JP2021191430A - Manufacturing apparatus of laminate sheet, and manufacturing method of laminate sheet - Google Patents

Abstract

To provide paper hand-towel, a paper hand-towel product and a sanitary article using laminate paper which has a function with a high added value, and is largely improved in performance more than a conventional one.SOLUTION: The paper hand-towel comprises laminate paper. The laminate paper includes a pair of crepe paper as outer layer sheets, and a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet to make a laminate structure by heat-sealing the crepe paper to the intermediate layer sheet by heat-sealing means, and forming linear heat-sealable part rows extending in a direction orthogonal to a direction in which crepe wrinkles of the crepe paper stretch.SELECTED DRAWING: Figure 16

Description

The present invention relates to a paper towel, a paper towel product, and a sanitary product using laminated paper that can be used for paper towels, hand towels, body wipes, paper towels, and the like.

As inventions relating to laminated paper that can be used for conventional paper towels and the like, there are an invention according to Patent Document 1 according to the invention or invention of the present inventor and an invention according to Patent Document 2. In these inventions, a moisture-absorbing paper having a crepe and a heat-sealing sheet (a moisture-absorbing paper or a non-woven fabric mixed with synthetic fibers) are laminated, and a heat set portion or a heat is formed so as to extend in a direction substantially orthogonal to the crepe of the moisture-absorbing paper. Sealed parts are formed, and they are heat-sealed and integrated. These inventions can provide a laminated paper which is soft to the touch and has excellent appearance and usability, and can heat-seal the laminated paper at a low temperature, which facilitates processing and reduces manufacturing costs. Can be reduced.

Further, as the invention of the present inventor who further improved the conventional laminated paper having the above-mentioned excellent effect, there are the invention described in Patent Document 3 and the invention described in Patent Document 4. In particular, these inventions provide a laminated paper in which the fusion strength of the heat-sealed portion of the crepe paper and the heat-sealing sheet is significantly improved, and the overall volume feeling is increased to further improve the appearance. be able to. That is, the laminated paper according to these inventions can obtain sufficient fusion strength even if the fusion area is reduced, and the overall volume feeling can be increased.

Special Fair 4-24480 Gazette Jitsufuku 4-15116 Gazette Japanese Unexamined Patent Publication No. 11-34209 Japanese Unexamined Patent Publication No. 2003-39581

In each of the inventions of Patent Documents 1 to 4, when the laminated paper is embodied in a paper towel or the like, the texture, appearance and usability of the laminated paper can be significantly improved, and the laminated paper is configured. The effect of the function is mainly exhibited, that is, the fusion strength between the moisture-absorbing paper and the heat-sealing sheet can be greatly improved, and the overall volume feeling can be greatly increased. It brings great advantages as a product. On the other hand, the present inventor imparts a higher value-added function to the conventional laminated paper in the process of processing the laminated paper as a material into a final product such as a paper towel, or in the stage after processing. In addition, we searched for a new laminated paper and its manufacturing method that can dramatically improve the performance as a laminated paper. The present inventor has developed a laminated paper having such high value-added functions and dramatically improved performance as compared with the conventional case, a manufacturing method for manufacturing 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, the present invention provides a laminated paper manufacturing apparatus capable of manufacturing laminated paper having high value-added functions and dramatically improved performance as compared with the conventional case, and a method for manufacturing laminated paper. The subject is the provision of paper towels, paper towel products, and sanitary goods using the laminated paper.

The paper squeeze according to the first aspect of the present invention is a paper squeeze formed by impregnating the laminated paper, and the laminated paper is laminated between the crepe paper as a pair of outer layer sheets and the pair of crepe paper. The crepe paper is composed of a non-woven fabric as a heat-sealing intermediate layer sheet disposed in the state, and the crepe paper is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. The intermediate layer sheet is heat-sealed to form a laminated structure, and the crepe ratio of the crepe paper is set within the range of 20% to 30%, and the heat in the width direction of the heat-sealed portion row is set. The space between the fused portions is set within the range of 10 mm to 25 mm, and within the range of the heat fused portion interval in the width direction, the heat fused portion in the width direction is proportional to the increase in the crepe rate of the crepe paper. Increase the interval.

The paper squeeze according to the second aspect of the present invention is a paper squeeze formed by impregnating the laminated paper, and the laminated paper is laminated between the crepe paper as a pair of outer layer sheets and the pair of crepe paper. The crepe paper is composed of a non-woven fabric as a heat-sealing intermediate layer sheet disposed in the state, and the crepe paper is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealed portion in the width direction of the heat-sealed portion row is formed by heat-sealing to the intermediate layer sheet. The spacing is set within the range of 10 mm to 15 mm, and when the crepe ratio of the crepe paper is within the range of 26% to 30%, the heat-sealed portion spacing in the width direction of the heat-sealed section row is 15 to 5- It is set within a range of 25 mm, and within the range of the heat-sealed portion spacing in the width direction, the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

The paper squeezing according to the third aspect of the present invention is a paper squeezing made by impregnating a laminated paper with water and imparting a function, and the laminated paper is a crepe paper as a pair of outer layer sheets and the pair of crepes. It consists of a non-woven fabric as a heat-sealing intermediate layer sheet disposed between papers in a laminated state, and is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of crepe wrinkles of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and the crepe rate of the crepe paper is set within the range of 20% to 30%, and the heat-sealing section row. The heat-sealed portion spacing in the width direction is set within the range of 10 mm to 25 mm, and within the range of the heat-sealed portion spacing in the width direction, the width direction is proportional to the increase in the crepe ratio of the crepe paper. Increase the distance between the heat-sealed parts of the paper.

The paper squeezing according to the fourth aspect of the present invention is a paper squeezing made by impregnating a laminated paper with water and imparting a function, and the laminated paper is a crepe paper as a pair of outer layer sheets and the pair of crepes. It consists of a non-woven fabric as a heat-sealing intermediate layer sheet disposed between papers in a laminated state, and is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of crepe wrinkles of the crepe paper. , The crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and when the crepe ratio of the crepe paper is within the range of 20% to 26%, the width direction of the heat-sealed portion row. The heat-sealed portion spacing is set in the range of 10 mm to 15 mm, and when the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealed portion in the width direction of the heat-sealed portion row is set. The spacing is set within the range of 15 to 25 mm, and the spacing between the heat-sealed portions in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the heat-sealed portion spacing in the width direction. do.

The paper squeezing product according to the fifth aspect of the present invention is a paper squeezing product obtained by impregnating a laminated paper with water, and the laminated paper is between a pair of crepe papers as an outer layer sheet and the pair of crepe papers. The crepe is composed of a non-woven fabric as a heat-sealing intermediate layer sheet disposed in a laminated state, and is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. The paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and the crepe ratio of the crepe paper is set within the range of 20% to 30%, and the width direction of the heat-sealed portion row is set. The heat-fused portion spacing of the above is set within the range of 10 mm to 25 mm, and within the range of the heat-fused portion spacing in the width direction, the heat fusion in the width direction is proportional to the increase in the crepe ratio of the crepe paper. Increase the contact interval.

The paper squeezing product according to the sixth aspect of the present invention is a paper squeezing product obtained by impregnating a laminated paper with water, and the laminated paper is between a pair of crepe papers as an outer layer sheet and the pair of crepe papers. The crepe is composed of a non-woven fabric as a heat-sealing intermediate layer sheet disposed in a laminated state, and is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. The paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and when the crepe ratio of the crepe paper is within the range of 20% to 26%, heat fusion in the width direction of the heat-sealed section row is performed. The bonding portion spacing is set within the range of 10 mm to 15 mm, and when the crepe ratio of the crepe paper is within the range of 26% to 30%, the heat-sealed portion spacing in the width direction of the heat-sealed portion row is set. It is set within the range of 15 to 25 mm, and the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction.

The sanitary goods according to the seventh aspect of the present invention are sanitary goods obtained by impregnating laminated paper with water, and the laminated paper is laminated between a pair of crepe papers as an outer layer sheet and the pair of crepe papers. The crepe paper is composed of a non-woven fabric as a heat-sealing intermediate layer sheet disposed in the state, and the crepe paper is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. The intermediate layer sheet is heat-sealed to form a laminated structure, and the crepe ratio of the crepe paper is set within the range of 20% to 30%, and the heat in the width direction of the heat-sealed portion row is set. The space between the fused portions is set within the range of 10 mm to 25 mm, and within the range of the heat fused portion interval in the width direction, the heat fused portion in the width direction is proportional to the increase in the crepe ratio of the crepe paper. Increase the interval.

The sanitary goods according to the eighth aspect of the present invention are sanitary goods obtained by impregnating laminated paper with water, and the laminated paper is laminated between a pair of crepe papers as an outer layer sheet and the pair of crepe papers. The crepe paper is composed of a non-woven fabric as a heat-sealing intermediate layer sheet disposed in a state, and the crepe paper is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. It is heat-sealed to the intermediate layer sheet to form a laminated structure.
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 10 mm to 15 mm, and the crepe of the crepe paper is set. When the ratio is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set within the range of 15 to 25 mm, and the heat-sealing portion spacing in the width direction is set. Within the range, the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

The paper squeezing product according to the ninth aspect of the present invention is a paper squeezing product obtained by impregnating laminated paper with water and imparting a function, and the laminated paper is a pair of crepe paper as an outer layer sheet and the pair. It is composed of a non-woven fabric as a heat-bondable intermediate layer sheet arranged in a laminated state between the crepe papers of the above, and is a linear heat-sealed portion extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by rows to form a laminated structure, and the crepe ratio of the crepe paper is set within the range of 20% to 30%, and the heat fusion is performed. The heat-sealed portion spacing in the width direction of the section row is set within the range of 10 mm to 25 mm, and the heat-sealed portion spacing in the width direction is proportional to the increase in the crepe rate of the crepe paper. Increase the spacing between heat-sealed parts in the width direction.

The paper squeezing product according to the tenth aspect of the present invention is a paper squeezing product obtained by impregnating laminated paper with water and imparting a function, and the laminated paper is a pair of crepe paper as an outer layer sheet and the pair. It is composed of a non-woven fabric as a heat-bondable intermediate layer sheet arranged in a laminated state between the crepe papers of the above, and is a linear heat-sealed portion extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. Depending on the row, the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and when the crepe ratio of the crepe paper is within the range of 20% to 26%, the heat-sealed portion row The heat-fused portion spacing in the width direction is set within the range of 10 mm to 15 mm, and when the crepe ratio of the crepe paper is within the range of 26% to 30%, the heat-fused portion row in the width direction is heat-fused. The attachment portion spacing is set within the range of 15 to 25 mm, and within the width direction heat fusion portion spacing, the width direction heat fusion portion spacing is proportional to the increase in the crepe rate of the crepe paper. To increase.

The sanitary goods according to the eleventh aspect of the present invention are sanitary goods obtained by impregnating laminated paper with water and imparting a function, and the laminated paper includes a pair of crepe papers as an outer layer sheet and the pair of crepes. It consists of a non-woven fabric as a heat-sealing intermediate layer sheet disposed between papers in a laminated state, and is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of crepe wrinkles of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and the crepe ratio of the crepe paper is set within the range of 20% to 30%, and the heat-sealing section row. The widthwise heat-sealed portion spacing is set within the range of 10 mm to 25 mm, and within the widthwise heat-sealed portion spacing, the width direction is proportional to the increase in the crepe ratio of the crepe paper. Increase the distance between the heat-sealed parts of the paper.

The sanitary goods according to the twelfth aspect of the present invention are sanitary goods obtained by impregnating laminated paper with water and imparting a function, and the laminated paper includes a pair of crepe papers as an outer layer sheet and the pair of crepes. It consists of a non-woven fabric as a heat-sealing intermediate layer sheet disposed between papers in a laminated state, and is formed by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of crepe wrinkles of the crepe paper. , The crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure.
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 10 mm to 15 mm, and the crepe of the crepe paper is set. When the ratio is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set within the range of 15 to 25 mm, and the heat-sealing portion spacing in the width direction is set. Within the range, the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

According to the laminated paper, the method for producing the laminated paper, and the apparatus for producing the laminated paper of the present invention, it is possible to provide a laminated paper having high value-added functions and dramatically improved performance as compared with the conventional case. can.

FIG. 1 is a plan view showing a first specific example (laminated paper having a pattern portion) of the laminated paper (laminated paper having a printed portion) according to the first embodiment of the present invention. FIG. 2 is a plan view showing an enlarged view of the laminated paper according to the first embodiment of the present invention at a portion cut out along the line AA of FIG. 1, and FIG. 2A is a drying of the laminated paper according to the first embodiment. The state is shown, and (b) shows the swelling state at the time of water content of the laminated paper which concerns on Embodiment 1. FIG. 3 is a plan view showing a second specific example (laminated paper having an advertising unit) of the laminated paper according to the first embodiment of the present invention. FIG. 4 is a side view showing the laminated paper according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view showing the laminated paper according to the first embodiment of the present invention cut in the horizontal direction, and shows an enlarged portion of a portion where a printing layer is provided in a circle of an alternate long and short dash line. FIG. 6 is a cross-sectional view showing a laminated paper (laminated paper having a printed portion) according to the second embodiment of the present invention cut in the horizontal direction, and a circular portion (a portion provided with a printed layer) shown by a alternate long and short dash line is shown. Enlarged and shown. FIG. 7 is an enlarged cross-sectional view showing a laminated paper (laminated paper having a plurality of layers of intermediate layer sheets) according to the third embodiment of the present invention cut in the lateral direction. FIG. 8 is an enlarged cross-sectional view showing a laminated paper (laminated paper having a non-permeable intermediate layer sheet) according to the fourth embodiment of the present invention cut in the lateral direction. FIG. 9 is a side view schematically showing a laminated paper manufacturing apparatus (heat seal roller type laminated paper manufacturing apparatus) according to the fifth embodiment of the present invention. FIG. 10 is a side view schematically showing a heat seal roller of the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention, and the circular portion shown by the alternate long and short dash line is enlarged for explaining the linear thermocompression bonding convex portion. Shown. FIG. 11 is an explanatory diagram for explaining a process of forming a linear heat-sealed portion in the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention, and is an explanatory view showing a heat seal roller portion from a side view. .. FIG. 12 is an explanatory diagram for explaining a process of forming a linear heat-sealed portion in the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention, and the heat seal roller corresponding to FIG. 11 is cut at an end face. It is explanatory drawing which shows the internal structure with a cross section. FIG. 13 is an explanatory view showing a configuration of a linear heat-bonding convex portion of the heat-sealing roller of the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention, and the upper figure shows a part of a pair of heat-sealing rollers. It is a perspective view which shows, and the central figure is a circular part shown by the alternate long and short dash line in the upper figure in order to explain the state where the linear heat crimping convex portions of a pair of heat seal rollers mesh with each other and press the raw material sheet of laminated paper. It is a cross-sectional view shown as a cross section after enlarging, and the lower figure is a circular portion shown by a dotted chain line on the center side of the central figure in order to explain the shape of the linear thermal pressure-bonding convex portion of the pair of heat seal rollers. Is an enlarged cross-sectional view. FIG. 14 shows an example in which the width between the linear heat-sealed portions is changed according to the crepe ratio in the laminated paper according to the first embodiment of the present invention, and FIG. 14A corresponds to the first crepe ratio. It is an enlarged plan view of a part of the laminated paper which shows the case where the space (width) between adjacent linear heat fusion portions is set as the first width, and (b) corresponds to the second crepe ratio. It is an enlarged plan view of a part of the laminated paper which shows the case where the space (width) between adjacent linear heat-sealing portions is set as a 2nd width. FIG. 15 is a graph for explaining a suitable specific example of a method for manufacturing a laminated paper using the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention, and FIG. 15A is a graph for explaining a preferred specific example of the laminated paper manufacturing apparatus. Explanatory drawing showing the relationship between the feeding speed of the raw paper sheet and the heat-bonding temperature of the heat-sealing roller of the laminated paper manufacturing equipment, (b) the heat-bonding temperature of the heat-sealing roller of the laminated paper manufacturing equipment and laminating. An explanatory diagram showing the relationship between the thickness of the base paper of the raw paper sheet (base paper thickness), (c) shows the feeding speed of the raw material sheet of the laminated paper by the laminated paper manufacturing apparatus and the base paper thickness of the raw material sheet of the laminated paper. An explanatory diagram showing the relationship between the two and (d) is an explanatory diagram showing the relationship between the heat pressure bonding temperature of the heat seal roller of the laminated paper manufacturing apparatus and the thickness of the non-woven fabric (non-woven fabric thickness) of the raw material sheet of the laminated paper. Is. FIG. 16 is a side view schematically showing a laminated paper manufacturing apparatus (high frequency sewing machine type laminated paper manufacturing apparatus) according to the sixth embodiment of the present invention.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described. Throughout each embodiment, the same members, elements or parts are designated by the same reference numerals, and the description thereof will be omitted.

Embodiment 1 (laminated paper having a printed portion provided on a non-woven fabric)
[Overall composition of laminated paper]
As shown in FIGS. 1 to 5, the laminated paper of the first embodiment is embodied in the laminated paper 10 having a printing portion. First, the overall configuration of the laminated paper 10 will be described. As shown in FIG. 1, in a plan view (or bottom view) of the laminated paper 10, the laminated paper 10 has a predetermined outer contour (typically, a rectangular shape or the like). It is formed in the shape of a sheet having a rectangular shape). On the other hand, in the side view (or cross-sectional view) of the laminated paper 10, as shown in the side view of FIG. 4, the laminated paper 10 has the crepe paper 1 as an outer layer sheet constituting the pair of outer layers and the pair of outer layers. It has a laminated structure composed of a non-woven fabric 2 as an intermediate layer sheet constituting an intermediate layer interposed therebetween. Further, the laminated paper 10 maintains the laminated structure by heat-sealing one and the other of the pair of crepe papers 1 to one surface and the other surface of the nonwoven fabric 2 at the same location, respectively. .. That is, the laminated paper 10 has a first heat-sealing portion 11a and a second heat-sealing portion 11a and a second heat-sealing portion row 11 (a first heat-sealing portion row 11A and a second heat-sealing portion row 11B), respectively. The pair of crepe papers 1 are heat-sealed to the non-woven fabric 2 at each location of the heat-sealing portion 11b, so that the pair of crepe paper 1 is heat-sealed to the non-woven fabric 2 at the same location.

[Heat fusion part]
The heat-sealed portion 11 will be described in detail. In the laminated paper 10, the heat-sealed portion row 11 having a broken line shape is arranged in the length direction of the laminated paper 10 (the base paper supply direction at the time of manufacture, and is shown in FIG. 1). It is formed so as to extend in the entire direction (vertical direction) to form one row of heat-sealed portions (11 rows). Further, in the laminated paper 10, the width direction of the laminated paper 10 (the direction orthogonal to the base paper supply direction at the time of manufacture) is such that the heat-sealed portion rows 11 of a large number of rows are parallel to each other at regular intervals. They are arranged side by side continuously over the entire area (in the left-right direction in FIG. 1). As a result, the laminated paper 10 has non-fused portions 12 forming a straight strip shape between adjacent heat-fused portions rows 11. That is, in the laminated paper 10, a large number of rows of non-fused portions 12 are continuously arranged side by side over the entire width direction so as to be parallel to each other at regular intervals. In the laminated paper 10, the multi-row heat-sealed portion row 11 is a first row formed by arranging the first heat-sealed portions 11a linearly at regular intervals in the length direction of the laminated paper 10. The heat-sealed portion row 11A of the second row and the second row of the heat-sealed portion 11B in which the second heat-sealed portion 11b is linearly arranged at regular intervals in the length direction of the laminated paper 10. It is composed of. That is, the heat-sealed portion row 11A of the first row composed of the first heat-sealed portion 11a and the heat-sealed portion row 11B of the second row composed of the second heat-sealed portion 11b are laminated. They are arranged side by side alternately at regular intervals in the width direction of the paper 10. Further, as shown in FIG. 2, the first heat-sealed portion 11a constitutes, in the laminated paper 10, a straight line segment-shaped fused portion having a predetermined length and a predetermined width, and is such a constant. By linearly arranging the first heat-sealing portions 11a having a length and a constant width at regular intervals in the length direction, the heat-sealing portion rows 11A of the first row having a broken line shape are formed. The second heat-sealed portion 11b constitutes a linear line segment-shaped fused portion having the same length and the same width as the first heat-sealed portion 11a, and has such a constant length and a constant width. By arranging the second heat-sealing portions 11b linearly at regular intervals in the length direction, the heat-sealing of the second row having the same broken line shape as the heat-sealing portion rows 11A of the first row. The section 11B is configured. Then, the first heat-sealing portion 11a of the heat-sealing portion row 11A in the first row and the second heat-sealing portion 11b of the heat-sealing portion row 11B in the second row are (that is, adjacent to each other). The heat fusion section 11A, 11B in the row is the center position in the length direction of the first heat fusion section 11a of the heat fusion section 11A in the first row, and the heat fusion in the second row. The laminated papers 10 are arranged so as to be offset from each other in the length direction so as to be in the middle position of the gap between the adjacent second heat-sealed portions 11b of the bonded portion row 11B.

[Non-fused part]
As shown in FIG. 4, the laminated paper 10 forms a non-fused portion 12 forming a straight strip between two adjacent rows of heat-fused portions 11, and the non-fused portion 12 is formed. Is designed to expand after water 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 expanding portion 12a (which will form a wide expanding portion after the water content of the laminated paper 10) and a wide expanding portion 12a (of the laminated paper 10). It is composed of a narrow expansion portion 12b (which will form a narrow expansion portion after water content). More specifically, the wide expansion portions 12a are provided in a range (non-overlapping range) in which the heat-sealed portion rows 11A of the adjacent first row and the heat-fused portion rows 11B of the second row do not overlap, respectively. 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 is the first heat-sealing portion 11a of the heat-sealing portion row 11A in the first row in the second row from the left, and the second row in the third row from the left. The second heat-sealing portion 11b of the heat-sealing portion row 11B of the first row is vertically adjacent to each other in the heat-sealing portion row 11A of the first row within the range of the intermediate portion in the length direction that does not overlap with each other. Within the length range between the ends of the first heat-sealed portion 11a (between one end and the other end), and the heat of the second row from the right edge of the heat-fused portion row 11A of the first row. The left edge of the heat-sealed portion row 11A of another first row facing each other across the fused portion row 11B (in the case of FIG. 2, the heat-sealed portion row 11A of the first row in the fourth row from the left). It is provided in a substantially rectangular shape over the width range up to. On the other hand, the narrow expansion portion 12b has an overlapping range within a range (overlapping range) in which the heat-sealing portion row 11A of the adjacent first row and the heat-sealing portion row 11A of the second row overlap each other. The laminated paper 10 is provided as a small substantially rectangular portion having the length of the overlap and the width of the overlapping range. For example, in FIG. 2, the narrow expansion portion 12b has a first heat fusion portion 11a in the heat fusion portion row 11A in the first row in the second row from the left and a second heat fusion portion 11a in the third row from the left. The first heat fusion of the first row heat fusion section 11A within the range of the lengthwise ends where the second heat fusion section 11b of the row heat fusion section 11B overlaps with each other. Within the length range from one end (for example, the upper end) of the portion 11a to the other end (lower end) of the second heat-sealing portion 11b of the heat-sealing portion row 11B of the second row adjacent thereto. It is provided in a substantially rectangular shape over a width range from the right edge of the heat fusion section 11A in the first row to the left edge of the heat fusion section 11B in the second row.

[Wrinkles in the non-fused part (expanded part)]
In the laminated paper 10, the non-woven fabric 1 of the outer layer and the non-woven fabric 2 of the intermediate layer are not bonded at all in the non-fused portion 12, and the non-woven fabric 12 of the crepe paper 1 is the heat-sealed portion row 11. As a portion that is not constrained by the heat-sealed portions 11a and 11b (that is, a portion that is not fixed to the nonwoven fabric 2), it moves in the thickness direction or the like with respect to the nonwoven fabric 2 and is freely 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 the portion of the non-fused portion 12 where the amount of separation from the heat-fused portion row 11 is large (that is, the central portion between the adjacent heat-fused portion rows 11), the movable amount of the crepe paper 1 is relatively large. It becomes larger and the movable amount of the crepe paper 1 is maximized at the central position between the adjacent heat-sealed portion rows 11. Further, in the laminated paper 10, each of the non-fused portions 12 (that is, each wide expanding portion 12a and each narrow expanding portion 12b) of the crepe paper 1 which is both outer layers is before the first water content of the laminated paper 10. A large number of crepe wrinkles, which are the original peculiar fine wrinkles of the crepe paper 1, appear in. The crepe wrinkles are small wrinkles extending in the width direction of the laminated paper 10 (and the width direction of the crepe paper 1), and are formed at the time of manufacturing the crepe paper 1.

On the other hand, after the laminated paper 10 is initially impregnated with water, in each of the non-fused portions 12 (wide expansion portion 12a and narrow expansion portion 12b) of the crepe paper 1, the crepe paper 1 passes through the crepe wrinkles. By expanding, that is, by expanding the crepe wrinkles, which are small wrinkles, with water, as shown in FIG. 2, wrinkles different from the original crepe wrinkles of the crepe paper 1 (wrinkles having a larger size than the crepe wrinkles). , Hereinafter referred to as "expansion wrinkles") are formed. In this case, in the crepe paper 1, a plurality of adjacent crepe wrinkles are expanded and integrated by moisture, and one expanded wrinkle corresponding to the plurality of crepe wrinkles is formed, and in the expanded wrinkle portion, the expanded wrinkles of the expanded wrinkles are formed. The original crepe wrinkles can be considered to disappear in whole or in part. Further, the expansion wrinkles of the crepe paper 1 become large wrinkles (hereinafter referred to as "expansion large wrinkles") extending substantially in the width direction of the wide expansion portion 12a in the wide expansion portion 12a, and the narrow expansion portion. In 12b, wrinkles having an intermediate size extending substantially in the entire width direction of the narrow expansion portion 12b (hereinafter referred to as “expansion middle wrinkles”) are formed, and both the expansion large wrinkles and the expansion middle wrinkles are formed from the crepe wrinkles. Will be a big wrinkle. Note that FIG. 14 shows an example of these expanding large wrinkles 12aw and expanding medium wrinkles 12bw. Further, in the non-fused portion 12 of the crepe paper 1, not all the crepe wrinkles are transformed into the expanded large wrinkles or the expanding middle wrinkles, and some of the crepe wrinkles are creped as they are (in the original state of fine wrinkles). Remains on paper 1. In addition, the present inventor has come up with the idea that in the laminated paper 10, in the non-fused portion 12 of the crepe paper 1, there are two types of expanded wrinkles in the expanded wrinkles of the wide expanded portion 12a. That is, the present inventor presents the first type of expanded wrinkles (that is, mixed) in which some of the crepe wrinkles remain (that is, mixed) together with the expanded large wrinkles without disappearing as the expanded large wrinkles (hereinafter, "" It has been found that there are two types of expanded wrinkles (hereinafter referred to as "completely large wrinkles") in which the crepe wrinkles have completely disappeared. Similarly, the present inventor has come up with the idea that in the laminated paper 10, in the non-fused portion 12 of the crepe paper 1, there are two types of expanding wrinkles in the expanding wrinkles of the narrow expansion portion 12b. That is, the present inventor presents the first type of expanding wrinkles (that is, mixed) in which some of the crepe wrinkles remain (that is, mixed) together with the expanding wrinkles without disappearing as the expanding wrinkles (hereinafter, "" It has been found that there are two types of expanded wrinkles (hereinafter referred to as "completely medium wrinkles") in which crepe wrinkles have completely disappeared (referred to as "small and medium mixed wrinkles"). Furthermore, in the laminated paper 10, in the crepe paper 1, these expanded large wrinkles, expanded medium wrinkles, large and small mixed wrinkles, small and medium mixed wrinkles, complete large wrinkles, and complete medium wrinkles were such that the laminated paper 10 was dried after being water-containing. Even after that, it basically remains as it is.

As a result, in the laminated paper 10 after the water content, the expanded large wrinkles, the expanded medium wrinkles, the large and small mixed wrinkles, the medium and small mixed wrinkles, the complete large wrinkles, and the complete medium wrinkles occur in both the water-containing and the dried after the water-containing. The wide expansion wrinkles, the large and small mixed wrinkles, and the complete large wrinkles, and the expansion middle wrinkles, the small and medium mixed wrinkles, and the complete middle wrinkles are mixed in the wide expansion portion 12a and the narrow expansion portion 12b. They are present alternately and exert a unique effect of increasing the volume feeling in a well-balanced manner over the entire sides of the laminated paper 10.

[Dimensions of heat-sealed parts and spacing between heat-sealed parts]
In the laminated paper 10, in the heat-sealed portion row 11 of each row, the first heat-sealed portion 11a having a fixed length and a fixed width in a straight line segment shape is arranged in a broken line shape at regular intervals in the length direction. The second heat-sealed portion 11b, which is a straight line segment having a constant length and a constant width, is displaced from the first heat-sealed portion 11a (that is, each second). (So that the intermediate position of the heat-sealed portion 11b of 2 coincides with the intermediate position of the interval between the first heat-sealed portions 11a) Has been done. Further, since the length and width of the first heat-sealing portion 11a and the second heat-sealing portion 11b are set to be the same, the first heat-sealing portion 11a and the second heat-sealing portion 11a and the second heat-sealing portion 11a are set to be the same. The portions 11b have the same configuration except that they are arranged so as to be displaced in the length direction as described above. On the other hand, in the laminated paper 10, the length and width of the first heat-sealing portion 11a and the second heat-sealing portion 11b are set to a predetermined length and a predetermined width. That is, the length and / or width of each of the first heat-sealed portions 11a and each second heat-sealed portion 11b is appropriately set according to the external dimensions and the like of one sheet when the laminated paper 10 is used. (That is, it is appropriately set according to the vertical dimension, the horizontal dimension, etc. determined according to the use of the laminated paper 10.).

Specifically, for example, when the laminated paper 10 is used for a paper towel, the lengths of the heat-sealed portions 11a and 11b are set to arbitrary values within the range of 35 mm to 45 mm, and preferably. It is set to an arbitrary value in the range of 38 mm to 42 mm, and more preferably set to a value of about 40 mm. Further, the widths of the heat-sealed portions 11a and 11b are set to arbitrary values within the range of 1.5 mm to 2.5 mm, and preferably set to a value of about 2 mm. The length-width ratio (aspect ratio) of the heat-sealed portions 11a and 11b is preferably set to an arbitrary ratio within the range of 13: 1 to 23: 1, and is set to about 20: 1. Is even more preferable. That is, it is preferable that the width of each of the heat-sealed portions 11a and 11b is set to about 5% of the length (or the length is set to about 20 times the width). Further, in the heat-sealed portions 11 of each row of the laminated paper 10, the distance between the heat-sealed parts 11A and 11b adjacent to each other in the length direction (hereinafter, referred to as “heat-fused part spacing in the length direction”) is. , Any value within the range of 18 mm to 22 mm, preferably about 20 mm. The ratio of the lengths of the heat-sealed portions 11a and 11b to the heat-sealed portion spacing is preferably set to 2: 1. That is, the heat-sealed portions 11 in each row set the distance between the heat-sealed portions in the length direction to about 50% of the lengths of the heat-sealed portions 11a and 11b (or the heat-sealed portions 11a and 11b of the heat-sealed portions 11a and 11b. It is preferable to set the length to about twice the distance between the heat-sealed portions). By doing so, the integral bonding force between the crepe paper 1 and the nonwoven fabric 2 by the heat-sealed portion row 11 is maintained satisfactorily, while the expansion coefficient of the crepe 1 by the non-fused portion 12 is maximized, and the laminated paper 10 is used. The volume feeling of the paper can be maintained in the best condition.

[End shape of heat-sealed part]
Further, each of the heat-sealed portions 11a and 11b has a curved shape in a plane semicircle at both ends in the length direction. As a result, the crepe paper 1 has the ends of the heat-sealed portions 11a and 11b as compared with the case where the end portion of each heat-sealed portion is rectangular (that is, the corner angle of the end portion is a right-angled corner angle). It is possible to effectively prevent the non-woven fabric 2 from peeling from the portion. Further, as will be described later, in this case, both ends of the heat-bonded convex portion of the heat-sealed roller constituting the heat-sealed portion forming means in the laminated paper manufacturing apparatus in the length direction are also corresponding plane halves. Due to the circular curved shape, the heat generated by the heat-bonded surface of the heat seal roller is higher than the case where the end of each heat-bonded surface is rectangular (that is, the corner of the end is a right-angled corner). The raw material sheet of crepe paper 1 that receives the pressing force from the heat-bonded surface when forming the fused portion is not damaged by excessive pressure concentration at the end of the heat-bonded surface, improving the manufacturing yield. Or, the quality of the laminated paper 10 can be improved. (That is, as will be described later, when the end of the thermocompression bonding surface has a right-angled angle, stress is applied to the raw material sheet of the crepe paper 1 at that angle as compared with the case where the thermocompression bonding surface has a curved shape. Concentrate and increase the possibility that the raw material sheet will be damaged at the corners.)

[Crepe rate of crepe paper]
In the laminated paper 10, the crepe ratio of the crepe paper 1 is set to an arbitrary value in the range of 20% to 40%, and preferably set to an arbitrary value in the range of 20% to 30%. More preferably, it is set to a value of about 30%. That is, when the crepe ratio of the crepe paper 1 is smaller than 20%, the crepe paper 1 does not sufficiently expand or swell when the laminated paper 10 is impregnated with water after being laminated and bonded to the nonwoven fabric 2 to form the laminated paper 10. There is a great possibility. On the other hand, if the crepe ratio of the crepe 1 is larger than 40%, it becomes difficult to make the raw material sheet with a paper machine at the time of manufacturing the raw material sheet of the crepe paper 1 (that is, at the time of paper making).

[Crepe ratio of crepe paper and arrangement interval of heat-sealed parts]
Further, as shown in FIG. 14, in the laminated paper 10, the arrangement intervals LW1 and LW2 of the heat-sealed portion rows 11 (that is, the intervals between the widthwise center lines of the adjacent heat-sealed portion rows 11), hereinafter, “width”. The heat-sealed portion interval in the direction ") is set to an arbitrary value within a predetermined range according to the range of the crepe ratio of the crepe paper 1. Specifically, when the crepe ratio of the crepe paper 1 is in the range of 20% to 26%, the heat-sealed portion spacing in the width direction is the first width direction (which is relatively small). The heat-sealed portion spacing LW1 is preferably set to an arbitrary value within the range of 10 mm to 15 mm (that is, the lower limit value is preferably 10 mm and the upper limit value is preferably 15 mm), and in this width direction. Within the range of the heat-sealed portion spacing, it is preferable to increase the heat-sealed portion spacing in the width direction in proportion to the increase in the crepe ratio. Further, when the crepe ratio of the crepe paper 1 is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction is the second heat-sealing in the width direction (which has a relatively large size). It is preferable to set the part spacing LW2 to an arbitrary value within the 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), and heat fusion in the width direction is preferable. Within the range of the section spacing, it is preferable to increase the heat fusion section spacing in the width direction in proportion to the increase in the crepe rate. If the heat-sealed portion intervals LW1 and LW2 in the width direction of the laminated paper 10 are smaller than the lower limit, it is highly possible that the crepe paper 1 does not sufficiently expand or swell when the laminated paper 10 is impregnated with water. On the other hand, when the heat-sealed portion intervals LW1 and LW2 in the width direction of the laminated paper 10 are larger than the upper limit values, the expanded large wrinkles, the expanded middle wrinkles, and the like are larger than the desired expansion rate when the laminated paper 10 is water-containing. There is a risk that the quality of the laminated paper 10 will be deteriorated due to excessive expansion or expansion, which may cause slack in the expanded large wrinkles, the expanding wrinkles, and the like. For example, in the laminated paper 10, if the heat-sealed portion spacing LW1 and LW2 in the width direction are set to 30 mm or more (that is, a value significantly exceeding 25 mm, specifically, a value of 125% or more of 25 mm), the laminated paper The present inventor has confirmed by experiments that the expanded large wrinkles, the expanding wrinkles, and the like become slackened due to excessive expansion or expansion when the water is contained in 10. That is, even if the crepe ratio of the crepe paper 1 is 30%, which is the maximum value in the above range, if the heat-sealed portion spacing LW1 and LW2 in the width direction of the laminated paper 10 are set to a value of 30 mm or more, the laminated paper 10 is formed. When it contains water, the expanded large wrinkles, the expanding middle wrinkles, and the like expand or expand too much and become loose.

[Pattern part as a 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 portion. Specifically, the pattern portion 13 may be configured such that, for example, as shown in FIG. 2, unit patterns 13a and 13b having the same motif are arranged on the entire surface of the laminated paper 10 or over a certain range. In FIG. 2, for example, the unit pattern 13a constitutes a pattern of a predetermined size with a motif of a corolla (a collection of petals) of a predetermined type, while the unit pattern 13b has the same corolla as the unit pattern 13a. The motif constitutes a pattern with a size larger than the unit pattern 13a. The configuration of the pattern portion 13 is not limited to that of FIG. 2, and any pattern can be used. That is, the pattern portion 13 can use a unit pattern of a motif different from the unit patterns 13a and 13b of FIG. 2, and can also use unit patterns of various motifs other than those using the unit pattern of the same motif. It can be any combination of patterns. Alternatively, the pattern portion 13 may be configured by using a pattern composed of repeated patterns such as a lattice pattern and a checkered pattern, in addition to the configuration using individual unit patterns as shown in FIG. Alternatively, the pattern portion 13 may be a single color pattern (whole surface single color pattern) obtained 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. It is also possible to obtain a monochromatic pattern (partially monochromatic pattern) obtained by printing an arbitrary single color different from the original base color of the laminated paper 10 on a part of the range of the laminated paper 10. Alternatively, the pattern portion 13 may be a pattern formed by randomly printing two or more different colors on the entire surface or a part of the laminated paper 10 (hereinafter, referred to as "multicolor pattern"). .. In short, the pattern portion 13 has an arbitrary configuration as long as it 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. Can be.

[Advertising department as a printing department]
Further, 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, the advertising unit 14 may have, for example, a configuration having an advertising space 14b and an advertising space 14c in the inner range of the outer frame 14a. In this case, the advertising unit 14 prints, for example, a title or a copy of a specific advertising content on the advertising space 14b, and prints details of the advertising content (product description, a pattern corresponding to the product, etc.) on the advertising space 14c. It can be configured as such. In FIG. 3, the outer frame 14a, the advertising space 14b, and the advertising space 14c of the advertising unit 14 have outlines drawn by broken lines, respectively, but these are only the outer frame 14a, the advertising space 14b, and the like. And, it is a convenience for explaining the range of the advertising space 14c, and usually (of course, it is possible to draw them intentionally), the outer frame 14a, the advertising space 14b, and the advertising space are on the laminated paper 10. The outline of 14c is not drawn. Further, the outer frame 14a of the advertisement unit 14 is also provided for convenience to show an example of the advertisement content, and all of them can be embodied as advertisement frames 14a and 14b without providing the outer frame 14a. Further, the number of advertising slots 14a and 14b may be set to one, or may be any number of two or more slots. Further, the configuration of the advertising unit 14 is not limited to that of FIG. 2, and may be any configuration. That is, the advertising unit 14 is configured as if the advertising content is printed on an advertising printing medium such as an ordinary leaflet or a promotional item, and the advertising content or content is printed in any expression mode or format. be able to. Further, as the content or content to be printed on the advertising unit 14, any one such as a company name, a logo mark, and a brand can be printed. Further, the laminated paper 10 provided with a printing unit can be used as novelty goods such as paper towels distributed in large quantities for the purpose of announcing or advertising various information such as sale information of retail stores and campaign information of companies. It can also be applied to novelty goods such as paper towels that are distributed in large quantities for the purpose of announcing or disseminating various events (events) such as the Olympics and expositions.

[Structure of printing section]
Next, the structure of the printed portion of the laminated paper 10 will be described. As shown in the specific examples of FIGS. 5, 6, 7, and 8, the laminated paper 10 is a surface other than the outer surface of the crepe paper 1 as an outer layer sheet and is arranged inside the laminated paper 10. One of the main features is that the printed portion is printed on the surface using a predetermined printing ink. In addition to this, in the laminated paper 10, the printed portion penetrates the crepe paper 1 of the outer layer sheet of the laminated paper 10 and is visually recognized from the outside even when the laminated paper 10 is dried, and when the laminated paper 10 contains water. Of the crepe paper 1 as the outer layer sheet, at least the outer layer on the side where the printing part is provided so that the transparency of the printing part from the crepe 1 as the outer layer sheet increases and the visibility from the outside increases. Another major feature is that the thickness (basis weight) of the crepe paper 1 as a sheet is set, and the material (paper quality) is set together with the thickness as needed. Specifically, in the first embodiment, the laminated paper 10 is composed of a pair of crepe paper 1 as an outer layer and one or more non-woven fabrics 2 arranged in a laminated state between the pair of crepe paper 1. It has a laminated structure of a plurality of layers (a plurality of layers of three or more layers), and 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 heat-sealed and pressure-bonded to the nonwoven fabric 2 by the heat-sealing portion 1 to bond the crepe paper 1.

[Printing section provided on non-woven fabric]
For example, as shown in FIG. 5, the printing unit is composed of a printing layer 2a provided on one surface (one side surface in the thickness direction) of the nonwoven fabric 2 as an intermediate layer sheet. That is, the nonwoven fabric 2 of the laminated paper 10 is configured as an intermediate layer sheet whose printing portion is made of a printable material, and a predetermined printing ink is used on one surface of the nonwoven fabric 2 to form a desired pattern portion 13 or an advertising portion. A printing unit is configured by providing the 14 by printing. In FIG. 5, the print layer 2a is drawn as a thin layer on one surface of the non-woven fabric 2 for convenience of explanation, but in reality, the printing ink constituting the print layer 2a is drawn at the time of printing. In order to permeate the inside of the non-woven fabric 2 from one side of the non-woven fabric 2 to form a predetermined pattern of the printing portion, the printing ink completely permeates the inside of the non-woven fabric 2 for printing on one side of the non-woven fabric 2. In some cases, a layer made of ink is not formed, or in some cases, a part of printing ink permeates the inside of the non-woven fabric 2 while a layer made of the remaining printing ink is formed on one surface of the non-woven fabric 2. Further, after the printing ink has completely penetrated into the inside of the nonwoven fabric 2, it may be exposed from the other surface of the nonwoven fabric 2 to form a layer of the printing ink on the other surface of the nonwoven fabric 2. In any case, the printed portion of the laminated paper 10 is drawn with the highest density on one surface of the nonwoven fabric 2 serving as 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 are one of the nonwoven fabrics 2 by any printing method using any printing ink according to the composition of the pattern, the advertisement content, and the like. It is provided by printing on the surface of.

[Structure of print layer (printing ink and printing method)]
Here, the print layer 2a of the printing portion of the laminated paper 10 is formed on one surface of the non-woven fabric 2 by any printing method using an arbitrary printing ink, and the printing portion is preferably printed. As a method, a printing unit formed by using a flexo printing technique is used, and a printing unit formed by using a water-based ink or a UV (ultraviolet curable) ink as a printing ink is used. Specifically, flexo printing is a type of direct transfer type letterpress printing, which uses rubber or synthetic resin as the plate material, and liquid ink consisting of water-based ink or UV ink as the printing ink. However, the print layer 2a of the printing part of the laminated paper 10 is printed by printing a predetermined pattern part 13 or an advertising part 14 on one surface of the non-woven fabric 2 after adjusting the density of the water-based ink or the UV ink. It constitutes a part. The laminated paper 10 is formed by interposing the nonwoven fabric 2 having the printed portion between the pair of crepe papers 1 and heat-sealing them to each other by the heat-sealing portion row 11 to integrate them. There is. The laminated paper 10 is desired as a printing part by a plate having elasticity and shape followability of flexographic printing even when the printing target of the printing part is a non-woven fabric 2 having a fine uneven surface. The pattern portion 13 and the advertisement portion 14 of the above can be clearly printed. As a result, in the laminated paper 10 manufactured by using the non-woven fabric 2 having the printed portion, the printed portion is visually recognized from the outside with good print quality through the crepe paper 1, especially in the wet state thereof. Further, in the laminated paper 10, since the printing ink in the printing portion of the nonwoven fabric 2 is composed of water-based ink or UV ink, the printing ink does not contain an organic solvent. As a result, the laminated paper 10 manufactured by using the non-woven fabric 2 having the printing portion is not affected by the volatilization of the organic solvent unlike the printing ink using the organic solvent, and in particular, the hygiene such as paper towels. When applied to products, it becomes a product that is friendly to users and the environment. In printing the laminated paper 10 on the nonwoven fabric 2, for example, a flexographic printing machine capable of printing up to 7 colors is used, and the density of the printing ink of each color is adjusted.

[Non-woven fabric material]
On the other hand, in the laminated paper 10 according to the first embodiment shown in FIG. 5, the non-woven fabric 2 as the intermediate layer sheet is made of a material capable of printing the printed portion, and the crepe paper as the outer layer sheet is heated in a linear manner. The non-woven fabric is made of a material that can be reliably heat-sealed and adhered at the fused portion. As a result, one side of the laminated paper 10 (typically, when the laminated paper 10 is applied to the paper squeeze, one side of the exposed laminated paper on the outer surface side of the paper squeeze, that is, the paper squeeze A pattern portion 13 and an advertising portion 14 can be provided by printing on one surface of the nonwoven fabric 2 to be arranged on the surface side), and a pair of outer layers of crepe paper 1 can be provided on both sides of the nonwoven fabric 2. Can be adhered to to form a laminated paper 10 having a multi-layer structure (three-layer structure in the case of FIG. 5).

[Thickness of non-woven fabric]
Further, in the laminated paper 10, as described above, the nonwoven fabric 2 as the intermediate layer sheet has both the printability that enables printing on the printed portion and the heat fusion property that enables heat fusion of crepe paper. Although it is necessary to use a provided material, it is preferable to use a non-woven fabric having an arbitrary thickness within a predetermined range in order to have both printability and heat-sealing properties. Specifically, for example, the conventional non-woven fabric paper towel uses a non-woven fabric in the form of a sheet having a basis weight of 45 to 70 g / cm2 as a raw material sheet. On the other hand, in the laminated paper 10 of the present embodiment, in addition to using a pair of crepe paper 1 and a non-woven fabric 2 as raw material sheets, the laminated paper 10 has an arbitrary value within the range ^{of a basis weight of 15 to 25 g / m 2 as the non-woven 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 , and most preferably 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 of 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 touch feeling to the user of the laminated paper 10. Further, if 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 an unnecessary increase in cost. Further, during the manufacturing process of the laminated paper 10, for example, in the step of heat-sealing the crepe paper 1 to the non-woven fabric 2 by a pair of heat-sealing rollers, the non-woven fabric 2 is passed from the heat-sealing roller having a heating source to the non-woven fabric 2 via one of the crepe papers 1. When heat is transferred to the non-woven fabric 2, the heat transfer efficiency decreases as the thickness of the non-woven fabric 2 increases, so that heat fusion between one surface of the crepe paper 1 and the non-woven fabric 2 can be satisfactorily performed. However, the heat fusion between the other crepe paper 1 and the other surface of the non-woven fabric may not be sufficiently performed, and the adhesive force of the non-woven 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 contained in the nonwoven fabric 2 for developing the heat-sealing force is relatively reduced, and both sides of the nonwoven fabric 2 are both sides. When the crepe paper 1 is heat-sealed, a sufficient heat-sealing force may not be obtained, and the overall stiffness of the laminated paper 10 becomes weak. For example, the laminated paper 10 is applied to a paper towel or the like. At that time, the feeling of use of the laminated paper 10 may be adversely affected.

[Non-woven fabric raw material fiber]
Further, in the case of the nonwoven fabric 2, when the thickness is set to a value within the above-mentioned predetermined range in order to have the above-mentioned printability and heat-sealing property, the thickness is particularly set to the value on the lower limit value side within the above-mentioned predetermined range. (For example, when the thickness is ^{a value such as a basis weight of 15 g / m 2 or} a basis weight of 18 g / m ² ), it is preferable to use a non-woven fabric made of a core-sheath structure composite fiber. That is, when the thickness of the nonwoven fabric 2 is relatively small (that is, when the value is on the lower limit side within the above predetermined range), the nonwoven fabric having such a relatively small thickness is the entire laminated paper 10. However, by using a non-woven fabric made of a core-sheath structure composite fiber, when the crepe paper 1 is heat-sealed to the non-woven fabric 2, the sheath portion of the core-sheath structure composite fiber is predetermined. While softening or melting at the heating temperature of No. 1 to develop adhesive force by heat fusion to the crepe paper 1, the core portion of the core-sheath structure composite fiber remains as it is without softening or melting, and the non-woven fabric 2 In order to maintain the strength and elasticity of the laminated paper 10, the strength and elasticity of the entire laminated paper 10 can be finally maintained, and the volume of the laminated paper 10 can be maintained by the thin non-woven 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 (transparency). Specifically, one crepe paper 1 to be overlapped and bonded to one surface of the non-woven fabric 2 (that is, the surface on the side where the printing portion is provided) is a non-woven fabric via the crepe paper 1 in a dry state of the laminated paper 10. The transmission rate is such that at least a part of the printed portion of the non-woven fabric 2 is visible (or the transmission rate is such that at least a part of the printed portion of the non-woven fabric 2 is visible in a translucent state), and at least. In a wet state due to the water content of the laminated paper 10, the entire printed portion of the non-woven fabric 2 can be visually recognized in a clear state through the crepe paper 1 (or the entire printed portion of the non-woven fabric 2 can be visually recognized in a substantially transparent state. The thickness is set so that the transparency is such that. On the other hand, the other crepe paper 1 to be overlapped and bonded to the other surface of the nonwoven fabric 2 is usually set to the same thickness as the one crepe paper 1, but may be set to a different thickness. Even when the thickness of the other crepe paper 1 is the same as that of the one crepe paper 1, if the thickness of the non-woven fabric 2 is within the above-mentioned 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 printed portion of 2 is still visible (although it is less sharp than the side of one crepe paper 1), and in a wet state due to the water content of the laminated paper 10, the other crepe paper 1 is used. The entire printed portion of the non-woven fabric 2 is visually recognized in a somewhat clear state (although the sharpness is lower than that of the one side of the 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 laminated paper 10 is in a dry state and is not visible through the crepe paper 1 regardless of whether it is visually recognized from the side of one crepe paper 1 or from the side of the other crepe paper. At least a part of the printed portion of the non-woven fabric 2 can be visually recognized, and the entire printed portion of the non-woven fabric 2 is visually recognized in a more or less clear state through the crepe paper 1 in a wet state due to the water content of the laminated paper 10. The peculiar effect of crepe is exhibited.

Specifically, in the laminated paper 10, the thickness of the crepe paper 1 is set to an arbitrary value within the range of ^{20 to} 50 g / m 2 in terms of basis weight, and more preferably within the range of ^{20 to 40 g / m 2.} It is set to any value, more preferably, is set to any value within the range of 30 to 40 g / ^{m 2,} even more preferably, is set to any value within the range of 30~35g / ^{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} It is set to a value of 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 intensive studies on the relationship between the crepe wrinkles of the crepe paper 1 and the thickness of the crepe paper 1, the present inventor is required to use the crepe paper 1 of the laminated paper 10 when the thickness of the crepe paper 1 is out of 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 terms of basis weight, when the crepe paper 1 is manufactured using the crepe paper manufacturing apparatus, the raw material sheet of the crepe paper 1 (the crepe is not formed). It was found that crepes could not be formed on the raw material sheet when the feeding rate of the state paper sheet) was increased. On the other hand, when the thickness of the crepe paper 1 ^{exceeds 50 g / m 2 in} terms of basis weight, the crepe paper 1 is laminated on the non-woven fabric 2 in order to form the laminated paper 10, and the heat-sealed portion 11 heats the non-woven fabric 2. When attempting to fuse, the heat from the crimping surface of the heat seal roller is blocked by the thick crepe paper 1 and does not sufficiently reach the nonwoven fabric 2, and the thermoplastic resin as the adhesive of the nonwoven fabric 2 is formed. There is a possibility that the crepe paper 1 cannot be sufficiently melted, the desired adhesive force to the crepe paper 1 cannot be exhibited, and the crepe paper 1 cannot be adhered to the non-woven fabric 2.

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

[Overall thickness of laminated paper (total thickness of crepe paper and non-woven fabric)]
As described above, the crepe paper 1 and the nonwoven fabric 2 which are the constituent elements of the laminated paper 10 are each configured to have a thickness of an arbitrary value within a predetermined range, and the total thickness of the laminated paper 10 is the crepe paper. Although it is determined by the thickness of 1 and the thickness of the nonwoven fabric 2, preferably, the total thickness of the laminated paper 10 is 35 g / m ^{2 in} terms of the thickness of each crepe paper 1 and the thickness of the nonwoven fabric 2 in terms of 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 non-woven 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, at the time of manufacturing the laminated paper 10, the raw material sheet of the laminated paper 10 (that is, the raw material sheet formed by interposing one non-woven fabric raw material sheet between a pair of crepe paper raw material sheets) is cut at a predetermined feeding position. (That is, when the raw material sheet of the laminated paper 10 is cut to a predetermined length according to the purpose of use), the cutting can be performed best, the manufacturing efficiency can be improved, and the yield can be improved. ..

[Effect of laminated paper with printed part]
As described above, the laminated paper 10 provided with the printing portion exhibits a unique design effect because the printing portions such as the pattern portion 13 and the advertising portion 14 have an appearance and appearance as if they are half-embossed through the crepe paper 1. can do. Specifically, in the dry state of the laminated paper 10, the transmission rate (transparency) of the dried crepe paper 1 is relatively low, so that the patterns and advertisements on the printed portion are in an unclear state through the crepe paper 1. However, although it is in a visible state to some extent, in a wet state due to the water content of the laminated paper 10, the permeability (transparency) of the wet crepe paper 1 is relatively high, so that the pattern of the printed portion is printed. And advertisements are visually recognized in a clear state through the crepe paper 1, and the presence of the crepe paper 1 exerts a unique effect of being visually recognized as if they were raised from the laminated paper 10.

[Effect of printed part when provided on non-woven fabric]
Further, as described above, since the laminated paper 10 is configured as described above, it can be provided with a printing unit on which a pattern portion 13 and an advertising portion 14 which have not been conventionally printed are printed. Therefore, as compared with, for example, a conventional color paper towel (a paper towel whose entire surface is colored with a single color), which is simply colored on the raw material fibers (pulp, etc.) of the hand towel raw material sheet, the laminated paper 10 is printed. The pattern part 13 and the advertising part 14 as a part make the product 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 viewer gives a soft impression when the pattern or advertisement of the printing portion is visually recognized from the outside. And exerts a unique visual effect. In particular, when the laminated paper 10 is applied to sanitary paper products such as paper towels, which is the main use, the laminated paper 10 as sanitary paper products is usually provided to the user after being moistened with water and wetted. The laminated paper 10 in the state allows the user to wipe off dirt and the like on a part of the hand or body. In this case, it is necessary to prevent the printing ink in the printing portion of the laminated paper 10 from being dissolved by moisture and being eluted from the crepe paper 1 to the outside so as not to adhere to the user's hand or body. However, in the conventional color paper hand towel, the entire surface is colored with a predetermined single color printing ink, so that the printing ink is exposed on the surface of the color paper hand towel. Therefore, in the conventional color paper squeezing, it is necessary to use an organic solvent type printing ink so that the printing ink exposed on the surface does not dissolve and come into contact with the user's hands or skin in a wet state due to water content. Yes, as mentioned above, the influence of the volatile components of the organic solvent cannot be denied.

On the other hand, in the laminated paper 10 of the present embodiment, as described above, the printed portion is formed on the non-woven fabric 2 by using water-based ink or UV ink by using flexographic printing, and both sides of the non-woven fabric 2 are formed of the crepe paper 1. Since the printing ink is completely covered, the printing ink in the printing section is not directly exposed on the surface of the laminated paper 10, and the state of being shielded by the crepe paper 1 is always maintained. Therefore, the laminated paper 10 has a structure 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 when it contains water, even though the laminated paper 10 is provided with a printing portion. It 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 an organic solvent type printing ink like a conventional color paper towel. Has the advantage of not having. The water-based ink as the printing ink for the printing portion of the laminated paper 10 is preferably a pigment-type water-based ink, whereby the printing portion of the non-woven fabric 2 is printed in a wet state when the laminated paper 10 contains water. It is possible to effectively prevent the ink from being easily dissolved and eluted to the outside.

[Manufacturing method of laminated paper having a printed portion (width dimension of non-woven fabric raw material sheet)]
Next, a method of manufacturing the laminated paper 10 having a printing portion will be described. In general, a non-woven fabric is produced from a predetermined raw material 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 to produce a web (also called a fleece). The web fibers are bonded to each other by a predetermined bonding method such as a chemical bond method, a thermal bond method, a needle punch method, or a water flow entanglement method. On the other hand, in the laminated paper 10 of the present embodiment, it is preferable to use the nonwoven fabric made of the core-sheath structure composite fiber as the nonwoven fabric 2, but further, the nonwoven fabric 2 is the 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) produced by bonding the fibers together. This air-through nonwoven fabric has advantages such as excellent extensibility and flexibility, giving the user a soft feel and having a good feel to the touch, and after heat-sealing the crepe paper 1 as the nonwoven fabric 2, the crepe paper 1 Also when mentioned above, it enables the development of good adhesive force. Further, the details will be described in the section of the laminated paper manufacturing apparatus and the laminated paper manufacturing method described later, but in the manufacturing of the laminated paper 10, the raw material sheet of the pair of crepe paper 1 (hereinafter, “crepe paper raw material sheet””. The raw material sheet of the non-woven fabric 2 (hereinafter referred to as "non-woven raw material sheet") is sandwiched between the raw material sheets (hereinafter referred to as "laminated raw material sheet") having a three-layer structure (three-layered). Then, the laminated raw material sheet is fed between, for example, a pair of heat seal rollers, and the pair of crepe paper raw material sheets are heat-sealed and integrated with the non-woven fabric raw material sheets by the pair of heat seal rollers. Manufactures 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 as a predetermined width. In particular, if the widthwise dimension of the nonwoven fabric raw material sheet is smaller than the widthwise dimension of the crepe paper raw material sheet, there may be a portion where the creped paper raw material sheet cannot be heat-sealed to the nonwoven fabric raw material sheet at the widthwise end of the laminated raw material sheet. Therefore, it is not preferable that the widthwise dimension of the nonwoven fabric raw material sheet is smaller than the widthwise dimension of the crepe paper raw material sheet.

[Setting the width direction dimension of the non-woven fabric raw material sheet according to the material of the non-woven fabric]
On the other hand, as described above, when the nonwoven fabric 2 is provided with the printing section, the nonwoven fabric raw material sheet is supplied to a predetermined printing device in advance, and the predetermined printing section is printed on the raw material sheet. At this time, when the air-through non-woven fabric is used as the non-woven fabric, it is considered that the elasticity is large, but since it was found that the non-woven fabric raw material sheet shrinks due to the heat during printing, this influence is taken into consideration. As a result of diligent research on the invention of the laminated paper, we came up with the following structure. That is, when the printed portion is formed on the laminated paper 10, for example, when the printed portion is formed by using flexo printing, when the printed portion is printed on the non-woven fabric raw material sheet 2 having a width of 1200 mm, after printing, the non-woven fabric raw material sheet is printed. The width shrinks from 1200 mm to 1150 mm (ie, shrinks to about 96% of the original width), or otherwise the width of the non-woven fabric sheet shrinks from 1300 mm to 1200 mm (ie, the original). The present inventor has obtained the finding that it shrinks to a width of about 92% of the width). The present invention has also attempted to print the nonwoven fabric raw material sheet in a stretched state in the width direction (by the amount of shrinkage) in consideration of the shrinkage of the nonwoven fabric raw material sheet at the time of printing. We obtained the finding that it would be difficult to perform the desired printing. Therefore, in the method for manufacturing the laminated paper 10 having a printing portion, the width of the laminated paper 10 to be actually obtained is obtained according to the shrinkage rate in order to compensate for the shrinkage of the nonwoven fabric raw material sheet at the time of printing. A non-woven fabric raw material sheet having a width larger than that by a predetermined ratio is used (that is, the width dimension of the nonwoven fabric raw material sheet is set so as to be a width compensating for the shrinkage dimension according to the shrinkage rate).

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

[Peculiar effect of setting the width of the non-woven fabric raw material sheet]
According to the method for manufacturing laminated paper using a non-woven fabric raw material sheet in which the width direction dimension is set as described above (that is, the width direction dimension is set so as to compensate for the shrinkage rate of the non-woven fabric raw material sheet at the time of printing), the non-woven fabric is used. The width of the raw material sheet becomes the same 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 step 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 non-woven fabric raw material sheet is also about 1200 mm, which is the same width (that is, 50 mm smaller than the width before printing). The width is about 4% smaller than the width before printing). Therefore, the laminated paper raw material sheet having a three-layer structure formed by laminating the non-woven fabric raw material sheet (width about 1200 mm) after printing in the middle of the pair of crepe paper raw material sheets (width 1200 mm) is creped as a pair of outer layers. The paper raw material sheet and the non-woven fabric raw material sheet as the intermediate layer all have the same width, and can be smoothly provided as a laminated paper raw material sheet having a width of 1200 mm in the laminated paper manufacturing process. , It will have a width of 1200 mm, which is a desired width.

Embodiment 2 (laminated paper having a printing portion provided on crepe paper)
[Overall composition of laminated paper and composition 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 laminated structure of three sheets) composed of a pair of crepe paper 1 and one non-woven fabric 2. Further, the printed layer 2a of the printing portion is provided on the surface of the nonwoven fabric 2 as the intermediate layer sheet. However, as shown in FIG. 6, the three-layered laminated paper 10 of the second embodiment has an outer layer. The print layer 1a of the printing section is provided on the inner surface of the crepe paper 1 as a sheet. That is, in the second embodiment, the laminated paper 10 is a non-woven fabric as one or more intermediate layer sheets arranged in a laminated state between a pair of crepe papers 1 as an outer layer sheet and the pair of crepe papers 1. It has a multi-layer structure consisting of 2 (a multi-layer structure having three or more layers), and as an inner surface thereof (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 heat-sealed and pressure-bonded to the nonwoven fabric 2 by the heat-sealing portion 1 to bond the crepe paper 1. The inner surface of the crepe paper 1 is a laminated paper 10 having a laminated structure in which one (or two or more) non-woven fabrics 2 as an intermediate layer sheet are sandwiched between a pair of crepe papers 1 as an outer layer sheet and laminated. Refers to the surface that comes to the inside of the laminated structure of the laminated paper 10 (that is, the side facing the non-woven fabric 2) when the above is configured. Here, on both sides 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, that is, the surface feels good to the touch). Although it is composed of a back surface (which is a relatively rough surface and has a rough texture), in the laminated paper 10 of the second embodiment, the above-mentioned laminated structure is configured with the front surface side of the crepe paper 1 as the inner surface side. Is preferable.

[Peculiar effect 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 nonwoven fabric 1 is thermally fused to the nonwoven fabric 2 by the heat-sealing portion 1. The present inventor has confirmed by experiments that the crepe paper 1 is more reliably and firmly adhered to the nonwoven fabric 2 when it is fixed. In addition to this, when the print 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 print layer 1a (that is, printing with printing ink is performed) is formed. Since the surface has a high smoothness, the desired pattern portion 13 and the advertising portion 14 can be printed in a better state, and the print quality can be further improved. Further, in the second embodiment, since the printing portion is provided on the inner surface of the crepe paper 1, the printing portion does not come into contact with the user's fingers or skin (skin), and thus directly comes into contact with the printing ink. It is possible to eliminate the anxiety of the user and surely prevent health problems caused by the printing ink. When the printed portion is provided on the laminated paper 10, it is intermediate between the laminated paper 10 as in the first embodiment, rather than providing the printing portion on the crepe paper 1 which is the outer layer of the laminated paper 10 as in the second embodiment. It is preferable to provide a printing portion on the non-woven fabric 2 as a layer (that is, an inner layer) in terms of print quality.

[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 case of the first embodiment.

Embodiment 3 (laminated paper having a colored portion provided on an intermediate layer sheet)
[Overall composition of laminated paper and composition of non-transparent sheet as intermediate layer sheet]
As shown in FIG. 5, in the example of the first embodiment, the laminated paper 10 has a three-layer structure and has a configuration in which a printing portion is provided on the surface of the nonwoven fabric 2 as an intermediate layer sheet. As shown in the second embodiment, the laminated paper 10 has a three-layer structure and has a configuration in which a printing portion is provided on the inner surface of the crepe paper 1 as an outer layer sheet. As shown in FIG. 7, in the laminated paper 10 having a three-layer structure according to 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 print layer 5a of the printing section is provided on the surface of the non-transparent sheet 5. That is, in the third embodiment, the laminated paper 10 is opaque as a single intermediate layer sheet arranged in a laminated state between the pair of crepe papers 1 as an outer layer sheet and the pair of crepe papers 1. It has a multi-layer structure (three-layer structure) composed of a crepe sheet 5, and the printed portion is provided on the surface of the impermeable sheet 5 as an inner surface thereof (that is, as an inner surface of the laminated paper 10). The crepe paper 1 is heat-sealed and pressure-bonded to the impermeable sheet 5 by the heat-sealing portion 1. The non-permeable sheet 5 includes, for example, a vinyl sheet or a vinyl film, a resin film or a resin sheet made of a polyvinyl chloride resin, or a polyolefin resin (polyethylene resin, polypropylene resin, etc.). A resin film, a resin sheet, or the like can be preferably used. Further, the thickness of the impermeable sheet 5 is preferably a predetermined thickness in the range of, for example, 0.1 mm to 0.2 mm. The impermeable sheet as the impermeable sheet 5 has a main function of blocking the permeation of water, while the impermeable sheet is a non-permeable sheet that blocks the permeation of oil (hereinafter, "" It may be composed of "non-oil permeable sheet"). Further, in the document of the present application, the term "impermeable sheet" includes the impermeable sheet in addition to the impermeable sheet, and also blocks the permeation of other liquids and some gases. Including things. That is, in the present invention, the impermeable sheet may be a sheet or film made of synthetic resin that blocks the permeation of water and / or oil as the intermediate layer sheet.

[Peculiar effect of non-transparent sheet]
According to the laminated paper 10 of the third embodiment, the impermeable sheet 5 including the impermeable sheet and the non-oil permeable sheet as the intermediate layer sheet blocks the permeation of water and oil, so that the laminated paper 10 is used. In addition to typical products such as paper towels, it can be applied to wrapping paper for temporarily or long-term wrapping objects and articles with moisture or oil, and is widely used as a laminated paper 10. Can be expanded.

[Scope of Invention of Laminated Paper of Embodiments 1 to 3]
By the way, the invention of the laminated paper 10 of the first to third embodiments is characterized in that a printing portion is provided on the inner surface side (inner surface of the intermediate layer sheet or the outer layer sheet) of the laminated paper 10. That is, in the invention of the laminated paper 10 of the first to third embodiments, as long as such a printing portion is provided, the configuration other than the printing portion (the configuration of the heat-sealing portion and the like) is different from that of the above-described embodiment. 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 printed portion is provided on the inner surface side thereof, the configuration of the heat-sealing portion and the configuration of other elements or portions can be formed. It can have any configuration. For example, in the laminated paper provided with the printing portion of the present invention, in addition to the heat-sealed portion row having a broken line shape as in the first embodiment, the laminated paper has a wavy line shape, a dotted line shape, or one point having another configuration. It can 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 linear shape such as a zigzag shape or a zigzag shape, or it can be a straight line consisting of a solid line. Alternatively, it can be embodied in a laminated paper in which dot-shaped heat-sealed portions are scattered. However, in order to obtain a sufficient expansion effect over the entire laminated paper and give a voluminous feeling at the time of use after the laminated paper is moistened, the heat-sealed portion row has a broken line shape (or a chain line) as in the above embodiment. Shape) is preferably linear.

[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 have novelty and inventive step as seen from the prior art even by the configuration alone. That is, in addition to the invention of the laminated paper provided with the printing portion as described above (hereinafter referred to as "the invention of the first laminated paper"), the thickness of the non-woven fabric is set within the predetermined range, and the thickness of the crepe paper is set. The invention of the laminated paper having a thickness within the predetermined range (hereinafter referred to as “the invention of the second laminated paper”), and the heat-sealed portion spacing in the width direction according to the crepe rate of the crepe paper. The invention of the laminated paper within a predetermined range (hereinafter referred to as "the invention of the third laminated paper") is novel in view of the prior art, even in the invention itself (that is, even if it does not have a printing unit). It has progress.

[Invention of Second Laminated Paper (Thickness Range of Crepe Paper and Thickness Range of Nonwoven Fabric)]
Specifically, the invention of the second laminated paper comprises a crepe paper as a pair of outer layer sheets and a heat-sealing intermediate layer sheet disposed between the crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper to form a laminated structure. it has a thickness in the range of 20 to 50 g / ^{m 2,} and said non-woven fabric, basis weight, and having a thickness in the range of 15-25 g / ^{m 2.}

[Invention of a third laminated paper (crepe ratio of crepe paper and heat-sealed portion spacing in the width direction)]
Further, the invention of the third laminated paper comprises a crepe paper as a pair of outer layer sheets and a heat-sealing intermediate layer sheet disposed between the crepe papers in a laminated state, and the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles to form a laminated structure, and further, the adjacent heat-sealing section row. The widthwise heat-sealed portion spacing, which is the spacing between the widthwise center lines, is set to an arbitrary value within a predetermined range according to the range of the crepe rate of the crepe paper, and the crepe rate of the crepe paper is set. In the case of the range of 20% to 26%, the heat-sealed portion spacing in the width direction is set in the range of 10 mm to 15 mm, and when the crepe ratio of the crepe paper is in the range of 26% to 30%. The heat-sealed portion spacing in the width direction is set within a range of 15 to 25 mm.

Embodiment 4 (laminated paper having an improved non-woven fabric on an intermediate layer sheet)
[Construction of non-woven fabric]
The laminated paper of the present invention can be embodied as follows, assuming that the structure of the nonwoven fabric as the intermediate layer sheet is characteristic. Specifically, in the laminated paper of the fourth embodiment, the nonwoven fabric is made of a nonwoven fabric having a high stretch ratio, and specifically, as will be described later, is made of a nonwoven fabric manufactured by using so-called core-sheath structure fibers. That is, the conventional non-woven fabric is made of so-called pulp non-woven fabric, and is manufactured by accumulating fibrous substances obtained by crushing wood pulp in a web shape and joining them together to form a sheet-like portion. Further, the conventional paper towel is generally manufactured from a non-woven fabric, and the non-woven fabric used is a sheet having a basis weight of 45 to 70 g / cm 2.

[Type of non-woven fabric of the present invention (type according to manufacturing method)]
On the other hand, for example, to explain using the cross-sectional view of FIG. 5, the laminated paper 10 of the fourth embodiment uses an air-containing air-through type (manufactured by thermal bond) non-woven fabric as the intermediate layer sheet. can do. In this way, the laminated paper 10 has a structure that is thick as a whole but has a high elasticity, a good feel to the touch, and a heat-fusing structure. Further, the non-woven fabric of the laminated paper of the fourth embodiment is made of a non-woven fabric produced from a so-called core-sheath structure composite fiber as a raw material. This core-sheath composite fiber is a synthetic fiber of short fibers, and is a raw material for a non-woven fabric web (a fiber accumulation layer sometimes called a fleece) for producing PE / PP and PE / PET composite fibers by a dry method or the like. As a method for bonding the fibers to each other, the air-through method is used among the thermal bond methods (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 formed. It is adhered by melting the resin and adhering the fibers together). Further, this core-sheath structure fiber is a fiber in which the outer sheath is PE (polyethylene) and the inner (center) core is PET (polyethylene terephthalate). This non-woven fabric has a soft texture because no adhesive is used for interfiber bonding, but does not absorb water. Therefore, when the non-woven fabric 2 is provided with a printing portion as in the laminated paper 10 of the first to third embodiments. When the laminated paper 10 is impregnated with water, the non-woven fabric 2 does not supply water to the printing ink of the surface printing layer 2a due to the water content. Therefore, the laminated paper 10 exerts an additional unique effect that the print quality of the printed portion of the nonwoven fabric 2 can be well maintained. Further, in this non-woven fabric, the PE in the sheath portion is softened at a low temperature, and the crepe paper 1 can be satisfactorily adhered by the heat-sealing portion 11 of the laminated paper 10, while the PET in the core portion is the fiber itself. Maintain strength Maintain overall strength of the non-woven fabric. That is, in this non-woven fabric, the sheath portion of the core-sheath structure develops adhesive strength and functions as an adhesive to crepe paper, while the core portion contributes to maintaining strength.

As the material of the core-sheath structure fiber of this non-woven fabric, polyethylene (PE) has a melting point of about 120 ° C. (that is, a low density PE having a melting point of 95 to 130 ° C. or 114 to 126 ° C., and a melting point of 120 to 140 ° C. Alternatively, high-density PE of 126 to 137 ° C.) can be used, and low-density PE is usually used, but PE having a melting point of about 120 ° C. may be used. On the other hand, as polypropylene (PP), one having a melting point of about 140 ° C. (that is, 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 homo-PP for homopolymerization. Homo-PP has a melting point of 160 to 165 ° C., and block PP has a synthetic melting point. Since the temperature is 140 to 150 ° C (or 160 to 165 ° C), in the case of block PP, the one on the low melting point side is used. Further, as the random PP having the lowest melting point, one having a melting point of about 135 to 145 ° C. or one having a melting point of 135 to 150 ° C. can be used. In the present embodiment, random PP can be used as the PP of the raw material fiber of the non-woven fabric, and in this case, the melting point of the random PP is as low as 125 ° C.

[Type of non-woven fabric (type by melting point)]
In the laminated paper of the present invention, when the non-woven fabric as the intermediate layer sheet is an arbitrary non-woven fabric, some non-woven fabrics do not adhere well to the crepe paper due to the melting point. Therefore, as the nonwoven fabric 2 of the laminated paper 10, the crepe paper 1 has a heat-sealing component (for example, a core) of the nonwoven fabric 2 at a predetermined heating temperature at the time of heat fusion by the heat-sealing portion row 11 in the laminated paper manufacturing apparatus. A non-woven fabric having a melting point that can be reliably adhered to the non-woven fabric 2 by means of PE or the like in 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 a structure in which a pair of crepe papers are bonded to the non-woven fabric by the adhesive force of only the linear heat-sealing portion row, so that the amount is small. The type of non-woven fabric is selected so that sufficient bonding force can be obtained between the crepe paper and the non-woven fabric with sufficient adhesive area. As such a non-woven fabric, a core-sheath type composite fiber as a polyester-based composite fiber and a non-woven fabric manufactured by using a heat-sealing fiber for non-woven fabric can be used. For example, as the non-woven fabric in this case, 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 or 10 mm, and a sheath component softening point of about 110 ° C. can be used, or a fineness of 1.7 dtex and a cut length of 5 mm. , Use a non-woven fabric made of a core-sheath type composite fiber with a sheath component softening point of about 110 ° C, or use a non-woven fabric made of a core-sheath type composite fiber with a fineness of 2.2 dtex, a cut length of 5 mm, and a sheath component softening point of about 130 ° C. Can be used. Alternatively, a non-woven fabric obtained by appropriately mixing two or more of the above-mentioned core-sheath type composite fibers as a raw material fiber may be used.

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

[Manufacturing equipment configuration]
As shown in FIG. 9, the laminated paper manufacturing apparatus of the fifth embodiment has three support rollers 51, 52, and 53 arranged side by side, each of which is a raw material sheet for one of the pair of crepe papers. The roll-shaped crepe paper 21 as the raw material sheet for crepe paper, the roll-shaped non-woven fabric 22 as the raw material sheet for the non-woven fabric (nonwoven fabric raw material sheet), and the raw material sheet for the other crepe paper (crepe paper raw material sheet) of the pair of crepe papers. ), The other roll-shaped crepe paper 23 is supported so as to be rotatable and supplyable. Further, one roll-shaped crepe paper 21, roll-shaped non-woven fabric 22, and one crepe paper 1, non-woven fabric 2, and the other crepe paper 1 drawn from the other roll-shaped crepe paper 23 are in a laminated state, respectively. (That is, in a laminated state of three layers) constitutes a raw material sheet (laminated paper raw material sheet) of the laminated paper 10. The laminated paper raw material sheet is folded back by the first guide roller 61, and is guided and guided between the first heat seal roller 70 as one crimping roller and the second heat seal roller 80 as the other crimping roller. be introduced. The laminated paper raw 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 first heat seal roller 70 and the second heat seal roller 70. It is inserted between the heat seal roller 80 and the heat seal roller 80. The laminated paper raw material sheet in the stage before being inserted between the first heat seal roller 70 and the second heat seal roller 80 is in a state where the crepe paper 1 and the non-woven fabric 2 are not heat-sealed. It is a laminated paper 10X before fusion.

Next, the crepe paper 1 and the nonwoven fabric 2 in the laminated state are heat-sealed between the first and second heat seal rollers 70 and 80 to form the laminated paper 10 having the heat-sealed portion 11. The laminated paper raw material sheet at the stage after heat fusion is a laminated paper 10Y after heat fusion in which the crepe paper 1 and the nonwoven fabric 2 are heat-sealed. Then, the long heat-sealed laminated paper 10Y derived from the first and second heat seal rollers 70 and 80 (as the base paper before cutting) is the third guide roller 63 and the fourth guide. It is folded back by the roller 64 and guided to the take-up roller 55. The take-up roller 55 winds up the laminated paper 10Y after heat fusion to obtain a roll-shaped laminated paper 10R. The roll-shaped laminated paper 10R is removed from the take-up roller 55 and used as a base paper for a paper towel or the like. A slitter is arranged between the fourth guide roller 64 and the take-up roller 55, and after heat fusion, 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 side by side. Then, it is wound on 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. 10 to 13. FIG. 10 shows a state in which the first and second heat seal rollers 70 and 80 of FIG. 9 are viewed from the upper surface side, and the axes of the first and second heat seal rollers 70 and 80 are parallel to each other. As described above, the laminated paper 10X before heat fusion is arranged side by side in front of and behind the supply direction and opposed to each other. Further, the first and second heat seal rollers 70 and 80 have the same predetermined roller length L (for example, an axial length of an arbitrary value within the range of 1200 mm to 1500 mm) and have the same predetermined roller diameter. It has a D (eg, a diameter of any value in 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-crimping portion 71 having a ring concave groove shape with a constant width on the peripheral surface thereof. And the thermocompression bonding convex portions 72 forming a dashed convex ring shape (or a broken line convex strip shape) having a constant width are arranged side by side in parallel with each other so as to be every other in the axial direction thereof. As shown in FIG. 11, each of the non-crimping portions 71 intermittently extends as an arcuate surface in the circumferential direction along the peripheral surface of the first heat seal roller 70, and is crimped to be a flat surface in the width direction. It has a surface 72a. Specifically, each of the thermocompression bonding convex portions 72 extends linearly in the circumferential direction along the peripheral surface of the first heat seal roller 70 by a predetermined length (as the peripheral surface of the thermocompression bonding convex portion 72). The crimping surfaces 72a are continuously arranged at regular intervals in the circumferential direction of the first heat seal roller 70. The thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 becomes an arcuate surface (curved surface) in the length direction, and the arc length is the first thermocompression bonding portion 11a or the first thermocompression bonding portion 11a of the thermocompression bonding portion row 11. The length is set to be the same as the length of the heat-sealed portion 11b of 2. Further, 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 bonding portion 11a or the second heat of the heat bonding portion row 11. The width is set to be the same as the width of the fused portion 11b. Further, the distance between the gaps between the adjacent thermocompression bonding surfaces 72a of the thermocompression bonding convex portions 72 of each row is such that the adjacent first thermocompression bonding portion 11a or the second thermocompression bonding portion 11a of the thermocompression bonding portion row 11 is heat-sealed. It is set to the same dimension as the gap between the portions 11b.

As described above, in the first heat seal roller 70, the thermocompression bonding convex portion 72 forming a broken line convex ring shape is formed on the entire circumference in the circumferential direction, and the heat-sealed portion row 11 in one row of the laminated paper 10 is formed. It is configured to form. Further, in the first heat seal roller 70, the thermocompression bonding convex portions 72 of a large number of rows are spaced apart from each other at the same fixed spacing as the arrangement spacing of the heat-sealed portion rows 11 of the multi-row of the laminated paper 10 in the width direction. They are arranged side by side continuously over the entire axial direction so as to be parallel. As a result, the first heat seal roller 70 has a non-crimping portion 71 having a ring concave groove shape between the adjacent thermocompression bonding convex portions 72, respectively. Further, in the first heat seal roller 70, the non-crimping portions 71 in a large number of rows are parallel to each other at the same fixed intervals as the non-fused portions 12 of the laminated paper 10 over the entire axial direction. They are arranged side by side continuously. Further, in the first heat seal roller 70, the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 in the adjacent row has the center position in the length direction of the thermocompression bonding surface 72a of one thermocompression bonding convex portion 72 on the other. The positions of the first thermocompression bonding rollers 70 in the circumferential direction are offset from each other so as to be in the middle position of the gap between the adjacent thermocompression bonding surfaces 72a of the thermocompression bonding convex portions 72. As a result, as shown in FIGS. 11, 12, and 13, the thermocompression bonding convex portion 72 is the thermocompression bonding convex portion of the first row corresponding to the thermocompression bonding portion row 11A of the first row of the laminated paper 10. It is composed of a portion 72A and a thermocompression bonding convex portion 72B of the second row corresponding to the heat-sealing portion row 11B of the second row. The heat-bonded convex portion 72A in the first row has a heat-bonded surface 72a on the first heat-sealing roller corresponding to the first heat-bonded portion 11a in the heat-sealed portion row 11A in the first row. Arranged in the circumferential direction of 70, the heat-bonded convex portion 72B in the second row has a heat-bonded surface 72a corresponding to the second heat-bonded portion 11b of the heat-sealed portion row 11B in the second row. It is arranged in the circumferential direction of the first heat seal roller 70.

Further, as shown in FIG. 10, the heat-bonded surface 72a of the heat-sealing convex portion 72 extends linearly in a plan view (in the circumferential direction of the second heat seal roller 70, it is curved along the peripheral surface). It is composed of a straight strip portion 72x (extending to) and a semicircular curved portion 72y at both ends of the straight strip portion 72x in the length direction. As a result, the crepe paper raw material sheet of the laminated paper raw material sheet is heat-bonded and heat-sealed to the non-woven raw material sheet by the heat-bonding surface 72a of the heat-bonding convex portion 72 of the heat-sealing roller 70. Each of the heat-sealed portions 11a and 11b of the bonded portion row 11 corresponds to the outer shape of each heat-bonded surface 72a in the length direction of the laminated paper 10 as shown in FIGS. 1 and 2 and FIG. It is composed of a straight strip-shaped portion extending linearly and semi-circular portions at both ends in the length direction of the straight strip-shaped portion. Further, as shown in FIG. 13, a pair of side surfaces 72b extend orthogonally to the thermocompression bonding surface 72a on both sides of the thermocompression bonding surface 72a of each thermocompression bonding convex portion 72 in the width direction.

[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 has a ring concave groove shape having a constant width on the peripheral surface thereof. The portions 81 and the thermocompression bonding convex portions 82 forming a convex ring shape (or convex strip shape) having a constant width are arranged side by side in parallel with each other so as to be every other portion in the axial direction thereof. As shown in FIG. 11, each of the non-crimping portions 81 is continuously formed as an arcuate surface in the circumferential direction along the peripheral surface of the second heat seal roller 80 (that is, the circumference of the second heat seal roller 80). It has a crimping surface 82a (as the peripheral surface of the thermocompression bonding convex portion 82) that extends (over the entire circumference of the surface) and becomes a flat surface in the width direction. The thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 becomes an arcuate surface (curved surface) in the length direction. Further, the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 has a flat surface shape in the width direction, and the width thereof is the first thermocompression bonding portion 11a or the second thermocompression bonding portion 11 of the thermocompression bonding portion 11. 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).

As described above, the second heat seal roller 80 has a thermocompression bonding convex portion 82 forming a convex ring shape all around the circumference in the circumferential direction at a position facing the thermocompression bonding convex portion 72 of the first heat sealing roller 70. It is formed over. As a result, the heat-bonded laminated paper 10X is sandwiched between the heat-bonded convex portion 72 of the first heat-sealing roller 70 and the heat-bonded convex portion 82 of the second heat-sealed roller 80, and the heat-bonded convex portion The laminated paper 1 of the pre-heat fusion laminated paper 10X is heat-bonded and heat-sealed to the non-woven fabric 2 between the heat-bonding surface 72a of the portion 72 and the heat-bonding surface 82a of the heat-bonding convex portion 82. The heat-sealed portion row 11 of the paper 10 is formed.

Further, 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 thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat sealing roller 70. The width is set to be larger than the width by a certain dimension, and the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 and the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 face each other (thickness of the thermocompression bonding portion 11 of the laminated paper 10). When arranged in a substantially close contact state (with a gap of minutes), both sides of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 in the width direction, respectively, at both ends of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 in the width direction. A certain width part is exposed. As a result, 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, the crepe paper 1 of the pre-thermocompression bonding paper 10X is thermocompression bonded and heat fused to the non-woven fabric 2. At this time, both ends of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 in the width direction are arranged on the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82, and the thermocompression bonding surface of the thermocompression bonding convex portion 72 The external force (particularly, shearing force) applied to the pre-thermally fused laminated paper 10X from both ends 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 surface 72a of the thermocompression bonding convex portion 72 and the thermocompression bonding surface 72a are heat-bonded. When the crepe paper 1 of the laminated paper 10X before thermocompression bonding is thermocompression-bonded and heat-sealed to the non-woven fabric 2 between the thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82, the thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72 Both ends in the width direction are arranged at the same positions as both ends in the width direction of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82, and heat fusion is performed from both ends in the width direction of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72. Since the external force (particularly, shearing force) applied to the pre-adhesion laminated paper 10X becomes large, there is a possibility that a part of the pre-bonding laminated paper 10X (particularly, crepe paper 1) may be 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 seal roller 80 is set to the heat pressure bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat seal roller 70. By setting the width by a certain dimension larger than the width, such a problem can be surely prevented. On both sides of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 of the second heat seal roller 80 in the width direction, the pair of side surfaces 82b are inclined at a predetermined angle with the thermocompression bonding surface 82a (obtuse angle). Extends (at an angle). As described above, in the laminated paper manufacturing apparatus, the thermocompression bonding surfaces 72a and 82a of the thermocompression bonding protrusions 72 and 82 are heated by the heat sealing roller 80 below the thermocompression bonding surface 72a of the upper heat sealing roller 70. The crimping surface 80 is wide, and the corners of both ends of the thermocompression bonding convex portion 92 of the lower heat sealing roller 80 in the width direction are cut (cut out) to form a taper (chatomed shape) or a rounded shape. It is preferable to have a cut shape such as (curved chamfered shape).

[Roller length and roller 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 set to a value of less than 1200 mm, the productivity may decrease. On the other hand, if the roller length L of the heat seal rollers 70 and 80 is set to a value exceeding 1500 mm, the problem of the crown phenomenon described later may occur. Further, 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 set to a value of less than 180 mm, the crimping force of the thermocompression bonding portion of the pre-heat fusion laminated paper 10X by the thermocompression bonding protrusions 72 and 82 may be insufficient. On the other hand, if 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 arises.

[Relationship between the roller diameter of the heat seal roller, the roller length, and the pressing force during thermocompression bonding]
In the heat-bonding operation of the pre-heat-sealing laminated paper 10X by the heat-sealing rollers 70, 80, the heat-bonding convex portions 72, 82 are laminated before heat-sealing due to the roller diameter D and the roller length L of the heat-sealing rollers 70, 80. The present inventor has obtained the finding that the pressing force applied to the heat-sealed portion of the paper 10X changes. Further, the present inventor applies the heat-bonded convex portions 72 and 82 to the heat-bonded portion of the pre-heat-sealed laminated paper 10X in the heat-bonding operation of the heat-sealed laminated paper 10X by the heat seal rollers 70 and 80. The pressing force (hereinafter referred to as "pressing pressure at the time of heat crimping") is applied even when the roller length L of the heat seal rollers 70 and 80 is small in order to reliably form the heat-sealed portions 11 and 11b. It has been found that the value should be at least 2 to 3 atm or higher. When the roller length L of the heat seal rollers 70 and 80 is 1400 mm, the pressing pressure during thermocompression bonding is preferably 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 laminated paper 10X before heat fusion has sufficient durability up to a pressure of 5 atm to 7 atm during heat crimping by the heat seal rollers 70 and 80. Therefore, this range is the most suitable as the pressing force at the time of thermal crimping. If the pressing pressure during thermocompression bonding is 7 atm or more, the laminated paper 10X before thermocompression bonding may be damaged (for example, a part of the thermocompression bonding convex portion 72 corresponding to the corner portion of the thermocompression bonding surface 72a may be torn). There is sex.

Further, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm and the pressing force during heat crimping is 7 atm or more, the heat seal rollers 70 and 80 have a so-called crown phenomenon (heat seal rollers 70 and 80 have diameters). A phenomenon in which a gap is formed between the heat seal rollers 70 and 80 due to bending in the direction) may occur. When this crown phenomenon occurs, the heat 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 the front view. In this case, the radial gap interval 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 in the large range. A gap will be created. Therefore, although the gap between the heat seal rollers 70 and 80 due to this crown phenomenon is a minute gap of 1 mm or less, the thickness of the laminated paper raw material sheet (laminated paper 10X before heat fusion) is as thin as 1 mm or less, so that the heat seal is performed. The heat-bonded surfaces 72a and 82a of the rollers 70 and 80 may be in a state of floating from the laminated paper 10X before heat fusion, and a gap may be generated between them. In this case, the heat of the heat seal rollers 70 and 80 is generated. The pressure-bonded surfaces 72a and 82a make it impossible to pressure-bond the heat-sealed portion of the pre-heat-sealed laminated paper 10X.

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 preferably 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 pressure during thermocompression bonding is less than 5.5 atm, the laminated paper 10X before thermocompression bonding is heat-sealed by the thermocompression bonding protrusions 72 and 82. It may not be possible to form the portion stably (that is, the adhesive strength of the heat-sealed portion may be insufficient). On the other hand, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm and the pressing force during heat bonding exceeds 7 atm, excessive pressure is applied to the heat-sealed portion of the pre-heat-sealed laminated paper 10X. In addition, the heat-sealed portion may harden during bonding. Further, when the roller length L of the heat seal rollers 70 and 80 is 1200 mm, the pressing pressure at the time of thermocompression bonding can be 4.5 atm. Further, when the roller length L of the heat seal rollers 70 and 80 is 1500 mm, the pressing force during 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 pressure during thermocompression bonding is less than 7.5 atm, the laminated paper 10X before thermocompression bonding is heat-sealed by the thermocompression bonding protrusions 72 and 82. It may not be possible to form the portion stably (that is, the adhesive strength of the heat-sealed portion may be insufficient). On the other hand, when the roller length L of the heat seal rollers 70 and 80 is 1500 mm and the pressing pressure during heat crimping exceeds 8 atm, excessive pressure is applied to the heat-sealed portion of the laminated paper 10X before heat-sealing. In addition, the heat-sealed portion may harden during bonding.

[Temperature control of heat seal roller]
In the laminated paper manufacturing equipment, heat is reliably fused between the crepe paper as the outer layer sheet and the intermediate layer sheet (non-woven fabric, opaque sheet, etc.) at the heat-sealed portion of the laminated paper 10X before heat fusion. The temperature at the time of heat crimping of the seal rollers 70 and 80 (hereinafter referred to as "heat crimping temperature") is set within the range of 175 to 200 ° C., and the temperature distribution is in the length direction of the heat seal rollers 70 and 80. It is preferable to control the temperature so that it is constant over the entire area. When the heat pressure bonding temperature of the heat seal rollers 70 and 80 is 175 ° C. or lower, the crepe paper and the non-woven fabric cannot be reliably bonded by heat fusion at the heat fusion portion of the pre-heat fusion laminated paper 10X. On the other hand, when the thermal pressure bonding temperature is 200 ° C. or higher, the heat-adhesive resin (PP (polypoly), PE (polyethylene), etc.) of the intermediate layer sheet is cured and deteriorated, or the intermediate layer sheet itself such as a non-woven fabric is cured and heat is generated. The fusing fiber material (heat-fusing synthetic resin fiber) may not exhibit the fusing function (that is, this makes it impossible to bond the crepe paper by fusing). Further, as shown in FIG. 15A, the heat crimping temperature of the heat seal rollers 70 and 80 is the rotation speed of the heat seal rollers 70 and 80 (that is, the supply speed of the laminated paper 10X before heat fusion, in other words. It is preferable to control the temperature and rotation 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 rate in the length direction of the heat-sealed portion.

[Heat seal roller rotation control]
In the laminated paper manufacturing equipment, heat is reliably fused between the crepe paper as the outer layer sheet and the intermediate layer sheet (non-woven fabric, opaque sheet, etc.) at the heat-sealed portion of the laminated paper 10X before heat fusion. After the seal rollers 70 and 80 reach the heat crimping temperature within the above setting range, the heat seal rollers 70 and 80 are started to rotate to form the heat-sealed portion of the pre-heat-sealed laminated paper 10X. do. Further, the heat crimping temperature of the heat seal rollers 70 and 80 is controlled to be constant within the above setting range, but the rotation speed of the heat seal rollers 70 and 80 is the thickness of the laminated paper raw material sheet (that is, laminating before heat fusion). It is preferable to control by increasing or decreasing according to the thickness of the paper 10X). That is, as shown in FIG. 15 (c), the rotation speed of the heat seal rollers 70 and 80 is increased or decreased in proportion to the thickness (base paper thickness) of the pre-heat-fused laminated paper 10X in the laminated paper manufacturing apparatus. It is preferable to control the rotation of the heat seal rollers 70 and 80. Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is maintained constant, and the rotation speed (feeding speed of the base paper) of the heat seal rollers 70 and 80 is increased or decreased according to the thickness of the base paper. Similarly, as shown in FIG. 15 (d), the rotation speeds of the heat seal rollers 70 and 80 are laminated so as to increase or decrease in proportion to the thickness (nonwoven fabric thickness) of the nonwoven fabric raw material sheet of the heat-sealed laminated paper 10X. It is also possible to control the rotation of the heat seal rollers 70 and 80 with a paper manufacturing apparatus. Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is maintained constant, and the rotation speed (feeding speed of the base paper) of the heat seal rollers 70 and 80 is increased or decreased according to the thickness of the non-woven fabric. Further, as shown in FIG. 15B, the heat pressure bonding temperature of the heat seal rollers 70 and 80 increases or decreases in proportion to the thickness of the non-woven fabric of the laminated paper 10X before heat fusion (non-woven fabric thickness). The temperature of the heat seal rollers 70 and 80 can also be controlled by the manufacturing apparatus. Also in this case, the rotation speeds of the heat seal rollers 70 and 80 are maintained constant, and the thermocompression bonding temperature of the heat seal rollers 70 and 80 is increased or decreased according to the thickness of the non-woven fabric. Here, the thermocompression bonding speed (the length of the row of heat-sealed portions formed on the pre-heat-fused laminated paper 10X per unit time) by the heat-seal roller is preferably set to, for example, 20 m / min.

[Uniform temperature control]
As described above, the laminated paper manufacturing apparatus controls the heat pressure bonding temperature of the heat seal rollers 70 and 80 so as to have a uniform temperature distribution over the entire heat seal rollers 70 and 80, and controls the temperature at the heat fusion unit. However, the configuration shown in FIG. 12 can be adopted as the configuration for this temperature control, although the adhesion unevenness is prevented from occurring. 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, respectively, 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. Then, in the laminated paper manufacturing apparatus, external water supply means are connected to the internal spaces 70S and 80S of the heat seal rollers 70 and 80, respectively, and the internal spaces 70S of the heat seal rollers 70 and 80 are connected from the water supply means. Moisture is supplied to each of the 80S, and when the heat seal rollers 70 and 80 are heated, the water vapor obtained by heating the water is used to maintain the temperature of the heat seal rollers 70 and 80 constant. 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 and 80 constant, or when the heat seal rollers 70 and 80 are operated, saturated steam or superheated steam is supplied to the internal spaces 70S and 80S. Then, the water vapor 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 adhered to the inner surface of the heat seal rollers 70, 80 so as to form a thin layer or film, and the layered or film steam forms the entire heat seal rollers 70, 80. It is designed to maintain a uniform temperature. Then, the laminated paper manufacturing apparatus heats the heat seal rollers 70, 80 by a predetermined heating means and raises the temperature to the heat pressure bonding temperature by the start of the heat pressure bonding operation by the heat seal rollers 70, 80. For example, in a laminated paper manufacturing apparatus, an induction coil is wound and arranged inside the heat seal rollers 70 and 80, and an alternating current is output to the induction coil to induce and generate an eddy current in the heat seal rollers 70 and 80. As a result, the heat seal roller is heated to the predetermined heat crimping temperature by Joule heat generation, and the predetermined temperature is controlled to be kept constant. Then, in addition to the induced heating by the induced heating means, the heat seal rollers 70 and 80 are placed over the entire circumferential direction and the entire length direction (in particular, all) by the temperature constant operation by the steam. The predetermined thermocompression bonding temperature is controlled to be maintained uniformly and evenly (over the entire surface of the thermocompression bonding surfaces 72a and 82a of the thermocompression bonding protrusions 72 and 82). As a result, the temperature distribution of the thermocompression bonding surfaces 72a and 82a of the thermocompression bonding protrusions 72 and 83 of the heat seal rollers 70 and 80 is maintained to be absolutely the same (uniform) over the entire surface. The heating means (heating heater) of the heat seal rollers 70 and 80 is preferably an electric structure as described above (for example, an induction heating type structure such as the induction heating means). By doing so, it is possible to avoid the risk of oil leakage as in the case where the heating means is an oil heater type, and the temperature distribution of the heat seal rollers 70 and 80 is also due to the heating means itself as compared with the oil heater type. Can contribute to the constantization of.

Further, in the laminated paper manufacturing apparatus, the pressing force during thermocompression bonding of the heat seal rollers 70 and 80 is particularly applied 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. It is controlled to be constant over the entire surface of the facing surface. As described above, it is preferable that the laminated paper manufacturing apparatus simultaneously controls the temperature distribution of the heat seal rollers 70 and 80 and the pressure distribution, and by doing so, the heat-sealed portion row of the laminated paper 10. Adhesion unevenness in each of the heat-sealed portions 11a and 11b of 11 can be eliminated as much as possible.

[Manufacturing method of laminated paper]
The laminated paper of the present invention including the invention of the laminated paper 10 of the first to third embodiments is preferably produced by the method for producing a laminated paper described below. As the method for producing the laminated paper, the laminated paper manufacturing apparatus according to the fifth embodiment can be preferably used.

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, 80 are used as means for forming the heat-sealed portion row 11 of the laminated paper 10 (hereinafter, referred to as “heat-sealed means”). However, as a heat-sealing means for forming the heat-sealed portion row 11 of the laminated paper 10, in addition to this structure, crepe paper is used by high-frequency welding or ultrasonic welding. It is possible to adopt a structure that adheres to an intermediate layer sheet such as a non-woven fabric (by the fusion operation of the heat fusion component of the intermediate layer sheet). According to these heat fusion means using high frequency welding or ultrasonic welding, it is easy to adjust the bonding temperature by heat fusion, there is a wide variety of materials, and a sheet of thermoplastic resin film with a low melting point is inexpensive. There is a possibility that various materials can be used. For example, in the laminated paper manufacturing apparatus shown in FIG. 16, a high-frequency sewing machine as a high-frequency welding means is provided in the heat-sealing means. The laminated paper manufacturing apparatus of the sixth embodiment is basic except that the pair of heat seal rollers 70 and 80 of the laminated paper manufacturing apparatus of the fifth embodiment shown in FIG. 9 is replaced with the high frequency sewing machine 100. Has the same configuration as that of the laminated paper manufacturing apparatus of the fifth embodiment, and has a three-layer structure (three-sheet combined structure) in which a non-woven fabric 2 is interposed between a pair of crepe papers 1 before heat fusion. The paper 10X is guided to and fed to the high-frequency sewing machine 100 by the guide rollers 61 and 62, and the heat-sealing portion row 11 is formed at a predetermined position of the heat-sealing laminated paper 10 by the high-frequency sewing machine 100, and then the heat thereof is formed. After fusing, the laminated paper 10Y is guided by the guide rollers 63 and 64 and wound on the take-up roller 55.

[High frequency sewing machine]
In the high frequency sewing machine 100, the first welding roller 101 and the second welding roller 102 are arranged to face each other, and the laminated paper before heat welding is placed between the first welding roller 101 and the second welding roller 102. 10X is sandwiched and high-frequency welded to form the heat-welded 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. In addition, it is preferable to perform various controls so that the temperature is controlled to a constant level according to various conditions such as the thickness of the base paper and the thickness of the non-woven fabric.

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

First, the laminated paper according to the first aspect of the present invention comprises a pair of crepe papers as an outer layer sheet and a heat-sealing intermediate layer sheet arranged between the crepe papers in a laminated state. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper to form a laminated structure. Further, in the laminated paper of the present invention, a printing portion is provided on the intermediate layer sheet or the inner surface of the crepe paper, and the printing portion increases the thickness of the crepe paper when the crepe paper is in a wet state. The thickness is set so that it can be visually recognized from the outside through paper.

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

The laminated paper manufacturing apparatus according to the third aspect of the present invention is the laminated paper manufacturing apparatus according to the first aspect, and the first and second paired to form the heat-sealed portion row. The first heat-sealing roller includes a heat-sealing roller, and the first heat-sealing roller has a ridge-shaped heat-bonding convex portion corresponding to the heat-sealing portion, and the peripheral surface of the heat-bonding convex portion is a heat-bonding surface. The second heat-sealing roller has a convex-shaped heat-bonding convex portion facing the heat-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the heat-bonding convex portion is covered with the first heat-sealing. The heat crimping surface faces the heat crimping surface of the roller, and the width of the heat crimping surface of the heat crimping convex portion of the second heat seal roller is the heat crimping surface of the heat crimping convex portion of the first heat seal roller. The width is set to be larger than the width by a certain dimension.

Further, the laminated paper of the present invention from another viewpoint is composed of a crepe paper as a pair of outer layer sheets and a heat-sealing intermediate layer sheet disposed between the crepe papers in a laminated state, and the crepe. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the paper to form a laminated structure, and one crepe paper as the outer layer sheet. A printing portion is provided on the surface of the intermediate layer sheet facing the surface of the intermediate layer sheet, and the thickness of the crepe paper is adjusted by the printing portion provided on the surface of the intermediate layer sheet when the crepe paper is in a wet state. The thickness is set so that it can be visually recognized from the outside, and even when the crepe paper is dry, the printing portion provided on the intermediate layer sheet penetrates the crepe paper and is visible from the outside, and when the crepe paper contains water, the printing portion The crepe paper so that the transparency of the printing section provided on the intermediate layer sheet from the crepe increases and the visibility of the printing section provided on the intermediate layer sheet from the outside through the crepe paper increases. Of these, at least the thickness of the crepe paper on the side of the intermediate layer sheet on which the printing portion is provided is set. The laminated paper of the present invention is composed of a crepe paper as a pair of outer layer sheets and a heat-sealing intermediate layer sheet disposed between the crepe papers in a laminated state, and the crepe wrinkles of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the intermediate layer sheet to form a laminated structure, and the intermediate layer sheet or the crepe paper is formed. It is also possible to provide a printing portion on the inner surface and set the thickness of the crepe paper so that the printing portion can be visually recognized from the outside through the crepe paper when the crepe paper is in a wet state. can.

Further, the method for producing a laminated paper of the present invention from another viewpoint is the method for producing a laminated paper from another viewpoint, wherein the intermediate layer sheet is made of a non-woven fabric, and the outer sheath is inner with polyethylene as the non-woven fabric. A non-water-absorbent air-through non-woven fabric produced by bonding fibers with a core-sheath structure composite fiber whose core is polyethylene terephthalate by an air-through method without using an adhesive is used, and the printing unit is a printing method. To compensate for shrinkage of the printed part on the non-woven fabric raw material sheet, which is formed by using water-based ink or ultraviolet curable ink as the printing ink, using flexo printing technology. , The printed portion is printed on the nonwoven fabric using a nonwoven fabric raw material sheet having a width having a size larger than the width of the laminated paper to be actually obtained by a predetermined ratio according to the shrinkage rate. In the method for producing laminated paper of the present invention, the intermediate layer sheet is made of a non-woven fabric, and the shrinkage rate is adjusted in order to compensate for the shrinkage of the printed portion on the non-woven fabric raw material sheet which is the raw material sheet of the non-woven fabric. Accordingly, it is possible to configure the non-woven fabric raw material sheet having a width having a width larger than the width of the laminated paper to be actually obtained by a predetermined ratio.

The laminated paper manufacturing apparatus according to another aspect of the present invention is the laminated paper manufacturing apparatus according to the other aspect, and is a pair of first and second heats for forming the heat-sealed portion row. The first heat seal roller includes a seal roller, and the first heat seal roller has a ridge-shaped heat-bonded convex portion corresponding to the heat-sealed portion, and the peripheral surface of the heat-bonded convex portion is a heat-bonded surface. The heat-sealing roller 2 has a convex-shaped heat-bonding convex portion facing the heat-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the heat-bonding convex portion is formed on the peripheral surface of the heat-bonding convex portion by the first heat-sealing roller. The width of the heat-bonded convex portion of the second heat-seal roller is the width of the heat-bonded surface of the heat-bonded convex portion of the first heat-seal roller. The width is set to be larger by a certain dimension than.

Alternatively, the present invention can be grasped as the invention of the laminated paper described below, the method for producing the laminated paper, or the apparatus for producing the laminated paper.

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

Further, in the above invention, the intermediate layer sheet is made of a material capable of printing the printed portion, and the crepe paper as the outer layer sheet is heat-sealed in the heat-sealed section row to be bonded. The printed portion may be grasped as a laminated paper characterized by being provided on the surface of the non-woven fabric facing one of the crepe papers as the outer layer sheet.

Further, the present invention can also be grasped as a laminated paper characterized in that the printing unit is provided on the inner surface of one of the crepe papers as the outer layer sheet.

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

Further, the present invention can also be grasped as a laminated paper characterized in that the nonwoven fabric has a thickness in the range of 15 to 25 g / m ^{2 in terms of basis weight.}

Further, the present invention can also be grasped as a laminated paper characterized in that the ^{crepe paper has a thickness in the range of 20 to 50 g / m 2.}

Further, in the above invention, the widthwise heat-sealing portion spacing, which is the spacing between the widthwise center lines of the adjacent heat-sealing portion rows, is within a predetermined range according to the range of the crepe ratio of the crepe paper. When the crepe ratio of the crepe paper is set to an arbitrary value and the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealed portion spacing in the width direction is set to the range of 10 mm to 15 mm and the crepe paper is set to an arbitrary value. When the crepe ratio is in the range of 26% to 30%, it can be grasped as a laminated paper characterized in that the heat-sealed portion spacing in the width direction is set in the range of 15 to 25 mm.

Further, the present invention is the method for producing a laminated paper of the above invention, wherein the intermediate layer sheet is made of a non-woven fabric and compensates for shrinkage of the printed portion on the non-woven fabric raw material sheet which is the raw material sheet of the non-woven fabric. Therefore, it can be grasped as a method for producing laminated paper, which is characterized by using a nonwoven fabric raw material sheet having a width of a predetermined ratio larger than the width of the laminated paper to be actually obtained according to the shrinkage rate. ..

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

By the way, the present invention according to another aspect will be described. The laminated paper according to the first aspect of the present invention is arranged in a laminated state between a pair of crepe papers as an outer layer sheet and the pair of crepe papers. The crepe paper is made into the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. The crepe paper is heat-sealed to form a laminated structure, the crepe ratio of the crepe paper is set within the range of 20% to 30%, and the distance between the heat-sealed parts in the width direction of the heat-sealed part row is 10 mm to 25 mm. Within the range of the heat-sealed portion spacing in the width direction, the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

Further, to explain the present invention according to another viewpoint, the laminated paper according to the second aspect of the present invention is arranged in a laminated state between the crepe paper as a pair of outer layer sheets and the pair of crepe papers. The crepe paper is made into the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the crepe wrinkles of the crepe paper. When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealed portion spacing in the width direction of the heat-sealed portion row is within the range of 10 mm to 15 mm. When the crepe ratio of the crepe paper is in the range of 26% to 30%, the distance between the heat-sealed portions in the width direction of the heat-sealed portion row is set in the range of 15 to 25 mm. Within the range of the heat-sealed portion spacing in the width direction, the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

The laminated paper of the present invention can be suitably applied to the method for producing the laminated paper and the apparatus for producing the laminated paper, and in the case of the paper towel product, the paper towel product is folded in two, folded in three, folded in four, and the like. It can be applied to paper towel products such as Kannon folding, but in addition to this, roll-shaped base paper can be commercialized as it is and used as the base paper for automatic paper towel making machines, and paper towels can also be used. In addition to products, it can also be applied to sanitary products used for the purposes of nursing care and nursing.

1: Crepe paper 2: Non-woven fabric (heat-sealing 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: First heat seal part (heat seal part)
32: Second heat seal part (heat seal part)
31a, 32a: pressing protrusion, 31b, 32b: non-pressing portion

Claims (19)

It is a paper towel that contains water in the laminated paper.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
The crepe ratio of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion spacing in the width direction of the heat-sealed portion row is set in the range of 10 mm to 25 mm.
A paper towel, characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. It is a paper towel that contains water in the laminated paper.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 10 mm to 15 mm.
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 15 to 25 mm.
A paper towel, characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. A paper towel that is made by moistening laminated paper and has a function.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
The crepe ratio of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion spacing in the width direction of the heat-sealed portion row is set in the range of 10 mm to 25 mm.
A paper towel, characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. A paper towel that is made by moistening laminated paper and has a function.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 10 mm to 15 mm.
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 15 to 25 mm.
A paper towel, characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. In the heat fusion section row, the first heat fusion section having a straight line segment with a constant length and a constant width is arranged in a broken line shape at regular intervals in the length direction, and the first heat fusion section is formed. The second heat-sealed portion having the same constant length as the above and having a constant width in the form of a straight line segment has a first intermediate position between the first heat-sealed portions and the second heat-sealed portions. It is configured by shifting the position so that it matches the intermediate position of the space between the heat-sealed parts of.
The length of each heat-sealed portion is set within the range of 35 mm to 45 mm.
The width of each heat-sealed portion is set within the range of 1.5 mm to 2.5 mm.
The aspect ratio according to any one of claims 1 to 4, wherein the aspect ratio, which is the ratio of the length and the width of each heat-sealed portion, is set in the range of 13: 1 to 23: 1. Paper towel. In each heat-sealing section row, the heat-sealing section spacing, which is the spacing between the heat-sealing sections adjacent in the length direction, is set within the range of 18 mm to 22 mm.
The paper towel according to claim 5, wherein the ratio of the length of each heat-sealed portion to the interval between the heat-sealed portions is set to 2: 1. In the heat fusion section row, the first heat fusion section having a straight line segment with a constant length and a constant width is arranged in a broken line shape at regular intervals in the length direction, and the first heat fusion section is formed. The second heat-sealed portion having the same constant length and a constant width as the first heat-sealed portion, and the intermediate position of each second heat-sealed portion with respect to the first heat-sealed portion is the first. It is configured by shifting the position so that it matches the intermediate position of the space between the heat-sealed parts of.
The paper towel according to any one of claims 1 to 4, wherein each heat-sealed portion of the heat-sealed portion row has a curved shape in a plane semicircle at both ends in the length direction. The thickness of the crepe paper is set in the range of ^{20 to 50 g / m 2 in terms of basis weight.}
The paper towel according to any one of claims 1 to 7, wherein the thickness of the nonwoven fabric is ^{set in the range of 15 to 25 g / m 2 in terms of basis weight.} The non-woven fabric is a non-water-absorbent air-through non-woven fabric produced by bonding fibers with a core-sheath structure composite fiber whose outer sheath is polyethylene and whose inner core is polyethylene terephthalate by an air-through method without using an adhesive. The paper towel according to any one of claims 1 to 8, wherein the paper towel is characterized by being. The nonwoven fabric has ^{a thickness of 20 g / m 2 in} basis weight and has a thickness of 20 g / m 2.
Each of the crepe papers has ^{a thickness of 35 g / m 2 in} basis weight, and has a thickness of 35 g / m 2.
The paper towel according to any one of claims 1 to 9, wherein the total thickness is 90 g / m ^{2 in terms of basis weight.} The nonwoven fabric has ^{a thickness of 20 g / m 2 in} basis weight and has a thickness of 20 g / m 2.
The paper towel according to any one of claims 1 to 9, wherein each crepe paper has ^{a thickness in the range of 20 to 35 m 2 in terms of basis weight.} It is a paper towel product made by moistening laminated paper.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
The crepe ratio of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion spacing in the width direction of the heat-sealed portion row is set in the range of 10 mm to 25 mm.
A paper towel product characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. It is a paper towel product made by moistening laminated paper.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 10 mm to 15 mm.
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 15 to 25 mm.
A paper towel product characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. It is a sanitary product that contains water in laminated paper.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
The crepe ratio of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion spacing in the width direction of the heat-sealed portion row is set in the range of 10 mm to 25 mm.
A sanitary product characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. It is a sanitary product that contains water in laminated paper.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 10 mm to 15 mm.
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 15 to 25 mm.
A sanitary product characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. It is a paper towel product that is made by moistening laminated paper and has a function.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
The crepe ratio of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion spacing in the width direction of the heat-sealed portion row is set in the range of 10 mm to 25 mm.
A paper towel product characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. It is a paper towel product that is made by moistening laminated paper and has a function.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 10 mm to 15 mm.
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 15 to 25 mm.
A paper towel product characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. It is a sanitary product that is made of laminated paper and has a function.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
The crepe ratio of the crepe paper is set in the range of 20% to 30%, and the heat-sealed portion spacing in the width direction of the heat-sealed portion row is set in the range of 10 mm to 25 mm.
A sanitary product characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction. It is a sanitary product that is made of laminated paper and has a function.
The laminated paper is composed of a crepe paper as a pair of outer layer sheets and a non-woven fabric as a heat-sealing intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and is a crepe of the crepe paper. The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing section row extending in a direction orthogonal to the extending direction of the wrinkles to form a laminated structure.
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 10 mm to 15 mm.
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the heat-sealing portion spacing in the width direction of the heat-sealing portion row is set in the range of 15 to 25 mm.
A sanitary product characterized in that the heat-sealed portion spacing in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper within the range of the heat-sealed portion spacing in the width direction.

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