Method of manufacturing a toilet paper roll

Abstract

Provided is a method for manufacturing a toilet paper roll that prevents the layers of the toilet paper from peeling off when the toilet paper is torn, and that maintains good appearance. The method includes a step of bonding a raw paper (10a) and a raw paper (11a) to form a layered paper (101); a step of bonding a raw paper (13a) and a raw paper (12a) to form a layered paper (102); and a step of spraying an adhesive liquid to the layered paper (101) and the layered paper (102), and applying pressure to the layered paper (101) and the layered paper (102) in a state where the layered paper (101) and the layered paper (102) are overlapped by a press roller (23c) to form a four-layered toilet paper (200).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a manufacturing method of a four-layered toilet paper roll in which four sheets of paper are stacked and wound. BACKGROUND

[0002] Conventionally, a (single-layered) toilet paper roll in which one sheet of paper is wound and a two-layered toilet paper roll in which two sheets of raw paper are stacked and wound are generally manufactured and sold.

[0003] Further, a toilet paper roll in which three or more sheets of paper are stacked and wound for the purpose of improving water absorption is also manufactured and sold.

[0004] In addition, in the case where three or more sheets of paper are stacked as described above, the thickness of the stacked paper becomes quite thick, and thus it is difficult to tear the portion pulled out from the paper roll.

[0005] Sometimes, a needle eye is provided at a certain interval on a paper roll in which three or more sheets of paper are stacked, and the stacked paper pulled out from the paper roll is configured to be easily torn.

[0006] For example, in the case of manufacturing a three-layered toilet paper roll, sometimes, a layer on the front side and at least one layer on the middle layer are adhered using paste, micro embossing is formed on the two layers on the back side, and they are stacked, thereby making each layer difficult to peel. Further, in the case of manufacturing a four-layered toilet paper roll, decorative embossing is formed on the two layers on the front side, and micro embossing is formed on the two layers on the back side. Sometimes, one layer on the back side among at least the two layers on the front side and one layer on the front side among at least the two layers on the back side are adhered using paste (Patent Literature 1).

[0007] The above-described four-layered toilet paper roll adheres two layers among the four layers that become the middle layer by paste. Further, large decorative embossing is formed on the two layers among the four layers that are arranged on the outer side, and the micro embossing formed on the two layers (middle layer) adhered by the paste and the above-described decorative embossing are strongly abutted to be stacked so as to be difficult to peel.

[0008] Further, the above-described four-layered toilet paper roll sometimes forms decorative embossing on one layer on the front side, forms micro embossing on three layers on the back side, and adheres one layer on the front side and the layer that is the second layer from the front side using paste.

[0009] PRIOR ART DOCUMENT

[0010] PATENT LITERATURE

[0011] Patent Literature 1: Japanese Patent Application Publication No. 2018-23561 SUMMARY

[0012] PROBLEMS TO BE SOLVED BY THE INVENTION

[0013] For a four-layered toilet paper roll manufactured by stacking a plurality of papers as described above, there is a portion where the papers are stacked by strongly abutting embossing of different sizes without using a liquid such as water or paste for adhesion. Thus, in a state where the toilet paper roll is installed on a toilet paper holder, in the case where the toilet paper is torn to a desired length, the stacked papers sometimes peel off from the torn end. In a state where the papers stacked as such are peeled off, if they are exposed from the toilet paper holder, the appearance deteriorates.

[0014] The present disclosure is made in view of the above-described problems, and provides a manufacturing method of a toilet paper roll in which, when a paper pulled out from a four-layered toilet paper roll is torn, the layers of the paper can be prevented from peeling off, and the appearance can be maintained to be good.

[0015] Solution for solving the problem

[0016] The manufacturing method of a toilet paper roll according to the present disclosure is characterized by comprising: a first step of pulling out a plurality of original papers from a plurality of original paper rolls; a second step of introducing the plurality of original papers to a stacking portion, and stacking the plurality of original papers to form a four-layered toilet paper; a third step of drying the four-layered toilet paper; and a fourth step of winding the four-layered toilet paper to manufacture a four-layered toilet paper roll, wherein the second step comprises: a fifth step of separating the plurality of original papers introduced to the stacking portion into a plurality of single-layer original papers; a sixth step of spraying an adhesion liquid between a first original paper and a second original paper among the plurality of single-layer original papers by a first sprayer to form a first stacked paper from the first original paper and the second original paper; a seventh step of spraying the adhesion liquid between a third original paper and a fourth original paper among the plurality of single-layer original papers by a second sprayer to form a second stacked paper from the third original paper and the fourth original paper; and an eighth step of spraying the adhesion liquid between the first stacked paper and the second stacked paper by a third sprayer, and applying pressure to the first stacked paper and the second stacked paper to overlap each other by a first pressing roller to form the four-layered toilet paper, and the sixth step and the seventh step are performed simultaneously.

[0017] Further, it is characterized in that, in the sixth step, after the adhesion liquid is attached to the first original paper and the second original paper, pressure is applied to the first original paper and the second original paper to overlap each other by a second pressing roller, and in the seventh step, after the adhesion liquid is attached to the third original paper and the fourth original paper, pressure is applied to the third original paper and the fourth original paper to overlap each other by a third pressing roller.

[0018] Further, it is characterized in that, in the above-mentioned 8th step, the amount of the above-mentioned adhesive liquid, which is sprayed from the above-mentioned 2nd sprayer to expand the fibers of the above-mentioned first layered paper and the fibers of the above-mentioned second layered paper, is pressed by the above-mentioned 1st pressing roller to discharge the moisture of the above-mentioned adhesive liquid from the fibers of the above-mentioned first layered paper and the fibers of the above-mentioned second layered paper.

[0019] Inventive Effects

[0020] According to the present disclosure, when the paper pulled out from the four-layered toilet paper roll is torn, peeling of each layer of the paper can be prevented, and the appearance can be maintained in good condition. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a explanatory diagram showing a schematic configuration of a paper roll manufacturing apparatus using a manufacturing method of a toilet paper roll according to an embodiment of the present disclosure.

[0022] Figure 2 is a explanatory diagram showing a schematic configuration of a layered portion of the toilet paper roll manufacturing apparatus of Figure 1 .

[0023] Figure 3 is a explanatory diagram showing a schematic configuration of a layered portion of the toilet paper roll manufacturing apparatus of Figure 1 . DETAILED DESCRIPTION

[0024] Hereinafter, one embodiment of the present disclosure will be described.

[0025] (Embodiment)

[0026] Figure 1 is a explanatory diagram showing a schematic configuration of a toilet paper roll manufacturing apparatus 1 using a manufacturing method of a toilet paper roll according to an embodiment of the present disclosure.

[0027] The toilet paper roll manufacturing apparatus 1 is configured to manufacture a four-layered toilet paper roll 300.

[0028] The toilet paper roll manufacturing apparatus 1, for example, has a guide roller 2 that moves the original papers 10a, 11a, 12a, 13a pulled out from the original paper rolls 10, 11, 12, 13, respectively, to a layered portion 20, and the layered portion 20 that overlaps the original papers 10a, 11a, 12a, 13a to form a four-layered toilet paper 200.

[0029] Further, the toilet paper roll manufacturing apparatus 1 has a drying portion 30 that dries the four-layered toilet paper 200, and a winding portion 40 that winds the four-layered toilet paper 200 after drying to form a four-layered toilet paper roll 300.

[0030] In addition, the base paper 10a, base paper 11a, base paper 12a and base paper 13a shown here are all single-layer base papers.

[0031] Figure 1 The illustrated toilet paper roll manufacturing apparatus 1 is configured to manufacture a four-layer toilet paper roll 300 using single-layer base paper 10a, base paper 11a, base paper 12a, and base paper 13a.

[0032] Figure 1 The toilet paper roll manufacturing apparatus 1 is provided with a plurality of guide rollers 2, for example, in a manner in which the paper 10a pulled from the paper roll 10 overlaps with the paper 11a pulled from the paper roll 11 and is also in a manner in which the paper 12a pulled from the paper roll 12 overlaps with the paper 13a pulled from the paper roll 13 and is thus introduced into the stacking section 20.

[0033] Figure 2 It is shown Figure 1 An explanatory diagram illustrating the schematic structure of the laminating section 20 of the toilet paper roll manufacturing apparatus 1.

[0034] The lamination section 20 includes: a sprayer 22a for spraying water or an aqueous solution containing fragrance or deodorizing ingredients, etc., onto the overlapping portion of the base paper 10a and base paper 11a; and a sprayer 22b for spraying the adhesive liquid onto the overlapping portion of the base paper 12a and base paper 13a. Furthermore, by configuring the sprayer to spray water from either of the sprayers 22a and 22b, and to spray an aqueous solution, for example, containing fragrance ingredients, from the other, the concentration of the aqueous solution can be controlled.

[0035] The laminating section 20 is provided with a plurality of guide rollers 21 so as to separate the base paper 10a and base paper 11a that overlap when introduced into the laminating section 20, so that the surfaces of the base paper 10a and base paper 11a that are in contact in the overlapping state are sprayed toward the space position of the sprayer 22a to spray the adhesive liquid, thereby moving the base paper 10a and base paper 11a.

[0036] Furthermore, the laminating section 20 is equipped with a plurality of guide rollers 21 so as to separate the base paper 12a and base paper 13a that overlap when introduced into the laminating section 20, so that the surfaces of the base paper 12a and base paper 13a that are in contact in the overlapping state are directed toward the space position where the adhesive liquid is sprayed onto the sprayer 22b, thereby moving the base paper 10a and base paper 11a.

[0037] The laminating section 20 is located in the space where the adhesive liquid is sprayed by the sprayer 22a (or nearby) and is equipped with a pressing roller 23a that presses the base paper 10a and the base paper 11a together to overlap. The laminating section 20 is located in the space where the adhesive liquid is sprayed by the sprayer 22b (or nearby) and is equipped with a pressing roller 23b that presses the base paper 12a and the base paper 13a together to overlap.

[0038] Furthermore, the laminating section 20 is equipped with a sprayer 22c, which sprays an adhesive liquid onto the surfaces that abut when the laminated paper 101 formed by the pressing roller 23a and the laminated paper 102 formed by the pressing roller 23b overlap.

[0039] Furthermore, the laminating section 20 is equipped with a plurality of guide rollers 21 that move the laminated paper 101 and laminated paper 102 toward the sprayer 22c to spray adhesive liquid, and at the space position (or near) where the sprayer 22c sprays adhesive liquid, there is a pressing roller 23c that presses the laminated paper 101 and laminated paper 102 together.

[0040] Next, the operation of the toilet paper roll manufacturing device 1 will be explained.

[0041] Figure 1 For example, the toilet paper roll manufacturing apparatus 1 pulls out long strips of raw paper 10a, 11a, 12a, and 13a from four raw paper rolls 10, 11, 12, and 13 respectively, and transfers them to the stacking section 20 using multiple guide rollers 2.

[0042] The laminating section 20, as described later, allows the adhesive liquid to adhere to and be laminated onto the base paper 10a, 11a, 12a, and 13a introduced by each guide roller 2, forming a long strip of four-layer toilet paper 200.

[0043] The four-layer toilet paper 200 formed by the lamination section 20 is introduced from the lamination section 20 to the drying section 30.

[0044] The drying section 30, for example, has multiple cylinders inside. The four-layer toilet paper 200 introduced into the drying section 30 is heated by passing through each of the cylinders to dry the four-layer toilet paper 200.

[0045] The four-ply toilet paper 200, dried by the drying section 30, is fed into the winding section 40.

[0046] The winding section 40 uses the winding press roller 42 and a plurality of winding rollers 43 to wind the four-ply toilet paper 200 that is introduced into the winding section 40 to produce a four-ply toilet paper roll 300.

[0047] Furthermore, the winding section 40 is equipped with a cutter 41, which cuts the four-ply toilet paper 200 that has been introduced into the winding section 40 after the four-ply toilet paper 200 of a specified length has been wound by the winding press roller 42 and the winding roller 43.

[0048] The winding section 40 winds the four layers of toilet paper 200 that are sequentially fed in. Then, as described above, the four layers of toilet paper 200 are cut by the cutter 41. This operation is repeated to produce a four-layer toilet paper roll 300.

[0049] Alternatively, the winding section 40 may be equipped with a cutter (not shown) that forms pinholes in the width direction of the four-ply toilet paper 200, forming pinholes in the four-ply toilet paper 200 at predetermined intervals, thereby manufacturing a four-ply toilet paper roll 300 with the pinholes.

[0050] Figure 2 It is shown Figure 1 An explanatory diagram illustrating the schematic structure of the laminating section 20 of the toilet paper roll manufacturing apparatus 1.

[0051] For example, the toilet paper roll manufacturing apparatus 1 is configured such that the aforementioned guide rollers 2 guide the raw paper 10a and raw paper 11a to the lamination section 20 in an overlapping manner, and further, the guide rollers 2 guide the raw paper 12a and raw paper 13a to the lamination section 20 in an overlapping manner.

[0052] The lamination section 20 has multiple guide rollers 21 and sprayers 22a, 22b, and 22c for spraying the aforementioned adhesive liquid.

[0053] Furthermore, as described later, the laminating section 20 includes: a pressing roller 23a that applies pressure to the overlapping base paper 10a and base paper 11a; a pressing roller 23b that applies pressure to the overlapping base paper 12a and base paper 13a; and a pressing roller 23c that applies pressure to the overlapping laminated paper 101 and laminated paper 102.

[0054] If the stacking section 20 is guided by the guide roller 2 to the overlapping base paper 10a and 11a as described above, the base paper 10a and base paper 11a are separated by multiple guide rollers 21 and moved to the vicinity of the sprayer 22a respectively.

[0055] The aforementioned guide rollers 21, for example, transport the base paper 10a and the base paper 11a in such a way that the back side of the base paper 10a and the front side of the base paper 11a face each other at the spatial position where the adhesive liquid is sprayed from the sprayer 22a. In other words, the guide rollers 21 transport the base paper 10a and the base paper 11a in such a way that the back side of the base paper 10a and the front side of the base paper 11a face the part from which the adhesive liquid is sprayed from the sprayer 22a.

[0056] The sprayer 22a sprays (attaches) the adhesive liquid onto the base paper 10a and base paper 11a, which have been moved to a spatial position where the sprayed adhesive liquid can adhere, for example, towards the back of the base paper 10a and the front of the base paper 11a.

[0057] At this time, the sprayer 22a sprays the following amount of adhesive liquid: by the adhering adhesive liquid, the fibers on the back side of the base paper 10a are expanded, and the fibers on the front side of the base paper 11a are expanded, so that when the base paper 10a and the base paper 11a are overlapped, these fibers can be entangled with each other.

[0058] The laminating section 20 is provided with a pressing roller 23a, for example, in the space where the adhesive liquid is sprayed by the sprayer 22a (or nearby). The pressing roller 23a brings the back side of the base paper 10a, which is respectively coated with the adhesive liquid, into contact (overlaps) with the front side of the base paper 11a, clamps the base paper 10a and the base paper 11a, and applies pressure, for example, to discharge the adhesive liquid (water) that has permeated the base paper 10a and the base paper 11a to the outside.

[0059] In other words, by pressing, the adhesive liquid (water) that expands the fibers on the back side of the base paper 10a and the adhesive liquid (water) that expands the fibers on the front side of the base paper 11a are discharged from between the fibers respectively. These fibers intertwine with each other to form a laminated paper 101 of two layers of base paper 10a and base paper 11a bonded together.

[0060] Furthermore, if the stacking section 20 is guided by the guide roller 2 to the overlapping base paper 12a and 13a as described above, the base paper 12a and base paper 13a are separated by multiple guide rollers 21 and moved to the vicinity of the sprayer 22b respectively.

[0061] The aforementioned guide rollers 21, for example, transport the base paper 13a and the base paper 12a in such a way that the back side of the base paper 13a and the front side of the base paper 12a face each other at the spatial position where the adhesive liquid is sprayed from the sprayer 22b. In other words, these guide rollers 21 transport the base paper 13a and the base paper 12a in such a way that the back side of the base paper 13a and the front side of the base paper 12a face the area where the adhesive liquid is sprayed from the sprayer 22b.

[0062] The sprayer 22b sprays (attaches) the adhesive liquid onto the base paper 13a and base paper 12a, which have been moved to a spatial position where the sprayed adhesive liquid can adhere, for example, towards the back of the base paper 13a and the front of the base paper 12a.

[0063] At this time, the sprayer 22b sprays the following amount of adhesive liquid: by the adhering adhesive liquid, the fibers on the back side of the base paper 13a are expanded, and the fibers on the front side of the base paper 12a are expanded, so that when the base paper 13a and the base paper 12a overlap, these fibers can be entangled with each other.

[0064] The laminating section 20 is provided with a pressing roller 23b, for example, in the space where the adhesive liquid is sprayed by the sprayer 22b (or nearby). The pressing roller 23b brings the back side of the base paper 13a, which is respectively coated with the adhesive liquid, into contact (overlaps) with the front side of the base paper 12a, clamps the base paper 13a and the base paper 12a, and applies pressure, for example, to cause the adhesive liquid (water) that has permeated the base paper 13a and the base paper 12a to be discharged to the outside.

[0065] In other words, by pressing, the adhesive liquid (water) that expands the fibers on the back side of the base paper 13a and the adhesive liquid (water) that expands the fibers on the front side of the base paper 12a are discharged from between the fibers respectively. These fibers intertwine with each other to form a laminated paper 102 of two layers of base paper 13a and base paper 12a bonded together.

[0066] In addition, the laminating section 20 may simultaneously perform, for example, the forming process of forming laminated paper 101 using sprayer 22a, pressing roller 23a, etc.; and the forming process of forming laminated paper 102 using sprayer 22b, pressing roller 23b, etc.

[0067] The laminated paper 101 formed by the pressing roller 23a and the laminated paper 102 formed by the pressing roller 23b are respectively conveyed by a plurality of guide rollers 21 to the spatial positions where adhesive liquid is sprayed from the sprayer 22c. These guide rollers 21 convey the laminated paper 101 and the laminated paper 102 in such a manner that the back side of the laminated paper 101 and the front side of the laminated paper 102 face each other at the spatial positions where adhesive liquid is sprayed from the sprayer 22c. In other words, each guide roller 21 conveys the laminated paper 101 and the laminated paper 102 in such a manner that the back side of the laminated paper 101 and the front side of the laminated paper 102 face the portions from which adhesive liquid is sprayed from the sprayer 22c.

[0068] The sprayer 22c sprays (attaches) the adhesive liquid onto the laminated paper 101 and laminated paper 102, which have been moved to a spatial position where the sprayed adhesive liquid can adhere, for example, towards the back of the laminated paper 101 and the front of the laminated paper 102.

[0069] At this time, the sprayer 22c sprays the following amount of adhesive liquid: by the adhering adhesive liquid, the fibers on the back side of the laminated paper 101 are expanded, and the fibers on the front side of the laminated paper 102 are expanded, so that when the laminated paper 101 and the laminated paper 102 are overlapped, these fibers can be entangled with each other.

[0070] The lamination section 20 is equipped with a pressing roller 23c, for example, at the space where the adhesive liquid is sprayed by the sprayer 22c (or nearby). The pressing roller 23c brings the back side of the laminated paper 101, which is respectively coated with adhesive liquid, into contact (overlaps) with the front side of the laminated paper 102, clamps the laminated paper 101 and the laminated paper 102, and applies pressure, for example, to cause the adhesive liquid (water) that has permeated the laminated paper 101 and the laminated paper 102 to be discharged to the outside.

[0071] In other words, by pressing, the adhesive liquid (water) that expands the fibers between the back side of the laminated paper 101 and the adhesive liquid (water) that expands the fibers between the front side of the laminated paper 102 are discharged from between the fibers respectively. These fibers intertwine with each other to form a four-layer toilet paper 200 in which the laminated paper 101 and the laminated paper 102 are bonded together.

[0072] As described above, the four-ply toilet paper 200 formed by the pressing roller 23c is dried by the drying section 30 and then wound by the winding section 40 to produce a four-ply toilet paper roll 300.

[0073] Figure 3 It is shown Figure 1 This is an explanatory diagram of another structural example of the toilet paper roll manufacturing apparatus 1. The diagram shows the portion of the raw paper 14a, 15a pulled from the raw paper rolls 14, 15 and introduced into the stacking section 20 in another structural example of the toilet paper roll manufacturing apparatus 1.

[0074] Other structural examples of the toilet paper roll manufacturing apparatus 1, such as the stacking section 20, drying section 30, and winding section 40, are similar to... Figure 1 , Figure 2 The structure shown is constructed in the same way.

[0075] For example, the paper roll 14 and paper roll 15 are formed by winding two layers of paper 14a and 15a that are not bonded with adhesive liquid or the like.

[0076] exist Figure 3 In other structural examples shown, the two layers of paper 14a pulled from the paper roll 14 and the two layers of paper 15a pulled from the paper roll 15 are respectively guided by a plurality of guide rollers 2 and introduced into the lamination section 20.

[0077] Figure 3 The stacked part 20 and Figure 2 The stacked portion 20 shown is similarly constructed, for example, separating the base paper 14a into a first single-layer base paper (not shown) equivalent to the base paper 10a and a second single-layer base paper (not shown) equivalent to the base paper 11a, and performing the same processing as the base paper 10a and 11a respectively.

[0078] Furthermore, Figure 3 The lamination section 20 separates the base paper 15a into a third single-layer base paper (not shown) equivalent to base paper 13a and a fourth single-layer base paper (not shown) equivalent to base paper 12a, and performs the same processing as base paper 13a and 12a respectively.

[0079] exist Figure 3 In the stacked section 20, as described above, stacked papers 101 and 102 are formed, thereby forming four layers of toilet paper 200.

[0080] The toilet paper roll manufacturing apparatus 1 described herein can be configured to supply single-layer base paper 10a, 11a, 12a, 13a from base paper rolls 10, 11, 12, 13 to the laminating section 20, and can also be configured to supply two-layer base paper 14a, 15a from base paper rolls 14, 15.

[0081] Explanation of reference numerals in the attached figures

[0082] 1 Toilet paper roll manufacturing apparatus

[0083] 2 guide rollers

[0084] 10 rolls of raw paper

[0085] 10a base paper

[0086] 11 rolls of raw paper

[0087] 11a base paper

[0088] 12 rolls of raw paper

[0089] 12a base paper

[0090] 13 rolls of raw paper

[0091] 13a base paper

[0092] 14 rolls of raw paper

[0093] 14a base paper

[0094] 15 rolls of raw paper

[0095] 15a base paper

[0096] 20-layer stack

[0097] 21 Guide rollers

[0098] 22a, 22b, 22c sprayers

[0099] 23a, 23b, 23c Pressing Rollers

[0100] 30 Drying Section

[0101] 40 Winding section

[0102] 41 Cutter

[0103] 42 Winding Press Rollers

[0104] 43 winding rollers

[0105] 101 and 102 layers of paper

[0106] 200 Four-ply toilet paper

[0107] 300 rolls of four-ply toilet paper

Claims

1. A method for manufacturing a toilet paper roll, characterized in that, The above-mentioned method for manufacturing toilet paper rolls includes: The first step involves pulling out raw paper from multiple rolls of raw paper. In the second step, multiple sheets of the above-mentioned base paper are introduced into the stacking section, so that the multiple sheets of base paper are stacked to form four layers of toilet paper; The third step is to dry the four layers of toilet paper; and The fourth step involves winding the four layers of toilet paper to create a four-ply toilet paper roll. The second process described above has the following characteristics: In the fifth step, the multiple base papers introduced into the above-mentioned stacking section are separated into multiple single-layer base papers; In the sixth step, an adhesive liquid is sprayed from the first sprayer between the first base paper and the second base paper among the plurality of single-layer base papers, and the first base paper and the second base paper form a first layer of paper. In the seventh step, the adhesive liquid is sprayed from the second sprayer between the third and fourth base papers among the plurality of single-layer base papers, forming a second layer of paper from the third and fourth base papers; and In step 8, the adhesive liquid is sprayed between the first and second layers of toilet paper by the third sprayer, and the first pressing roller applies pressure to make the first and second layers of toilet paper overlap, forming the four-layer toilet paper. The above-mentioned steps 6 and 7 are performed simultaneously.

2. The method for manufacturing a toilet paper roll as described in claim 1, characterized in that, In the sixth step described above, after the adhesive liquid is applied to the first base paper and the second base paper, the first base paper and the second base paper are pressed together using the second pressing roller. In the seventh step described above, after the adhesive liquid is applied to the third base paper and the fourth base paper, the third pressing roller is used to press the third base paper and the fourth base paper together.

3. The method for manufacturing a toilet paper roll as described in claim 1 or 2, characterized in that, In the aforementioned eighth process, The second sprayer sprays an amount of the adhesive liquid that, due to penetration by the adhesive liquid, causes the fibers of the first and second layers of paper to expand together. The pressing action is applied by the first pressing roller to expel moisture from between the fibers of the first and second layers of paper.

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