Method for manufacturing laminated sheet, method for manufacturing product obtained by processing laminated sheet, apparatus for manufacturing laminated sheet used in the method for manufacturing laminated sheet, heat seal roller of the apparatus for manufacturing laminated sheet used in the method for manufacturing laminated sheet, apparatus for manufacturing laminated sheet used in the method for manufacturing product obtained by processing laminated sheet, and heat seal roller of the apparatus for manufacturing laminated sheet used in the method for manufacturing product obtained by processing laminated sheet

Abstract

To provide a laminated sheet which has a function with a high added value and whose performance is significantly improved compared to a conventional technique and a product obtained by processing the laminated sheet.SOLUTION: A laminated sheet consists of: crepe sheets as a pair of outer layer sheets; and a thermally fusible intermediate layer sheet arranged in a laminated state between the pair of crepe sheets. A method for manufacturing a laminated sheet includes: thermally fusing the crepe sheet to the intermediate layer sheet using thermal fusion means; forming a linear thermal fusion section line extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe sheet extend and obtaining a laminate structure by thermally fusing the crepe sheet to the intermediate layer sheet. The method for manufacturing a laminated sheet increases a thermal fusion section interval in the width direction proportionally to the increase in the crepe ratio of the crepe sheet within the range of the thermal fusion section interval in the width direction in the laminated sheet.SELECTED DRAWING: Figure 16

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing laminated paper, a method for manufacturing products made by processing laminated paper, a laminated paper manufacturing apparatus used in the laminated paper manufacturing method, a heat seal roller of the laminated paper manufacturing apparatus used in the laminated paper manufacturing method, a laminated paper manufacturing apparatus used in the laminated paper manufacturing method, and a heat seal roller of the laminated paper manufacturing apparatus used in the laminated paper manufacturing method. [Background technology]

[0002] Conventional inventions relating to laminated paper that can be used for paper towels and the like include the invention in Patent Document 1, which is an invention or device of the present inventor, and the invention in Patent Document 2. In these inventions, moisture-absorbent paper having a crepe and a heat-fusible sheet (moisture-absorbent paper or nonwoven fabric mixed with synthetic fibers) are laminated together, a heat-set section or heat-sealed section is formed so as to extend in a direction approximately perpendicular to the crepe of the moisture-absorbent paper, and these are integrated by heat fusion. These inventions can provide laminated paper that is pleasant to the touch and has excellent appearance and usability, and can also be heat-sealed at low temperatures, facilitating processing and reducing manufacturing costs.

[0003] Furthermore, the inventor has also made improvements to conventional laminated papers having the above-mentioned excellent effects in the inventions described in Patent Document 3 and Patent Document 4. These inventions can provide laminated papers that significantly improve the fusion strength of the heat-sealed parts of the crepe paper and the heat-fusible sheet, and increase the overall volume for a further improved appearance. In other words, the laminated papers according to these inventions can obtain sufficient fusion strength even with a small fusion area, and can also increase the overall volume. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 4-24480 [Patent Document 2] Publication No. 4-15116 [Patent Document 3] Japanese Patent Application Publication No. 11-342090 [Patent Document 4] JP 2003-39581 A Summary of the Invention [Problem to be solved by the invention]

[0005] The inventions of Patent Documents 1 to 4 all have effects mainly related to functions, such as significantly improving the touch, appearance, and usability of a laminated paper when it is embodied in a paper towel or the like, significantly improving the fusion strength between the hygroscopic paper and the heat-fusible sheet that constitute the laminated paper, and significantly increasing the overall volume, and thus provide great advantages as a product. Meanwhile, the present inventor came up with the idea of ​​imparting a function with higher added value to conventional laminated paper during or after processing of the laminated paper as a raw material into a final product such as a paper towel, and sought a new laminated paper and a manufacturing method thereof that can dramatically improve the performance of the laminated paper compared to conventional ones. The present inventor then continued to research and develop a laminated paper with such a function with higher added value and dramatically improved performance compared to conventional ones, a manufacturing method for manufacturing the laminated paper, and a manufacturing device for manufacturing the laminated paper, or a manufacturing device used in the manufacturing method, and through repeated trial and error, he came up with the present invention.

[0006] In other words, the present invention aims to provide a method for manufacturing laminated paper and a method for manufacturing products made from processed laminated paper, which have high added-value functions and can produce laminated paper and products made from processed laminated paper with dramatically improved performance compared to conventional methods, as well as to provide a laminated paper manufacturing apparatus and a heat seal roller for the laminated paper manufacturing apparatus to be used in the manufacturing method. [Means for solving the problem]

[0007] In a manufacturing method of a product obtained by processing a laminated paper according to a first aspect of the present invention, the laminated paper comprises a pair of crepe papers as outer layer sheets, and a nonwoven fabric as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. In the manufacturing method of the product, the crepe paper is heat-sealed to the intermediate layer sheet by a linear row of heat-sealed parts extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, the crepe rate of the crepe paper is set within a range of 20% to 30%, and the widthwise heat-sealed part interval of the row of heat-sealed parts is set within a range of 10 mm to 25 mm. In the manufacturing method of the product, when the crepe rate of the crepe paper of the laminated paper is different, the widthwise heat-sealed part interval of the laminated paper is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the widthwise heat-sealed part interval.

[0008] In a method for manufacturing a product obtained by processing laminated paper according to a second aspect of the present invention, the laminated paper comprises a pair of crepe papers as outer layer sheets, and a nonwoven fabric as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. The method for manufacturing the product comprises heat-sealing the crepe paper to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, and when the crepe rate of the crepe paper is within a range of 20% to 26%, the widthwise interval of the row of heat-sealed portions is set within a range of 10 mm to 15 mm, and when the crepe rate of the crepe paper is within a range of 26% to 30%, the widthwise interval of the row of heat-sealed portions is set within a range of 15 mm to 25 mm. In the manufacturing method of the product, when the product has a different crepe rate of the crepe paper of the laminated paper, the widthwise heat-sealed portion spacing of the laminated paper is increased in proportion to the increase in the crepe rate of the crepe paper, within the range of the widthwise heat-sealed portion spacing.

[0009] In a method for manufacturing a product obtained by processing laminated paper according to a third aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. The method for manufacturing the laminated paper comprises heat-sealing the crepe paper to the intermediate layer sheet by a linear row of heat-sealed parts extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, setting the crepe rate of the crepe paper within a predetermined range and setting the widthwise spacing of the heat-sealed parts of the row of heat-sealed parts within a predetermined range, and when the laminated paper has a different crepe rate of the crepe paper, increasing the widthwise spacing of the heat-sealed parts in proportion to the increase in the crepe rate of the crepe paper within the range of the widthwise spacing of the heat-sealed parts.

[0010] In a manufacturing method for a product obtained by processing a laminated paper according to a fourth aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. The manufacturing method for the laminated paper comprises heat-sealing the crepe paper to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, the crepe rate of the crepe paper is set within a predetermined first crepe rate range or a predetermined second crepe rate range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set within a predetermined first width range corresponding to the first crepe rate range or a predetermined second width range corresponding to the second crepe rate range, and when the crepe rate of the crepe paper is different from that of the laminated paper, the widthwise spacing of the heat-sealed portions is increased in proportion to the increase in the crepe rate of the crepe paper within the widthwise spacing range of the heat-sealed portions.

[0011] In a fifth aspect of the present invention, there is provided a method for producing a product obtained by processing a laminated paper, the laminated paper comprising a pair of crepe papers and a nonwoven fabric as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. In a method for producing a product obtained by processing the laminated paper, the crepe paper is heat-sealed to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, the crepe rate of the crepe paper is set within a predetermined range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set within a predetermined range, and when a product is produced in which the crepe rates of the crepe papers of the laminated paper are different, the widthwise spacing of the heat-sealed portions of the laminated paper is increased in proportion to an increase in the crepe rate of the crepe paper within the range of the widthwise spacing of the heat-sealed portions.

[0012] In a manufacturing method for a product obtained by processing laminated paper according to a sixth aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric serving as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. A method for manufacturing a product obtained by processing the laminated paper includes heat-sealing the crepe paper to the intermediate layer sheet to form a laminated structure using a row of linear heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend, the crepe rate of the crepe paper is set within a predetermined first crepe rate range or a predetermined second crepe rate range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set within a predetermined first width range corresponding to the first crepe rate range or a predetermined second width range corresponding to the second crepe rate range, and when the crepe rate of the crepe paper of the laminated paper is different, the widthwise spacing of the heat-sealed portions of the laminated paper is increased in proportion to the increase in the crepe rate of the crepe paper within the widthwise spacing of the heat-sealed portions.

[0013] In a manufacturing method for a product obtained by processing laminated paper according to a seventh aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric serving as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. The method for manufacturing the laminated paper includes heat-sealing the crepe paper to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, setting the crepe rate of the crepe paper within a predetermined crepe rate range and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions within a predetermined heat-sealed portion spacing range, setting the crepe rate of the crepe paper to a predetermined crepe rate within the predetermined crepe rate range and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions to a predetermined heat-sealed portion spacing range of 10 mm to 25 mm, and when the laminated paper has a different crepe rate of the crepe paper, setting the heat-sealed portion spacing to a value that increases in proportion to the increase in the crepe rate of the crepe paper within the predetermined heat-sealed portion spacing range of the widthwise heat-sealed portion spacing.

[0014] In a manufacturing method for a product obtained by processing laminated paper according to an eighth aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric serving as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. The method for manufacturing the laminated paper includes heat-sealing the crepe paper to the intermediate layer sheet using a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, setting the crepe rate of the crepe paper within a predetermined crepe rate range, and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions within a predetermined heat-sealed portion spacing range, setting the crepe rate of the crepe paper to a predetermined value within the predetermined crepe rate range of 20% to 40%, and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions to a predetermined value within the predetermined heat-sealed portion spacing range, and when the crepe rate of the crepe paper is different, setting the heat-sealed portion spacing to a value that increases in proportion to the increase in the crepe rate of the crepe paper within the predetermined heat-sealed portion spacing range of the widthwise heat-sealed portion spacing.

[0015] In a manufacturing method for a product obtained by processing laminated paper according to a ninth aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric serving as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. The method for manufacturing the laminated paper includes heat-sealing the crepe paper to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, setting the crepe rate of the crepe paper within a predetermined crepe rate range and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions within a predetermined heat-sealed portion spacing range, setting the crepe rate of the crepe paper to a predetermined value within the predetermined crepe rate range of 20% to 40% and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions to a predetermined value within the predetermined heat-sealed portion spacing range of 10 mm to 25 mm, and when the crepe rate of the crepe paper is different, setting the heat-sealed portion spacing to a value that increases in proportion to the increase in the crepe rate of the crepe paper within the predetermined heat-sealed portion spacing range of the widthwise heat-sealed portion spacing.

[0016] In a manufacturing method for a product obtained by processing laminated paper according to a tenth aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric serving as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. A method for manufacturing a product obtained by processing the laminated paper includes heat-sealing the crepe paper to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, setting the crepe rate of the crepe paper within a predetermined crepe rate range and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions within a predetermined heat-sealed portion spacing range, setting the crepe rate of the crepe paper to a predetermined crepe rate within the predetermined crepe rate range and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions to a predetermined heat-sealed portion spacing range of 10 mm to 25 mm, and when a product is produced having a different crepe rate of the crepe paper of the laminated paper, setting the heat-sealed portion spacing in the laminated paper to a value that increases in proportion to the increase in the crepe rate of the crepe paper within the predetermined heat-sealed portion spacing range of the widthwise heat-sealed portion spacing.

[0017] In a method for manufacturing a product obtained by processing laminated paper according to an eleventh aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. A method for manufacturing a product obtained by processing the laminated paper includes heat-sealing the crepe paper to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, setting the crepe rate of the crepe paper within a predetermined crepe rate range, and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions within a predetermined heat-sealed portion spacing range, setting the crepe rate of the crepe paper to a predetermined value within the predetermined crepe rate range of 20% to 40%, and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions to a predetermined value within the predetermined heat-sealed portion spacing range, and when the crepe rate of the crepe paper of the laminated paper is to be a product with a different crepe rate, setting the heat-sealed portion spacing in the laminated paper to a value that increases in proportion to the increase in the crepe rate of the crepe paper within the predetermined heat-sealed portion spacing range of the widthwise heat-sealed portion spacing.

[0018] In a method for manufacturing a product obtained by processing laminated paper according to a twelfth aspect of the present invention, the laminated paper comprises a pair of crepe papers and a nonwoven fabric serving as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers. A method for manufacturing a product obtained by processing the laminated paper includes heat-sealing the crepe paper to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, setting the crepe rate of the crepe paper within a predetermined crepe rate range, and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions within a predetermined heat-sealed portion spacing range, setting the crepe rate of the crepe paper to a predetermined value within the predetermined crepe rate range of 20% to 40%, and setting the widthwise heat-sealed portion spacing of the row of heat-sealed portions to a predetermined value within the predetermined heat-sealed portion spacing range of 10 mm to 25 mm, and when a product having a different crepe rate of the crepe paper of the laminated paper is produced, setting the heat-sealed portion spacing in the laminated paper to a value that increases in proportion to the increase in the crepe rate of the crepe paper, within the predetermined heat-sealed portion spacing range of the widthwise heat-sealed portion spacing. Effect of the Invention

[0019] According to the method for manufacturing laminated paper and the method for manufacturing products made by processing laminated paper of the present invention, it is possible to provide laminated paper and products made by processing laminated paper that have high added-value functions and have performance that is dramatically improved compared to conventional methods. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a plan view showing a first specific example (laminate paper having a pattern portion) of laminate paper (laminate paper having a printed portion) according to a first embodiment of the present invention. [Diagram 2] Figure 2 is an enlarged plan view of the laminated paper of embodiment 1 of the present invention, taken along line AA in Figure 1, where (a) shows the dry state of the laminated paper of embodiment 1, and (b) shows the swollen state of the laminated paper of embodiment 1 when it absorbs water. [Diagram 3]FIG. 3 is a plan view showing a second specific example of the laminated paper sheet according to the first embodiment of the present invention (laminated paper sheet having an advertising portion). [Figure 4] FIG. 4 is a side view showing the laminated paper according to the first embodiment of the present invention. [Diagram 5] 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 view of the area where the printed layer is provided within the dashed-dotted circle. [Figure 6] Figure 6 is a cross-sectional view showing a laminated paper (laminated paper having a printed portion) according to embodiment 2 of the present invention, cut horizontally, and shows an enlarged view of the circular portion indicated by the dotted line (the portion where the printed layer is provided). [Figure 7] FIG. 7 is an enlarged cross-sectional view showing a laminated paperboard (a laminated paperboard having a plurality of intermediate layer sheets) according to a third embodiment of the present invention, cut in the horizontal direction. [Figure 8] FIG. 8 is an enlarged cross-sectional view showing a laminated paperboard (a laminated paperboard having a water-impermeable intermediate layer sheet) according to a fourth embodiment of the present invention, cut in the horizontal direction. [Figure 9] FIG. 9 is a side view that shows a schematic diagram of a laminated paper manufacturing apparatus (heat seal roller type laminated paper manufacturing apparatus) according to a fifth embodiment of the present invention. [Figure 10] FIG. 10 is a side view showing, in outline, a heat seal roller of a laminated paper manufacturing apparatus according to embodiment 5 of the present invention, and shows an enlarged circular portion indicated by a dashed dotted line for the purpose of explaining the linear thermocompression bonding protrusions. [Figure 11] FIG. 11 is an explanatory diagram for explaining the process of forming a linear heat-sealed portion in a laminated paper manufacturing apparatus according to a fifth embodiment of the present invention, and is an explanatory diagram showing a heat seal roller portion from a side view. [Figure 12] Figure 12 is an explanatory diagram for explaining the process of forming a linear heat-sealed portion in a laminated paper manufacturing apparatus related to embodiment 5 of the present invention, and is an explanatory diagram showing a cross-section of the internal structure of a heat seal roller corresponding to Figure 11 cut at an end surface. [Figure 13]Figure 13 is an explanatory diagram showing the configuration of the linear thermocompression protrusions of the heat seal rollers of the laminated paper manufacturing apparatus of embodiment 5 of the present invention, where the upper figure is an oblique view showing a portion of a pair of heat seal rollers, the central figure is a cross-sectional view showing an enlarged cross-section of the circular portion indicated by the dotted line in the upper figure to explain the state in which the linear thermocompression protrusions of the pair of heat seal rollers mesh with each other to press the raw material sheet of the laminated paper, and the lower figure is a cross-sectional view showing an enlarged circular portion indicated by the dotted line at the center of the central figure to explain the shape of the linear thermocompression protrusions of the pair of heat seal rollers. [Figure 14] Figure 14 shows an example of a laminated paper according to embodiment 1 of the present invention, in which the width between linear heat-sealed portions is changed depending on the crepe rate, where (a) is an enlarged plan view of a portion of the laminated paper showing the case where the spacing (width) between adjacent linear heat-sealed portions is a first width corresponding to a first crepe rate, and (b) is an enlarged plan view of a portion of the laminated paper showing the case where the spacing (width) between adjacent linear heat-sealed portions is a second width corresponding to a second crepe rate. [Figure 15] Figure 15 is a graph for explaining a preferred specific example of a method for manufacturing laminated paper using a laminated paper manufacturing apparatus of embodiment 5 of the present invention, where (a) is an explanatory diagram showing the relationship between the feeding speed of the laminated paper raw material sheet by the laminated paper manufacturing apparatus and the thermal pressing temperature of the heat seal roller of the laminated paper manufacturing apparatus, (b) is an explanatory diagram showing the relationship between the thermal pressing temperature of the heat seal roller of the laminated paper manufacturing apparatus and the thickness of the base paper of the laminated paper raw material sheet (base paper thickness), (c) is an explanatory diagram showing the relationship between the feeding speed of the laminated paper raw material sheet by the laminated paper manufacturing apparatus and the base paper thickness of the laminated paper raw material sheet, and (d) is an explanatory diagram showing the relationship between the thermal pressing temperature of the heat seal roller of the laminated paper manufacturing apparatus and the thickness of the nonwoven fabric of the laminated paper raw material sheet (nonwoven fabric thickness). [Figure 16] FIG. 16 is a side view that shows a schematic diagram of a laminated paper manufacturing apparatus (high frequency perforation type laminated paper manufacturing apparatus) according to a sixth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, modes for carrying out the present invention (hereinafter, referred to as embodiments) will be described. Note that, throughout the embodiments, the same members, elements or portions are designated by the same reference numerals, and the description thereof will be omitted.

[0022] First embodiment (laminated paper having a printed portion provided on a nonwoven fabric) [Overall composition of laminated paper] The laminated paper of the first embodiment is embodied as a laminated paper 10 having a printed portion, as shown in Figs. 1 to 5. First, the overall structure 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 is formed in a sheet shape having a predetermined outer contour (typically a rectangular shape such as a rectangle). On the other hand, in a 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 a laminated structure made up of crepe paper 1 as an outer layer sheet constituting a pair of outer layers, and nonwoven fabric 2 as an intermediate layer sheet constituting an intermediate layer interposed between the pair of outer layers. The laminated paper 10 maintains the laminated structure by heat-sealing one and the other of the pair of crepe papers 1 to one and the other of the nonwoven fabric 2 at the same locations, respectively. In other words, the laminated paper 10 is heat-sealed to the nonwoven fabric 2 at the same locations by heat-sealing a pair of crepe papers 1 to the nonwoven fabric 2 at each of the first heat-sealing portion 11a and the second heat-sealing portion 11b that respectively constitute the heat-sealing portion row 11 (the first heat-sealing portion row 11A and the second heat-sealing portion row 11B).

[0023] [Heat-sealing part] To explain the heat-sealed portion 11 in detail, the laminated paper 10 has a single row of heat-sealed portions 11 formed in a broken line shape so as to extend over the entire length direction of the laminated paper 10 (the direction in which the base paper is fed during production, the vertical direction in FIG. 1). The laminated paper 10 also has multiple rows of heat-sealed portions 11 continuously arranged in parallel over the entire width direction of the laminated paper 10 (the direction perpendicular to the direction in which the base paper is fed during production, the horizontal direction in FIG. 1) so as to be parallel to each other at regular intervals. As a result, the laminated paper 10 has linear band-like non-sealed portions 12 between adjacent rows of heat-sealed portions 11. That is, the laminated paper 10 has multiple rows of non-sealed portions 12 continuously arranged in parallel over the entire width direction so as to be parallel to each other at regular intervals. In the laminated paper 10, the multiple rows of heat-sealed portions 11 are composed of a first row of heat-sealed portions 11A, which are formed by arranging first heat-sealed portions 11a in a straight line at regular intervals in the length direction of the laminated paper 10, and a second row of heat-sealed portions 11B, which are formed by arranging second heat-sealed portions 11b in a straight line at regular intervals in the length direction of the laminated paper 10. That is, the first row of heat-sealed portions 11A, which is formed by the first heat-sealed portions 11a, and the second row of heat-sealed portions 11B, which is formed by the second heat-sealed portions 11b, are alternately arranged in parallel at regular intervals in the width direction of the laminated paper 10. 2, the first heat-sealed portion 11a constitutes a straight line segment-like fused portion having a predetermined length and a predetermined width in the laminated paper 10, and the first heat-sealed portions 11a of a constant length and width are linearly arranged at constant intervals in the length direction to form a first row of heat-sealed portions 11A in a broken line shape. The second heat-sealed portions 11b constitute straight line segment-like fused portions of the same length and width as the first heat-sealed portions 11a, and the second heat-sealed portions 11b of a constant length and width are linearly arranged at constant intervals in the length direction to form a second row of heat-sealed portions 11B in a broken line shape similar to the first row of heat-sealed portions 11A.The first heat-sealed portion 11a of the first row of heat-sealed portion rows 11A and the second heat-sealed portion 11b of the second row of heat-sealed portion rows 11B (i.e., adjacent rows of heat-sealed portion rows 11A and 11B) are positioned such that their positions in the longitudinal direction of the laminated paper 10 are offset from each other so that the longitudinal center position of the first heat-sealed portion 11a of the first row of heat-sealed portion rows 11A is located at the middle position of the gap between adjacent second heat-sealed portions 11b of the second row of heat-sealed portion rows 11B.

[0024] [Non-fused area] As shown in Fig. 4, the laminated paper 10 forms a non-fused portion 12 in the form of a straight band between two adjacent rows of heat-sealed portions 11, and this non-fused portion 12 expands to form an expanded portion after the laminated paper 10 absorbs water. In detail, as shown in Figs. 1 and 2, the non-fused portion 12 is composed of a wide expanded portion 12a (which will form the wide expanded portion after the laminated paper 10 absorbs water) and a narrow expanded portion 12b (which will form the narrow expanded portion after the laminated paper 10 absorbs water). More specifically, the wide expanded portion 12a is provided in the laminated paper 10 in a range (non-overlapping range) where the adjacent first row of heat-sealed portion rows 11A and second row of heat-sealed portion rows 11B do not overlap, 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 provided in a substantially rectangular shape in the longitudinal middle portion where the first heat-sealed portion 11a of the first row of heat-sealed portion rows 11A (the second row from the left) and the second heat-sealed portion 11b of the second row of heat-sealed portion rows 11B (the third row from the left) do not overlap with each other, over the length range between the ends (between one end and the other end) of the first heat-sealed portion 11a adjacent vertically in the first row of heat-sealed portion rows 11A, and over the width range from the right edge of the first row of heat-sealed portion rows 11A to the left edge of another first row of heat-sealed portion rows 11A (the first row of heat-sealed portion rows 11A (the fourth row from the left in FIG. 2)) that faces the second row of heat-sealed portion rows 11B. On the other hand, the narrow expansion portions 12b are provided in the laminated paper 10 in the area (overlapping area) where adjacent first and second rows of heat-sealed portions 11A and 11A overlap, as small, approximately rectangular portions having the length and width of the overlapping area. For example, in FIG. 2, the narrow expansion portion 12b is provided in a substantially rectangular shape in the range of the longitudinal ends where the first heat-sealed portion 11a of the first row of heat-sealed portion rows 11A (the second row from the left) and the second heat-sealed portion 11b of the second row of heat-sealed portion rows 11B (the third row from the left) overlap, over a length range from one end (e.g., the upper end) of the first heat-sealed portion 11a of the first row of heat-sealed portion rows 11A to the other end (lower end) of the second heat-sealed portion 11b of the adjacent second row of heat-sealed portion rows 11B, and over a width range from the right edge of the first row of heat-sealed portion rows 11A to the left edge of the second row of heat-sealed portion rows 11B.

[0025] [Wrinkles in non-fused areas (expanded areas)] In the laminated paper 10, the non-fused portion 12 is not bonded at all between the crepe paper 1 of the outer layer and the nonwoven fabric 2 of the middle layer, and the non-fused portion 12 of the crepe paper 1 is free to move and deform in the thickness direction, etc., relative to the nonwoven fabric 2 as a portion not restrained by the heat-fused portions 11a, 11b of the heat-fused portion row 11 (i.e., a portion not fixed to the nonwoven fabric 2). In particular, the amount of movement of the crepe paper 1 is relatively small in the portion of the non-fused portion 12 close to the heat-fused portion row 11 (i.e., the boundary portion with the heat-fused portion row 11), but the amount of movement of the crepe paper 1 is relatively large in the portion of the non-fused portion 12 that is farther away from the heat-fused portion row 11 (i.e., the central portion between adjacent heat-fused portion rows 11), and the amount of movement of the crepe paper 1 is maximum at the central position between adjacent heat-fused portion rows 11. Furthermore, in the laminated paper 10, in each of the non-fused portions 12 (i.e., each of the wide expanded portions 12a and each of the narrow expanded portions 12b) of the crepe paper 1 that constitutes the two outer layers, numerous crepe wrinkles that are inherent small wrinkles of the crepe paper 1 appear before the laminated paper 10 is initially hydrated. These crepe wrinkles are small wrinkles that extend in the width direction of the laminated paper 10 (and in the width direction of the crepe paper 1) and are formed during the manufacture of the crepe paper 1.

[0026] On the other hand, after the laminated paper 10 is initially moistened, in each of the non-fused portions 12 (wide expanded portion 12a and narrow expanded portion 12b) of the crepe paper 1, the crepe paper 1 expands through the crepe wrinkles, i.e., the small crepe wrinkles expand with moisture, forming wrinkles (wrinkles larger than the crepe wrinkles, hereinafter referred to as "expansion wrinkles") different from the original crepe wrinkles of the crepe paper 1, as shown in Fig. 2. In this case, in the crepe paper 1, adjacent crepe wrinkles expand with moisture and become integrated, forming one expansion wrinkle equivalent to the multiple crepe wrinkles, and it can be considered that in the expansion wrinkle portion, all or part of the crepe wrinkles that were the source of the expansion wrinkles disappear. In addition, the crepe paper 1 has large wrinkles (hereinafter referred to as "large expansion wrinkles") in the wide expanded portion 12a that extend across almost the entire width of the wide expanded portion 12a, and has medium-sized wrinkles (hereinafter referred to as "medium expansion wrinkles") in the narrow expanded portion 12b that extend across almost the entire width of the narrow expanded portion 12b, with both the large expansion wrinkles and the medium expansion wrinkles being larger than the crepe wrinkles. FIG. 14 shows examples of the large expansion wrinkles 12aw and the medium expansion wrinkles 12bw. Furthermore, in the non-fused portion 12 of the crepe paper 1, not all the crepe wrinkles are transformed into the large expansion wrinkles or medium expansion wrinkles, and some of the crepe wrinkles remain in the crepe paper 1 as they are (in the original small wrinkle state). In addition, the inventor has found that there are two types of large expansion wrinkles in the wide expanded portion 12a in the non-fused portion 12 of the crepe paper 1 in the laminated paper 10. That is, the inventor has found that there are a first type of large expansion wrinkles in which some of the crepe wrinkles do not disappear and remain together with the large expansion wrinkles (i.e., are mixed) (hereinafter referred to as "mixed large and small wrinkles"), and a second type of large expansion wrinkles in which the crepe wrinkles have completely disappeared (hereinafter referred to as "complete large wrinkles"). Similarly, the inventor has found that there are two types of medium expansion wrinkles in the narrow expanded portion 12b in the non-fused portion 12 of the crepe paper 1 in the laminated paper 10. That is, the inventors have determined that the expanded wrinkles are a first type of expanded wrinkles in which some of the crepe wrinkles do not disappear and remain (i.e., are mixed) with the expanded wrinkles (hereinafter referred to as "mixed small and medium wrinkles").It has been found that there are two types of expanded medium wrinkles (hereinafter referred to as "complete medium wrinkles") in which the crepe wrinkles have completely disappeared, and a second type of expanded medium wrinkles (hereinafter referred to as "complete medium wrinkles") in which the crepe wrinkles have completely disappeared. Furthermore, in the crepe paper 1, these expanded large wrinkles, expanded medium wrinkles, mixed large and small wrinkles, mixed medium and small wrinkles, complete large wrinkles, and complete medium wrinkles basically remain in their original state in the crepe paper 1 even after the laminated paper 10 is dried after absorbing water.

[0027] As a result, in the laminated paper 10 after hydration, both when it is hydrating and when it is dried after hydration, the expanded large wrinkles, expanded medium wrinkles, mixed large and small wrinkles, mixed medium and small wrinkles, complete large wrinkles, and complete medium wrinkles are mixed together, and in particular, sets of expanded large wrinkles, mixed large and small wrinkles, and complete large wrinkles, as well as sets of expanded medium wrinkles, mixed medium and small wrinkles, and complete medium wrinkles are alternately present in the wide expanded section 12a and the narrow expanded section 12b, respectively, thereby providing the unique effect of increasing the sense of volume in a balanced manner across both sides of the laminated paper 10.

[0028] [Dimensions of heat-sealed parts and spacing between heat-sealed parts] In the laminated paper 10, each of the heat-sealed rows 11 is configured by arranging the first heat-sealed sections 11a, which are straight line segments of a certain length and width, in a broken line shape at a certain interval in the length direction, and by arranging the second heat-sealed sections 11b, which are straight line segments of a certain length and width, in a broken line shape at a certain interval in the length direction, with a position shifted from the first heat-sealed sections 11a (i.e., so that the middle position of each second heat-sealed section 11b coincides with the middle position of the interval between the first heat-sealed sections 11a). Also, since the first heat-sealed sections 11a and the second heat-sealed sections 11b are set to the same length and width, the first heat-sealed sections 11a and the second heat-sealed sections 11b have the same configuration, except for the fact that they are arranged with a position shift in the length direction as described above. Meanwhile, the length and width of the first heat-sealed portion 11a and the second heat-sealed portion 11b in the laminated paper 10 are set to a predetermined length and width. That is, the length and / or width of each of the first heat-sealed portion 11a and each of the second heat-sealed portions 11b are appropriately set according to the outer dimensions of one sheet of the laminated paper 10 when in use (i.e., appropriately set according to the vertical and horizontal dimensions determined according to the application of the laminated paper 10).

[0029] Specifically, for example, when the laminated paper 10 is used for paper towels, the length of each of the heat-sealed parts 11a, 11b is set to any value within the range of 35 mm to 45 mm, preferably within the range of 38 mm to 42 mm, and more preferably to a value of about 40 mm. The width of each of the heat-sealed parts 11a, 11b is set to any value within the range of 1.5 mm to 2.5 mm, and preferably to a value of about 2 mm. The length-to-width ratio (aspect ratio) of each of the heat-sealed parts 11a, 11b is preferably set to any ratio within the range of 13:1 to 23:1, and more preferably to about 20:1. That is, it is preferable that the width of each of the heat-sealed parts 11a, 11b is set to about 5% of the length (or the length is set to about 20 times the width). Furthermore, in each row of heat-sealed portions 11 of the laminated paper 10, the interval between adjacent heat-sealed portions 11A, 11b in the length direction (hereinafter referred to as "heat-sealed portion interval in the length direction") is set to any value within the range of 18 mm to 22 mm, and is preferably set to a value of about 20 mm. The ratio of the length of each heat-sealed portion 11a, 11b to the heat-sealed portion interval is preferably set to 2:1. That is, it is preferable that the heat-sealed portion interval in the length direction of each row of heat-sealed portions 11 is set to about 50% of the length of the heat-sealed portions 11a, 11b (or the length of the heat-sealed portions 11a, 11b is set to about twice the heat-sealed portion interval). In this way, the integral bonding force between the crepe paper 1 and the nonwoven fabric 2 by the heat-sealed portion row 11 is well maintained, while the expansion rate of the crepe 1 by the non-fused portion 12 is maximized, and the volume of the laminated paper 10 can be maintained in the best state.

[0030] [End shape of heat-sealed part] Furthermore, each of the heat-sealed parts 11a, 11b has both ends in the length direction curved in a semicircular plane shape. This makes it possible to effectively prevent the crepe paper 1 from peeling off from the ends of the heat-sealed parts 11a, 11b to the nonwoven fabric 2, compared to when the ends of each heat-sealed part are rectangular (i.e., when the corners of the ends are right angles). As will be described later, in this case, both ends in the length direction of the heat-sealed surface of the heat-sealed protruding part of the heat-sealing roller constituting the heat-sealed part forming means in the laminated paper manufacturing device also have corresponding curved semicircular plane shapes. Therefore, compared to when the ends of each heat-sealed surface are rectangular (i.e., when the corners of the ends are right angles), the raw material sheet of the crepe paper 1 that receives the pressing force from the heat-sealed surface when the heat-sealed part is formed by the heat-sealed surface of the heat-sealing roller is not damaged by excessive pressure concentration at the ends of the heat-sealed surface, and the manufacturing yield can be improved and the quality of the laminated paper 10 can be improved. (That is, as described later, when the end of the thermo-compression surface forms a right-angled corner, stress is concentrated in the raw material sheet of the crepe paper 1 at the corner, and the raw material sheet is more likely to break at the corner than when the thermo-compression surface has a curved shape.)

[0031] [Crepe rate of crepe paper] In the laminated paper 10, the crepe rate of the crepe paper 1 is set to any value within the range of 20% to 40%, preferably any value within the range of 20% to 30%, and more preferably set to a value of about 30%. In other words, if the crepe rate of the crepe paper 1 is less than 20%, there is a high possibility that the crepe paper 1 will not expand or swell sufficiently when the laminated paper 10 absorbs water after being laminated and joined to the nonwoven fabric 2 to form the laminated paper 10. On the other hand, if the crepe rate of the crepe 1 is more than 40%, it will be difficult to make the raw material sheet of the crepe paper 1 using a papermaking machine during production (i.e., during papermaking) of the raw material sheet.

[0032] [Crepe rate of crepe paper and spacing of heat-sealed parts] 14, the arrangement intervals LW1, LW2 of the heat-sealed portion rows 11 in the laminated paper 10 (i.e., the interval between the widthwise centerlines of adjacent heat-sealed portion rows 11, hereinafter referred to as "widthwise heat-sealed portion interval") are set to any value within a predetermined range according to the range of the crepe rate of the crepe paper 1. Specifically, when the crepe rate of the crepe paper 1 is within a range of 20% to 26%, the widthwise heat-sealed portion interval is preferably set to any value within a range of 10 mm to 15 mm as the first widthwise heat-sealed portion interval LW1 (which is a relatively small dimension) (i.e., the lower limit is preferably 10 mm and the upper limit is preferably 15 mm), and the widthwise heat-sealed portion interval is preferably increased in proportion to the increase in the crepe rate within this widthwise heat-sealed portion interval range. Furthermore, when the crepe rate of the crepe paper 1 is within the range of 26% to 30%, the widthwise heat-sealed part spacing is preferably set as the second widthwise heat-sealed part spacing LW2 (which is a relatively large dimension) to any value within the range of 15 to 25 mm (i.e., the lower limit is preferably 15 mm and the upper limit is preferably 25 mm), and within this widthwise heat-sealed part spacing range, it is preferable to increase the widthwise heat-sealed part spacing in proportion to the increase in the crepe rate. If the widthwise heat-sealed part spacings LW1, LW2 in the laminated paper 10 are smaller than the lower limit values, there is a high possibility that the crepe paper 1 will not expand or swell sufficiently when the laminated paper 10 absorbs water. On the other hand, if the widthwise heat-sealed portion spacings LW1, LW2 in the laminated paper 10 are greater than the upper limit, the large expanded wrinkles and medium expanded wrinkles, etc. will expand or elongate more than the desired expansion rate when the laminated paper 10 absorbs water, causing the large expanded wrinkles and medium expanded wrinkles, etc. to slacken, which may reduce the quality of the laminated paper 10. For example, the inventors have confirmed through experiments that if the widthwise heat-sealed portion spacings LW1, LW2 in the laminated paper 10 are 30 mm or more (i.e., a value significantly exceeding 25 mm, specifically, a value that is 125% or more of 25 mm), the large expanded wrinkles and medium expanded wrinkles, etc. will expand or elongate too much when the laminated paper 10 absorbs water, causing them to slacken.In other words, even if the crepe rate of the crepe paper 1 is 30%, which is the maximum value of the above range, if the widthwise heat-sealed portion spacing LW1, LW2 in the laminated paper 10 is 30 mm or more, when the laminated paper 10 absorbs water, the large expanded wrinkles, medium expanded wrinkles, etc. will expand or stretch too much and become slack when the laminated paper 10 absorbs water.

[0033] [Pattern part as printing part] As shown in FIG. 1, the laminated paper 10 can be embodied as a laminated paper 10 having a pattern section 13 as a first specific example of a printed section. In detail, the pattern section 13 can be configured by arranging unit patterns 13a and 13b of the same motif over the entire surface or a certain area of ​​the laminated paper 10, as shown in FIG. 2. In FIG. 2, for example, the unit pattern 13a is a pattern of a predetermined size with a motif of a corolla (a collection of petals) of a predetermined type of flower, while the unit pattern 13b is a pattern of a larger size than the unit pattern 13a with the same corolla motif as the unit pattern 13a. The configuration of the pattern section 13 is not limited to that shown in FIG. 2, and can be configured using any pattern. That is, the pattern section 13 can use unit patterns of motifs different from the unit patterns 13a and 13b in FIG. 2, and can be any pattern formed by combining unit patterns of various motifs other than the one using unit patterns of the same motif. Alternatively, the pattern portion 13 may be configured to use a pattern consisting of repeated designs, such as a lattice pattern or a checkerboard pattern, in addition to the configuration using individual unit patterns as shown in FIG. 2. Alternatively, the pattern portion 13 may be configured to use a monochromatic pattern (all-over monochromatic pattern) formed by printing an arbitrary monochromatic 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, or a monochromatic pattern (partial monochromatic pattern) formed by printing an arbitrary monochromatic color different from the original base color of the laminated paper 10 on a partial area of ​​the laminated paper 10. Alternatively, the pattern portion 13 may be configured to use a pattern formed by randomly printing two or more different colors on the entire surface or a partial area of ​​the laminated paper 10 (hereinafter referred to as a "multiple-color pattern"). In short, the pattern portion 13 may be configured in any way as long as it can impart a distinct visual effect to the laminated paper 10 by printing an arbitrary color different from the base color of the ordinary laminated paper 10 on the laminated paper 10.

[0034] [Advertising department as a printing department] Also, as shown in FIG. 3, the laminated paper 10 can be embodied as a laminated paper 10 having an advertising section 14 as a second specific example of a printing section. In detail, the advertising section 14 can be configured to have, for example, an advertising space 14b and an advertising space 14c in the inner range of the outer frame 14a. In this case, the advertising section 14 can be configured to print, for example, a title or copy of a specific advertising content in the advertising space 14b, and print details of the advertising content (such as a product description or a picture corresponding to the product) in the advertising space 14c. In FIG. 3, the outer frame 14a, the advertising space 14b, and the advertising space 14c of the advertising section 14 are each drawn with a dashed line, but this is merely a way to explain the ranges of the outer frame 14a, the advertising space 14b, and the advertising space 14c, and (although it is of course possible to draw them intentionally) the outer lines of the outer frame 14a, the advertising space 14b, and the advertising space 14c are not usually drawn on the laminated paper 10. In addition, the outer frame 14a of the advertising section 14 is provided for convenience to show an example of the advertising content, and it is also possible to embody all of the advertising frames 14a and 14b without providing the outer frame 14a. The number of the advertising frames 14a and 14b can also be one frame or any number of frames of two or more frames. Furthermore, the configuration of the advertising section 14 is not limited to that shown in FIG. 2, and can be any configuration. That is, the advertising section 14 can be configured as any advertising content or content printed in any expression mode or expression format as long as it is advertising content printed on advertising print media such as ordinary flyers and promotional items. In addition, the content or content printed on the advertising section 14 can be any content such as a company name, logo, brand, etc. Furthermore, the laminated paper 10 with a printed portion can be used for novelty goods such as paper towels that are distributed in large quantities for the purpose of announcing or advertising various information, such as sales information at retail stores or campaign information at companies, or for novelty goods such as paper towels that are distributed in large quantities for the purpose of announcing or publicizing various events (festivals) such as the Olympics or expositions.

[0035] [Printing section structure] Next, the structure of the printed part of the laminated paper 10 will be described. As shown in the specific examples of Figures 5, 6, 7, and 8, one of the main features of the laminated paper 10 is that a printed part is printed using a predetermined printing ink on one surface other than the outer surface of the crepe paper 1 as an outer layer sheet, which is disposed inside the laminated paper 10. In addition to this, another main feature of the laminated paper 10 is that the thickness (basis weight) of at least the crepe paper 1 as the outer layer sheet on the side on which the printed part is provided is set, and if necessary, the material (paper quality) is also set together with the thickness, so that the printed part can be seen from the outside through the crepe paper 1 as the outer layer sheet of the laminated paper 10 even when the laminated paper 10 is dry, and the visibility from the outside increases as the degree of transmission of the printed part through the crepe paper 1 as the outer layer sheet increases when the laminated paper 10 absorbs water. Specifically, in embodiment 1, the laminated paper 10 has a multi-layer structure (a multi-layer structure of three or more layers) consisting of a pair of crepe papers 1 as outer layers and one or more sheets of nonwoven fabric 2 arranged in a laminated state between the pair of crepe papers 1, and is characterized in that the printed portion is provided on the inner surface (i.e., the inner surface of the laminated paper 10) of the nonwoven fabric 2 facing one of the crepe papers 1 as the outer layer sheets, and the crepe paper 1 is bonded to the nonwoven fabric 2 by heat fusion and pressure bonding using the heat fusion portion 1.

[0036] [Printed area on nonwoven fabric] For example, as shown in Fig. 5, the printed portion is composed of a printed 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 made of a material capable of printing the printed portion, and the printed portion is configured by providing a desired pattern portion 13 or advertisement portion 14 by printing on one surface of the nonwoven fabric 2 using a predetermined printing ink. Note that, for the sake of convenience of explanation, the printed layer 2a is depicted as a thin layer on one surface of the nonwoven fabric 2 in Fig. 5, but in reality, the printing ink constituting the printed layer 2a permeates into the nonwoven fabric 2 from one surface during printing to form a predetermined pattern or the like of the printed portion. Therefore, the printing ink may completely permeate into the nonwoven fabric 2 and no layer of the printing ink may be formed on one surface of the nonwoven fabric 2. Alternatively, a portion of the printing ink may permeate into the nonwoven fabric 2, while the remaining layer of the printing ink may be formed on one surface of the nonwoven fabric 2. Also, after the printing ink has completely permeated the interior of the nonwoven fabric 2, it may be exposed from the other side of the nonwoven fabric 2, and a layer of printing ink may be formed on the other side of the nonwoven fabric 2 as well. In either case, the printed portion of the laminated paper 10 is drawn with the highest density on one side of the nonwoven fabric 2, which is the printed surface, and is visible as the printed layer 2a. In other words, the pattern portion 13 and advertising portion 14 of the various laminated papers 10 described above are provided by printing on one side of the nonwoven fabric 2 using any printing ink and any printing method in accordance with the pattern configuration, advertising content, etc.

[0037] [Printing layer composition (printing ink and printing method)] Here, the printed layer 2a of the printed part of the laminated paper 10 is formed on one side of the nonwoven fabric 2 by any printing method using any printing ink, but preferably, the printed part is formed using flexographic printing technology as the printing method, and also using water-based ink or UV (ultraviolet ray curing) ink as the printing ink. In detail, flexographic printing is a type of direct transfer type relief printing, using rubber or synthetic resin as the plate material and liquid ink consisting of water-based ink or UV ink as the printing ink, but the printed layer 2a of the printed part of the laminated paper 10 is formed by printing a predetermined pattern part 13 or advertisement part 14 on one side of the nonwoven fabric 2 after adjusting the concentration of the water-based ink or UV ink. The laminated paper 10 is formed by sandwiching the nonwoven fabric 2 having the printed part between a pair of crepe papers 1 and integrating them by heat fusion with each other by the heat fusion part row 11. Even if the printing target of the printed portion of this laminated paper 10 is a nonwoven fabric 2 having a finely uneven surface, the desired pattern portion 13 or advertisement portion 14 can be clearly printed as the printed portion by using a plate having elasticity and shape-following properties of flexographic printing. As a result, in the laminated paper 10 manufactured using the nonwoven fabric 2 having the printed portion, the printed portion can be visually recognized with good print quality from the outside through the crepe paper 1, especially in a wet state. In addition, since the printing ink of the printed portion of the nonwoven fabric 2 of this laminated paper 10 is made of water-based ink or UV ink, the printing ink does not contain organic solvent. As a result, the laminated paper 10 manufactured using the nonwoven fabric 2 having the printed portion is not affected by the volatilization of organic solvents, unlike printing inks using organic solvents, and is a product that is friendly to users and the environment, especially when applied to sanitary products such as paper towels. In addition, in printing the laminated paper 10 on the nonwoven fabric 2, for example, a flexographic printing machine capable of printing up to seven colors is used, and the concentration of the printing ink of each color is adjusted.

[0038] [Nonwoven fabric material] On the other hand, in the laminated paper 10 according to embodiment 1 shown in Fig. 5, the nonwoven fabric 2 as the intermediate layer sheet is made of a material on which the printed portion can be printed, and the crepe paper as the outer layer sheet is made of a nonwoven fabric of a material that can be reliably heat-sealed and bonded at the linear heat-sealing portion. This makes it possible to provide a pattern portion 13 and / or an advertising portion 14 by printing on one side of the nonwoven fabric 2 that will be placed on one side of the laminated paper 10 (typically, when the laminated paper 10 is used in a paper towel, this is the one side of the laminated paper that is exposed on the outer surface of the paper towel, i.e., the front side of the paper towel), and the crepe paper 1 that forms a pair of outer layers can be favorably bonded to both sides of the nonwoven fabric 2 to form the laminated paper 10 with a multi-layer structure (a three-layer structure in the case of Fig. 5).

[0039] [Thickness of nonwoven fabric] Furthermore, in the laminated paper 10, as described above, the nonwoven fabric 2 serving as the intermediate layer sheet must be made of a material that has both the printability to allow printing of the printed portion and the heat-sealing ability to allow the crepe paper to be heat-sealed, and in order to provide both the printability and heat-sealing properties, it is preferable to use a nonwoven fabric having a thickness of any value within a specified range. Specifically, for example, conventional nonwoven fabric paper towels use a sheet-shaped nonwoven fabric with a basis weight of 45 to 70 g / cm2 as the raw material sheet. On the other hand, the laminated paper 10 of the present embodiment uses a pair of crepe paper 1 and nonwoven fabric 2 as the raw material sheets, and also uses a nonwoven fabric 2 with a basis weight of 15 to 25 g / m2. 2 It is preferable to use a nonwoven fabric having a thickness within the range of 18 to 22 g / m 2 It is more preferable that the thickness is within the range of 18 to 20 g / m 2 It is more preferable that the thickness of the sheet is within the range of 20 g / m 2 That is, in the laminated paper 10, the thickness of the nonwoven fabric 2 is most preferably 25 g / m2. 2 If the thickness of the nonwoven fabric 2 is greater than 25 g / m2, the laminated paper 10 may lack flexibility, and for example, when the laminated paper 10 is used as a paper towel, the laminated paper 10 may feel hard to the touch. 2If it is larger than this, the strength will be higher than necessary, which will cause unnecessary cost increases. Furthermore, during the manufacturing process of the laminated paper 10, for example, in the process of heat-sealing the crepe paper 1 to the nonwoven fabric 2 by a pair of heat-seal rollers, when heat is transferred from the heat-seal roller having a heat source to the nonwoven fabric 2 via one of the crepe papers 1, the efficiency of heat transfer decreases as the thickness of the nonwoven fabric 2 increases, so that even if heat-sealing between one of the crepe papers 1 and one side of the nonwoven fabric 2 is performed well, heat-sealing between the other crepe paper 1 and the other side of the nonwoven fabric may not be performed sufficiently, and the adhesive strength of the nonwoven fabric 2 to the other crepe paper 1 may be insufficient. On the other hand, when the thickness of the nonwoven fabric 2 is 15 g / m2 or less, the adhesive strength of the nonwoven fabric 2 to the other crepe paper 1 may be insufficient. 2 If it is smaller than this, the amount of thermoplastic resin, which is the material contained in the nonwoven fabric 2 for expressing the thermal adhesion force, will be relatively reduced, and there is a possibility that sufficient thermal adhesion force will not be obtained when the crepe paper 1 is thermally adhered to both sides of the nonwoven fabric 2. In addition, the overall stiffness of the laminated paper 10 will be weakened, which may have an adverse effect on the user's experience of using the laminated paper 10, for example, when the laminated paper 10 is used for paper hand towels, etc.

[0040] [Nonwoven fabric raw fiber] Furthermore, in order to provide both the printability and heat fusion property as described above, the nonwoven fabric 2 may have a thickness within the above-mentioned range, particularly when the thickness is set to a value on the lower limit side of the above-mentioned range (for example, when the thickness is set to a basis weight of 15 g / m 2 , basis weight 18g / m 2When the thickness of the nonwoven fabric 2 is relatively small (i.e., when the thickness is on the lower limit side of the above-mentioned predetermined range), it is preferable to use a nonwoven fabric made of core-sheath composite fibers. That is, when the thickness of the nonwoven fabric 2 is relatively small (i.e., when the thickness is on the lower limit side of the above-mentioned predetermined range), there is a high possibility that the overall stiffness of the laminated paper 10 will be weakened if a nonwoven fabric with such a relatively small thickness is used, but by using a nonwoven fabric made of core-sheath composite fibers, when the crepe paper 1 is heat-sealed to the nonwoven fabric 2, the sheath of the core-sheath composite fibers softens or melts at a predetermined heating temperature and exerts adhesive strength due to heat fusion to the crepe paper 1, while the core of the core-sheath composite fibers does not soften or melt and remains as it is, maintaining the strength and stiffness of the nonwoven fabric 2 itself, so that the strength and stiffness of the entire laminated paper 10 can be maintained in the end, and the volume of the laminated paper 10 can be maintained even with a thin nonwoven fabric 2.

[0041] [Thickness of crepe paper] In the laminated paper 10, the crepe paper 1 has a thickness within a predetermined range to achieve a predetermined transmittance (transmittance). Specifically, the thickness of one of the crepe papers 1, which is superimposed and joined to one surface of the nonwoven fabric 2 (i.e., the surface on which the printed portion is provided), is set to have a transmittance such that at least a part of the printed portion of the nonwoven fabric 2 is visible through the crepe paper 1 when the laminated paper 10 is in a dry state (or a transmittance such that at least a part of the printed portion of the nonwoven fabric 2 is visible in a semi-transparent state), and at least a transmittance such that the entire printed portion of the nonwoven fabric 2 is clearly visible through the crepe paper 1 when the laminated paper 10 is in a wet state due to water absorption (or a transmittance such that the entire printed portion of the nonwoven fabric 2 is visible in a substantially transparent state). On the other hand, the other crepe paper 1, which is superimposed and joined to the other surface of the nonwoven fabric 2, is usually set to the same thickness as the one of the crepe papers 1, but may be set to a different thickness. Even if the other crepe paper 1 is made to be the same thickness as one of the crepe papers 1, so long as the thickness of the nonwoven fabric 2 is within the above-mentioned specified range, when the laminated paper 10 is in a dry state, at least a portion of the printed portion of the nonwoven fabric 2 will still be visible through the other crepe paper 1 (although less clearly than the side of one of the crepe papers 1), and when the laminated paper 10 is in a wet state due to its water content, the entire printed portion of the nonwoven fabric 2 will be visible through the other crepe paper 1 with a certain degree of clarity (although less clearly than the side of one of the crepe papers 1). In any case, in the laminated paper 10, the crepe paper 1 is set to a thickness of any value within a specified range to achieve a specified light transmittance (synonymous with light transmittance, hereinafter simply referred to as "transmittance").This produces the unique effect that, when the laminated paper 10 is in a dry state, at least a portion of the printed portion of the nonwoven fabric 2 can be seen through the crepe paper 1, whether viewed from one crepe paper 1 side or the other crepe paper side, and, when the laminated paper 10 is in a wet state due to its water content, the entire printed portion of the nonwoven fabric 2 can be seen clearly, to varying degrees, through the crepe paper 1.

[0042] In detail, in the laminated paper 10, the thickness of the crepe paper 1 is 20 to 50 g / m 2 and more preferably, 20 to 40 g / m 2and more preferably, 30 to 40 g / m 2 and more preferably, 30 to 35 g / m 2 and more preferably, 30 to 33 g / m 2 Any value within the range of 33 to 35 g / m 2 and most preferably about 33 g / m 2 or approximately 35 g / m 2 For example, the thickness of the crepe paper 1 is set to a value of 35 g / m 2 , 27g / m 2 , or 23 g / m 2 The inventors have conducted extensive research into the relationship between the crepe wrinkles of the crepe paper 1 and the thickness of the crepe paper 1, and have found that if the thickness of the crepe paper 1 is outside the above range, the desired physical properties required of the crepe paper 1 of the laminated paper 10 cannot be ensured. 2 In the following, we have found that when manufacturing crepe paper 1 using a crepe paper manufacturing device, if the feed speed of the raw sheet of crepe paper 1 (paper sheet in a state where the crepe is not formed) is increased, it is not possible to form a crepe on the raw sheet. On the other hand, when the thickness of the crepe paper 1 is 50 g / m2 in basis weight, 2 If this temperature exceeds 100° C., when attempting to form laminated paper 10 by laminating crepe paper 1 on nonwoven fabric 2 and heat-sealing it to nonwoven fabric 2 at heat-sealing section 11, the heat from the bonding surface of the heat seal roller will be blocked by the thick crepe paper 1 and will not fully reach nonwoven fabric 2, and the thermoplastic resin acting as the adhesive for nonwoven fabric 2 will not melt sufficiently, failing to exhibit the desired adhesive strength to crepe paper 1, and it is possible that crepe paper 1 will not be able to adhere to nonwoven fabric 2.

[0043] In addition, the thickness of the crepe paper 1 is 40 g / m 2 If the thickness exceeds 40 g / m, the feed speed of the raw material sheet must be extremely slowed down during the production of the crepe paper by the crepe paper production device, which may result in a decrease in production efficiency. From this point of view, the upper limit of the thickness of the crepe paper 1 is set to 40 g / m.2 It is preferable that the thickness of the crepe paper 1 is 35 g / m2 in terms of basis weight. 2 If the thickness of the crepe paper 1 exceeds 35 g / m, even if the feed speed of the raw material sheet is slowed down during production by the crepe paper production device, the production of the crepe paper itself may become difficult depending on the performance of the crepe paper production device. From this point of view, the upper limit of the thickness of the crepe paper 1 is set to 35 g / m. 2 It is preferable to set the above.

[0044] [Total thickness of laminated paper (total thickness of crepe paper and nonwoven fabric)] As described above, the crepe paper 1 and nonwoven fabric 2, which are components of the laminated paper 10, are each configured to have a thickness of any value within a predetermined range, and the overall thickness of the laminated paper 10 is determined by the thickness of the crepe paper 1 and the thickness of the nonwoven fabric 2. Preferably, the overall thickness of the laminated paper 10 is determined by the thickness of each crepe paper 1 being 35 g / m2 in basis weight. 2 The thickness of the nonwoven fabric 2 is 20 g / m 2 This makes the overall thickness (35+20+35=) 90g / m 2 It is most preferable to set the thickness of the crepe paper 1 to this value (35 g / m 2 ) and the thickness of the nonwoven fabric 2 is set to this value (20 g / m 2 ), and the total thickness of the laminated paper 10 is set to this value (90 g / m 2 ), when the raw material sheet of the laminated paper 10 (i.e., a raw material sheet consisting of a pair of crepe paper raw material sheets with one nonwoven fabric raw material sheet sandwiched between them) is cut at a predetermined feeding position during the production of the laminated paper 10 (i.e., when the raw material sheet of the laminated paper 10 is cut to a predetermined length depending on the intended use), cutting can be performed most efficiently, thereby improving production efficiency and yield.

[0045] [Effect of laminated paper with printed area] In this way, the laminated paper 10 with the printed portion can achieve a unique design effect because the printed portion, such as the pattern portion 13 and the advertisement portion 14, has an appearance and looks as if it is half raised through the crepe paper 1. Specifically, when the laminated paper 10 is in a dry state, the transmittance (transparency) of the dry crepe paper 1 is relatively low, so the pattern and advertisement of the printed portion are in a blurred state through the crepe paper 1 but are still visible to some extent, but when the laminated paper 10 is in a wet state due to water absorption, the transmittance (transparency) of the moist crepe paper 1 is relatively high, so the pattern and advertisement of the printed portion are clearly visible through the crepe paper 1 and, due to the presence of the crepe paper 1, a unique effect is achieved in which the pattern and advertisement of the printed portion are clearly visible through the crepe paper 1 and are also seen as if they are raised from the laminated paper 10.

[0046] [Effect of printing on nonwoven fabric] Furthermore, as described above, the laminated paper 10 is configured as described above, and therefore can have a printed portion on which a pattern portion 13 or an advertisement portion 14 that has not been seen in the past is printed. Therefore, compared to, for example, conventional colored paper towels (paper towels colored entirely in a single color), which are simply colored raw fibers (such as pulp) of the raw material sheet for the towel, the laminated paper 10 becomes a product with a very rich design due to the pattern portion 13 and advertisement portion 14 as the printed portion. Furthermore, since the laminated paper 10 is formed by sandwiching the nonwoven fabric 2 with the printed portion between a pair of crepe papers 1, the pattern or advertisement of the printed portion gives a soft impression to the viewer when viewed 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 of the laminated paper 10, the laminated paper 10 as a sanitary paper product is usually provided to the user after absorbing water and becoming wet, and the user uses the wet laminated paper 10 to wipe off dirt and the like from his or her hands or parts of the body. In this case, it is necessary to prevent the printing ink in the printed portion of the laminated paper 10 from dissolving in moisture and eluting out from the crepe paper 1 and adhering to the user's hands or body. However, conventional colored paper towels are colored entirely with a single color of printing ink, and the printing ink is exposed on the surface of the colored paper towel. Therefore, conventional colored paper towels must use 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 when wet with water, and as mentioned above, the effects of volatile components of organic solvents cannot be denied.

[0047] On the other hand, in the laminated paper 10 of the present embodiment, as described above, the printed portion is formed on the nonwoven fabric 2 by using water-based ink or UV ink by using flexographic printing, and both sides of the nonwoven fabric 2 are completely covered by the crepe paper 1, so that the printing ink of the printed portion is not directly exposed on the surface of the laminated paper 10, and is always kept shielded by the crepe paper 1. Therefore, even when the laminated paper 10 is used in a wet state when it contains water, the printing ink does not come into direct contact with the user's hands or skin, despite the presence of the printed portion. This allows the laminated paper 10 to be provided as a safe and harmless laminated paper 10 for users, and also as an environmentally friendly laminated paper, and therefore has the advantage that it is not necessary to use organic solvent-type printing ink as in conventional colored paper towels. Note that the water-based ink used as the printing ink for the printed portion of the laminated paper 10 is preferably a pigment-type water-based ink, which effectively prevents the printing ink of the printed portion of the nonwoven fabric 2 from easily dissolving and eluting to the outside when the laminated paper 10 is in a wet state when it contains water.

[0048] [Manufacturing method of laminated paper with printed part (width dimension of nonwoven fabric raw material sheet)] Next, a method for manufacturing the laminated paper 10 having a printed portion will be described. In general, nonwoven fabrics are manufactured by manufacturing a web (also called fleece) from a predetermined raw fiber material consisting of natural fibers (pulp) or synthetic fibers by a predetermined web forming method such as a dry method, a wet method, or a spunbonding method, and bonding the fibers of the web by a predetermined bonding method such as a chemical bonding method, a thermal bonding method, a needle punching method, or a hydroentanglement method. Meanwhile, in the laminated paper 10 of this embodiment, it is preferable to use a nonwoven fabric made of the core-sheath structure composite fiber as the nonwoven fabric 2, and further, it is more preferable to use a nonwoven fabric manufactured by bonding the fibers by the air-through method, which is a type of the thermal bonding method, as the nonwoven fabric 2 (hereinafter, for convenience of explanation, referred to as an "air-through nonwoven fabric"). This air-through nonwoven fabric has the advantages of being highly extensible and flexible, giving the user a soft feel and a pleasant texture, and also enabling the crepe paper 1 to exhibit good adhesive strength when it is heat-sealed as the nonwoven fabric 2. Details will be described later in the section on the laminated paper manufacturing apparatus and the laminated paper manufacturing method, but in the manufacture of the laminated paper 10, a raw sheet of nonwoven fabric 2 (hereinafter referred to as the "nonwoven fabric raw sheet") is sandwiched between a pair of raw sheets of crepe paper 1 (hereinafter referred to as the "crepe paper raw sheet") to form a three-layered (three-ply) raw sheet (hereinafter referred to as the "laminate raw sheet"). Then, the laminated raw sheet is fed between a pair of heat seal rollers, for example, and the pair of crepe paper raw sheets are heat-sealed to the nonwoven fabric raw sheet by the pair of heat seal rollers to integrate them, thereby producing the final laminated paper. In this case, the crepe paper raw material sheet and the nonwoven fabric raw material sheet usually have a width dimension (for example, a width dimension of 1200 mm) that is the same as a predetermined width. In particular, if the width dimension of the nonwoven fabric raw material sheet is smaller than the width dimension of the crepe paper raw material sheet, there will be portions at the width direction ends of the laminated raw material sheet that cannot be thermally fused to the nonwoven fabric raw material sheet, so it is not preferable for the width dimension of the nonwoven fabric raw material sheet to be smaller than the width dimension of the crepe paper raw material sheet.

[0049] [Setting the width direction dimension of the nonwoven fabric raw material sheet according to the material of the nonwoven fabric] On the other hand, when providing a printing portion on the nonwoven fabric 2 as described above, the nonwoven fabric raw material sheet is fed to a predetermined printing device in advance to print the predetermined printing portion on the raw material sheet, but the present inventors have found that when the air-through nonwoven fabric is used as the nonwoven fabric, the nonwoven fabric raw material sheet shrinks due to heat during printing, which is believed to be due to its high elasticity. As a result of continuing intensive research into an invention for a laminated paper that takes this effect into consideration, the present inventors have come up with the following configuration. That is, when forming a printing portion on the laminated paper 10, for example, when forming the printing portion using flexographic printing, the present inventors have found that when the printing portion is printed on the nonwoven fabric raw material sheet 2 with a width of 1200 mm, the width of the nonwoven fabric raw material sheet shrinks from 1200 mm to 1150 mm after printing (i.e., shrinks to about 96% of the original width), or, under other conditions, the width of the nonwoven fabric raw material sheet shrinks from 1300 mm to 1200 mm (i.e., shrinks to about 92% of the original width). The inventors have attempted to print on the nonwoven fabric raw material sheet in a state in which it is stretched in the width direction (by the amount of shrinkage) in consideration of the shrinkage of the nonwoven fabric raw material sheet during printing, but have found that in this case, it becomes difficult to perform the desired printing on the nonwoven fabric raw material sheet. Therefore, in the manufacturing method for laminated paper 10 having a printing section, a nonwoven fabric raw material sheet having a width that is a predetermined percentage larger than the width of laminated paper 10 to be actually obtained according to the shrinkage rate is used as the nonwoven fabric raw material sheet in order to compensate for the shrinkage of the nonwoven fabric raw material sheet during printing (i.e., the width dimension of the nonwoven fabric raw material sheet is set to a width that compensates for the shrinkage dimension according to the shrinkage rate).

[0050] The inventors have confirmed through experiments that, for example, when a nonwoven fabric raw material sheet having a width of 1200 mm is used and the printing portion is printed on the nonwoven fabric raw material sheet, the nonwoven fabric raw material sheet shrinks after printing to a width of 1150 mm (i.e., a width 50 mm smaller than the width before printing, or a width approximately 4% smaller than the width before printing). Therefore, in the manufacture of the laminated paper of this embodiment, a nonwoven fabric is used as the base paper having a dimension approximately 4% (approximately 4.12%) larger than the dimension required after shrinkage. For example, when the width of the raw material sheet of the laminated paper is 1200 mm, the width of the crepe paper raw material sheet is the same 1200 mm, but the width of the nonwoven fabric raw material sheet is approximately 4% larger than 1200 mm (for example, a width of 1250 mm).

[0051] [Effects unique to the width setting of nonwoven fabric raw material sheets] According to the method for manufacturing laminated paper using nonwoven fabric raw material sheets whose width direction dimension is set as described above (i.e., whose width direction dimension is set so as to compensate for the shrinkage rate of the nonwoven fabric raw material sheets during printing), the width of the nonwoven fabric raw material sheets becomes the same as the predetermined width of the laminated paper raw material sheets (i.e., the predetermined width of the crepe paper raw material sheets) after the printing process of the printing unit. For example, if the predetermined width of the laminated paper raw material sheets (i.e., the predetermined width of the crepe paper raw material sheets) is 1200 mm, the width of the nonwoven fabric raw material sheets also becomes the same width, about 1200 mm (i.e., a width 50 mm smaller than the width before printing, or a width about 4% smaller than the width before printing). Therefore, a three-layer laminated paper raw material sheet is formed by laminating this printed nonwoven fabric raw material sheet (approximately 1200 mm wide) between a pair of crepe paper raw material sheets (1200 mm wide).The crepe paper raw material sheets as the pair of outer layers and the nonwoven fabric raw material sheet as the middle layer all have the same width, so the laminated paper raw material sheet can be smoothly supplied to the laminated paper manufacturing process as a 1200 mm wide laminated paper raw material sheet, and the manufactured laminated paper 10 will also have the desired width of 1200 mm.

[0052] Embodiment 2 (Laminated paper with a printed 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) consisting of a pair of crepe papers 1 and one nonwoven fabric 2, and a printed layer 2a of the printed part is provided on the surface of the nonwoven fabric 2 as an intermediate layer sheet, but as shown in Fig. 6, in the three-layer laminated paper 10 of the second embodiment, a printed layer 1a of the printed part is provided on the inner surface of the crepe paper 1 as an outer layer sheet. That is, in the second embodiment, the laminated paper 10 has a multi-layer structure (a multi-layer structure of three or more layers) consisting of a pair of crepe papers 1 as outer layer sheets and one or more nonwoven fabrics 2 as intermediate layer sheets arranged in a stacked state between the pair of crepe papers 1, and is characterized in that the printed part is provided on the inner surface of one of the crepe papers 1 as an outer layer sheet as its inner surface (i.e., as the inner surface of the laminated paper 10), and the crepe paper 1 is bonded to the nonwoven fabric 2 by heat fusion and pressure bonding with the heat fusion part 1. The inner surface of the crepe paper 1 refers to the surface that is on the inside of the laminated structure of the laminated paper 10 (i.e., the side facing the nonwoven fabric 2) when one (or two or more) sheets of nonwoven fabric 2 as intermediate layer sheets are sandwiched and stacked between a pair of crepe papers 1 as outer layer sheets to form the laminated paper 10. Here, both sides of the crepe paper 1 are composed of one surface with high smoothness (i.e., a relatively smooth surface with a good feel) and the other back surface with low smoothness (i.e., a relatively rough surface that is rough and feels coarse to the touch), but in the laminated paper 10 of the second embodiment, it is preferable to form the above-mentioned laminated structure with the surface side of the crepe paper 1 as the inner surface.

[0053] [Unique effect of printing on the inside (surface) of crepe paper] According to the laminated paper 10 of the second embodiment, the inventors have confirmed through experiments that when the nonwoven fabric 2 is interposed between a pair of crepe papers 1 and the crepe paper 1 is fixed to the nonwoven fabric 2 by heat fusion with the heat fusion part 1, the crepe paper 1 is more reliably and firmly adhered to the nonwoven fabric 2. In addition, when the printed layer 1a of the printed part is provided on the inner surface of the crepe paper 1 as in the second embodiment, the inner surface of the crepe paper 1 on which the printed layer 1a is provided (i.e., on which printing is performed with printing ink) becomes the surface with high smoothness, so that the desired pattern part 13 and advertisement part 14 can be printed in a better condition, and the printing quality can be further improved. Furthermore, in the second embodiment, the printed part is provided on the inner surface of the crepe paper 1, so that the printed part does not come into contact with the user's fingers or skin (skin), eliminating the user's anxiety about direct contact with the printing ink and reliably preventing health problems caused by the printing ink. Furthermore, when providing a printed portion on the laminated paper 10, it is preferable in terms of print quality to provide a printed portion on the nonwoven fabric 2 which forms the middle layer (i.e., the inner layer) of the laminated paper 10, as in embodiment 1, rather than providing a printed portion on the crepe paper 1 which forms the outer layer of the laminated paper 10, as in embodiment 2.

[0054] [Thickness of crepe paper, nonwoven fabric, and laminated paper] In the case of the laminated paper 10 of the second embodiment, the thickness of the crepe paper 1, the thickness of the nonwoven fabric 2, and the overall thickness of the laminated paper 10 can be set in the same manner as in the first embodiment.

[0055] Third embodiment (laminated paper having a colored portion provided on an intermediate layer sheet) [Overall composition of laminated paper and composition of non-permeable sheet as intermediate layer sheet] As shown in Figure 5, in the example of embodiment 1, the laminated paper 10 has a three-layer structure and is configured with a printed portion on the surface of the nonwoven fabric 2 serving as the middle layer sheet, and as shown in Figure 6, in embodiment 2, the laminated paper 10 has a three-layer structure and is configured with a printed portion on the inner surface of the crepe paper 1 serving as the outer layer sheet, while in embodiment 3, as shown in Figure 7, the three-layer laminated paper 10 of embodiment 3 has an intermediate layer sheet constituted by a non-permeable sheet 5 made of synthetic resin film (e.g., a non-water-permeable sheet or a waterproof sheet), and a printed layer 5a of the printed portion is provided on the surface of this non-permeable sheet 5. That is, in the third embodiment, the laminated paper 10 has a multi-layer structure (three-layer structure) consisting of a pair of crepe papers 1 as outer layer sheets and a single impermeable sheet 5 as an intermediate layer sheet arranged in a laminated state between the pair of crepe papers 1, and is characterized in that the printed part is provided on the surface of the impermeable sheet 5 as its inner surface (i.e., as the inner surface of the laminated paper 10), and the crepe paper 1 is bonded to the impermeable sheet 5 by heat fusion and pressure bonding using the heat fusion part 1. As the impermeable sheet 5, for example, in addition to what is generally called a vinyl sheet or vinyl film, resin films or sheets made of polyvinyl chloride resin, resin films or sheets made of polyolefin resin (polyethylene resin, polypropylene resin, etc.), etc. can be suitably used. In addition, the thickness of the impermeable sheet 5 is preferably set to a predetermined thickness within a range of, for example, 0.1 mm to 0.2 mm. The water-impermeable sheet as the impermeable sheet 5 has a main function of blocking the permeation of water, but the impermeable sheet may be composed of an impermeable sheet that blocks the permeation of oil (hereinafter referred to as an "oil-impermeable sheet"). In addition, when the term "impermeable sheet" is used in the present application, it includes the oil-impermeable sheet in addition to the water-impermeable sheet, and also includes sheets that block the permeation of other liquids and some gases. In other words, 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.

[0056] [Unique effects achieved by non-transparent sheets] According to the laminated paper 10 of embodiment 3, the impermeable sheet 5, which includes a water-impermeable sheet or an oil-impermeable sheet as an intermediate layer sheet, blocks the passage of moisture and oil, so that the laminated paper 10 can be used not only for typical products such as paper towels, but also as wrapping paper for temporarily or long-term packaging of objects or goods that have moisture or oil attached thereto, greatly expanding the uses of the laminated paper 10.

[0057] [Scope of the invention of laminated paper according to embodiments 1 to 3] The laminated paper 10 of the first to third embodiments is mainly characterized in that a printed portion is provided on the inner surface side of the laminated paper 10 (the inner surface of the intermediate layer sheet or the outer layer sheet). That is, as long as the laminated paper 10 of the first to third embodiments has such a printed portion, the configuration other than the printed portion (the configuration of the heat-sealed portion, etc.) can be different from that of the above-mentioned embodiments. That is, as long as the laminated paper 10 has a multi-layer structure consisting of an outer layer sheet and an intermediate layer sheet and has the printed portion on its inner surface side, the configuration of the heat-sealed portion and the configuration of other elements or parts can be any configuration. For example, in the laminated paper with the printed part of the present invention, the row of heat-sealed parts may be in the form of a broken line as in the above-mentioned embodiment 1, or may be in the form of a wavy line of another configuration, a dotted line, a chain line such as a chain line of one-dot chain line or two-dot chain line, or may be in the form of a zigzag or staggered line, or may be in the form of a straight line of solid lines, or may be embodied in a laminated paper with dot-shaped heat-sealed parts scattered therein. However, in order to obtain a sufficient expansion effect over the entire laminated paper after the laminated paper is hydrated and to give a sense of volume when used, it is preferable that the row of heat-sealed parts be in the form of a broken line (or chain line) straight line as in the above-mentioned embodiment.

[0058] [Invention of laminated paper without a printing section] On the other hand, among the configurations of the laminated paper 10 described in the first embodiment above, the following configurations alone are novel and inventive in view of the prior art. That is, in addition to the laminated paper invention having a printed portion as described above (hereinafter referred to as the "first laminated paper invention"), the laminated paper invention in which the thickness of the nonwoven fabric is within the specified range and the thickness of the crepe paper is within the specified range (hereinafter referred to as the "second laminated paper invention"), and the laminated paper invention in which the spacing between the heat-sealed portions in the width direction is within the specified range depending on the crepe rate of the crepe paper (hereinafter referred to as the "third laminated paper invention") are novel and inventive in view of the prior art even in the inventions themselves (i.e., even if they do not have a printed portion).

[0059] [Second laminated paper invention (thickness range of crepe paper and thickness range of nonwoven fabric)] Specifically, the second laminated paper of the present invention comprises a pair of crepe papers as outer layer sheets, and a heat-sealable intermediate layer sheet disposed in a laminated state between the crepe papers, and the crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealed portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Furthermore, the crepe paper has a weight of 20 to 50 g / m. 2 and the nonwoven fabric has a basis weight of 15 to 25 g / m 2 The thickness of the film is in the range of 100 mm to 150 mm.

[0060] [The third invention of laminated paper (crepe rate of crepe paper and widthwise heat-sealed interval)] The third laminated paper invention comprises a pair of crepe papers as outer layer sheets and a heat-sealable intermediate layer sheet arranged in a laminated state between the crepe papers, and the crepe paper is heat-sealed to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, and further, the widthwise heat-sealed portion spacing, which is the spacing between the widthwise center lines of adjacent rows of heat-sealed portions, is set to any value within a predetermined range depending on the range of the crepe rate of the crepe paper, and when the crepe rate of the crepe paper is within the range of 20% to 26%, the widthwise heat-sealed portion spacing is set within the range of 10 mm to 15 mm, and when the crepe rate of the crepe paper is within the range of 26% to 30%, the widthwise heat-sealed portion spacing is set within the range of 15 mm to 25 mm.

[0061] Embodiment 4 (Laminated paper having improved nonwoven fabric in intermediate layer sheet) [Nonwoven fabric composition] The laminated paper of the present invention can also be embodied as follows, as one having a characteristic feature in the configuration of the nonwoven fabric as the intermediate layer sheet. In particular, in the laminated paper of embodiment 4, the nonwoven fabric is made of a nonwoven fabric having a high degree of elasticity, specifically, as described below, made of a nonwoven fabric manufactured using so-called core-sheath structure fibers. That is, conventional nonwoven fabrics are made of so-called pulp nonwoven fabrics, and are manufactured by accumulating fibrous materials obtained by crushing wood pulp into a web-like form and bonding them together to form a sheet-like portion. Furthermore, conventional paper hand towels are generally manufactured from nonwoven fabric, and the nonwoven fabric used is made into a sheet-like form with a basis weight of 45 to 70 g / cm2.

[0062] [Types of nonwoven fabrics of the present invention (types according to manufacturing method)] In contrast, for example, referring to the cross-sectional view of FIG. 5, the laminated paper 10 of the fourth embodiment can use an air-through type (manufactured by thermal bonding) nonwoven fabric containing air as the intermediate layer sheet. In this way, the laminated paper 10 has a structure that is thick overall while being highly elastic, has a good feel to the touch, and has thermal fusion properties. Furthermore, the nonwoven fabric of the laminated paper of the fourth embodiment is made of a nonwoven fabric manufactured using a so-called core-sheath structure composite fiber as a raw material. This core-sheath composite fiber is a synthetic fiber of short fibers (PE / PP, PE / PET composite fiber) as the raw fiber of the nonwoven web (an accumulated layer of fibers sometimes called fleece) manufactured by a dry method or the like, and the fibers are bonded together by using the air-through method of the thermal bonding method (i.e., by passing hot air from the front surface to the back surface in the thickness direction of the web, the resin in the sheath part of the composite fiber melts and bonds between the fibers). In addition, 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 nonwoven fabric has a soft texture because no adhesive is used for inter-fiber bonding, but is not water-absorbent. Therefore, when a printed part is provided on the nonwoven fabric 2 as in the laminated paper 10 of the first to third embodiments, when the laminated paper 10 absorbs water, the nonwoven fabric 2 does not supply water to the printing ink of the printed layer 2a on the surface due to the absorption of water. Therefore, this laminated paper 10 exhibits an additional unique effect of being able to maintain the printing quality of the printed part of the nonwoven fabric 2 well. In addition, in this nonwoven fabric, the PE in the sheath part softens at low temperatures and can adhere the crepe paper 1 well by the heat-sealing part 11 of the laminated paper 10, while the PET in the core part maintains the strength of the fiber itself and maintains the overall strength of the nonwoven fabric. That is, in this nonwoven fabric, the sheath part of the core-sheath structure exerts adhesive force and functions as an adhesive for the crepe paper, while the core part contributes to maintaining strength.

[0063] As the material for the core-sheath structure fiber of this nonwoven fabric, polyethylene (PE) with a melting point of about 120°C (i.e., low-density PE with a melting point of 95 to 130°C or 114 to 126°C, high-density PE with a melting point of 120 to 140°C or 126 to 137°C) can be used. Usually, low-density PE is used, but PE with a density that has a melting point of about 120°C can be used. On the other hand, polypropylene (PP) with a melting point of about 140°C (i.e., low-melting-point PP) can be used. There are three types of PP: random PP, copolymer block PP, and homopolymer homo PP. Homo PP has a melting point of 160 to 165°C, and block PP has a synthetic melting point of 140 to 150°C (or 160 to 165°C), so in the case of block PP, one with a low melting point is used. The random PP having the lowest melting point can be one having a melting point of about 135 to 145° C. or one having a melting point of 135 to 150° C. In this embodiment, random PP can be used as the PP raw fiber of the nonwoven fabric, and in this case, the melting point of the random PP is a low melting point of 125° C.

[0064] [Types of nonwoven fabric (by melting point)] In the laminated paper of the present invention, when the nonwoven fabric as the intermediate layer sheet is an arbitrary nonwoven fabric, there is a nonwoven fabric to which the crepe paper does not adhere well due to the melting point. Therefore, as the nonwoven fabric 2 of the laminated paper 10, a nonwoven fabric having a melting point such that the crepe paper 1 is reliably adhered to the nonwoven fabric 2 by the heat-sealing component of the nonwoven fabric 2 (e.g., PE in the sheath part of the core-sheath structure fiber) at a predetermined heating temperature during heat fusion by the heat-sealing section row 11 in the laminated paper manufacturing device 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 is adhered to the nonwoven fabric by the adhesive force of only the linear heat-sealing section row, so that the type of nonwoven fabric is selected so that sufficient bonding strength can be obtained between the crepe paper and the nonwoven fabric with such a small adhesive area. As such a nonwoven fabric, a core-sheath type composite fiber as a polyester composite fiber, and a nonwoven fabric manufactured using a heat-sealing fiber for nonwoven fabric can be used. For example, the nonwoven fabric in this case may be one made of sheath-core conjugated fibers having a fineness of 2.2 dtex, a cut length of 5 mm or 10 mm, and a sheath component softening point of about 110° C., or one made of sheath-core conjugated fibers having a fineness of 1.7 dtex, a cut length of 5 mm, and a sheath component softening point of about 110° C., or one made of sheath-core conjugated fibers having a fineness of 2.2 dtex, a cut length of 5 mm, and a sheath component softening point of about 130° C. Alternatively, a nonwoven fabric may be used in which two or more of the above-mentioned sheath-core conjugated fibers are appropriately mixed as raw fibers.

[0065] Fifth embodiment (Laminated paper manufacturing device) The laminated paper of the present invention, including the invention of the laminated paper 10 of the above-mentioned embodiments 1 to 3, is preferably produced using a laminated paper production device described below.

[0066] [Manufacturing equipment configuration] 9, the laminated paper manufacturing apparatus of the fifth embodiment supports a roll of crepe paper 21, which is a raw material sheet (crepe paper raw material sheet) for one of the pair of crepe papers, a roll of nonwoven fabric 22, which is a raw material sheet (nonwoven fabric raw material sheet) for the nonwoven fabric, and the other roll of crepe paper 23, which is a raw material sheet (crepe paper raw material sheet) for the other of the pair of crepe papers, on three support rollers 51, 52, and 53 arranged in parallel, so as to be rotatable and supplyable. The one crepe paper 1, the nonwoven fabric 2, and the other crepe paper 1 drawn out from the one roll of crepe paper 21, the roll of nonwoven fabric 22, and the other roll of crepe paper 23 respectively constitute a raw material sheet (laminate paper raw material sheet) for the laminated paper 10 in a stacked state (i.e., in a three-layer stacked state). This laminated paper raw material sheet is folded back by a first guide roller 61, and is guided and introduced between a first heat seal roller 70 as one pressure roller and a second heat seal roller 80 as the other pressure roller. The laminated paper raw material sheet is folded back from the first guide roller 61 to the second heat seal roller 80, and is guided by a second guide roller 62 to be inserted between the first heat seal roller 70 and the second heat seal roller 80. The laminated paper raw material sheet before being inserted between the first heat seal roller 70 and the second heat seal roller 80 is a pre-heat-sealed laminated paper 10X in a state in which the crepe paper 1 and the nonwoven fabric 2 are not heat-sealed.

[0067] Next, the crepe paper 1 and the nonwoven fabric 2 in a stacked state are heat-sealed between the first and second heat seal rollers 70, 80 to form the laminated paper 10 having the heat-sealed portion 11. The laminated paper raw material sheet after heat fusion becomes the heat-sealed laminated paper 10Y in a state in which the crepe paper 1 and the nonwoven fabric 2 are heat-sealed. The long heat-sealed laminated paper 10Y (as the base paper before cutting) led out from the first and second heat seal rollers 70, 80 is folded back by the third guide roller 63 and the fourth guide roller 64 and guided to the winding roller 55. The winding roller 55 winds up the heat-sealed laminated paper 10Y to form the rolled laminated paper 10R. This rolled laminated paper 10R is removed from the winding roller 55 and used as base paper for paper towels and the like. In addition, a slitter is disposed between the fourth guide roller 64 and the winding roller 55, and after heat sealing, the laminated paper 10R is cut into multiple pieces in the width direction, and multiple laminated papers 10 of a predetermined width are arranged side by side and wound around the winding roller.

[0068] [Heat seal roller] Next, the first and second heat seal rollers 70, 80 will be described in detail with reference to Figs. 10 to 13. Fig. 10 shows the first and second heat seal rollers 70, 80 of Fig. 9 as viewed from above, and the first and second heat seal rollers 70, 80 are arranged side by side facing each other at the front and rear of the supply direction of the pre-heat-sealing laminated paper 10X so that their axes are parallel to each other. The first and second heat seal rollers 70, 80 have the same predetermined roller length L (for example, an axis length of any value within the range of 1200 mm to 1500 mm) and the same predetermined roller diameter D (for example, a diameter of any value within the range of 180 mm to 300 mm).

[0069] [First heat seal roller] As shown in Fig. 9 and Fig. 10, the first heat seal roller 70 is formed in a cylindrical shape with the predetermined roller diameter D, and on its peripheral surface, non-bonding parts 71 in the form of a ring groove of a certain width and thermo-compression bonding protrusions 72 in the form of a broken line convex ring (or broken line convex stripe) of a certain width are arranged in parallel to each other so as to be alternately arranged in the axial direction. As shown in Fig. 11, each of the non-bonding parts 71 has a bonding surface 72a that extends intermittently as an arc-shaped surface in the circumferential direction along the peripheral surface of the first heat seal roller 70 and is a flat surface in the width direction. In detail, each of the thermo-compression bonding protrusions 72 has a thermo-compression bonding surface 72a (as the peripheral surface of the thermo-compression bonding protrusions 72) that extends linearly in the circumferential direction for a certain length along the peripheral surface of the first heat seal roller 70 and is arranged continuously at a certain interval in the circumferential direction of the first heat seal roller 70. The thermocompression surface 72a of the thermocompression protrusion 72 is an arc-shaped surface (curved surface) in the length direction, and the length of the arc is set to be the same as the length of the first thermocompression portion 11a or the second thermocompression portion 11b of the thermocompression portion row 11. The thermocompression surface 72a of the thermocompression protrusion 72 is flat in the width direction, and the width is set to be the same as the width of the first thermocompression portion 11a or the second thermocompression portion 11b of the thermocompression portion row 11. Furthermore, the spacing between adjacent thermocompression surfaces 72a of the thermocompression protrusions 72 in each row is set to be the same dimension as the spacing between adjacent first thermocompression portions 11a or second thermocompression portions 11b of the thermocompression portion row 11.

[0070] In this way, the first heat seal roller 70 is configured to form a broken-line convex ring-shaped thermocompression protrusion 72 on the entire circumference in the circumferential direction to form one row of heat-sealed portions 11 of the laminated paper 10. The first heat seal roller 70 also has multiple rows of thermocompression protrusions 72 arranged in a row in the axial direction so that they are parallel to each other at the same fixed intervals as the widthwise arrangement intervals of the multiple rows of heat-sealed portions 11 of the laminated paper 10. As a result, the first heat seal roller 70 has a ring-shaped non-compressed portion 71 between adjacent thermocompression protrusions 72. The first heat seal roller 70 also has multiple rows of non-compression portions 71 arranged in a row in the axial direction so that they are parallel to each other at the same fixed intervals as the non-fused portions 12 of the laminated paper 10. Furthermore, in the first heat seal roller 70, the heat-sealing surfaces 72a of the heat-sealing protrusions 72 in adjacent rows are arranged at offset positions in the circumferential direction of the first heat seal roller 70 so that the longitudinal center position of the heat-sealing surface 72a of one heat-sealing protrusion 72 is located at the middle position of the gap between the adjacent heat-sealing surfaces 72a of the other heat-sealing protrusion 72. As a result, as shown in Figures 11, 12 and 13, the heat-sealing protrusions 72 are composed of a first row of heat-sealing protrusions 72A corresponding to the first row of heat-sealing portion rows 11A of the laminated paper 10, and a second row of heat-sealing protrusions 72B corresponding to the second row of heat-sealing portion rows 11B. The first row of heat-sealed protrusions 72A have their heat-sealed surfaces 72a arranged in the circumferential direction of the first heat-seal roller 70 in correspondence with the first heat-sealed portions 11a of the first row of heat-sealed portion rows 11A, and the second row of heat-sealed protrusions 72B have their heat-sealed surfaces 72a arranged in the circumferential direction of the first heat-seal roller 70 in correspondence with the second heat-sealed portions 11b of the second row of heat-sealed portion rows 11B.

[0071] 10, the heat-sealing surface 72a of the heat-sealing protrusion 72 is made up of a straight narrow belt portion 72x that extends linearly in a plan view (extending in a curved manner along the circumferential surface of the second heat-seal roller 70 in the circumferential direction of the second heat-seal roller 70) and semicircular curved portions 72y at both longitudinal ends of the straight narrow belt portion 72x. As a result, each of the heat-sealing portions 11a, 11b of the heat-sealing portion row 11 of the laminated paper 10 obtained by heat-sealing and heat-sealing the crepe paper raw material sheet of the laminated paper raw material sheet to the nonwoven fabric raw material sheet by the heat-sealing surface 72a of the heat-sealing protrusion 72 of the heat-sealing roller 70 is made up of a straight narrow belt portion that extends linearly in the longitudinal direction of the laminated paper 10 and semicircular portions at both longitudinal ends of the straight narrow belt portion, as shown in FIGS. 1, 2, and 14, in accordance with the outer shape of each heat-sealing surface 72a. Furthermore, as shown in FIG. 13, on both sides in the width direction of the thermocompression surface 72a of each thermocompression bonding protrusion 72, a pair of side surfaces 72b extend perpendicular to the thermocompression surface 72a.

[0072] [Second heat seal roller] On the other hand, as shown in Fig. 9 and Fig. 10, the second heat seal roller 80 is formed in a cylindrical shape with the predetermined roller diameter D, and on its peripheral surface, non-bonding parts 81 in the form of a ring groove of a certain width and thermo-compression-bonding protrusions 82 in the form of a convex ring (or convex stripe) of a certain width are arranged in parallel to each other so as to be alternately arranged in the axial direction. As shown in Fig. 11, each of the non-bonding parts 81 extends continuously as an arc-shaped surface in the circumferential direction along the peripheral surface of the second heat seal roller 80 (i.e., over the entire circumference of the peripheral surface of the second heat seal roller 80), and has a bonding surface 82a (as the peripheral surface of the thermo-compression-bonding protrusions 82) that is a flat surface in the width direction. The thermo-compression surface 82a of the thermo-compression-bonding protrusions 82 is an arc-shaped surface (curved surface) in the length direction. In addition, the heat-sealing surface 82a of the heat-sealing protrusion 82 is flat in the width direction, but its width is set to be larger than the width of the first heat-sealing portion 11a or the second heat-sealing portion 11b of the heat-sealing portion 11 (i.e., larger than the width of the heat-sealing surface 72a of the heat-sealing protrusion 72 of the first heat seal roller 70).

[0073] In this way, the second heat seal roller 80 has a ring-shaped heat-compression bonding protrusion 82 formed over the entire circumference in a position facing the heat-compression bonding protrusion 72 of the first heat seal roller 70. As a result, the pre-heat-sealed laminate paper 10X is sandwiched between the heat-compression bonding protrusion 72 of the first heat seal roller 70 and the heat-compression bonding protrusion 82 of the second heat seal roller 80, and the crepe paper 1 of the pre-heat-sealed laminate paper 10X is heat-compressed and heat-fused to the nonwoven fabric 2 between the heat-compression bonding surface 72a of the heat-compression bonding protrusion 72 and the heat-compression bonding surface 82a of the heat-compression bonding protrusion 82, thereby forming the heat-sealed portion row 11 of the laminate paper 10.

[0074] Furthermore, as shown in FIG. 13, the width of the heat-pressed surface 82a of the heat-pressed protrusion 82 of the second heat-seal roller 80 is set to a width that is a certain dimension larger than the width of the heat-pressed surface 72a of the heat-pressed protrusion 72 of the first heat-seal roller 70, so that when the heat-pressed surface 72a of the heat-pressed protrusion 72 and the heat-pressed surface 82a of the heat-pressed protrusion 82 are arranged opposite each other in a substantially close contact state (with a gap the thickness of the heat-sealed portion 11 of the laminated paper 10), a certain width portion of both ends of the heat-pressed surface 82a of the heat-pressed protrusion 82 is exposed on both widthwise sides of the heat-pressed surface 72a of the heat-pressed protrusion 72. As a result, when the crepe paper 1 of the pre-heat-fused laminate paper 10X is heat-pressed and heat-fused to the nonwoven fabric 2 between the heat-pressed surface 72a of the heat-pressed protrusion 72 and the heat-pressed surface 82a of the heat-pressed protrusion 82, both widthwise end edges of the heat-pressed surface 72a of the heat-pressed protrusion 72 are positioned on top of the heat-pressed surface 82a of the heat-pressed protrusion 82, greatly reducing the external force (especially the shear force) applied to the pre-heat-fused laminate paper 10X from both widthwise end edges of the heat-pressed surface 72a of the heat-pressed protrusion 72. In other words, if the width of the heat-pressed surface 72a of the heat-pressed protrusion 72 and the width of the heat-pressed surface 82a of the heat-pressed protrusion 82 were the same width, when the crepe paper 1 of the pre-heat-fused laminate paper 10X is heat-pressed and heat-fused to the nonwoven fabric 2 between the heat-pressed surface 72a of the heat-pressed protrusion 72 and the heat-pressed surface 82a of the heat-pressed protrusion 82, both widthwise ends of the heat-pressed surface 72a of the heat-pressed protrusion 72 would be positioned in the same position as both widthwise ends of the heat-pressed surface 82a of the heat-pressed protrusion 82, and the external force (especially the shear force) applied to the pre-heat-fused laminate paper 10X from both widthwise ends of the heat-pressed surface 72a of the heat-pressed protrusion 72 would become large, and there is a possibility that part of the pre-heat-fused laminate paper 10X (especially the crepe paper 1) would be cut or damaged. However, as shown in Fig. 13, such a defect can be reliably prevented by setting the width of the heat-compression surface 82a of the heat-compression bonding protrusions 82 of the second heat-seal roller 80 to a width larger by a certain dimension than the width of the heat-compression surface 72a of the heat-compression bonding protrusions 72 of the first heat-seal roller 70. Note that, on both sides in the width direction of the heat-compression surface 82a of the heat-compression bonding protrusions 82 of the second heat-seal roller 80, a pair of side surfaces 82b extend at a predetermined angle inclined to the heat-compression surface 82a (at an obtuse inclination angle).Thus, in the laminated paper manufacturing apparatus, it is preferable that the heat-pressed surfaces 72a, 82a of the heat-pressed protrusions 72, 82 of the lower heat-seal roller 80 be wider than the heat-pressed surface 72a of the upper heat-seal roller 70, and that the corners of both widthwise end edges of the heat-pressed protrusion 92 of the lower heat-seal roller 80 be cut (notched) to form a tapered (chamfered) or radiused (curved chamfered) cut shape.

[0075] [Roller length and diameter] The roller length L of the heat seal rollers 70, 80 is preferably in the range of 1200 mm to 1500 mm. If the roller diameter D of the heat seal rollers 70, 80 is less than 1200 mm, the productivity may decrease. On the other hand, if the roller length L of the heat seal rollers 70, 80 is more than 1500 mm, the problem of the crown phenomenon described below may occur. In addition, the roller diameter D of the heat seal rollers 70, 80 is preferably in the range of 180 mm to 300 mm. If the roller diameter D of the heat seal rollers 70, 80 is less than 180 mm, the pressure of the heat-sealed portion of the pre-heat-sealed laminated paper 10X by the heat-sealing protrusions 72, 82 may be insufficient. On the other hand, if the roller diameter D of the heat seal rollers 70, 80 is more than 300 mm, the problem of high costs may occur.

[0076] [Relationship between the roller diameter and length of the heat seal roller and the pressure during thermocompression] The present inventor has found that, in the thermocompression bonding operation of the pre-heat-sealed laminate paper 10X by the heat seal rollers 70, 80, the pressing force applied from the thermocompression bonding protrusions 72, 82 to the heat-sealed portion of the pre-heat-sealed laminate paper 10X varies depending on the roller diameter D and roller length L of the heat seal rollers 70, 80. The present inventor has also found that, in the thermocompression bonding operation of the pre-heat-sealed laminate paper 10X by the heat seal rollers 70, 80, the pressing force applied from the thermocompression bonding protrusions 72, 82 to the heat-sealed portion of the pre-heat-sealed laminate paper 10X (hereinafter referred to as the "pressing force during thermocompression bonding") needs to be at least 2 to 3 atmospheres in order to reliably form the heat-sealed portions 11, 11b, even if the roller length L of the heat seal rollers 70, 80 is small. Furthermore, when the roller length L of the heat seal rollers 70, 80 is 1400 mm, the pressure during thermocompression bonding is preferably within a range of 5.5 to 7.0 atmospheres. That is, when the roller length L of the heat seal rollers 70, 80 is 1400 mm, the pre-thermal fusion laminated paper 10X has sufficient durability up to a pressure of 5 to 7 atmospheres during thermocompression bonding by the heat seal rollers 70, 80, so this range is optimal for the pressure during thermocompression bonding. If the pressure during thermocompression bonding is 7 atmospheres or more, the pre-thermal fusion laminated paper 10X may be damaged (for example, may break at a part corresponding to a corner or the like of the thermocompression bonding surface 72a of the thermocompression bonding protrusion 72).

[0077] In addition, when the roller length L of the heat seal rollers 70, 80 is 1400 mm, if the pressure during thermocompression bonding is 7 atmospheres or more, the so-called crown phenomenon (the heat seal rollers 70, 80 are curved in the radial direction, causing a gap between the heat seal rollers 70, 80) may occur in the heat seal rollers 70, 80. When this crown phenomenon occurs, the heat seal rollers 70, 80 are curved in the radial direction, causing a drum-shaped gap to occur between the heat seal rollers 70, 80 when viewed from the front. In this case, the radial gap interval that occurs between the heat seal rollers 70, 80 is a small interval, but a large range in the length direction of the heat seal rollers 70, 80 is curved, causing a small gap to occur in that large range. Therefore, although the gap between the heat seal rollers 70, 80 due to this crowning phenomenon is a very small gap of less than 1 mm, because the thickness of the laminated paper raw material sheet (pre-heat-fused laminated paper 10X) is thin at less than 1 mm, the heat-pressing surfaces 72a, 82a of the heat seal rollers 70, 80 are in a state of floating above the pre-heat-fused laminated paper 10X, and a gap may occur between them.In this case, the heat-pressing surfaces 72a, 82a of the heat seal rollers 70, 80 will not be able to press the heat-sealed portion of the pre-heat-fused laminated paper 10X.

[0078] Therefore, in order to avoid such a problem of the crown phenomenon, when the roller length L of the heat seal rollers 70, 80 is 1400 mm, it is preferable that the pressure during thermocompression bonding is within the range of 5.5 to 7.0 atmospheres as described above. When the roller length L of the heat seal rollers 70, 80 is 1400 mm, if the pressure during thermocompression bonding is less than 5.5 atmospheres, there is a possibility that the thermocompression bonding protrusions 72, 82 cannot stably form the heat-sealed portion of the pre-thermal-fusion laminated paper 10X (i.e., the adhesive force of the heat-sealed portion may be insufficient). On the other hand, when the roller length L of the heat seal rollers 70, 80 is 1400 mm, if the pressure during thermocompression bonding is a value exceeding 7 atmospheres, excessive pressure is applied to the heat-sealed portion of the pre-thermal-fusion laminated paper 10X, and the heat-sealed portion may harden during adhesion. In addition, when the roller length L of the heat seal rollers 70, 80 is 1200 mm, the pressure during thermocompression bonding can also be 4.5 atmospheres. In addition, when the roller length L of the heat seal rollers 70, 80 is 1500 mm, the pressure during thermocompression bonding can be in the range of 7.5 to 8.0 atmospheres. When the roller length L of the heat seal rollers 70, 80 is 1500 mm, if the pressure during thermocompression bonding is less than 7.5 atmospheres, the thermocompression protrusions 72, 82 may not be able to stably form the heat-sealed portion of the pre-thermal-sealed laminated paper 10X (i.e., 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, 80 is 1500 mm, if the pressure during thermocompression bonding is a value exceeding 8 atmospheres, excessive pressure may be applied to the heat-sealed portion of the pre-thermal-sealed laminated paper 10X, and the heat-sealed portion may harden during bonding.

[0079] [Heat seal roller temperature control] In the laminated paper manufacturing apparatus, in order to reliably heat-seal the crepe paper as the outer layer sheet and the middle layer sheet (nonwoven fabric, non-permeable sheet, etc.) at the heat-sealed portion of the pre-heat-sealed laminated paper 10X, it is preferable to set the temperature during heat-sealing by the heat-seal rollers 70, 80 (hereinafter referred to as the "heat-sealing temperature") within the range of 175 to 200°C, and to control the temperature so that the temperature distribution is constant throughout the entire length of the heat-seal rollers 70, 80. If the heat-sealing temperature of the heat-sealing rollers 70, 80 is 175°C or lower, the crepe paper and the nonwoven fabric cannot be reliably bonded by heat fusion at the heat-sealing portion of the pre-heat-sealing laminated paper 10X, whereas if the heat-sealing temperature is 200°C or higher, the heat-adhesive resin (PP (polypropylene), PE (polyethylene), etc.) of the intermediate layer sheet may harden and deteriorate, or the intermediate layer sheet itself such as the nonwoven fabric may harden, causing the heat-sealing fiber material (heat-sealing synthetic resin fiber) to lose its fusion function (i.e., this makes it impossible to bond the crepe paper by fusion). As shown in Fig. 15(a), it is preferable to control the temperature and rotation of the heat-sealing rollers 70, 80 in the laminated paper manufacturing device so that the heat-sealing temperature of the heat-sealing rollers 70, 80 increases or decreases in proportion to the rotation speed of the heat-sealing rollers 70, 80 (i.e., the feed speed of the pre-heat-sealing laminated paper 10X, in other words, the formation speed of the heat-sealing portion in the length direction).

[0080] [Rotation control of heat seal roller] In the laminated paper manufacturing device, in order to reliably heat-seal the crepe paper as the outer layer sheet and the intermediate layer sheet (nonwoven fabric, non-permeable sheet, etc.) at the heat-sealed portion of the pre-heat-sealed laminated paper 10X, the heat-sealing rollers 70, 80 start rotating after the heat-sealing temperature reaches the above-mentioned set range, and the heat-sealing portion of the pre-heat-sealed laminated paper 10X is formed. In addition, the heat-sealing temperature of the heat-sealing rollers 70, 80 is controlled to be constant within the above-mentioned set range, but it is preferable to control the rotation speed of the heat-sealing rollers 70, 80 by increasing or decreasing it according to the thickness of the laminated paper raw material sheet (i.e., the thickness of the pre-heat-sealed laminated paper 10X). That is, as shown in FIG. 15(c), it is preferable to control the rotation of the heat-sealing rollers 70, 80 in the laminated paper manufacturing device so that the rotation speed of the heat-sealing rollers 70, 80 increases or decreases in proportion to the thickness (base paper thickness) of the pre-heat-sealed laminated paper 10X. In this case, too, the heat-sealing temperature of the heat-sealing rollers 70, 80 is kept constant, and the rotation speed of the heat-sealing rollers 70, 80 (base paper feed speed) is increased or decreased depending on the base paper thickness. Similarly, as shown in FIG. 15(d), the laminated paper manufacturing device can control the rotation of the heat-sealing rollers 70, 80 so that the rotation speed of the heat-sealing rollers 70, 80 increases or decreases in proportion to the thickness of the nonwoven fabric raw material sheet (nonwoven fabric thickness) of the pre-heat-fused laminated paper 10X. In this case, too, the heat-sealing temperature of the heat-sealing rollers 70, 80 is kept constant, and the rotation speed of the heat-sealing rollers 70, 80 (base paper feed speed) is increased or decreased depending on the nonwoven fabric thickness. Furthermore, as shown in FIG. 15(b), the laminated paper manufacturing device can control the temperature of the heat-sealing rollers 70, 80 so that the heat-sealing temperature of the heat-sealing rollers 70, 80 increases or decreases in proportion to the thickness of the nonwoven fabric (nonwoven fabric thickness) of the pre-heat-fused laminated paper 10X. In this case, too, the rotation speed of the heat seal rollers 70, 80 is kept constant, and the heat bonding temperature of the heat seal rollers 70, 80 is increased or decreased according to the thickness of the nonwoven fabric. Here, the heat bonding speed by the heat seal rollers (the length of the row of heat-sealed portions formed in the pre-heat-sealed laminated paper 10X per unit time) is preferably, for example, 20 m / min.

[0081] [Uniform temperature control] As described above, the laminated paper manufacturing device controls the thermal compression temperature of the heat seal rollers 70, 80 so that the temperature distribution is uniform throughout the heat seal rollers 70, 80, preventing uneven adhesion at the heat fusion portion, and the configuration shown in Fig. 12 can be used as a configuration for this temperature control. In detail, the heat seal rollers 70, 80 are each cylindrical with both ends closed by a peripheral wall and a pair of side walls 73, 83, as shown in Fig. 11, and therefore, sealed spaces 70S, 80S are formed inside the heat seal rollers 70, 80, respectively, as shown in Fig. 12. The internal spaces 70S, 80S of the heat seal rollers 70, 80 are sealed spaces maintained in a vacuum state. The laminated paper manufacturing device connects an external water supply means to the internal spaces 70S, 80S of the heat seal rollers 70, 80, respectively, and supplies moisture from the water supply means to the internal spaces 70S, 80S of the heat seal rollers 70, 80, respectively, and maintains the temperature of the heat seal rollers 70, 80 constant by using the steam obtained by heating the moisture when the heat seal rollers 70, 80 are heated. For example, the laminated paper manufacturing device stores a predetermined amount of water in the internal spaces 70S, 80S of the heat seal rollers 70, 80 in advance, and maintains the temperature of the heat seal rollers 70, 80 constant by using the steam obtained by heating the moisture when the heat seal rollers 70, 80 are heated, or supplies saturated steam or superheated steam to the internal spaces 70S, 80S when the heat seal rollers 70, 80 are in operation, and maintains the temperature of the heat seal rollers 70, 80 constant by using the steam. In this case, high-temperature steam (e.g., saturated steam) is applied to the inner surface of the heat-seal rollers 70, 80 in the form of a thin layer or film, and the layer or film of steam maintains a uniform temperature throughout the heat-seal rollers 70, 80. The laminated paper manufacturing device heats the heat-seal rollers 70, 80 with a specified heating means to raise the temperature to the heat-sealing temperature before the heat-sealing rollers 70, 80 start the thermocompression bonding operation.For example, the laminated paper manufacturing device winds an induction coil around the inside of the heat seal roller 70, 80, outputs an AC current to the induction coil to induce eddy currents in the heat seal roller 70, 80, and controls the heat seal roller to be heated to the predetermined thermocompression temperature by Joule heating and to maintain the predetermined temperature constant. In addition to the induction heating by the induction heating means, the heat seal roller 70, 80 is controlled to maintain the predetermined thermocompression temperature uniformly and evenly over the entire circumference and length of the heat seal roller 70, 80 (especially over the entire thermocompression surfaces 72a, 82a of all the thermocompression protrusions 72, 82). As a result, the temperature distribution of the thermocompression surfaces 72a, 82a of the thermocompression protrusions 72, 83 of the heat seal roller 70, 80 is maintained absolutely the same (uniform) over the entire surface. It is preferable that the heating means (heater) of the heat seal rollers 70, 80 be of the above-mentioned electric type (for example, an induction heating type configuration like the induction heating means). This makes it possible to avoid the risk of oil leakage as occurs when the heating means is of the oil heater type, and also makes it possible for the heating means itself to contribute to stabilizing the temperature distribution of the heat seal rollers 70, 80, compared to the oil heater type.

[0082] Furthermore, the laminated paper manufacturing device controls the pressure applied by the heat seal rollers 70, 80 during thermal bonding so that it is constant across the entire surface of the opposing surface between the thermal bonding surface 72a of the thermal bonding protrusion 72 and the thermal bonding surface 82a of the thermal bonding protrusion 82. In this manner, it is preferable for the laminated paper manufacturing device to simultaneously control the temperature distribution and the pressure distribution of the heat seal rollers 70, 80, thereby minimizing uneven adhesion in the thermally bonded portions 11a, 11b of the thermally bonded portion row 11 of the laminated paper 10.

[0083] [Laminated paper manufacturing method] The laminated paper of the present invention, including the invention of the laminated paper 10 of the above-mentioned embodiments 1 to 3, is preferably manufactured by the laminated paper manufacturing method described below. Note that the laminated paper manufacturing device of embodiment 5 can be suitably used for this laminated paper manufacturing method.

[0084] Sixth embodiment (another example of a laminated paper manufacturing device) In the laminated paper manufacturing apparatus of the fifth embodiment, a configuration of thermocompression bonding by a pair of heat seal rollers 70, 80 is adopted as a means for forming the thermally fused portion row 11 of the laminated paper 10 (hereinafter referred to as the "thermal fusion means"), but as the thermal fusion means for forming the thermally fused portion row 11 of the laminated paper 10, a configuration in which the crepe paper is bonded to the intermediate layer sheet such as a nonwoven fabric by high-frequency welding or ultrasonic welding (by the fusion action of the thermal fusion component of the intermediate layer sheet) can be adopted in addition to this configuration. According to these thermal fusion means using high-frequency welding or ultrasonic welding, the bonding temperature by thermal fusion is easy to adjust, there is a variety of materials, and it is also possible to use inexpensive materials such as thermoplastic resin film sheets with low melting points. For example, the laminated paper manufacturing apparatus shown in FIG. 16 is provided with a high-frequency sewing machine as a high-frequency welding means in the thermal fusion means. The laminated paper manufacturing apparatus of this embodiment 6 is basically configured in the same way as the laminated paper manufacturing apparatus of embodiment 5, except that the pair of heat seal rollers 70, 80 of the laminated paper manufacturing apparatus of embodiment 5 shown in Figure 9 is replaced with a high-frequency sewing machine 100.A pre-heat-sealed laminated paper 10X having a three-layer structure (three-ply structure) with a nonwoven fabric 2 sandwiched between a pair of crepe papers 1 is guided and fed to the high-frequency sewing machine 100 by guide rollers 61, 62, and the high-frequency sewing machine 100 forms a heat-sealed portion row 11 at a predetermined position of the heat-sealed laminated paper 10.After that, the heat-sealed laminated paper 10Y is guided by guide rollers 63, 64 and wound around the winding roller 55.

[0085] [High frequency sewing machine] The high frequency sewing machine 100 has a first welding roller 101 and a second welding roller 102 disposed opposite each other, and sandwiches the pre-heat-sealed laminated paper 10X between the first welding roller 101 and the second welding roller 102 and high frequency welds it to form the heat-sealed section row 11. At this time, it is preferable that the high frequency current (for heat welding) applied to the first welding roller 101 and the second welding roller 102 is variously controlled so as to maintain a constant temperature according to various conditions such as the thickness of the base paper and the thickness of the nonwoven fabric, as described in the laminated paper manufacturing apparatus and laminated paper manufacturing method of the fifth embodiment above.

[0086] [Another aspect of the present invention] The present invention can also be understood as an invention of a laminated paper, a method for manufacturing laminated paper, or an apparatus for manufacturing laminated paper, as described below.

[0087] First, the laminated paper according to a first aspect of the present invention comprises a pair of crepe papers as outer layer sheets and a heat-sealable intermediate layer sheet arranged in a laminated state between the crepe papers, and the crepe paper is heat-sealed to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. The laminated paper of the present invention also has a printed portion on the inner surface of the intermediate layer sheet or the crepe paper, and the thickness of the crepe paper is set so that the printed portion can be seen from the outside through the crepe paper when the crepe paper is in a wet state.

[0088] A second aspect of the present invention relates to a method for manufacturing laminated paper as recited in claim 1, wherein the intermediate layer sheet is made of nonwoven fabric, and in order to compensate for shrinkage that occurs during printing of the printed portion on the nonwoven fabric raw material sheet which serves as the raw material sheet for the nonwoven fabric, a nonwoven fabric raw material sheet is used having a width that is a predetermined percentage larger than the width of the laminated paper that is actually to be obtained, depending on the shrinkage rate.

[0089] A laminated paper manufacturing apparatus according to a third aspect of the present invention is a laminated paper manufacturing apparatus according to the first aspect, comprising a pair of first and second heat seal rollers for forming the heat-sealed portion row, the first heat seal roller has a convex-shaped heat-pressed protrusion corresponding to the heat-sealed portion and the peripheral surface of the heat-pressed protrusion is the heat-pressed surface, the second heat seal roller has a convex-shaped heat-pressed protrusion facing the heat-pressed protrusion of the first heat seal roller and the peripheral surface of the heat-pressed protrusion is the heat-pressed surface facing the heat-sealed surface of the first heat seal roller, and the width of the heat-pressed surface of the heat-pressed protrusion of the second heat seal roller is set to a width that is a certain dimension larger than the width of the heat-pressed surface of the heat-pressed protrusion of the first heat seal roller.

[0090] According to another aspect of the present invention, there is provided a laminated paper comprising a pair of crepe papers as outer layer sheets and a heat-sealable intermediate layer sheet disposed in a laminated state between the crepe papers, the crepe paper being heat-sealed to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, a printed portion is provided on a surface of the intermediate layer sheet facing one of the crepe papers as the outer layer sheets, and the thickness of the crepe paper is adjusted by adjusting the thickness of the crepe paper so that the printed portion provided on the surface of the intermediate layer sheet is equal to the thickness of the crepe paper when the crepe paper is in a wet state. The thickness of the crepe paper is set so that it can be seen from the outside through the crepe paper, and the printed portion on the intermediate layer sheet can be seen from the outside through the crepe paper even when the crepe paper is in a dry state, and the thickness of the crepe paper on at least the side of the intermediate layer sheet on which the printed portion is provided is set so that when the crepe paper contains water, the transparency of the printed portion on the intermediate layer sheet through the crepe increases, thereby increasing the visibility of the printed portion on the intermediate layer sheet from the outside through the crepe paper. In addition, the laminated paper of the present invention can be configured to comprise crepe paper as a pair of outer layer sheets and a heat-sealable intermediate layer sheet arranged in a laminated state between the crepe papers, in which the crepe paper is heat-sealed to the intermediate layer sheet by a row of linear heat-seal portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, and a printed portion is provided on the inner surface of the intermediate layer sheet or the crepe paper, and the thickness of the crepe paper is set to a thickness such that the printed portion can be seen from the outside through the crepe paper when the crepe paper is in a wet state.

[0091] In addition, a manufacturing method for laminated paper of the present invention from another aspect is a manufacturing method for laminated paper from the above-mentioned another aspect, wherein the intermediate layer sheet is made of nonwoven fabric, and the nonwoven fabric is a non-water-absorbent air-through type nonwoven fabric manufactured by inter-fiber bonding of core-sheath structure composite fibers in which the outer sheath is polyethylene and the inner core is polyethylene terephthalate using an air-through method without using an adhesive, and the printed portion is formed using flexographic printing technology as a printing method and using water-based ink or ultraviolet-curing ink as a printing ink, and in order to compensate for shrinkage during printing of the printed portion on the nonwoven fabric raw material sheet that is the raw material sheet for the nonwoven fabric, the printed portion is printed on the nonwoven fabric using a nonwoven fabric raw material sheet having a width that is a predetermined percentage larger than the width of the laminated paper to be actually obtained, depending on the shrinkage rate. In addition, in the manufacturing method of the laminated paper of the present invention, the intermediate layer sheet is made of nonwoven fabric, and in order to compensate for shrinkage that occurs during printing of the printed portion on the nonwoven fabric raw material sheet that serves as the raw material sheet for the nonwoven fabric, a nonwoven fabric raw material sheet having a width that is a predetermined percentage larger than the width of the laminated paper to be actually obtained can be used, depending on the shrinkage rate.

[0092] A laminated paper manufacturing apparatus according to another aspect of the present invention is a laminated paper manufacturing apparatus according to the above-mentioned another aspect, comprising a pair of first and second heat seal rollers for forming the heat-sealed portion row, the first heat seal roller has a convex stripe-shaped heat-pressed protrusion corresponding to the heat-sealed portion and the peripheral surface of the heat-pressed protrusion is the heat-pressed surface, the second heat seal roller has a convex stripe-shaped heat-pressed protrusion facing the heat-pressed protrusion of the first heat seal roller and the peripheral surface of the heat-pressed protrusion is the heat-pressed surface facing the heat-sealed surface of the first heat seal roller, and the width of the heat-pressed surface of the heat-pressed protrusion of the second heat seal roller is set to a width that is a certain dimension larger than the width of the heat-pressed surface of the heat-pressed protrusion of the first heat seal roller.

[0093] Alternatively, the present invention can be understood as an invention of a laminated paper, a method for manufacturing laminated paper, or an apparatus for manufacturing laminated paper, as described below.

[0094] First, the present invention can also be understood as a laminated paper comprising a pair of crepe papers as outer layer sheets and a heat-sealable intermediate layer sheet arranged in a laminated state between the crepe papers, the crepe paper being heat-sealed to the intermediate layer sheet by a row of linear heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, a printed portion being provided on the inner surface of the intermediate layer sheet or the crepe paper, and the thickness of the crepe paper being set to a thickness such that the printed portion can be seen from the outside through the crepe paper when the crepe paper is in a wet state.

[0095] Furthermore, the above invention can also be understood as a laminated paper, characterized in that the intermediate layer sheet is made of a material on which the printed portion can be printed and which can be heat-sealed and bonded to the crepe paper as the outer layer sheet in the heat-sealing portion row, and the printed portion is provided on the surface of the nonwoven fabric facing one of the crepe papers as the outer layer sheets.

[0096] Furthermore, the above invention can also be understood as a laminated paper characterized in that the printed portion is provided on the inner surface of one of the crepe papers serving as the outer layer sheets.

[0097] The above invention can also be understood as a laminated paper characterized in that the intermediate layer sheet is made of a non-permeable sheet made of synthetic resin that blocks the passage of moisture and / or oil, and the printed portion is provided on the non-permeable sheet serving as the intermediate layer sheet.

[0098] In the above invention, the nonwoven fabric has a basis weight of 15 to 25 g / m 2 The laminated paper may also be characterized as having a thickness within the range of 100 mm to 150 mm.

[0099] In addition, the crepe paper has a thickness of 20 to 50 g / m 2 The laminated paper may also be characterized as having a thickness within the range of 100 mm to 150 mm.

[0100] The above invention can also be understood as a laminated paper characterized in that the widthwise heat-sealed portion spacing, which is the spacing between the widthwise centerlines of adjacent rows of heat-sealed portions, is set to any value within a predetermined range depending on the range of the crepe rate of the crepe paper, and when the crepe rate of the crepe paper is within the range of 20% to 26%, the widthwise heat-sealed portion spacing is set within the range of 10 mm to 15 mm, and when the crepe rate of the crepe paper is within the range of 26% to 30%, the widthwise heat-sealed portion spacing is set within the range of 15 mm to 25 mm.

[0101] The present invention can also be understood as a method for manufacturing laminated paper of the above-mentioned invention, characterized in that the intermediate layer sheet is made of nonwoven fabric, and in order to compensate for shrinkage that occurs during printing of the printed portion on the nonwoven fabric raw material sheet that serves as the raw material sheet for the nonwoven fabric, a nonwoven fabric raw material sheet having a width that is a predetermined percentage larger than the width of the laminated paper to be actually obtained is used, depending on the shrinkage rate.

[0102] The present invention can also be understood as a laminated paper manufacturing apparatus according to the above invention, comprising a pair of first and second heat seal rollers for forming the row of heat-sealed portions, the first heat seal roller having a convex heat-sealed protrusion corresponding to the heat-sealed portion and having the peripheral surface of the heat-sealed protrusion as a heat-sealed surface, the second heat seal roller having a convex heat-sealed protrusion facing the heat-sealed protrusion of the first heat seal roller and having the peripheral surface of the heat-sealed protrusion as a heat-sealed surface facing the heat-sealed surface of the first heat seal roller, and the width of the heat-sealed surface of the heat-sealed protrusion of the second heat seal roller is set to a width that is a certain dimension larger than the width of the heat-sealed surface of the heat-sealed protrusion of the first heat seal roller.

[0103] Now, to explain another aspect of the present invention, the laminated paper according to a first aspect of the present invention comprises a pair of crepe papers as outer layer sheets and a nonwoven fabric as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and the crepe paper is heat-sealed to the intermediate layer sheet by a row of linear heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, the crepe rate of the crepe paper is set within a range of 20% to 30%, and the widthwise heat-sealed portion spacing of the row of heat-sealed portions is set within a range of 10 mm to 25 mm, and within the widthwise heat-sealed portion spacing range, the widthwise heat-sealed portion spacing is increased in proportion to the increase in the crepe rate of the crepe paper.

[0104] Further, to explain another aspect of the present invention, a laminated paper according to a second aspect of the present invention comprises a pair of crepe papers as outer layer sheets and a nonwoven fabric as a heat-sealable intermediate layer sheet arranged in a laminated state between the pair of crepe papers, and the crepe paper is heat-sealed to the intermediate layer sheet by a linear row of heat-sealed portions extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure, and when the crepe rate of the crepe paper is within a range of 20% to 26%, the widthwise heat-sealed portion spacing of the row of heat-sealed portions is set within a range of 10 mm to 15 mm, and when the crepe rate of the crepe paper is within a range of 26% to 30%, the widthwise heat-sealed portion spacing of the row of heat-sealed portions is set within a range of 15 mm to 25 mm, and within the range of the widthwise heat-sealed portion spacing, the widthwise heat-sealed portion spacing is increased in proportion to the increase in the crepe rate of the crepe paper. [Industrial Applicability]

[0105] The laminated paper, the method for manufacturing the laminated paper, and the apparatus for manufacturing the laminated paper of the present invention can be suitably applied to the application of paper towel products. In the case of paper towel products, they can be applied to paper towel products folded in half, folded in thirds, folded in fourths, folded like a gate, etc., but in addition to this, the rolled base paper can also be manufactured as is and used as base paper for automatic paper towel manufacturing machines, and in addition to paper towel products, they can also be applied to hygiene products used for purposes such as care and nursing. [Explanation of symbols]

[0106] 1: Crepe paper, 2: Nonwoven fabric (heat-sealing sheet) 10, 40, 50, 60, 70, 80: Laminated paper 11, 12, 41, 42, 51, 61, 82: Heat-sealed parts 11a,12a,41a,42a,51a,61a,82a:Dash point 11b, 12b, 41b, 42b, 51b, 61b, 82b: Non-fused part 30: Second heat seal roller (heat seal roller) 31: First heat seal part (heat seal part) 32: Second heat seal section (heat seal section) 31a, 32a: pressing protrusions, 31b, 32b: non-pressing portions

Claims

1. A method for producing a product obtained by processing a laminated paper, comprising the steps of: The laminated paper is A pair of crepe papers as outer layer sheets; a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers; The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a range of 20% to 30%, and the widthwise spacing of the heat-sealed portions of the heat-sealed portion row is set within a range of 10 mm to 25 mm; The method for producing the product comprises the steps of: A method for manufacturing a product obtained by processing a laminated paper, characterized in that, when the product has a different crepe rate of the crepe paper of the laminated paper, the spacing between the heat-sealed portions in the width direction of the laminated paper is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the spacing between the heat-sealed portions in the width direction.

2. A method for producing a product obtained by processing a laminated paper, comprising the steps of: The laminated paper is A pair of crepe papers as outer layer sheets; a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers; The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; When the crepe rate of the crepe paper is within a range of 20% to 26%, the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set within a range of 10 mm to 15 mm; When the crepe rate of the crepe paper is within a range of 26% to 30%, the widthwise spacing of the heat-sealed portions of the heat-sealed portion row is set within a range of 15 to 25 mm; The method for producing the product comprises the steps of: A method for manufacturing a product obtained by processing a laminated paper, characterized in that, when the product has a different crepe rate of the crepe paper of the laminated paper, the spacing between the heat-sealed portions in the width direction of the laminated paper is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the spacing between the heat-sealed portions in the width direction.

3. A laminated paper manufacturing apparatus used to manufacture the laminated paper in the method for manufacturing the product according to claim 1, comprising: The laminated paper manufacturing apparatus includes: a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A laminated paper manufacturing apparatus used to manufacture the laminated paper in the product manufacturing method described in claim 1, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-bonded surfaces of the heat-bonded protrusions in each row is set to the same dimension as the heat-sealed portion spacing of the laminated paper, and when the laminated paper is produced as a product having a different crepe rate of the crepe paper, if the laminated paper increases the width-wise heat-sealed portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-sealed portion spacing, the gap spacing between adjacent heat-sealed surfaces of the heat-sealed protrusions also increases correspondingly.

4. A laminated paper manufacturing apparatus used to manufacture the laminated paper in the method for manufacturing the product according to claim 2, comprising: The laminated paper manufacturing apparatus includes: a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A laminated paper manufacturing apparatus used to manufacture the laminated paper in the product manufacturing method described in claim 2, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminated paper, and when the laminated paper is produced as a product having a different crepe rate of the crepe paper, if the laminated paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-sealed portion spacing, the gap spacing between adjacent heat-pressed surfaces of the heat-sealed protrusions also increases correspondingly.

5. A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the manufacturing method of the product according to claim 1, The heat seal roller of the laminated paper manufacturing apparatus is a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the product manufacturing method described in claim 1, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminated paper, and when the laminated paper is produced as a product with a different crepe rate of the crepe paper, if the laminated paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions is also configured to increase correspondingly.

6. A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the manufacturing method of the product according to claim 2, The heat seal roller of the laminated paper manufacturing apparatus is a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the product manufacturing method described in claim 2, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminated paper, and when the laminated paper is produced as a product with a different crepe rate of the crepe paper, if the laminated paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions also increases correspondingly.

7. A method for producing laminated paper, comprising: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing the laminated paper comprises: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a predetermined range, and the interval between the heat-sealed portions in the width direction of the heat-sealed portion row is set within a predetermined range; A method for manufacturing laminated paper, characterized in that when the crepe rate of the crepe paper is different, the widthwise heat-sealed portion spacing is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the widthwise heat-sealed portion spacing.

8. A method for producing laminated paper, comprising: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing the laminated paper comprises: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; the crepe rate of the crepe paper is set within a predetermined first crepe rate range or a predetermined second crepe rate range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set within a predetermined first width range corresponding to the first crepe rate range or a predetermined second width range corresponding to the second crepe rate range; A method for manufacturing laminated paper, characterized in that when the crepe rate of the crepe paper is different, the widthwise heat-sealed portion spacing is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the widthwise heat-sealed portion spacing.

9. A method for producing a product obtained by processing a laminated paper, comprising the steps of: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing a product obtained by processing the laminated paper includes the steps of: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a predetermined range, and the interval between the heat-sealed portions in the width direction of the heat-sealed portion row is set within a predetermined range; A method for manufacturing a product obtained by processing a laminated paper, characterized in that, when the product has a different crepe rate of the crepe paper of the laminated paper, the spacing between the heat-sealed portions in the width direction of the laminated paper is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the spacing between the heat-sealed portions in the width direction.

10. A method for producing a product obtained by processing a laminated paper, comprising the steps of: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing a product obtained by processing the laminated paper includes the steps of: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; the crepe rate of the crepe paper is set within a predetermined first crepe rate range or a predetermined second crepe rate range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set within a predetermined first width range corresponding to the first crepe rate range or a predetermined second width range corresponding to the second crepe rate range; A method for manufacturing a product obtained by processing a laminated paper, characterized in that, when the product has a different crepe rate of the crepe paper of the laminated paper, the spacing between the heat-sealed portions in the width direction of the laminated paper is increased in proportion to the increase in the crepe rate of the crepe paper within the range of the spacing between the heat-sealed portions in the width direction.

11. A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 7, The laminated paper manufacturing apparatus includes: a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method described in claim 7, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminated paper, and when the laminated paper has a different crepe rate of the crepe paper, if the laminated paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions also increases correspondingly.

12. A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 8, The laminated paper manufacturing apparatus includes: a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A laminated paper manufacturing apparatus used to manufacture the product laminated paper in the laminated paper manufacturing method described in claim 8, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-bonded surfaces of the heat-bonded protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminated paper, and when the laminated paper has a different crepe rate of the crepe paper, if the laminated paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-bonded surfaces of the heat-bonded protrusions also increases correspondingly.

13. A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 7, The heat seal roller of the laminated paper manufacturing apparatus is a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A heat seal roller of a laminate paper manufacturing device used to manufacture the product laminate paper in the laminate paper manufacturing method described in claim 7, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminate paper, and when the laminate paper has a different crepe rate of the crepe paper, when the laminate paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions is also configured to increase correspondingly.

14. A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 8, The heat seal roller of the laminated paper manufacturing apparatus is a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A heat seal roller of a laminate paper manufacturing apparatus used to manufacture the laminate paper in the laminate paper manufacturing method described in claim 8, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminate paper, and when the laminate paper has a different crepe rate of the crepe paper, if the laminate paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions also increases correspondingly.

15. A method for producing laminated paper, comprising: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing the laminated paper comprises: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a predetermined crepe rate range, and the interval between the heat-sealed portions in the width direction of the row of heat-sealed portions is set within a predetermined interval between the heat-sealed portions; The crepe rate of the crepe paper is set to a predetermined crepe rate within the predetermined crepe rate range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set to a predetermined heat-sealed portion spacing within the predetermined heat-sealed portion spacing range of 10 mm to 25 mm; A method for manufacturing laminated paper, characterized in that when the crepe rate of the crepe paper is different, the heat-sealed portion spacing is set to a value that increases in proportion to the increase in the crepe rate of the crepe paper, within the specified heat-sealed portion spacing range of the heat-sealed portion spacing in the width direction.

16. A method for producing laminated paper, comprising: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing the laminated paper comprises: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a predetermined crepe rate range, and the interval between the heat-sealed portions in the width direction of the row of heat-sealed portions is set within a predetermined interval between the heat-sealed portions; The crepe rate of the crepe paper is set to a predetermined value within the range of 20% to 40% as the predetermined crepe rate range, and the widthwise spacing of the heat-sealed portions of the heat-sealed portion row is set to a predetermined value within the predetermined spacing range of the heat-sealed portions; A method for manufacturing laminated paper, characterized in that when the crepe rate of the crepe paper is different, the heat-sealed portion spacing is set to a value that increases in proportion to the increase in the crepe rate of the crepe paper, within the specified heat-sealed portion spacing range of the heat-sealed portion spacing in the width direction.

17. A method for producing laminated paper, comprising: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing the laminated paper comprises: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a predetermined crepe rate range, and the interval between the heat-sealed portions in the width direction of the row of heat-sealed portions is set within a predetermined interval between the heat-sealed portions; The crepe rate of the crepe paper is set to a predetermined value within the range of 20% to 40% as the predetermined crepe rate range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set to a predetermined value within the range of 10 mm to 25 mm as the predetermined spacing range of the heat-sealed portions; A method for manufacturing laminated paper, characterized in that when the crepe rate of the crepe paper is different, the heat-sealed portion spacing is set to a value that increases in proportion to the increase in the crepe rate of the crepe paper, within the specified heat-sealed portion spacing range of the heat-sealed portion spacing in the width direction.

18. A method for producing a product obtained by processing a laminated paper, comprising the steps of: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing a product obtained by processing the laminated paper includes the steps of: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a predetermined crepe rate range, and the interval between the heat-sealed portions in the width direction of the row of heat-sealed portions is set within a predetermined interval between the heat-sealed portions; The crepe rate of the crepe paper is set to a predetermined crepe rate within the predetermined crepe rate range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set to a predetermined heat-sealed portion spacing within the predetermined heat-sealed portion spacing range of 10 mm to 25 mm; A method for manufacturing a product obtained by processing laminated paper, characterized in that when the product is one in which the crepe rate of the crepe paper of the laminated paper is different, the heat-sealed portion spacing in the laminated paper is set to a value that increases in proportion to the increase in the crepe rate of the crepe paper, within the specified heat-sealed portion spacing range of the heat-sealed portion spacing in the width direction.

19. A method for producing a product obtained by processing a laminated paper, comprising the steps of: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing a product obtained by processing the laminated paper includes the steps of: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a predetermined crepe rate range, and the interval between the heat-sealed portions in the width direction of the row of heat-sealed portions is set within a predetermined interval between the heat-sealed portions; The crepe rate of the crepe paper is set to a predetermined value within the range of 20% to 40% as the predetermined crepe rate range, and the widthwise spacing of the heat-sealed portions of the heat-sealed portion row is set to a predetermined value within the predetermined spacing range of the heat-sealed portions; A method for manufacturing a product obtained by processing laminated paper, characterized in that when the product is one in which the crepe rate of the crepe paper of the laminated paper is different, the heat-sealed portion spacing in the laminated paper is set to a value that increases in proportion to the increase in the crepe rate of the crepe paper, within the specified heat-sealed portion spacing range of the heat-sealed portion spacing in the width direction.

20. A method for producing a product obtained by processing a laminated paper, comprising the steps of: The laminated paper is The crepe paper that matches the and a nonwoven fabric as a heat-sealable intermediate layer sheet disposed in a laminated state between the pair of crepe papers, The method for producing a product obtained by processing the laminated paper includes the steps of: The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction perpendicular to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure; The crepe rate of the crepe paper is set within a predetermined crepe rate range, and the interval between the heat-sealed portions in the width direction of the row of heat-sealed portions is set within a predetermined interval between the heat-sealed portions; The crepe rate of the crepe paper is set to a predetermined value within the range of 20% to 40% as the predetermined crepe rate range, and the widthwise spacing of the heat-sealed portions of the row of heat-sealed portions is set to a predetermined value within the range of 10 mm to 25 mm as the predetermined spacing range of the heat-sealed portions; A method for manufacturing a product obtained by processing laminated paper, characterized in that when the product is one in which the crepe rate of the crepe paper of the laminated paper is different, the heat-sealed portion spacing in the laminated paper is set to a value that increases in proportion to the increase in the crepe rate of the crepe paper, within the specified heat-sealed portion spacing range of the heat-sealed portion spacing in the width direction.

21. A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 15, The laminated paper manufacturing apparatus includes: a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method described in claim 15, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminated paper, and when the laminated paper has a different crepe rate of the crepe paper, if the laminated paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions also increases correspondingly.

22. A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 16, The laminated paper manufacturing apparatus includes: a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method described in claim 16, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminated paper, and when the laminated paper has a different crepe rate of the crepe paper, if the laminated paper increases the heat-fused portion spacing in the width direction in proportion to an increase in the crepe rate of the crepe paper within the range of the heat-fused portion spacing in the width direction, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions also increases correspondingly.

23. A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 17, The laminated paper manufacturing apparatus includes: a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method described in claim 17, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminated paper, and when the laminated paper has a different crepe rate of the crepe paper, if the laminated paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-pressed surfaces of the heat-pressed protrusions also increases correspondingly.

24. A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 15, The heat seal roller of the laminated paper manufacturing apparatus is a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A heat seal roller of a laminate paper manufacturing apparatus used to manufacture the laminate paper in the laminate paper manufacturing method described in claim 15, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminate paper, and when the laminate paper has a different crepe rate of the crepe paper, if the laminate paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions also increases correspondingly.

25. A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 16, The heat seal roller of the laminated paper manufacturing apparatus is a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A heat seal roller of a laminate paper manufacturing apparatus used to manufacture the laminate paper in the laminate paper manufacturing method described in claim 16, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminate paper, and when the laminate paper has a different crepe rate of the crepe paper, if the laminate paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions also increases correspondingly.

26. A heat seal roller of a laminated paper manufacturing apparatus used to manufacture the laminated paper in the laminated paper manufacturing method according to claim 17, The heat seal roller of the laminated paper manufacturing apparatus is a pair of first and second heat seal rollers for forming a row of heat-sealed portions of the laminated paper; the first heat seal roller has a ridge-shaped heat-sealing protrusion corresponding to the heat-sealing portion row of the laminated paper, and a peripheral surface of the heat-sealing protrusion serves as a heat-sealing surface; the second heat seal roller has a convex stripe-shaped heat compression protrusion facing the heat compression protrusion of the first heat seal roller, and a peripheral surface of the heat compression protrusion serves as a heat compression surface facing the heat compression surface of the first heat seal roller; A heat seal roller of a laminate paper manufacturing apparatus used to manufacture the laminate paper in the laminate paper manufacturing method described in claim 17, characterized in that in the first heat seal roller, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions in each row is set to the same dimension as the heat-fused portion spacing of the laminate paper, and when the laminate paper has a different crepe rate of the crepe paper, if the laminate paper increases the width-wise heat-fused portion spacing in proportion to an increase in the crepe rate of the crepe paper within the range of the width-wise heat-fused portion spacing, the gap spacing between adjacent heat-compressed surfaces of the heat-compressed protrusions is also configured to increase correspondingly.

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