin strip portion. Further, as shown in FIG. 13, on both sides in the width direction of the thermocompression bonding surface 72a of each thermocompression bonding convex portion 72, a pair of side surfaces 72b extend perpendicular to the thermocompression bonding surface 72a.

[Second heat seal roller]
On the other hand, as shown in FIGS. 9 and 10, the second heat seal roller 80 is formed in a cylindrical shape having the predetermined roller diameter D, and a non-pressure-bonding ring having a ring groove shape with a constant width is formed on the peripheral surface thereof. The portions 81 and the thermocompression-bonding convex portions 82 having a convex ring shape (or ridge shape) having a constant width are arranged in parallel with each other so that every other portion is in the axial direction. As shown in FIG. 11, each of the non-bonding portions 81 is continuously formed as an arcuate surface in the circumferential direction along the circumferential surface of the second heat seal roller 80 (that is, the circumference of the second heat seal roller 80 is It has a crimping surface 82a (as the circumferential surface of the thermocompression-bonding projection 82) that extends along the entire circumference of the surface and is flat in the width direction. The thermocompression-bonding surface 82a of the thermocompression-bonding projection 82 is an arcuate surface (curved surface) in the length direction. In addition, the thermocompression bonding surface 82a of the thermocompression-bonding convex portion 82 is a flat surface in the width direction, but the width is the first heat-sealing portion 11a of the heat-sealing portion 11 or the second heat-sealing portion. The width is set to be larger than the width of the landing portion 11b (that is, the width 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 seal roller 80 has the thermo-compression projections 82 each having a convex ring shape at the positions facing the thermo-compression projections 72 of the first heat seal roller 70 in the circumferential direction. Formed over. As a result, the laminated paper 10X before thermal fusion is sandwiched between the thermocompression-bonding convex portion 72 of the first heat-sealing roller 70 and the thermocompression-bonding convex portion 82 of the second heat-sealing roller 80. Between the thermocompression bonding surface 72a of the portion 72 and the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82, the crepe paper 1 of the laminated paper 10X before thermal fusion is thermocompression bonded and thermally bonded to the nonwoven fabric 2, thereby the lamination. A heat-sealed portion row 11 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 the same as that of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat sealing roller 70. The width is set to a certain size larger than the width, 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 heat fusion bonding portion 11 of the laminated paper 10). When placed in a substantially intimate state (with a minute gap) on both sides in the width direction of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72, respectively, A constant width portion is exposed. Thereby, the crepe paper 1 of the laminated paper 10X before thermal fusion is bonded to the nonwoven fabric 2 between 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. In this case, both end edges in the width direction 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. External force (particularly, shearing force) applied to the pre-heat-bonded laminated paper 10X from both edges in the width direction of 72a can be greatly reduced. That is, if the width of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 and the width of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 are the same width, the thermocompression bonding convex portion 72 and the thermocompression bonding surface 72a When the crepe paper 1 of the pre-heat-bonded laminated paper 10X is heat-bonded and heat-bonded to the nonwoven fabric 2 between the heat-bonding surface 82a of the pressure-bonding convex portion 82, Both end edges in the width direction are arranged at the same positions as both end edges in the width direction of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82, and heat fusion is performed from both end edges in the width direction of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72. Since an external force (especially shearing force) applied to the pre-attached laminated paper 10X becomes large, there is a possibility that a part of the pre-heat-bonded laminated paper 10X (particularly the crepe paper 1) is cut or damaged. However, as shown in FIG. 13, the width of the thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82 of the second heat-sealing roller 80 is equal to the width of the thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72 of the first heat-sealing roller 70. If the width is set larger than the width by a certain dimension, such a problem can be reliably prevented. Note that, on both sides in the width direction of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 of the second heat seal roller 80, the pair of side surfaces 82b are inclined at a predetermined angle with the thermocompression bonding surface 82a (inclination that becomes an obtuse angle). (At an angle). In this way, in the laminated paper manufacturing apparatus, the thermocompression bonding surfaces 72a and 82a of the thermocompression bonding convex portions 72 and 82 are more heat-resistant than the thermocompression bonding surface 72a of the upper heat sealing roller 70. The pressure-bonding surface 80 is wide, and the corners at both edges in the width direction of the thermocompression-bonding convex portion 92 of the lower heat seal roller 80 are cut (notched) to be tapered (chamfered) or rounded. A cut shape such as (curved chamfered shape) is preferable.

[Roller length and diameter]
The roller length L of the heat seal rollers 70 and 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, productivity may be reduced. On the other hand, when the roller length L of the heat seal rollers 70 and 80 is set to a value exceeding 1500 mm, a problem of a crown phenomenon described later may occur. The roller diameter D of the heat seal rollers 70 and 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, the pressure bonding force of the heat-bonded portion of the pre-heat-bonded laminated paper 10X by the heat-bonding convex portions 72 and 82 may be insufficient. On the other hand, when the roller diameter D of the heat seal rollers 70 and 80 is set to a value exceeding 300 mm, a problem of high cost occurs.

[Relationship between roller diameter and roller length of heat seal roller and pressing force during thermocompression]
In the thermocompression bonding operation of the pre-heat-bonding laminated paper 10X by the heat-sealing rollers 70, 80, the pre-heat-bonding lamination from the heat-bonding convex portions 72, 82 is caused by the roller diameter D and the roller length L of the heat-sealing rollers 70, 80. The inventor has obtained the knowledge that the pressing force applied to the heat-sealed portion of the paper 10X changes. In addition, in the thermocompression bonding operation of the pre-heat-bonded laminated paper 10X by the heat seal rollers 70 and 80, the inventor applies the heat-bonding convex portions 72 and 82 to the heat-bonded portion of the pre-heat-bonded laminated paper 10X. The pressing force (hereinafter referred to as “pressing force at the time of thermocompression bonding”) is used even when the heat seal rollers 70 and 80 have a small roller length L in order to reliably form the heat-sealing portions 11 and 11b. The knowledge that it is necessary to make it a value of at least 2 to 3 atmospheres or more has been obtained. Moreover, 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 in the range of 5.5 to 7.0 atm. That is, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, the heat-bonded laminated paper 10X has sufficient durability up to a pressure of 5 to 7 atm when the heat seal rollers 70 and 80 are thermocompression bonded. Therefore, this range is optimal as the pressing force during thermocompression bonding. If the pressing force at the time of thermocompression is 7 atm or more, the laminated paper 10X before heat fusion can be damaged (for example, it tears at a part corresponding to the corner of the thermocompression surface 72a of the thermocompression projection 72). There is sex.

  In addition, when the heat seal rollers 70 and 80 have a roller length L of 1400 mm and the pressure during thermocompression is 7 atm or more, the heat seal rollers 70 and 80 have a so-called crown phenomenon (the heat seal rollers 70 and 80 have a diameter of (A phenomenon in which a gap is generated between the heat seal rollers 70 and 80). When this crown phenomenon occurs, the heat seal rollers 70 and 80 are curved in the radial direction, and a drum-shaped gap is generated between the heat seal rollers 70 and 80 in front view. In this case, the gap in the radial direction generated between the heat seal rollers 70 and 80 is a minute interval, but a large range is curved in the length direction of the heat seal rollers 70 and 80, and the minute interval is within the large range. This will cause a gap. Therefore, the gap between the heat seal rollers 70 and 80 due to the crown phenomenon is a minute gap of 1 mm or less, but the thickness of the laminated paper raw sheet (laminated paper 10X before heat-sealing) is as thin as 1 mm or less. There is a possibility that the thermocompression bonding surfaces 72a and 82a of the rollers 70 and 80 float from the pre-heat-bonded laminated paper 10X, and a gap may be generated between them. In this case, the heat of the heat-sealing rollers 70 and 80 The heat-bonded portion of the pre-heat-bonded laminated paper 10X cannot be pressed 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 is 5.5 to 7.0 as described above. It is preferable to be within the range of atmospheric pressure. When the roller length L of the heat seal rollers 70 and 80 is 1400 mm and the pressing force at the time of thermocompression is less than 5.5 atm, the pre-heat-bonding laminated paper 10X is heat-sealed by the thermocompression-convex convex portions 72 and 82. There is a possibility that the part cannot be formed stably (that is, the adhesive force of the heat-sealed part may be insufficient). On the other hand, in the case where the roller length L of the heat seal rollers 70 and 80 is 1400 mm, if the pressing force at the time of thermocompression is set to a value exceeding 7 atm, excessive pressure is applied to the heat fusion portion of the laminated paper 10X before heat fusion. In addition, there is a possibility that the heat-sealed portion is cured at the time of bonding. Moreover, when the roller length L of the heat seal rollers 70 and 80 is 1200 mm, the pressing force at the time of thermocompression bonding can be set to 4.5 atm. Moreover, when the roller length L of the heat seal rollers 70 and 80 is 1500 mm, the pressing force at the time of thermocompression bonding can be in the range of 7.5 to 8.0 atm. When the roller length L of the heat seal rollers 70 and 80 is 1500 mm and the pressing force at the time of thermocompression is less than 7.5 atm, the pre-heat-bonded laminated paper 10X is heat-sealed by the thermocompression-bonding convex portions 72 and 82. There is a possibility that the part cannot be formed stably (that is, the adhesive force of the heat-sealed part may be insufficient). On the other hand, in the case where the roller length L of the heat seal rollers 70 and 80 is 1500 mm, if the pressing force at the time of thermocompression is set to a value exceeding 8 atm, excessive pressure is applied to the heat fusion portion of the laminated paper 10X before heat fusion. In addition, there is a possibility that the heat-sealed portion is cured at the time of bonding.

[Temperature control of heat seal roller]
In the laminated paper manufacturing apparatus, heat is reliably applied to the crepe paper as the outer layer sheet and the intermediate layer sheet (nonwoven fabric, non-permeable sheet, etc.) at the heat fusion part of the laminated paper 10X before heat fusion. The temperature at the time of thermocompression bonding of the seal rollers 70 and 80 (hereinafter referred to as “thermocompression temperature”) is set within a range of 175 to 200 ° C., and the temperature distribution is the length direction of the heat seal rollers 70 and 80. It is preferable to control the temperature so as to be constant throughout. When the thermocompression bonding temperature of the heat seal rollers 70 and 80 is 175 ° C. or less, the crepe paper and the nonwoven fabric cannot be reliably bonded by heat fusion at the heat fusion portion of the laminated paper 10X before heat fusion, On the other hand, when the thermocompression bonding temperature is 200 ° C. or higher, the heat adhesion resin (PP (polypropylene), PE (polyethylene), etc.) of the intermediate layer sheet is cured and deteriorated, or the intermediate layer sheet itself such as a nonwoven fabric is cured, resulting in heat. There is a possibility that the fusible fiber material (thermally fusible synthetic resin fiber) does not exhibit the fusing function (that is, it becomes impossible to bond the crepe paper by fusing). Further, as shown in FIG. 15A, the thermocompression bonding temperature of the heat seal rollers 70, 80 is the rotational speed of the heat seal rollers 70, 80 (that is, the supply speed of the laminated paper 10X before heat sealing, in other words, It is preferable to perform temperature control and rotation control of the heat seal rollers 70 and 80 in the laminated paper manufacturing apparatus so as to increase or decrease in proportion to the formation speed in the length direction of the heat fusion part.

[Rotation control of heat seal roller]
In the laminated paper manufacturing apparatus, heat is reliably applied to the crepe paper as the outer layer sheet and the intermediate layer sheet (nonwoven fabric, non-permeable sheet, etc.) at the heat fusion part of the laminated paper 10X before heat fusion. After the seal rollers 70 and 80 reach the thermocompression bonding temperature within the above setting range, the heat seal rollers 70 and 80 are started to rotate, and the formation of the heat fusion portion of the laminated paper 10X before heat fusion is executed. To do. Further, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is controlled to be constant within the above-mentioned setting range, but the rotation speed of the heat seal rollers 70 and 80 depends on the thickness of the laminated paper raw sheet (that is, lamination before heat fusion). It is preferable to control by increasing / decreasing according to the thickness of the paper 10X. That is, as shown in FIG. 15C, the rotational speed of the heat seal rollers 70 and 80 is increased and decreased in proportion to the thickness (base paper thickness) of the pre-heat-bonded laminated paper 10X. It is preferable to perform rotation control 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 (feed speed of the base paper) of the heat seal rollers 70 and 80 is increased or decreased according to the base paper thickness. Similarly, as shown in FIG. 15D, the rotation speed of the heat seal rollers 70 and 80 is laminated so as to increase or decrease in proportion to the thickness (nonwoven fabric thickness) of the nonwoven fabric raw sheet of the laminated paper 10X before heat sealing. The rotation control of the heat seal rollers 70 and 80 can also be performed by a paper manufacturing apparatus. Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is kept constant, and the rotational speed (feed speed of the base paper) of the heat seal rollers 70 and 80 is increased or decreased according to the nonwoven fabric thickness. Further, as shown in FIG. 15 (b), the thermocompression bonding temperature of the heat seal rollers 70 and 80 is increased or decreased in proportion to the thickness (nonwoven fabric thickness) of the nonwoven fabric of the laminated paper 10X before heat sealing. It is also possible to control the temperature of the heat seal rollers 70 and 80 in the manufacturing apparatus. Also in this case, the rotational speed of the heat seal rollers 70 and 80 is kept constant, and the thermocompression bonding temperature of the heat seal rollers 70 and 80 is changed according to the thickness of the nonwoven fabric. Here, it is preferable that the thermocompression-bonding speed (the length of the heat-bonded portion row formed on the pre-heat-bonded laminated paper 10X per unit time) by the heat seal roller is, for example, 20 m / min.

[Uniform temperature control]
As described above, the laminated paper manufacturing apparatus controls the thermocompression bonding temperature of the heat seal rollers 70 and 80 so as to obtain a uniform temperature distribution over the entire heat seal rollers 70 and 80, and at the heat fusion part. However, the structure shown in FIG. 12 can be adopted as a structure for controlling the temperature. Specifically, as shown in FIG. 11, each of the heat seal rollers 70 and 80 has a cylindrical shape in which both ends are 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 and 80S of the heat seal rollers 70 and 80 are sealed spaces maintained in a vacuum state. The laminated paper manufacturing apparatus connects the external water supply means to the internal spaces 70S and 80S of the heat seal rollers 70 and 80, respectively, and the internal space 70S of the heat seal rollers 70 and 80 from the water supply means, Water is supplied to 80S, respectively, and when the heat seal rollers 70 and 80 are heated, the temperature of the heat seal rollers 70 and 80 is maintained constant by using water vapor obtained by heating the water. It has become. For example, the laminated paper manufacturing apparatus stores a predetermined amount of water in the internal spaces 70S and 80S of the heat seal rollers 70 and 80 in advance, and heats the water when the heat seal rollers 70 and 80 are heated. The obtained steam is used to keep the temperature of the heat seal rollers 70, 80 constant, or when the heat seal rollers 70, 80 are operated, saturated steam or superheated steam is supplied to the internal spaces 70S, 80S. The steam is used to maintain the temperature of the heat seal rollers 70 and 80 constant. In this case, high-temperature steam (for example, saturated steam) is attached to the inner surfaces of the heat seal rollers 70 and 80 so as to form a thin layer or film, and the entire heat seal rollers 70 and 80 are covered with the layer or film steam. It is designed to maintain a uniform temperature. Then, the laminated paper manufacturing apparatus heats the heat seal rollers 70 and 80 by a predetermined heating means before the heat press operation by the heat seal rollers 70 and 80 is started, and the temperature rises to the thermo press temperature. For example, in the laminated paper manufacturing apparatus, an induction coil is wound around the heat seal rollers 70 and 80 and an alternating current is output to the induction coil to induce and generate eddy currents 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 the predetermined temperature is controlled to be kept constant. Then, in addition to the induction heating by the induction heating means, the heat sealing rollers 70 and 80 are moved over the entire circumferential direction and the entire length direction (in particular, all The predetermined thermocompression bonding temperature is controlled so as to be maintained uniformly and evenly (over the entire thermocompression bonding surfaces 72a and 82a of the thermocompression protrusions 72 and 82). Thereby, the temperature distribution of the thermocompression bonding surfaces 72a and 82a of the thermocompression-bonding convex portions 72 and 83 of the heat seal rollers 70 and 80 is maintained absolutely the same (uniform). In addition, it is preferable that the heating means (heater heater) of the heat seal rollers 70 and 80 has an electric configuration as described above (for example, an induction heating type configuration such as the induction heating unit). In this way, it is possible to avoid the risk of oil leakage as in the case where the heating means is an oil heater type, and in addition to the oil heater type, the temperature distribution of the heat seal rollers 70 and 80 also by the heating means itself. Can contribute to the stabilization of.

  Further, the laminated paper manufacturing apparatus applies the pressing force at the time of thermocompression bonding of the heat seal rollers 70, 80, particularly between the thermocompression bonding surface 72 a of the thermocompression protrusion 72 and the thermocompression bonding surface 82 a of the thermocompression protrusion 82. It is controlled to be constant over the entire facing surface. Thus, it is preferable that the laminated paper manufacturing apparatus simultaneously controls the temperature distribution of the heat seal rollers 70 and 80 and the control of the pressure distribution. 11 can be eliminated as much as possible.

[Method of manufacturing laminated paper]
It is preferable that the laminated paper of the present invention, including the invention of the laminated paper 10 of Embodiments 1 to 3 described above, is produced by the laminated paper production method described below. In addition, the laminated paper manufacturing apparatus of Embodiment 5 can be suitably used for this laminated paper manufacturing method.

Embodiment 6 (another example of a laminated paper manufacturing apparatus)
In the laminated paper manufacturing apparatus of the fifth embodiment, a pair of heat seal rollers 70 and 80 are used as means for forming the heat-sealing portion row 11 of the laminated paper 10 (hereinafter referred to as “heat-sealing means”). However, in addition to this configuration, the crepe paper may be formed by high frequency welding or ultrasonic welding as a heat fusion means for forming the heat fusion portion array 11 of the laminated paper 10. The structure which adhere | attaches with intermediate | middle layer sheets, such as a nonwoven fabric (by the melt | fusion operation | movement of the heat-fusion component of an intermediate | middle layer sheet), is employable. According to these heat fusion means using high frequency welding or ultrasonic welding, the adhesive temperature can be easily adjusted by heat fusion, there are a variety of materials, and a low-melting thermoplastic resin film sheet is inexpensive. New materials may be available. For example, the laminated paper manufacturing apparatus shown in FIG. 16 is provided with a high frequency sewing machine as a high frequency welding means in the heat fusion 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. The configuration is the same as that of the laminated paper manufacturing apparatus of the fifth embodiment, and a three-layer structure (a structure of three sheets) in which a nonwoven fabric 2 is interposed between a pair of crepe papers 1 is laminated before heat fusion. The paper 10X is guided and fed to the high-frequency sewing machine 100 by the guide rollers 61 and 62, and the high-temperature sewing machine 100 forms the heat-sealed portion row 11 at a predetermined position of the laminated sheet 10 between heat-fusions, and then heats the paper 10X. After fusing, the laminated paper 10 </ b> Y is guided by the guide rollers 63 and 64 and wound around the winding roller 55.

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

  The laminated paper of the present invention can be suitably applied to the use of a paper towel product, and the laminated paper manufacturing method and the laminated paper manufacturing apparatus can be applied in the case of a paper towel product. It can be applied to paper towel products such as Kannon Fold, but besides this, roll base paper can be commercialized as it is and used for base paper of automatic paper towel making machines. In addition to products, it can also be applied to hygiene products used for nursing and nursing purposes.

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 points 11b, 12b, 41b, 42b, 51b, 61b, 82b: non-fused portion 30: second heat seal roller (heat seal roller)
31: 1st heat seal part (heat seal part)
32: 2nd heat seal part (heat seal part)
31a, 32a: pressing protrusion, 31b, 32b: non-pressing part

Claims (9)

Crepe paper as a pair of outer layer sheets;
It consists of 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 to form a laminated structure by a linear heat-sealing part array extending in a direction orthogonal to the direction in which the crepe bottle of the crepe paper extends,
A printing section is provided on the inner surface of the intermediate layer sheet or the crepe paper,
Laminated paper, wherein the thickness of the crepe paper is set 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. The intermediate layer sheet is made of a non-woven fabric of a material that can be printed by the printing portion, and a material that can be bonded by heat-sealing the crepe paper as the outer layer sheet in the heat-sealing portion row,
The laminated paper according to claim 1, wherein the printing unit is provided on a surface of the nonwoven fabric facing one crepe paper as the outer layer sheet.   The laminated paper according to claim 1, wherein the printing unit is provided on an inner surface of one of the crepe papers as the outer layer sheet. The intermediate layer sheet comprises a non-permeable sheet made of a synthetic resin that blocks permeation of moisture and / or oil.
The laminated paper according to claim 1, wherein the printing unit is provided on a non-permeable sheet as the intermediate layer sheet. The nonwoven fabric, basis weight, laminated paper according to claim 2, characterized in that it has a thickness in the range of 15-25 g / m ^2. The laminated paper according to any one of claims 1 to 5, wherein the crepe paper has a thickness within a range of ^{20 to} 50 g / m2. The width-wise heat fusion part interval, which is the distance between the width direction center lines of the adjacent heat fusion part rows, is set to an arbitrary value within a predetermined range corresponding to the range of the crepe rate of the crepe paper. ,
When the crepe rate of the crepe paper is in the range of 20% to 26%, the interval between the heat fusion portions in the width direction is set in 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 width of the heat fusion part in the width direction is set in the range of 15 to 25 mm. The laminated paper according to any one of the above. A method for producing a laminated paper according to claim 1,
The intermediate layer sheet is made of nonwoven fabric,
In order to compensate for the shrinkage at the time of printing of the printing part to the nonwoven fabric raw material sheet to be the raw material sheet of the nonwoven fabric, according to the shrinkage rate, a width having a size larger by a predetermined ratio than the width of the laminated paper to be actually obtained. A method for producing a laminated paper, comprising using a non-woven fabric raw material sheet. An apparatus for producing laminated paper according to claim 1,
A first heat sealing roller and a second heat sealing roller forming a pair for forming the heat fusion portion row;
The first heat seal roller has a convex thermocompression-bonding convex portion corresponding to the heat-sealing portion, and a peripheral surface of the thermocompression-bonding convex portion is a thermocompression bonding surface,
The second heat seal roller has a ridge-like thermocompression-bonding convex portion opposed to the thermocompression-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding convex portion is the first heat. With the thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
The width of the thermocompression-bonding surface of the thermocompression-bonding convex portion of the second heat-sealing roller is set to a width larger than the width of the thermocompression-bonding surface of the thermocompression-bonding convex portion of the first heat-sealing roller by a certain dimension. A laminated paper manufacturing apparatus characterized by the above.

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