Toilet roll

Abstract

To provide a toilet roll that contains a temporary wet strength agent, making it appropriate for a toilet seat with a warm-water bidet, is less prone to tearing, offers great smoothness, aesthetic embossing patterns, and a satisfying volume sensation, features a suitable length and diameter in the roll, and provides excellent roll softness.SOLUTION: A toilet roll comprises 2-ply toilet paper wound into a roll shape. The roll's winding softness is 0.5 mm or more and 4.8 mm or less, and the winding diameter is 120 mm or more and 150 mm or less. The toilet paper contains a temporary wet strength agent. The basis weight of 1-ply is 16 g / m2 or more and 26 g / m2 or less, the average peel strength is 0.09 N / 76 mm or more and 0.32 N / 76 mm or less, and the TS750 ratio of the roll's front and back surfaces is 0.8 or more and 1.7 or less. The embossing is applied to the ply on the roll's front surface side, including a line-shaped first emboss.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a toilet roll having two plies of embossed toilet paper wound thereon. [Background technology]

[0002] Commercially available toilet rolls are becoming longer, but high-end products also require higher quality.

[0003] In particular, high-end products require a good feel, beautiful appearance, and resistance to tearing when used with a warm-water washing toilet seat. In addition, by increasing the roll diameter while maintaining the softness of the roll, a toilet roll with a more luxurious feel can be produced.

[0004] To make toilet paper that is less likely to tear when used with a warm-water washing toilet seat, a temporary moist paper strength agent is added during the papermaking process, making the toilet paper (sheet) less likely to tear when used with a warm-water washing toilet seat.

[0005] As a prior art document on toilet paper suitable for use with a warm water washing toilet seat, for example, Patent Document 1 describes a two-ply toilet paper having a thickness of 18 g / m 2 More than 23g / m 2 The toilet paper disclosed has a basis weight per ply of 100 g / cm or less, a specific volume of 5.0 to 6.5, and a wet tensile strength in the longitudinal direction of 90 gf / 25 mm to 130 gf / 25 mm for 4 plies, and is wound to a length of 30 m or more per roll. When the dry tensile strength in the longitudinal direction is expressed as DMDT and the dry tensile strength in the transverse direction is expressed as DCDT as specified in JIS P 8113, the DMDT / DCDT for 2 plies is 2.0 to 3.5.

[0006] Patent Document 2 also describes a toilet roll in which one ply of toilet paper having a plurality of projections and recesses on one side is wound into a roll, the toilet roll having a winding length of 105 to 210 m, a winding diameter of 100 to 140 mm, a roll mass not including the core per 114 mm of roll width of 225 to 485 g, a core mass per 114 mm of roll width of 3.2 to 6.0 g, an outer diameter of the core of 25 to 48 mm, and a winding density of the roll of 0.17 to 0.35 g / cm. 3 It is also described that the unevenness is embossed. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2015-126771 A [Patent Document 2] JP 2018-000728 A Summary of the Invention [Problem to be solved by the invention]

[0008] Incidentally, in order to improve the aesthetic value of embossing in toilet paper, it is necessary to provide a solid embossing (increase the embossing depth). However, if the embossing is deep, in the case of a single embossing, the difference in feel between the front and back of the paper becomes large.

[0009] On the other hand, double embossing tends to produce bulk, but the bulk may become too high in a pattern such as that shown in Figure 2 of Patent Document 2. In addition, because the embossing is in the form of dots, the corners around the embossed portion tend to be sharp, and even with double embossing, the difference in texture between the front and back may be large.

[0010] Of course, if the embossing is made thinner, the difference in feel between the front and back will be smaller, but the aesthetic appeal of the embossing will be compromised. If the plies are glued together in this state to enhance the aesthetic appeal of the embossing, the glue will make the paper stiffer. Also, sheets containing temporary wet strength agents feel stiffer and are even less tactile than regular toilet paper.

[0011] For the reasons mentioned above, it has been difficult to produce toilet paper and toilet rolls suitable for use in warm-water washing toilet seats that satisfy all of the requirements for tear resistance, smoothness, the aesthetic quality and volume of the embossing, appropriate winding length and diameter, and softness of the roll.

[0012] The present invention has been made in view of the above circumstances, and aims to provide a toilet roll which contains a temporary moist strength agent and is therefore suitable for use in warm water washing toilet seats, is resistant to tearing, has excellent smoothness, embossed decorative properties and volume, and has an appropriate winding length and diameter and is also good in roll softness. [Means for solving the problem]

[0013] The inventors have conducted extensive research and have found that, in a toilet roll obtained by laminating two plies of embossed sheets by bonding them with water and / or glue, the toilet roll has a roll-shaped winding softness and winding diameter that are each within a predetermined numerical range, the toilet paper contains a temporary wet strength agent, the embossing is applied to at least the ply on the roll surface side, and the toilet paper includes a linear first embossment, and further, the TS750 and ratio of the plies on the roll surface side and roll back side of the toilet paper, the basis weight of the toilet paper, and the area ratio of the portion on the embossing roll for embossing the sheet to be subjected to the first embossment are each within a predetermined numerical range, thereby making it possible to obtain a toilet roll that is suitable for use in a warm-water washing toilet seat, is difficult to tear, has excellent smoothness, the aesthetic appearance and volume of the embossment, has an appropriate winding length and winding diameter, and has a good roll softness, and has been completed. That is, the present invention provides the following.

[0014] (1) The first aspect of the present invention is a toilet roll in which an embossed sheet is laminated into two plies by bonding with water and / or glue, and the resulting toilet paper is wound into a roll, the roll having a winding softness of 0.5 mm to 4.8 mm and a winding diameter of 120 mm to 150 mm, the toilet paper contains a temporary wet strength agent, and the basis weight of one ply is 16 g / m 2 More than 26g / m 2 The tissue softness measuring device TSA was used to press a bladed rotor onto the toilet paper sample placed on the sample stage with a pressure of 100 mN, then rotate the sample stage at a rotation speed of 2.0 ( / sec), and the vibration of the sample stage was measured with a vibration sensor. In the intensity of the maximum peak (TS750) of the first spectrum from the low frequency side, which was automatically obtained by the software on the TSA, the TS750(a) on the roll surface side was 15 dBV. 2 rms over 50dBV 2 rms or less, TS750(b) on the back side of the roll is 15dBV 2 rms over 85dBV 2the ratio (TS750(b) / TS750(a)) is 0.8 or more and 1.7 or less, the embossing is provided at least to the ply on the roll surface side, and includes a linear first embossing, and an area ratio of the portion where the first embossing is provided in an embossing roll for applying the embossing to the sheet is 2% or more and 20% or less.

[0015] (2) A second aspect of the present invention is the toilet roll according to (1), characterized in that the depth of the first embossment in the ply on the roll surface side is 0.07 mm or more and 0.45 mm or less.

[0016] (3) A third aspect of the present invention is the toilet roll according to (1), characterized in that the embossment further includes a second embossment in the form of a dot, and the depth of the second embossment in the ply on the roll surface side is 0.05 mm or more and 0.24 mm or less.

[0017] (4) A fourth aspect of the present invention is the toilet roll according to (1), characterized in that the roll length is 33 m or more and 57 m or less.

[0018] (5) The fifth aspect of the present invention is the toilet roll according to (1), wherein the roll density of the roll is 0.10 g / cm 3 More than 0.20g / cm 3 It is characterized in that:

[0019] (6) A sixth aspect of the present invention is the toilet roll according to (1), characterized in that the result of the ease of unraveling test of the toilet paper specified in JIS P 4501 is 25 seconds or more and 100 seconds or less.

[0020] (7) A seventh aspect of the present invention is the toilet roll according to (1), characterized in that the content of the temporary wet strength agent is 0.005% or more and 0.2% or less.

[0021] (8) The eighth aspect of the present invention is the toilet roll according to (1), wherein the embossing is a double embossing that is applied to the ply on the front side of the roll and the ply on the back side of the roll before lamination, and the embossing is applied within 1 cm of the ply on the back side of the roll. 2 The number of winning pieces is characterized by being between 25 and 95.

[0022] (9) A ninth aspect of the present invention is the toilet roll according to (1), characterized in that the embossing is a double embossing that is imparted to the ply on the front side of the roll and the ply on the back side of the roll before lamination, and the depth of the embossing in the ply on the back side of the roll is 0.03 mm or more and 0.35 mm or less.

[0023] (10) The tenth aspect of the present invention is the toilet roll according to (1), wherein the winding density of the roll is 0.48 m / cm 2 More than 1.0m / cm 2 It is characterized in that:

[0024] (11) An eleventh aspect of the present invention is the toilet roll according to (1), characterized in that the average peel strength of the toilet paper is 0.09 N / 76 mm or more and 0.32 N / 76 mm or less.

[0025] (12) A twelfth aspect of the present invention is the toilet roll according to (1), characterized in that the maximum peel strength of the toilet paper is 0.20 N / 76 mm or more and 0.60 N / 76 mm or less.

[0026] (13) A thirteenth aspect of the present invention is the toilet roll according to (3), characterized in that the area ratio of the portion to which the second embossing is applied in the embossed roll is 1% or more and 17% or less.

[0027] (14) A fourteenth aspect of the present invention is the toilet roll according to (13), characterized in that the ratio (A1 / A2) of the area ratio (A2) of the part where the first embossing is performed to the area ratio (A1) of the part where the second embossing is performed in the embossing roll is 0.4 or more and 5.0 or less. Effect of the Invention

[0028] According to the present invention, it is possible to provide a toilet roll which is suitable for use in a warm water washing toilet seat because it contains a temporary moist paper strength agent, is resistant to tearing, has excellent smoothness, embossed decorative properties and volume, has an appropriate winding length and diameter, and is also good in roll softness. [Brief description of the drawings]

[0029] [Figure 1] FIG. 1 is a perspective view showing the appearance of a toilet roll according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing an example of an embossment applied to a toilet paper according to one embodiment of the present invention. [Diagram 3] FIG. 1 is a diagram showing a height profile on an XY plane taken by a microscope using shading. [Figure 4] FIG. 1 is a graph showing a height profile on an XY plane obtained by a microscope. [Diagram 5] FIG. 13 is a diagram showing how to determine the depth of embossing imparted to toilet paper. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, an embodiment for carrying out the present invention (hereinafter, simply referred to as "the present embodiment") will be described in detail. The present embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out by appropriately modifying it within the scope of its gist.

[0031] In the drawings, the same elements are given the same reference numerals, and duplicated explanations are omitted. Furthermore, unless otherwise specified, the positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to the ratios shown in the drawings.

[0032] <Toilet roll> Fig. 1 is a perspective view showing the appearance of a toilet roll 1 according to one embodiment of the present invention. The toilet roll 1 according to one embodiment of the present invention is a toilet roll 1 formed by laminating two plies of toilet paper 1x, which is made by bonding a sheet having embossing 10 with water and / or glue (hereinafter also referred to as ply bond glue), and winding the sheet into a roll. Note that the toilet paper 1x (hereinafter also referred to simply as sheet) is preferably perforated in the width direction at approximately equal intervals in the machine direction (not shown). Also, as shown in FIG. 1, the surface of the toilet paper 1x that faces the outside of the roll is referred to as the roll surface 1a (the surface of the toilet paper 1x), the surface that faces the center of the roll is referred to as the roll back surface 1b (the back surface of the toilet paper 1x), and the outermost end of the rolled up toilet paper 1x is referred to as the outermost roll edge 1e of the toilet paper 1x.

[0033] (Roll length and diameter) The roll length of the toilet roll 1 is preferably 33 m or more and 57 m or less. If the roll length is less than 33 m, the roll length is too short, and as a result, the roll diameter DR described below becomes too small. If the roll length exceeds 57 m, the roll diameter DR described below becomes too large. The roll length of the toilet roll 1 is more preferably 35 m or more and 52 m or less, and even more preferably 38 m or more and 46 m or less. The roll diameter DR of the toilet roll 1 is 120 mm or more and 150 mm or less. If the roll diameter DR is less than 120 mm, the roll diameter DR is too small, resulting in a roll length that is too short. If the roll diameter DR exceeds 150 mm, the roll diameter DR is too large. The roll diameter DR of the toilet roll 1 is preferably 123 mm or more and 145 mm or less, and more preferably 125 mm or more and 137 mm or less.

[0034] To determine the roll length, measure the length of 10 sheets of toilet paper 1x between the perforations of toilet roll 1. Then, measure the number of sheets of toilet paper 1x on toilet roll 1, and calculate the roll length proportionally from the length of 10 sheets and the number of sheets of toilet paper 1x. For example, if the length of 10 sheets is 1.80m and there are 200 sheets of toilet paper 1x, then the roll length is 1.80m x (200 / 10) = 36m. If toilet roll 1 does not have perforations, the roll length can be measured by actually measuring it. The roll diameter DR is measured using a diameter rule manufactured by Muratec KDS Co., Ltd. The roll length and roll diameter DR are measured by measuring four toilet rolls 1 and averaging the measurement results.

[0035] (Rolling softness) The winding softness of the toilet roll 1 is 0.5 mm or more and 4.8 mm or less. If the winding softness is less than 0.5 mm, the roll product will be less soft and will not feel luxurious. If the winding softness exceeds 4.8 mm, the roll product will be too soft and difficult to use. The winding softness of the toilet roll 1 is preferably 0.9 mm or more and 3.5 mm or less, and more preferably 1.3 mm or more and 2.8 mm or less.

[0036] The winding softness of the toilet roll 1 is measured using a compression tester (handy compression tester KES-G5 manufactured by Kato Tech Co., Ltd.) as follows. The direction parallel to the axis of the toilet roll 1 is the height direction, and the direction perpendicular to the tangent to the circumference of the toilet roll 1 is the radial direction. First, an acrylic pipe is inserted into the core of the toilet roll 1. The thickness of the acrylic pipe is 2 mm. The length of the acrylic pipe is 10 mm longer than the roll width of the toilet roll 1 (if the roll width of the toilet roll 1 is 114 mm, the length of the acrylic pipe is 124 mm). The outer diameter of the acrylic pipe is slightly smaller than the inner diameter of the core of the toilet roll 1, and is a size that prevents the toilet roll 1 from moving under its own weight when the toilet roll 1 is placed so that the axis of the toilet roll 1 is vertical after the acrylic pipe is inserted. If it is difficult to insert the acrylic pipe into the core and the outer diameter of the acrylic pipe is to be slightly smaller, the thickness may be slightly reduced using waterproof paper or the like. The mass of the acrylic pipe is about 31 g when the length is 125 mm and the outer diameter is 38 mm. By inserting the acrylic pipe into the core of the toilet roll 1, when the toilet roll 1 has a long roll length and a high winding density, the winding softness of the toilet roll 1 can be evaluated regardless of the hardness of the core.

[0037] Next, the toilet roll 1 is laid horizontally on a hard table so that the axis is horizontal. Then, the above-mentioned KES-G5 compression element (area 2.0 cm ) is placed at the center of the toilet roll 1 in the height direction. 2 ) is pressed from above in the radial direction at a speed of 10 mm / min. The pressure with which the compression element presses the roll is 0.5 gf / cm 2 The indentation depth at this time is T0, and the pressure is 100gf / cm 2 The indentation depth at T m As, (T m -T0) is the winding softness. The position when the compression element is pressed into the toilet roll 1 is the center in the height direction, excluding both ends in the height direction. The measurement is performed once for each of the four toilet rolls 1, and the values ​​are averaged.

[0038] (seat length and width) Furthermore, the length between the perforations (the sheet length of the toilet paper 1x) is preferably 80 mm to 250 mm, more preferably 88 mm to 160 mm, and even more preferably 95 mm to 120 mm. Furthermore, the sheet width of the toilet paper 1x is preferably 100 mm to 123 mm, more preferably 105 mm to 118 mm, and even more preferably 108 mm to 116 mm. By having the sheet length and sheet width each within the above numerical ranges, when using the toilet roll 1 as in the present application, the area used is appropriate, making it suitable for use in a warm water washing toilet seat.

[0039] (Roll weight) The roll mass of the toilet roll 1 is preferably 150 g or more and 270 g or less. If the roll mass is less than 150 g, the roll diameter DR will be too small and the roll length will be too short. If the roll mass exceeds 270 g, the roll diameter DR will be too large. The roll mass of the toilet roll 1 is more preferably 160 g or more and 240 g or less, and even more preferably 170 g or more and 210 g or less. The roll mass in the above numerical range is the mass of one roll per 114 mm of roll width not including the paper tube (core) of the toilet roll 1, and if the roll width is not 114 mm, it is converted to the mass per 114 mm by proportional calculation.

[0040] (Paper tube outer diameter) The cardboard tube outer diameter DI, which is the outer diameter of the core of the toilet roll 1 of the present invention, is preferably 25 mm or more and 48 mm or less. If the cardboard tube outer diameter DI is less than 25 mm, it will be difficult to use as a roll product. If the cardboard tube outer diameter DI exceeds 48 mm, the winding diameter DR will be too large as a result. The outer diameter DI of the paper tube is more preferably 35 mm or more and 46 mm or less, and further preferably 37 mm or more and 43 mm or less. The outer diameter DI of the paper tube is measured using a diameter rule manufactured by Muratec KDS Co., Ltd. The paper tubes of four toilet rolls 1 are measured, and the measurement results are averaged.

[0041] (Roll density) The roll density of toilet roll 1 is 0.10 g / cm 3 More than 0.20g / cm 3 It is preferable that the roll density is 0.10 g / cm or less. 3 If the roll density is less than 0.20 g / cm, the toilet roll 1 becomes too soft and difficult to use. 3 If the thickness exceeds this range, the toilet roll 1 will be less soft and will not feel as luxurious. The roll density of toilet roll 1 is 0.11 g / cm 3 More than 0.18g / cm 3 More preferably, it is 0.12 g / cm or less. 3 More than 0.15g / cm 3 It is even more preferable that:

[0042] The roll density is expressed as (roll mass) ÷ (roll volume). The roll mass is the mass of toilet roll 1 per 114 mm of roll width. The roll volume is expressed as [{cross-sectional area of ​​the roll's outer diameter (winding diameter DR) part} - (cross-sectional area of ​​the paper core outer diameter DI part)] x roll width (converted per 114 mm). For example, if the roll mass (excluding the paper core) per 114 mm of roll width is 162 g, the winding diameter DR is 127 mm, and the paper core outer diameter DI is 39 mm, the roll density = 0.124 g / cm 3 In addition, if the toilet roll 1 does not have a paper tube, the diameter of the center hole is the outer diameter DI of the paper tube.

[0043] (winding density) Furthermore, the winding density of the toilet roll 1 is 0.48 m / cm 2 More than 1.0m / cm 2 It is preferable that the winding density is 0.48 m / cm or less. 2 If the roll density is less than 1.0 m / cm, the toilet roll 1 becomes too soft and difficult to use. 2 If it exceeds this value, the softness of the roll product will be inferior and it will be difficult to feel a sense of luxury. The winding density of toilet roll 1 is 0.50 m / cm 2More than 0.90m / cm 2 It is preferable that the thickness is less than 0.60 m / cm 2 More than 0.80m / cm 2 It is more preferable that:

[0044] The winding density is expressed as (winding length x number of plies) ÷ (cross-sectional area of ​​the roll). The cross-sectional area of ​​the roll is expressed as {cross-sectional area of ​​the roll's outer diameter (winding diameter DR) - (cross-sectional area of ​​the cardboard core's outer diameter DI)}. For example, in the case of a winding length of 39 m, 2 plies, winding diameter DR of 127 mm, and cardboard core outer diameter DI of 39 mm, the winding density = (39 m x 2) ÷ {3.14 x (127 mm ÷ 2 ÷ 10) 2 -3.14×(39mm÷2÷10) 2}=0.68m / cm 2 It becomes.

[0045] <Toilet paper> The base paper used in the toilet paper 1x according to one embodiment of the present invention may be made of 100% wood pulp by mass, and may also contain recycled paper pulp, non-wood pulp, deinked pulp, recycled paper from liquid beverage cartons, etc. However, from the viewpoint of quality, the content of pulp other than wood pulp, recycled paper, etc. is preferably 50% by mass or less, more preferably 30% by mass or less, even more preferably 10% by mass or less, and most preferably 0% by mass. In order to obtain the target quality, the NBKP (softwood bleached kraft pulp) content is preferably 5% by mass to 55% by mass, more preferably 15% by mass to 45% by mass, and even more preferably 20% by mass to 35% by mass, and the LBKP (hardwood bleached kraft pulp) content is preferably 45% by mass to 95% by mass, more preferably 55% by mass to 85% by mass, and even more preferably 65% ​​by mass to 80% by mass.

[0046] Moreover, the toilet paper 1x according to one embodiment of the present invention contains a temporary moist paper strength agent to make it suitable for use in a warm water washing toilet seat. In this case, the content of the temporary moist paper strength agent is preferably 0.005% or more and 0.2% or less. If the content is less than 0.005%, the toilet paper 1x will be easily torn when used in a warm water washing toilet seat. If the content exceeds 0.2%, the toilet paper 1x will be inferior in softness. The content of the temporary wet strength agent is more preferably 0.01% to 0.1%, and even more preferably 0.02% to 0.07%. In this case, the content of the temporary wet strength agent refers to the mass percentage of the temporary wet strength agent (in terms of solid content (active ingredient)) relative to the pulp fiber (bone dry). In addition to temporary wet strength agents, additives to the paper stock that can be used include softeners, bulking agents, dyes, dispersants, dry strength agents, drainage improvers, pitch control agents, water absorption improvers, etc., depending on the required quality of the final product.

[0047] (Basic weight) The basis weight of one ply of the toilet paper 1x according to one embodiment of the present invention is 16 g / m 2 More than 26g / m 2 The basis weight of one piece of toilet paper is 16 g / m 2 If the basis weight of toilet paper 1x is less than 26g / m, the volume of toilet paper 1x will be inferior. 2 Above this, 1x toilet paper is less soft. The basis weight of one ply of toilet paper is 17 g / m 2 More than 24g / m 2 It is preferable that the thickness is less than 18 g / m 2 More than 22g / m 2 It is more preferable that the basis weight of the toilet paper 1x is measured in accordance with JIS P 8124.

[0048] (paper thickness) The paper thickness of the 10 plies of the toilet paper 1x according to one embodiment of the present invention is preferably 1.0 mm or more and 1.8 mm or less. If the paper thickness is less than 1.0 mm, the toilet paper 1x will have a poor sense of volume. If the paper thickness is more than 1.8 mm, the toilet paper 1x will have a poor softness. The paper thickness of the 10 plies of the toilet paper 1x is more preferably 1.1 mm or more and 1.6 mm or less, and even more preferably 1.2 mm or more and 1.5 mm or less. The paper thickness is measured using a thickness gauge (a dial thickness gauge called "PEACOCK" manufactured by Ozaki Manufacturing Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa and a gauge diameter of 30 mm. The sample is placed between the gauge and the measuring table, and the gauge is read when the gauge is lowered at a speed of 1 mm per second or less. Five sets of 2-ply toilet paper 1x are then stacked, and measurements are taken for 10 sheets, which is calculated as the thickness of the 10-ply paper. The measurement is also repeated 10 times (measure 10 different places, rather than measuring the same place 10 times), and the average of the measurement results is taken as the final paper thickness.

[0049] (specific volume) In addition, the specific volume of the toilet paper 1x according to one embodiment of the present invention is 5.0 cm 3 / g or more 9.5cm 3 / g or less. 3 If the specific volume is less than 9.5 cm3 / g, the volume of one roll of toilet paper is inferior. 3 If it exceeds 1 / g, toilet paper 1x will be less soft. The specific volume of one piece of toilet paper is 5.5 cm 3 / g or more 8.5cm 3 / g or less is more preferable, and 6.0 cm 3 / g or more 7.5cm 3 The specific volume is calculated by dividing the thickness of 1x toilet paper by the basis weight, and expressing the volume per unit g cm 3 It is expressed as:

[0050] (DMDT and DCDT) The tensile strength in the MD direction of the toilet paper 1x according to one embodiment of the present invention when dry based on JIS P 8113, DMDT (Dry Machine Direction Tensile Strength), is preferably 3.0 N / 25 mm or more and 5.5 N / 25 mm or less. The tensile strength in the CD direction when dry, DCDT (Dry Cross Direction Tensile Strength), is preferably 1.0 N / 25 mm or more and 2.0 N / 25 mm or less. If the DMDT is less than 3.0 N / 25 mm or the DCDT is less than 1.0 N / 25 mm, the toilet paper 1x is likely to break when used with a warm water washing toilet seat. If the DMDT exceeds 5.5 N / 25 mm or the DCDT exceeds 2.0 N / 25 mm, the toilet paper 1x is inferior in softness.

[0051] The DMDT is more preferably 3.5 N / 25 mm or more and 5.1 N / 25 mm or less, and even more preferably 3.7 N / 25 mm or more and 4.8 N / 25 mm or less, and the DCDT is more preferably 1.1 N / 25 mm or more and 1.8 N / 25 mm or less, and even more preferably 1.2 N / 25 mm or more and 1.6 N / 25 mm or less. In this case, the MD direction is the manufacturing direction (also called the machine direction or flow direction) of the toilet paper 1x during production. The CD direction is the direction perpendicular to the MD direction (also called the cross direction or width direction). The DMDT and DCDT of the toilet paper 1x are measured in 2-ply form in accordance with JIS P 8113.

[0052] (Easy to loosen) In addition, it is preferable that the result of the test for ease of unraveling of the toilet paper 1x according to one embodiment of the present invention, as specified in JIS P 4501, is 25 seconds or more and 100 seconds or less. If the test result is less than 25 seconds, the toilet paper 1x is likely to tear when used with a warm water washing toilet seat. If the test result is more than 100 seconds, the toilet paper 1x is inferior in softness. The result of the test for ease of unraveling of toilet paper 1x as specified in JIS P 4501 is more preferably 30 seconds or more and 80 seconds or less, and even more preferably 35 seconds or more and 60 seconds or less. The test for ease of unraveling is performed in accordance with JIS P 4501, but toilet paper 1x is peeled from a state in which it is laminated in two plies to a state in which it is in a one-ply state. The roll surface 1a side and the roll back surface 1b side of toilet paper 1x in one ply are each measured three times (total six times), and the six measured values ​​are averaged. The size of the sample is 114 mm in the width direction × 114 mm in the flow direction, but if the roll width is less than 114 mm, the flow direction can be made larger (longer) so that the area of ​​the sample is the same. The test piece is taken so as not to include the perforations, but if the interval between the perforations is narrow (small) and it is not possible to take the sample without including the perforations, the perforations may be included.

[0053] (peel strength) Furthermore, the average peel strength of the toilet paper 1x according to one embodiment of the present invention is preferably 0.09 N / 76 mm or more and 0.32 N / 76 mm or less. If the average peel strength is less than 0.09 N / 76 mm, the embossed pattern is thin (weak), so the toilet paper 1x is too smooth and less smooth. If the average peel strength is more than 0.32 N / 76 mm, the embossed pattern is thick (strong), so the toilet paper 1x is less smooth. The average peel strength of the toilet paper 1x is more preferably 0.12 N / 76 mm or more and 0.25 N / 76 mm or less, and even more preferably 0.15 N / 76 mm or more and 0.22 N / 76 mm or less.

[0054] In addition, the maximum peel strength of the toilet paper 1x according to one embodiment of the present invention is preferably 0.20N / 76mm or more and 0.60N / 76mm or less. If the maximum peel strength is less than 0.20N / 76mm, the embossed pattern is thin (weak), so the toilet paper 1x is too smooth and less smooth. If the average peel strength exceeds 0.60N / 76mm, the embossed pattern is thick (strong), so the toilet paper 1x is less smooth. The maximum peel strength of the toilet paper 1x is more preferably 0.27 N / 76 mm or more and 0.50 N / 76 mm or less, and even more preferably 0.33 N / 76 mm or more and 0.45 N / 76 mm or less.

[0055] In this case, the peel strength refers to the peel strength between the plies of one piece of toilet paper, and the measurement is performed in accordance with the tensile test method of JIS P 8113 using a tensile tester (STB-1225S, manufactured by A&D Co., Ltd.) under the standard conditions specified in JIS P 8111. First, a test piece measuring 76 mm in the width direction and 100 mm in the machine direction is taken from a sample of toilet paper 1x. Next, the ply is peeled off 20 mm in the machine direction. One side of the peeled ply is clamped and fixed by an upper gripper (width 80 mm) for 10 mm in the machine direction. The other ply is also clamped and fixed by a lower gripper (width 80 mm) for 10 mm in the machine direction. The pitch (spacing) of the grippers is 10 mm. Next, the sample is pulled (peeled off) at a tensile speed of 100 mm / min, and strength data is collected.

[0056] The strength data is obtained every 0.01 seconds, and after obtaining data from a distance of 40 mm to 80 mm (measurement length 40 mm) after the start of measurement, the average of the data is taken as the average peel strength (N / 76 mm). The maximum value of the data from the start of measurement to 80 mm is taken as the maximum peel strength (N / 76 mm). If the perforation is included in the distance from 40 mm to 80 mm after the start of measurement, the distance after the start of measurement can be shortened from 40 mm to a range that does not include the perforation, such as 70 mm (measurement length 30 mm).

[0057] (Embossed) The toilet paper 1x according to one embodiment of the present invention has an embossment 10, which is applied at least to the ply on the roll surface 1a side. The ply on the roll back surface 1b side does not need to have the embossment 10, but it is preferable that the embossment 10 is applied to both the ply on the roll surface 1a side and the ply on the roll back surface 1b side. The embossment 10 may be applied in either a single embossment or double embossment form, but it is preferable that the embossment 10 is applied to both the ply on the roll surface 1a side and the ply on the roll back surface 1b side before lamination. By doing so, it is easy to adjust the winding diameter DR, winding softness, and TSA (TS750) described later to be within a predetermined range. Moreover, the embossment 10 includes a linear first embossment 11 as shown in Fig. 2. The shape of the first embossment 11 is preferably a floral pattern as shown in Fig. 2, but the design or pattern other than the linear shape is not particularly limited as long as the area ratio, which will be described later, is within a predetermined numerical range and the design or pattern is aesthetically pleasing.

[0058] In the above embossment 10, the depth of the first embossment 11 in the ply on the roll surface 1a side is preferably 0.07 mm or more and 0.45 mm or less. If the depth of the first embossment 11 is less than 0.07 mm, the embossment is less aesthetically pleasing, and the toilet paper 1x is too smooth, resulting in less smoothness. If the depth of the first embossment 11 exceeds 0.45 mm, the toilet paper 1x is less smooth. The depth of the first embossments 11 in the ply on the roll surface 1a side is more preferably 0.15 mm or more and 0.40 mm or less, and further preferably 0.23 mm or more and 0.37 mm or less.

[0059] In addition to the first embossment 11, the embossment 10 shown in FIG. 2 preferably further includes a dot-shaped second embossment 12. The second embossment 12 improves the smoothness of the touch of the toilet paper 1x. The second embossment 12 is preferably provided in a portion where the first embossment 11 is not provided (around the first embossment 11), but it does not matter if there is an area around the first embossment 11 where the second embossment 12 is not provided. The definition of the line-shaped first embossment 11 refers to an embossed pattern having a length of 3 mm or more. In other words, the first embossment 11 includes an embossed pattern having a length of 3 mm or more. On the other hand, the second embossment 12 includes an embossed pattern having a length of less than 3 mm. In addition, the depth of the second embossment 12 in the ply on the roll surface 1a side is preferably 0.05 mm or more and 0.24 mm or less. If the depth of the second embossment 12 is less than 0.05 mm, the embossed cosmetic appearance is poor, and the toilet paper 1x is too smooth and less smooth. If the depth of the second embossment 12 exceeds 0.24 mm, the toilet paper 1x is less smooth. The depth of the second embossments 12 in the ply on the roll surface 1a side is more preferably 0.10 mm or more and 0.21 mm or less, and further preferably 0.13 mm or more and 0.19 mm or less.

[0060] Furthermore, the difference in depth between the first embossment 11 and the second embossment 12 in the ply on the roll surface 1a side is preferably 0.02 mm or more and 0.26 mm or less. If the difference in depth is less than 0.02 mm, the aesthetic appearance of the embossment is poor. If the difference in depth exceeds 0.26 mm, the toilet paper 1x is less smooth. In the ply on the roll surface 1a side, the difference in depth between the first embossments 11 and the second embossments 12 is more preferably 0.05 mm or more and 0.23 mm or less, and further preferably 0.10 mm or more and 0.20 mm or less.

[0061] When the embossment 10 is a double embossment, the thickness of the embossment 10 in the ply on the back surface 1b of the roll is 1 cm 2 The number of hits is preferably 25 or more and 95 or less. 2 If the number of hits is less than 25 or exceeds 95, the smoothness of the toilet paper 1x is poor or too smooth, and the smoothness is rather poor. 2 The number of winning pieces is more preferably 40 or more and 80 or less, and further preferably 50 or more and 70 or less. Similarly, when the embossment 10 is a double embossment, the depth of the embossment 10 in the ply on the roll back surface 1b side is preferably 0.03 mm or more and 0.35 mm or less. If the depth of the embossment 10 is less than 0.03 mm or more and exceeds 0.35 mm, the toilet paper 1x will be less smooth or too smooth, resulting in a poorer smoothness. The depth of the embossment 10 in the ply on the roll back surface 1b side is more preferably 0.07 mm or more and 0.28 mm or less, and even more preferably 0.10 mm or more and 0.20 mm or less.

[0062] The depths of the embossment 10, the first embossment 11, and the second embossment 12 are determined by measuring the height difference of the embossments using a microscope. As the microscope, a product name "One Shot 3D Measuring Macroscope VR-3100" manufactured by KEYENCE Corporation can be used. As the observation, measurement, and image analysis software for the microscope images, a product name "VR-H1A" can be used. The measurement conditions are a magnification of 12 times and a field of view area of ​​24 mm x 18 mm. The measurement magnification and field of view area may be appropriately changed depending on the size of the embossment 10.

[0063] FIG. 3 shows a height profile on the XY plane taken by a microscope, and the height of the surface of the toilet paper 1x is represented by shading. The linear areas in FIG. 3 that are shaded differently from the surroundings represent individual embossments 10. The depth of the embossment is determined by measuring the height difference of the embossment 10 using the above-mentioned microscope. The measurement is performed on the roll surface 1a side of the toilet paper 1x. In addition, when measuring, five turns of toilet paper 1x are removed from the toilet roll 1, and the sixth turn of toilet paper 1x is used to measure the sheet without changing the number of plies. In addition, if there are perforations, all of them are avoided for the measurement.

[0064] First, a line segment AB is drawn as shown in Figure 3 to obtain the height profile in Figure 4. The line segment AB should be drawn so as to cross the embossments. The line segment AB is drawn in the roll width direction (CD direction) of the toilet paper 1x, but if the distance between the embossments is narrow, for example 2 mm or less, and the height of the convex parts described below becomes low, the line segment may be drawn diagonally or in the roll winding direction. The height profile is a (measured) cross-sectional curve S1 that represents the unevenness of the actual sample surface of toilet paper 1x, but it also contains noise (steep peaks caused by fiber clumps on the surface of toilet paper 1x, whisker-like fibers, and areas without fibers), and such noise peaks must be removed when calculating the height difference of the unevenness.

[0065] Therefore, the (measured) profile curve S1 in Figure 4 is smoothed using the filter size of the weighted average radio button of ±12 to obtain the profile curve S2 in Figure 5. Note that smoothing using the filter of the weighted average radio button can be obtained automatically by using the above-mentioned analysis software. Then, in the graph shown in Figure 5, the embossed depression (minimum value) D1 and the embossed depression (minimum value) D2 adjacent to D1 are found. Next, the protrusion (maximum value or maximum value) between D1 and D2 is designated as H1. Similarly, D3, D4, H2, and H3 are found. Next, subtract the value of D2 from the average value of the vertical axis for H1 and H2 to obtain the embossing depth. Similarly, subtract the value of D3 from the average value of the vertical axis for H2 and H3 to obtain the embossing depth. At this stage, two data points are obtained.

[0066] After that, the toilet roll 1 is rotated 90 degrees in the roll winding direction of the toilet paper 1x three times, and the same measurement as above is taken at each position (a total of four measurement positions in the roll winding direction), and the average value of the total of eight positions (2 x 4) is ultimately used as the embossing depth. The above measurements are carried out for the first embossment 11 and the second embossment 12 on the roll front surface 1a, and the embossment 10 on the roll back surface 1b.

[0067] (TSA measurements) In a toilet roll 1 according to an embodiment of the present invention, a tissue softness measuring device TSA was used to press a bladed rotor with a pressure of 100 mN against a sample of toilet paper 1x placed on a sample stage, and then rotate the sample stage at a rotation speed of 2.0 ( / sec). When the vibration of the sample stage was measured with a vibration sensor, the intensity of the maximum peak (TS750) of the first spectrum from the low frequency side, which was automatically obtained by the software on the TSA, was 15 dBV. 2 rms over 50dBV 2 rms or less. TS750(a) is 15dBV 2Below rms, the toilet paper 1x is too smooth and is less smooth. TS750(a) is 50dBV 2 Above rms, toilet paper 1x becomes less smooth. In addition, TS750(a) is 20dBV 2 rms over 45dBV 2 rms or less, preferably 25 dBV 2 rms over 38dBV 2 It is more preferable that it is equal to or less than rms.

[0068] In addition, for the same TS750, the TS750(b) on the back side of the roll 1b was 15 dBV. 2 rms over 85dBV 2 rms or less. TS750(b) is 15dBV 2 Below rms, the toilet paper 1x is too smooth and is less smooth. TS750(b) is 85dBV 2 Above rms, toilet paper 1x becomes less smooth. In addition, TS750(b) is 20dBV 2 rms over 65dBV 2 rms or less is preferable, 30 dBV 2 rms over 45dBV 2 It is more preferable that it is equal to or less than rms.

[0069] Furthermore, for the same TS750, the ratio of TS750(a) to TS750(b) (TS750(b) / TS750(a)) is 0.8 or more and 1.7 or less. If the ratio is less than 0.8 or exceeds 1.7, the difference in smoothness between the roll surface 1a and the roll back surface 1b of the toilet paper 1x becomes large, resulting in inferior overall smoothness. The ratio of TS750(a) to TS750(b) (TS750(b) / TS750(a)) is preferably 0.9 or more and 1.5 or less, and more preferably 1.0 or more and 1.1 or less.

[0070] The above TS750 values ​​are the numerical values ​​measured (measured as 2 plies) using a tissue softness measuring device TSA (manufactured by Emtec; Tissue Softness Analyzer) on the portion of the 2-ply toilet paper 1x that corresponds to the roll surface 1a or roll back surface 1b of the toilet roll 1. The lower the TS750 value, the better the smoothness, but if the TS750 value is too low, it may be too smooth and may actually be inferior in smoothness.

[0071] The method for measuring the TS750 value using the tissue softness measuring device TSA and the measuring device used are described in detail in, for example, JP 2013-236904 A. For various measuring methods using the tissue softness measuring device TSA, please refer to the above patent documents.

[0072] <Water and / or plybond glue> The plybond glue used in the manufacture of the toilet paper 1x and the toilet roll 1 can be any known one. Among them, the composition of the plybond glue is preferably cellulose-based (such as carboxymethyl cellulose). The active ingredient (non-volatile content) of the plybond glue is preferably 0.1% to 5%, more preferably 0.5% to 4%, and even more preferably 1% to 3%. By setting the composition and active ingredient of the plybond glue as described above, it is possible to obtain toilet paper 1x that is suitable for use in a warm water washing toilet seat, is difficult to tear, has smoothness, is beautifully embossed, and has a sense of volume, and the roll has an appropriate winding length and diameter, and is also soft. Alternatively, water may be used instead of the ply bond glue. The use of water can improve the feel of the toilet paper 1x. Note that the use of water may weaken the adhesion between the plies, but by using the linear first embossment 11 and setting the embossed area ratio within a certain range as in the toilet roll 1 of the present invention, the adhesion between the plies is improved. The ply bond glue may be mixed with water and used.

[0073] <Toilet roll manufacturing method> Regarding the manufacturing process of toilet paper 1x and toilet roll 1, for example, they can be manufactured in the following order: (1) papermaking and creping, (2) embossing and ply bonding with water and / or ply bond glue, and (3) roll winding process. In addition, in the (1) papermaking process, it is preferable to make the paper using a general dry crepe papermaking machine, without using a bulky papermaking machine such as a TAD.

[0074] In the (2) embossing process, the sheet can be passed through an embossing roll to emboss the front and back surfaces of the sheet. In this case, the area ratio of the portion on the embossing roll for embossing the sheet to which the first embossing 11 is applied is 2% or more and 20% or less. If the area ratio is less than 2%, the aesthetic appearance of the embossed surface is poor, and the toilet paper 1x is too smooth, resulting in poor smoothness. If the area ratio exceeds 20%, the toilet paper 1x is poor in smoothness, and the difference in smoothness between the front and back surfaces becomes large. In addition, the toilet paper 1x is poor in softness, and the aesthetic appearance of the embossed surface 10 is also poor. The area ratio is more preferably 3% or more and 15% or less, and further preferably 4% or more and 10% or less.

[0075] In addition, the area ratio of the portion of the embossing roll to which the second embossing 12 is applied is preferably 1% or more and 17% or less. If the area ratio is less than 1%, the toilet paper 1x will be less smooth, and the difference in smoothness between the front and back will be large. In addition, the toilet paper 1x will be less soft, and the aesthetic appearance of the embossment will be inferior. If the area ratio exceeds 17%, the aesthetic appearance of the embossment will be inferior, and the toilet paper 1x will be too smooth, resulting in less smoothness. The area ratio is more preferably 2% or more and 13% or less, and further preferably 3% or more and 9% or less.

[0076] Furthermore, it is preferable that the ratio (A1 / A2) of the area ratio (A2) of the area of ​​the portion of the embossing roll where the first embossing 11 is applied to the area ratio (A2) of the portion of the embossing roll where the second embossing 12 is applied is 0.4 or more and 5.0 or less. If the ratio is less than 0.4, the toilet paper 1x will be poor in aesthetic appearance as an embossment, and the toilet paper 1x will be too smooth and will be inferior in smoothness. If the ratio exceeds 5.0, the toilet paper 1x will be poor in smoothness, and the difference in smoothness between the front and back will be large. In addition, the toilet paper 1x will be poor in softness, and will be inferior in aesthetic appearance as an embossment. The ratio (A1 / A2) is more preferably 0.6 or more and 3.0 or less, and further preferably 0.8 or more and 1.5 or less. Each area ratio in the embossing roll is calculated by [(total area of ​​the first embossments 11 or the second embossments 12 on the surface of the embossing roll / total surface area of ​​the embossing roll)×100].

[0077] As described above, according to this embodiment, the toilet paper 1x contains a temporary moist strength agent, and therefore is suitable for use in warm water washing toilet seats, and is tear-resistant, has excellent smoothness, the aesthetic appearance of the embossing 10, and a sense of volume. In addition, the roll has an appropriate winding length and diameter, and the roll is also good in softness. EXAMPLES

[0078] The present invention will be described in more detail with reference to the following examples and comparative examples, but the present invention is not limited to the following examples in any way.

[0079] Under each of the conditions shown in Tables 1 to 3, two-ply toilet papers and toilet rolls of Examples 1 to 32 and Comparative Examples 1 to 10 were produced and evaluated as follows. Each evaluation was performed after maintaining the sample in equilibrium under the temperature and humidity conditions (23±1°C, 50±2% RH) specified in JIS P8111. Each parameter other than the following evaluation was performed according to the standards or measurement methods described above.

[0080] (Resistance to tears when using a warm water washing toilet seat) Thirty test subjects rated the toilet paper's resistance to tearing when used with a warm-water washing toilet seat. The test subjects rated the toilet paper as being resistant to tearing even when used with a warm-water washing toilet seat on a four-point scale based on the number of test subjects who rated it as being resistant to tearing. 4: More than 28 monitors rated it as tear-resistant even when used with a warm-water washing toilet seat. 3: The number of monitors who rated the product as tear-resistant even when used with a warm-water washing toilet seat is between 25 and 27. 2: The number of monitors who rated the product as tear-resistant even when used with a warm-water washing toilet seat was 21 to 24. 1: Fewer than 20 monitors rated the product as tear-resistant even when used with a warm-water washing toilet seat

[0081] (Volume length) The roll length of the toilet roll was evaluated. The roll length of the toilet roll of each example and each comparative example was evaluated on a four-level scale. 4: The length of the toilet roll is between 38m and 46m 3: The length of the toilet roll is between 35m and 38m, or between 46m and 52m 2: The length of the toilet roll is between 33m and 35m, or between 52m and 57m 1: The length of the toilet roll is less than 33m or more than 57m

[0082] (Roll diameter) The roll diameter of the toilet roll was evaluated. The roll diameter of the toilet roll of each Example and Comparative Example was evaluated on a four-level scale. 4: The diameter of the toilet roll is between 125mm and 137mm 3: The diameter of the toilet roll is 123 mm or more but less than 125 mm, or more than 137 mm but less than 145 mm 2: The diameter of the toilet roll is 120 mm or more but less than 123 mm, or more than 145 mm but less than 150 mm 1: The diameter of the toilet roll is less than 120 mm or more than 150 mm

[0083] (Tactile sensation (smoothness)) Thirty testers evaluated the feel (smoothness) of the toilet paper. The number of testers who rated the toilet paper as smooth was determined by the number of testers who thought the smoothness was good, and the testers rated the toilet paper on a four-point scale. 4: More than 28 testers rated the smoothness of the toilet paper as good. 3: The number of monitors who rated the smoothness of the toilet paper as good was 25 to 27. 2: The number of monitors who rated the smoothness of the toilet paper as good was 21 to 24. 1: Fewer than 20 testers rated the smoothness of the toilet paper as good

[0084] (Touch (difference in smoothness between front and back)) Thirty test subjects evaluated the feel of the toilet paper (difference in smoothness between the front and back). The test subjects rated the feel as good (with little difference in smoothness between the front and back) on a four-point scale. 4: More than 28 monitors rated the surface as good with little difference in smoothness between the front and back. 3: The number of monitors who rated the surface smoothness as good (there is little difference between the surface and the back) is 25 to 27. 2: The number of monitors who rated the surface smoothness as good (there is little difference between the surface and the back) is 21 to 24. 1: Fewer than 20 monitors rated the surface as good with little difference in smoothness between the front and back

[0085] (Roll softness) Thirty test subjects evaluated the softness of the toilet rolls. The number of test subjects who rated the rolls as soft was determined using a four-point scale. 4: More than 28 monitors rated the roll as being soft. 3: The number of monitors who rated the roll as being soft was 25 to 27. 2: The number of monitors who rated the roll softness as good was 21 to 24. 1: Fewer than 20 monitors rated the roll as being soft.

[0086] (Volume) Thirty test subjects rated the volume of the toilet paper. The number of test subjects who rated the toilet paper as having excellent volume was used to give it a four-point rating. 4: More than 28 monitors rated it as having excellent volume 3: The number of monitors who rated the volume as excellent is 25 to 27. 2: The number of monitors who rated the volume as excellent was 21 to 24. 1: Fewer than 20 monitors rated the volume as excellent

[0087] (Toilet paper softness) Thirty testers rated the softness of the toilet paper. The number of testers who rated the toilet paper as soft was used to rate it on a four-point scale. 4: More than 28 testers rated the toilet paper as soft. 3: The number of monitors who rated the toilet paper as soft was between 25 and 27. 2: The number of monitors who rated the toilet paper as soft was 21 to 24. 1: Fewer than 20 people rated the toilet paper as soft.

[0088] (Embossed cosmetic properties) Thirty test subjects evaluated the aesthetic value of the embossed toilet paper. The number of test subjects who rated the toilet paper as having excellent aesthetic value gave it a four-point rating. 4: More than 28 monitors rated it as having excellent cosmetic properties 3: The number of monitors who rated the product as excellent in cosmetic beauty was 25 to 27. 2: The number of monitors who rated the product as excellent in cosmetic beauty was 21 to 24. 1: Fewer than 20 monitors rated the product as having excellent cosmetic qualities

[0089] Tables 1 to 3 show the conditions and evaluation results for each of the examples and comparative examples. [Table 1]

[0090] [Table 2]

[0091] [Table 3]

[0092] From the above, it was at least confirmed that this Example can provide a toilet roll which is suitable for use in warm water washing toilet seats because it contains a temporary moist strength agent, is resistant to tearing, has excellent smoothness, embossed beauty and volume, has an appropriate winding length and diameter, and is also good in roll softness. [Explanation of symbols]

[0093] 1 toilet roll 1a Roll surface 1b Back side of roll 1e The edge of the outermost roll of toilet paper 1x toilet paper 10, 11, 12 Embossed

Claims

1. The toilet roll is a toilet paper roll made by laminating two plies of embossed sheets by bonding them with water and / or glue, and winding the toilet paper into a roll. The roll has a winding softness of 0.5 mm or more and 4.8 mm or less, and a winding diameter of 120 mm or more and 150 mm or less, The toilet paper contains a temporary wet strength agent and has a basis weight of 16 g / m ２ 26g / m or more ２ is as follows: Using a tissue softness measuring device (TSA), a bladed rotor was pressed from above against the toilet paper sample placed on a sample stage with a pressing pressure of 100 mN, and then the sample stage was rotated at a rotation speed of 2.0 ( / sec). When the vibration of the sample stage was measured with a vibration sensor, the intensity of the maximum peak (TS750) of the first spectrum from the low frequency side, which was automatically obtained by the software on the TSA, was 15 dBV. ２ rms or more 50dBV ２ rms or less, TS750(b) on the back side of the roll is 15dBV ２ rms or more 85dBV ２ rms or less, the ratio (TS750(b) / TS750(a)) is 0.8 or more and 1.7 or less, The embossment is provided at least on the ply on the roll surface side, and includes a line-shaped first embossment, A toilet roll, characterized in that an area ratio of a portion to be embossed with the first embossing in an embossing roll for embossing the sheet is 2% or more and 20% or less.

2. The toilet roll according to claim 1, wherein the depth of the first embossment in the ply on the roll surface side is 0.07 mm or more and 0.45 mm or less.

3. The embossing further includes a second embossing in the form of a dot, The toilet roll according to claim 1, wherein the depth of the second embossment in the ply on the roll surface side is 0.05 mm or more and 0.24 mm or less.

4. 2. The toilet roll according to claim 1, wherein the roll length is 33 m or more and 57 m or less.

5. The roll density of the roll is 0.10 g / cm ３ 0.20g / cm or more ３ 2. The toilet roll according to claim 1, characterized in that:

6. 2. The toilet roll according to claim 1, wherein the result of the unraveling test of the toilet paper specified in JIS P 4501 is 25 seconds or more and 100 seconds or less.

7. The toilet roll according to claim 1, wherein the content of the temporary wet strength agent is 0.005% or more and 0.2% or less.

8. The embossing is a double embossing that is applied to each of the plies on the front surface side of the roll and the back surface side of the roll before lamination, 1 cm of the embossment on the back side ply of the roll ２ The toilet roll according to claim 1, characterized in that the number of winning pieces is 25 or more and 95 or less.

9. The embossing is a double embossing that is applied to each of the plies on the front surface side of the roll and the back surface side of the roll before lamination, The toilet roll according to claim 1, wherein the depth of the embossments in the ply on the back side of the roll is 0.03 mm or more and 0.35 mm or less.

10. The winding density of the roll is 0.48 m / cm ２ 1.0m / cm or more ２ 2. The toilet roll according to claim 1, characterized in that:

11. 2. The toilet roll according to claim 1, wherein the average peel strength of the toilet paper is 0.09 N / 76 mm or more and 0.32 N / 76 mm or less.

12. The toilet roll according to claim 1, characterized in that the maximum peel strength of the toilet paper is 0.20 N / 76 mm or more and 0.60 N / 76 mm or less.

13. The toilet roll according to claim 3, wherein an area ratio of the portion to which the second embossing is applied in the embossing roll is 1% or more and 17% or less.

14. The toilet roll according to claim 13, characterized in that a ratio (A1 / A2) of an area ratio (A2) of a portion to be subjected to the first embossing to an area ratio (A1) of a portion to be subjected to the second embossing in the embossing roll is 0.4 or more and 5.0 or less.

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