Toilet paper roll

Abstract

To provide a toilet paper roll whose winding length of toilet tissue paper is long and which has a good texture.SOLUTION: A toilet paper roll R winds up toilet tissue paper laminating two sheets to become one sheet of paper. A surface embossment e1 is formed on a surface side sheet S1, a rear surface embossment e2 is formed on a rear surface side sheet S2, the crest part of the rear surface side sheet S2 engages the inside of the crest part of the surface embossment e1 on the surface side sheet S1 engages, and the trough of the surface embossment e1 on the surface side sheet S1 overlaps the trough of the rear surface side sheet S2, and there is no air layer between the surface side sheet S1 and the rear surface sheet S2. The toilet paper roll R whose volume of an embossment part is not large and whose winding length of the paper P is large while limiting a prescribed wound diameter can be provided. Also, the surface embodiment e1 and the rear face embossment e2 are combined by maintaining irregularities, so that the softness of the paper P is maintained.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to toilet paper rolls.

Background Art

[0002] Patent Document 1 discloses toilet paper for shower toilets. Since this toilet paper is used with moisture adhering to the skin, it has a high water absorption capacity required for shower toilets.

[0003] The toilet paper 101 of Patent Document 1 is shown in FIG. 8 (corresponding to FIGS. 1 and 2 of Patent Document 1). This toilet paper 101 uses a two-ply sheet in which a front sheet 101a and a back sheet 101b are laminated. The surface embossing of the front sheet 101a and the back embossing of the back sheet 101b are overlapped with each other. However, the embossing of the front sheet 101a is formed deeply, and the embossing of the back sheet 101b is formed shallowly, and the gap between them forms an air layer 102. This air layer 102 is described as being necessary to enhance water absorption.

[0004] The above air layer 102 is specified to have a thickness of 40 μm or more and 190 μm or less. In order to enable the formation of the air layer 102, the depth A of the surface embossing and the depth B of the back embossing have a relationship of "depth A > depth B", the depth A is 130 μm or more and 400 μm or less, and the depth B is 60 μm or more and 240 μm or less. Since the depth B of the back embossing is about 1 / 2 of the depth A of the surface embossing in this way, even when the back sheet 101b is overlapped with the front sheet 101a, the back sheet 101b is easily peeled off from the front sheet 101a.

[0005] Patent Document 1 also discloses an embossing device for manufacturing toilet paper having an air layer 102. This embossing device is as shown in FIG. 9 (corresponding to FIG. 8 of Patent Document 1), and includes a pair of upper embossing roll 103 and rubber roll 104, and a pair of lower embossing roll 103 and rubber roll 104, and is configured to separately form a surface emboss and a back emboss. Further, it includes a roll 105 for overlapping the front and back embosses, and is configured to support and overlap the surface sheet 101a and the back sheet 101b from below.

[0006] In paragraph 0044 of Patent Document 1, there is a description of "laminating so that the convex portions of one sheet and the concave portions of the other sheet overlap in the thickness direction", but there is no further explanation. Therefore, when reading the technical meaning from the drawing (FIG. 8 of Patent Document 1), since it does not have means (for example, a roll facing the roll 105) for applying a pressing force to the two sheets in cooperation with the roll 105, in this prior art, although the surface emboss and the back emboss can be overlapped with each other, it is understood that they cannot be firmly fitted together. However, for this reason, it also becomes the reason for forming the aforementioned air layer 102 between the emboss of the surface sheet 101a and the emboss of the back sheet 101b.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] In view of the above circumstances, an object of the present invention is to provide a toilet paper roll having a long roll length, a large water absorption amount, and being difficult to tear even when absorbing water during use.

Means for Solving the Problems

[0009] The toilet paper roll of the first invention is a toilet paper roll wound with toilet paper in which a plurality of sheets are laminated to form a single sheet of paper, and is composed of a surface-side sheet existing on the outermost surface of the single sheet of paper and a back-side sheet existing on the back surface of the surface-side sheet. Surface embossments are formed on the surface-side sheet. The ridges of the back-side sheet fit inside the ridges of the surface embossments on the surface-side sheet, and the valleys of the surface embossments on the surface-side sheet overlap with the valleys of the back-side sheet, and it is characterized in that there is no air layer between the surface-side sheet and the back-side sheet. The toilet paper roll of the second invention is characterized in that, in the first invention, the single sheet of paper is a two-ply sheet formed by laminating a surface-side sheet and a back-side sheet. The toilet paper roll of the third invention is characterized in that, in the second invention, the back-side sheet is a sheet in which fine embossments are formed on the back-side sheet itself. The toilet paper roll of the fourth invention is characterized in that, in the second invention, the back-side sheet is a sheet in which no embossments are formed on the back-side sheet itself. The toilet paper roll of the fifth invention is characterized in that, in the second invention, the surface-side sheet and the back-side sheet are adhesively bonded to each other in a scattered pattern with glue.

Advantages of the Invention

[0010] According to the first invention, the ridges of the back-side sheet fit inside the ridges of the surface embossments on the surface-side sheet, and the valleys of the surface embossments on the surface-side sheet overlap with the valleys of the back-side sheet, and there is no air layer between the surface-side sheet and the back-side sheet. Therefore, the thickness of the embossed portion does not increase, and a toilet paper roll with a long paper roll length while being housed in a predetermined winding diameter can be realized. In addition, the surface embossments and the back embossments are formed separately and are combined while maintaining their respective unevenness, so the softness of the paper is maintained. Therefore, it becomes toilet paper with a good touch. According to the second invention, in the two-ply toilet paper, a toilet paper roll can be realized in which the height of the embossed portion does not increase, and the roll length of the paper is long while being accommodated in a predetermined roll diameter. Further, the surface embossing and the back embossing are formed separately and are combined while maintaining their respective unevenness, so that the softness of the paper is maintained. Therefore, it becomes toilet paper with a good touch. Furthermore, the front and back sheets are less likely to peel off from each other, resulting in a good usability. According to the third invention, since the back sheet itself has fine embossing, it feels good to the touch, and since the basis weight of the back sheet is also large, the water absorption amount can be increased. According to the fourth invention, since the front sheet and the back sheet are in close contact with each other and have substantially the same basis weight, it becomes soft toilet paper that is difficult to tear. According to the fifth invention, in the case of a two-ply sheet that is glued, since the front and back sheets do not peel off from each other during use, the usability is improved.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying out the Invention

[0012] Next, embodiments of the present invention will be described based on the drawings. (Toilet paper roll R) (1) Overall structure of the toilet paper roll FIG. 1 shows a toilet paper roll R according to an embodiment of the present invention. There is no limit to the winding diameter D of the toilet paper roll R, but in one of the standard products, the winding diameter D is 120 mm. In the toilet paper roll R of the present invention, even if the winding diameter D is made to match the standard product, the bulk of the paper P becomes low for the reasons described later, so its length can be several times (for example, about 1.5 to 4 times) the paper length of 25 m of existing products. If the winding length is three times that of the existing product, the total length of the toilet paper roll R is 75 m. When the winding length becomes several times in this way, the transportation cost during truck transportation and the like can be reduced.

[0013] In the above toilet paper roll R, the paper P is a stack of a plurality of sheets. In the embodiment shown in FIG. 1, it is composed of a two-ply sheet in which the sheet S1 and the sheet S2 are laminated. And each of the sheets S1 and S2 is embossed. In the following embodiments, the sheet S1 is described as the front-side sheet S1 and the sheet S2 is described as the back-side sheet S2. Also, the emboss formed on the front-side sheet S1 is called the front emboss e1, and the emboss formed on the back-side sheet S2 is called the back emboss e2.

[0014] In Figure 1, a surface emboss e1 is formed on the surface-side sheet S1, and a back surface emboss e2 is formed on the back surface-side sheet S2. In this specification, embossing each of the plurality of sheets S1 and S2 is referred to as double embossing, and the resulting emboss is referred to as a double emboss. There is no limitation on the dimensions of the emboss pattern, and an emboss pattern of any size can be adopted. In the example shown in Figure 1, the width dimension ew of the emboss is 0.5 to 1.5 mm, and the depth ed is 0.1 to 0.5 mm, but it is not limited to these dimensions.

[0015] The surface emboss e1 and the back surface emboss e2 subjected to double embossing as described above maintain their respective unevenness. Moreover, since the ridges of the back surface-side sheet S2 enter the inside of the ridges of the surface-side sheet S1, and the valleys of the surface-side sheet S1 and the valleys of the back surface-side sheet S2 overlap, the paper has a shape in which the convex portions of the back surface emboss e2 fit into the concave portions of the surface emboss e1. As a result, there is no air layer in the embossed portions (surface emboss e1 and back surface emboss e2) of both the front and back sheets S1 and S2.

[0016] In the above paper P, the bulk of the embossed portion does not increase, and a toilet paper roll with a long roll length of the paper can be realized while being stored in a predetermined roll diameter. Further, since the surface emboss e1 and the back surface emboss e2 are embossed individually, the individual emboss shapes are maintained, and the paper P remains soft, so it becomes a toilet paper with a good touch. Furthermore, since the surface emboss e1 and the back surface emboss e2 fit together, the front and back sheets S1 and S2 are difficult to peel off from each other, and the usability is good.

[0017] (2) Combined shape of embossed portion The emboss pattern composed of the surface emboss e1 and the back surface emboss e2 described above has two forms in its combined shape. (2-1) First form As shown in Fig. 2(I), the toilet paper P is composed of a front - side sheet S1 and a back - side sheet S2. The convex part of the back - side emboss e2 of the back - side sheet S2 fits into the concave part of the front - side emboss e1 of the front - side sheet S1. In other words, the ridge part e21 of the back - side sheet S2 enters the inside of the ridge part e11 of the front - side sheet S1, and the valley part e12 of the front - side sheet S1 and the valley part e22 of the back - side sheet S2 overlap each other.

[0018] Moreover, the back - side sheet S2 has fine embosses formed on the back - side sheet S2 itself. In this specification, this fine emboss is referred to as the fine emboss e23. Examples of the fine emboss e23 include those with a depth of 0.05 - 0.3 mm and an average size of 0.1 - 0.5 mm, but it is not limited to these dimensions. With the provision of this fine emboss e23, the feel on the back of the paper P becomes even better. Moreover, since the basis weight (the weight of the paper per unit area, the same hereinafter) of the back - side sheet S2 is also large, there is an advantage that the water absorption capacity is also increased.

[0019] Since the back - side emboss e2 fits into the front - side emboss e1 as described above, the bulk of the paper P does not increase and becomes almost the same bulk as the front - side sheet S1. Therefore, even when the roll diameter D of the toilet - paper roll R is set to a predetermined diameter (for example, the standard 120 mm), the roll length of the toilet paper P can be increased. For this reason, compared with the conventional double - emboss - type toilet roll in which the ridge of the back - side emboss contacts the valley of the front - side emboss and the bulk is increased, it is possible to wind up several times the length. For example, it is possible to have a toilet paper with a roll length that is 1.5 - 4 times as long.

[0020] In the illustrated paper P, the front - side emboss e1 and the back - side emboss e2 are formed separately and are combined while maintaining their respective unevenness. Therefore, the front - side emboss e1 of the front - side sheet S1 can be supported by the back - side emboss e2 of the back - side sheet S2. Therefore, there is an advantage that it is easy to prevent the emboss from being deformed.

[0021] (2 - 2) The second form As shown in Fig. 2 (II), the toilet paper P is composed of a front - side sheet S1 and a back - side sheet S2, and has a shape in which the convex portions of the back - side emboss e2 of the back - side sheet S2 are fitted into the concave portions of the front - side emboss e1 of the front - side sheet S1. In other words, the ridge e21 of the back - side sheet S2 enters the inside of the ridge e11 of the front - side sheet S1, and the valley e12 of the front - side sheet S1 and the valley e22 of the back - side sheet S2 overlap each other.

[0022] In this second form, no fine emboss is formed on the back - side sheet S2, which is different from the first form only in this respect. Using the back - side sheet S2 without the fine emboss can suppress the paper thickness of the paper P. Therefore, even if the roll length of the paper P is increased, it is easy to store it in the same roll diameter, which has the advantage.

[0023] Also in the second form as described above, since the back - side emboss e2 fits into the front - side emboss e1, the bulk of the paper P does not increase and becomes almost the same bulk as that of the front - side sheet S1. Therefore, even if the roll diameter D of the toilet - paper roll R is made to be a predetermined diameter (for example, 120 mm is one of the standards), the roll length of the toilet paper P can be increased. This point is the same as that of the first form. Moreover, since the front - side emboss e1 and the back - side emboss e2 are formed separately and are combined while maintaining their respective unevenness, similar to the first form (2 - 1), the softness of the paper P is maintained, and it becomes a toilet paper with a good touch, and there is also an advantage that it is easy to prevent the emboss from being deformed.

[0024] (2 - 3) Emboss structure without an air layer In the emboss shapes shown in Figs. 2 (I) and (II), since the shapes and sizes of the front - side emboss e1 and the back - side emboss e2 are substantially the same and are fitted to each other, there is no air layer between the front - side emboss e1 and the back - side emboss e2. For this reason, the front - side sheet S1 and the back - side sheet S2 are paper sheets with almost the same basis weight. Thus, in the toilet paper P of the second embodiment, instead of having an air layer, the back sheet S2 is made of a paper sheet having substantially the same basis weight as the front sheet S1, thereby increasing the water absorption amount and realizing a toilet paper that is difficult to tear even when absorbing water during use.

[0025] (Manufacturing method) Hereinafter, the manufacturing method of the toilet paper roll R according to the present invention will be described. (1) Manufacturing apparatus used First, based on FIG. 3, the overall configuration of the toilet roll manufacturing equipment will be described. 1 is a base roll unwinding device, 3 is an embossing device according to the present invention, and 5 is a winder device, which are arranged in this order from the unwinding of the base roll to the winding of the toilet paper roll.

[0026] The base roll unwinding device 1 includes a first unwinding table 1a and a second unwinding table 1b that respectively rotate two base rolls r1 and r2 to unwind two sheets S1 and S2. The base rolls r1 and r2 are rolls of the base paper of toilet paper wound in a roll shape. The base rolls r1 and r2 are rotatably supported on an appropriate stand and are rotated by an appropriate rotation drive mechanism. The rotation drive mechanism includes a motor that rotates the roll shaft and a feed belt that generates rotation in contact with the roll surface. In the figure, the feed belt type first unwinding table 1a and second unwinding table 1b are shown.

[0027] The two sheets S1 and S2 fed out from the base roll unwinding device 1 are supplied to the embossing device 3, and each of the sheets S1 and S2 is individually embossed.

[0028] The winder device 5 includes a known mechanism including a winding roll section, a core supply mechanism, and a roll cutting section. In the winding roll section, a core is supplied, and toilet paper is wound around the core and thickened. When the toilet paper is wound to a predetermined diameter, a toilet paper log is obtained. When this log is cut to a predetermined length, a toilet paper roll is obtained.

[0029] The basic configuration of the embossing device 3 will be described with reference to FIG. 4. The embossing device 3 includes a first embossing unit 10, a second embossing unit 20, and an embossing combination unit. The first embossing unit 10 includes a first embossing roll 11 and a first rubber roll 12. Of the two sheets S1 and S2 discharged from the raw material roll unwinding device 1, the front surface side sheet S1 is wound around the first rubber roll 12 and the first embossing roll 11 in that order via a guide roll 6 located at the upper part of the machine frame.

[0030] The first embossing roll 11 is a metal roll, and an embossing pattern is formed on its surface. The first rubber roll 12 is an elastic rubber roll and is attached to a support arm 14 that is swingably supported. An air cylinder 13 is connected to the free end of the support arm 14, and by expanding and contracting this air cylinder 13, the pressing force of the first rubber roll 12 against the surface of the first embossing roll 11 can be adjusted. In addition, an appropriate stopper device is attached to the support arm 14 so that the amount of pressing of the first rubber roll 12 against the first embossing roll 11 can be accurately controlled.

[0031] By this first embossing unit 10, when the front surface side sheet S1 is pressed against the first embossing roll 11 by the first rubber roll 12 while passing between the first embossing roll 11 and the first rubber roll 12, embossing for forming a surface emboss e1 is performed on the front surface side sheet S1.

[0032] The second embossing unit 20 includes a second embossing roll 21 and a second rubber roll 22. Of the two sheets S1 and S2 discharged from the raw material roll unwinding device 1, the back surface side sheet S2 is wound around the second rubber roll 22 and the second embossing roll 21 in that order via guide rolls 7 and 8 located at the lower part of the machine frame, and embossing is performed.

[0033] The second embossing roll 21 is a metal roll with an embossing mold formed on its surface. The second rubber roll 22 is an elastic rubber roll and is attached to a support arm 24 that is swingably supported. An air cylinder 23 is connected to the free end of the support arm 24, and by expanding and contracting this air cylinder 23, it is possible to select an operating position where the pressing force of the second rubber roll 22 against the second embossing roll 21 can be exerted and a non-operating position where the pressing force is not exerted. Also, at the operating position, the pressing force can be adjusted. In addition, an appropriate stopper device is attached to the support arm 24 so that the pressing amount of the second rubber roll 22 against the second embossing roll 21 can be accurately controlled.

[0034] In the second embossing section 20, when the second rubber roll 22 is pressed against the backside sheet S2 wound around the second embossing roll 21, embossing for forming a backside emboss is performed on the backside sheet S2.

[0035] The backside emboss formed on the backside sheet S2 by the second embossing roll 21 is made to have the same size and shape as the surface emboss formed on the front side sheet by the first embossing roll 11. In this case, the backside sheet S2 embossed in the second embossing section 20 will be fed into an embossing combination section described later. In addition, in the second embossing section 20, it may be possible to form a fine emboss e23 of a finer size. In this case, a second embossing roll for forming the fine emboss may be used. Fig. 5 shows the second embossing roll 21 for forming the fine emboss.

[0036] The embossing device 3 is provided with an embossing combination section for fitting the backside emboss formed on the backside sheet S2 in the second embossing section 20 to the surface emboss formed on the front side sheet S1 in the first embossing section 10. This embossing combination part is mainly composed of the illustrated third rubber roll 31. This third rubber roll 31 is a rubber roll with elasticity and is attached to a support arm 34 that is swingably supported. And an air cylinder 33 is connected to an appropriate position of the support arm 34, and by expanding and contracting this air cylinder 33, the third rubber roll 31 is pressed against the first embossing roll 11, and the pressing force can be adjusted. This third rubber roll 31 functions to press the back surface side sheet S2 against the front surface side sheet S1 wound around the first embossing roll 11.

[0037] The embossing device 3 described above is used as embossing devices 3A, 3B, and 3C in the manufacturing methods of the first to third forms described later.

[0038] (Manufacturing method of the paper P in the first form) The manufacturing method of the paper P in the first form is a manufacturing method of the paper P having the embossing pattern shown in (I) of FIG. 2. The embossing device 3A shown in FIG. 5 is used in this manufacturing method. In the first embossing section 10, the front surface side sheet S1 guided by the guide roll 6 is wound so as to reach the first embossing roll 11 from the first rubber roll 12. Although the unevenness of the embossing pattern of the first embossing roll 11 is exaggeratedly drawn, typically, the depth ed shown in FIG. 1 is about 0.1 to 0.5 mm, and the size ew on the plane is about 0.5 to 1.5 mm. However, these numerical values can be arbitrarily selected, and there is no numerical limitation.

[0039] The pressing amount of the first rubber roll 12 against the first embossing roll 11 can be adjusted by the expansion and contraction of the aforementioned air cylinder. If the pressing amount of the first rubber roll 12 is increased, the size and depth of the unevenness of the surface embossing e1 formed on the front surface side sheet S1 will increase. If the pressing amount of the first rubber roll 12 is decreased, the size and depth of the unevenness of the surface embossing e1 will decrease. In this way, the size and depth of the embossing unevenness can be continuously changed.

[0040] In the second embossing section 20, the backside sheet S2 guided by the guide roll 7 is wound around from the second rubber roll 22 to the second embossing roll 21. The depth and size of the embossing pattern of the second embossing roll 21 are very minute compared to those of the first embossing roll 11, and a fine embossing e23 as referred to in this specification can be formed on the backside sheet S2.

[0041] The pressing amount of the second rubber roll 22 against the second embossing roll 21 can be adjusted by the expansion and contraction of the aforementioned air cylinder. Then, by increasing or decreasing the pressing amount of the second rubber roll 22, the size and depth of the unevenness of the fine embossing e23 can be increased or decreased. The fine embossing e23 can typically be formed to have a depth of about 0.05 to 0.3 mm and a size on the plane of about 0.1 to 0.5 mm as described above, but these numerical values are arbitrary and there is no numerical limitation in the present invention.

[0042] The formation of the back embossing e2 shown in Fig. 2(I) and the fitting of the back embossing e2 to the surface embossing e1 are performed using the third rubber roll 31. The surface sheet S1 on which the surface embossing e1 is formed by the first embossing roll 11 is fed between the third rubber roll 31 and wound around the third rubber roll 31. The backside sheet S2 on which the fine embossing e23 is formed by the second embossing roll 21 is fed between the third rubber roll 31 and the first embossing roll 11 and wound around the third rubber roll 31. In this state, when the third rubber roll 31 is pressed against the first embossing roll 11, the backside sheet S2 is pushed into the concave portion of the surface embossing e1 of the surface sheet S1.

[0043] As a result, as shown in Fig. 2(I), the back embossing e2 is formed on the backside sheet S2, and at the same time, the ridges of the backside sheet S2 fit inside the ridges of the surface sheet S1, and the valleys of the surface sheet S1 and the valleys of the backside sheet S2 overlap. Moreover, no air layer exists between the surface embossing e1 and the back embossing e2. Note that the backside sheet S2 has the fine embossing e23.

[0044] (Manufacturing method of the paper P of the second form) The manufacturing method of the paper P of the second form is a manufacturing method of the paper P having the embossing pattern shown in (II) of FIG. 2. The embossing device 3B shown in FIG. 6 is used for this manufacturing method. The mechanical configuration and usage of the first embossing roll 11 and the first rubber roll 12 that constitute the first embossing unit 10 are the same as those of the manufacturing method of the first form.

[0045] The mechanical configuration of the second embossing roll 21 and the second rubber roll 22 that constitute the second embossing unit 20 may be the same as that of the first form, but the second embossing roll 21 is used in a way that it is not substantially functional. That is, as shown in FIG. 6, the second rubber roll 22 is lowered downward and set as a non-operating position with a space between it and the second embossing roll 21. Then, the backside sheet S2 is only wound around the second embossing roll 21 without applying pressure, and the pressing action by the second rubber roll 22 is not performed.

[0046] The surface emboss e1 of the front side sheet S1 is formed by being pressed by the first rubber roll 12 while being wound around the first embossing roll 11. The backside sheet S2 is wound around the second embossing roll 21, but since it is not pressed by the second rubber roll 22, the fine emboss is not processed and is sent toward the third rubber roll 31. When the third rubber roll 31 is pressed against the first embossing roll 11, the backside sheet S2 is pushed into the concave portion of the surface emboss e1 of the front side sheet S1. As a result, a back emboss e2 is also formed on the backside sheet S2.

[0047] As a result, the obtained embossed structure is such that, as shown in FIG. 2(II), the mountain portion of the backside sheet S2 fits inside the mountain portion of the front side sheet S1, and the valley portion of the front side sheet S1 and the valley portion of the backside sheet S2 overlap. Moreover, no air layer exists between the surface emboss e1 and the back emboss e2.

[0048] (Manufacturing method of the paper P of the third form) The manufacturing method of the paper P of the third form is for manufacturing by adhering the front - side sheet S1 and the back - side sheet S2 with an adhesive. An embossing device 3C shown in FIG. 7 is used in this manufacturing method. The mechanical configuration and usage method of the first embossing part 10 and the second embossing part 20 are the same as those of the first form and the second form, except that an adhesive device 40 for pasting the front - side sheet S1 and the back - side sheet S2 is used. In FIG. 7, the illustration of the second embossing part is omitted.

[0049] The adhesive device 40 is mainly composed of an adhesive tank 41, an adhesive roll 42, and a transfer roll 43. In the adhesive tank 41, an adhesive g for pasting both the front and back sheets S1 and S2 is accommodated. The adhesive roll 42 has small recesses for holding a small amount of the adhesive g formed in a scattered pattern on the roll surface. A part of this adhesive roll 42 is inserted into the adhesive tank 41, in contact with the adhesive g, and when it rotates, the adhesive g held in the small recesses is transferred to the transfer roll 43. The excess adhesive g is scraped off by a scraping piece (not shown). When the adhesive roll 42 rotates, the held adhesive g is transferred to the transfer roll 43, and since the transfer roll 43 is in contact with the back surface of the front - side sheet S1 wound around the first embossing roll 11, when the transfer roll 43 rotates, the adhesive g is transferred to the back surface of the front - side sheet S1.

[0050] On the other hand, when the back - side sheet S2 is fed between the third rubber roll 31 and the first embossing roll 11 and the back - side sheet S2 is pressed against the front - side sheet S1 due to the pressing action of the third rubber roll 31, at this time, the convex portions of both the front and back sheets S1 and S2 are adhered to each other by the adhesive g. When the embossing device 3C is used, in the above - mentioned manner, the pasted two - ply paper P is obtained. This pasted paper P can be applied to the manufacturing methods of both the embossing pattern in FIG. 2(I) and the embossing pattern in FIG. 2(II). In the case of the glued two-ply paper P, since the front and back sheets S1 and S2 are held without peeling off during use, the usability is improved.

[0051] (Another embodiment of the toilet paper roll R) The present invention can be applied not only to two-ply toilet paper in which two sheets are laminated to form one paper, but also to three-ply toilet paper in which three sheets are laminated to form one paper, and can also be applied to four-ply toilet paper in which four sheets are laminated to form one paper.

[0052] To obtain three-ply toilet paper, among the master rolls r1 and r2 shown in the master roll unwinding device 1 shown in FIG. 3, a master paper pre-laminated with two plies may be used for either one of the rolls, and a single-ply master paper may be used for the other roll. Alternatively, three master rolls may be installed in the master roll unwinding device 1, and one sheet unwound from one master roll may be supplied to the first embossing section 10 of the embossing device 3, and two sheets unwound from the remaining two master rolls may be supplied to the second embossing section 20 in a stacked state.

[0053] To obtain four-ply toilet paper, master papers pre-laminated with two plies may be used for both of the master rolls r1 and r2 shown in the master roll unwinding device 1 shown in FIG. 3. Alternatively, four master rolls may be installed in the master roll unwinding device 1, and two sheets unwound from two master rolls may be stacked and supplied to the first embossing section 10 of the embossing device 3, and two sheets unwound from the remaining two master rolls may be stacked and supplied to the second embossing section 20.

[0054] In the case of the toilet paper roll of the present invention, it is possible to increase the winding length within a predetermined winding diameter of the toilet paper. For example, a winding length of 75 m or more can be realized, but it is also possible to set the winding length to around 25 m as in the conventional example. In this case, it can be realized by winding the toilet paper loosely when winding it with the winder device 5 shown in FIG. 3.

Description of Symbols

[0055] 3 Embossing Device 10 First Embossing Unit 11 First Embossing Roll 12 First Rubber Roll 20 Second Embossing Unit 21 Second Embossing Roll 22 Second Rubber Roll 31 Third Rubber Roll S1 Surface-side Sheet S2 Back-side Sheet P Paper (Toilet Paper)

Claims

1. A toilet paper roll wound with toilet paper formed by laminating a plurality of sheets into one sheet of paper, comprising a front surface side sheet existing on the outermost surface of the one sheet of paper and a back surface side sheet existing on the back surface of the front surface side sheet, wherein a front surface embossment is formed on the front surface side sheet, the ridges of the back surface side sheet fit inside the ridges of the front surface embossment on the front surface side sheet, the valleys of the front surface embossment on the front surface side sheet overlap with the valleys of the back surface side sheet, and there is no air layer between the front surface side sheet and the back surface side sheet A toilet paper roll characterized by the above.

2. The one sheet of paper is a two-ply sheet formed by laminating a front surface side sheet and a back surface side sheet A toilet paper roll according to Claim 1, characterized by the above.

3. The back surface side sheet is a sheet with fine embossments formed on the back surface side sheet itself A toilet paper roll according to Claim 2, characterized by the above.

4. The back surface side sheet is a sheet with no embossments formed on the back surface side sheet itself A toilet paper roll according to Claim 2, characterized by the above.

5. The front surface side sheet and the back surface side sheet are adhesively bonded to each other in a scattered pattern with glue A toilet paper roll according to Claim 2, characterized by the above.

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