Toilet roll

Abstract

To provide a toilet roll having only a small difference in skin touch between surface and back face of a rolled-out toilet paper.SOLUTION: In a toilet roll in which two-plies toilet paper having two laminated sheets are wound, a winding diameter is 104.5-130 mm, a winding length is 45-106 m, a sheet has convex and concave by embossment processing, a basis weight for one sheet is 11-18 g / m2, a thickness of the toilet paper is 75-130 μm, a ratio (S3 / S5) between TS750 value (S3) on the laminate outer surface side of the sheet on the roll outer surface side and TS750 value (S5) on the laminate outer surface side of the sheet on the roll inner surface side as measured by the Tissue Softness Measurement device TSA is 0.8-1.2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a toilet roll in which toilet paper is wound into a roll. [Background technology]

[0002] Some toilet paper wrapped around toilet rolls is embossed to improve wiping performance and to impart bulk, flexibility, surface smoothness, etc. (Patent Document 1 below).

[0003] On the other hand, toilet rolls are generally set in a toilet roll holder so that they can rotate freely, and the user pulls out a specified length of toilet paper from the set toilet roll and then uses it. At that time, the user manually rewinds or zigzags the pulled out toilet paper until it is stacked to an appropriate size and thickness that is easy to use.

[0004] When a user rewinds or folds the toilet paper, the toilet roll may be rewound so that the side that was on the outer side of the roll becomes the side that touches the skin, or the side that was on the inner side of the roll becomes the side that touches the skin. In other words, the side of the toilet paper that touches the skin may differ depending on the user or each time it is used.

[0005] On the other hand, in recent years, there has been a demand for toilet rolls that can reduce the frequency of purchases, the number of replacements, and the storage space required, and the length of toilet paper wound on one roll is becoming longer. For example, traditionally, products with one ply of toilet paper, also called single, were around 50 m long, and products with two plies of toilet paper, also called double, were around 25 m long, but in recent years, products with roll lengths of about 1.5 to 3 times that length have become commercially available.

[0006] Since the diameter of a toilet roll is limited to a certain extent in relation to the toilet roll holder, in order to make the toilet roll longer, the basis weight and paper thickness of the toilet paper are reduced, and the tension during winding is increased during the manufacturing process. As a result, making the toilet paper longer is likely to result in a decrease in cushioning in the thickness direction of the toilet paper, crushing of unevenness due to embossing, and differences in elongation of the sheet on the front and back, which can easily lead to differences in the feel when the toilet roll touches the skin between the outer surface of the roll and the inner surface of the roll.

[0007] Adjusting the balance between the texture of toilet paper and the softness of the roll itself by lengthening the toilet roll has been attempted, for example, as shown in Patent Document 1 below, but reducing the difference in feel between the front and back of the unrolled toilet paper has not been sufficiently considered or achieved. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2017-64191 A [Patent Document 2] Patent Publication No. 2022-72234 Summary of the Invention [Problem to be solved by the invention]

[0009] As mentioned above, the side of the toilet paper that touches the skin when wound into a toilet roll may differ depending on the user or each time the toilet paper is used, so it is desirable that there is little or no difference in feel between the front and back of the toilet paper when it is pulled out.

[0010] Therefore, a main object of the present invention is to provide a toilet roll in which there is little or no difference in the feel of the front and back of the toilet paper when it is pulled out. [Means for solving the problem]

[0011] The means for solving the above problems are as follows. The first means is, A toilet roll in which two sheets of toilet paper are laminated together to form a two-ply toilet paper roll, The winding diameter is 104.5 to 130 mm, and the winding length is 45 to 106 m. The sheet has an embossed texture and has a basis weight of 11 to 18 g / m 2 The toilet paper has a thickness of 75 to 130 μm, and the ratio (S3 / S5) of the TS750 value (S3) of the laminated outer surface side of the sheet on the outer surface side of the roll to the TS750 value (S5) of the laminated outer surface side of the sheet on the inner surface side of the roll, measured by a tissue softness measuring device TSA, is 0.8 to 1.2; This is a toilet roll characterized by the above.

[0012] The second method is The toilet roll according to the first means has a ratio (D3 / D5) of the D value (D3) of the laminated outer surface side of the sheet on the outer surface side of the roll to the D value (D5) of the laminated outer surface side of the sheet on the inner surface side of the roll, measured by a tissue softness measuring device TSA, of 0.9 to 1.1.

[0013] The third method is the ratio B (H3 / H5) of the HF value (H3) of the laminated outer surface side of the sheet on the outer surface side of the roll to the HF value (H5) of the laminated outer surface side of the sheet on the inner surface side of the roll, measured by a tissue softness measuring device TSA, is 0.8 to 1.2; The toilet roll according to the first or second aspect.

[0014] The fourth measure is The toilet roll according to the first aspect has recesses formed by embossing, and the embossed pattern of the recesses is such that the recesses are linearly arranged at a predetermined interval along a predetermined direction, and the angle between the predetermined direction and the paper flow direction is 0 to 45 degrees.

[0015] According to the present invention, a toilet roll is provided in which there is little or no difference in the feel of the front and back of the pulled out toilet paper. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a perspective view of the toilet roll of the present embodiment. [Diagram 2] FIG. 2 is a side view of a toilet roll and toilet paper. [Diagram 3] FIG. 13 is a diagram for explaining an embossing pattern. [Figure 4] FIG. 11 is a diagram for explaining another embossing pattern. [Diagram 5] FIG. 13 is a diagram for explaining another embossing pattern. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Next, the toilet roll of this embodiment will be described below with reference to the drawings. However, the present invention is not limited to this embodiment.

[0018] [Toilet roll] As shown in Figures 1 and 2, the toilet roll 1 of this embodiment is a two-ply toilet paper 10, consisting of two sheets 11 and 12 laminated together, wound into a roll around a paper tube 20, also known as a tube core.

[0019] This toilet roll 1 has a roll diameter L1 (diameter) of 104.5 to 130 mm and a roll length of 45 to 106 m. A roll diameter L1 of 104.5 to 130 mm is a roll diameter that can be set in many toilet roll holders both in Japan and overseas. The roll diameter is a value measured using a diameter rule manufactured by Muratec KDS Co., Ltd. or an equivalent device. The measured value is the average value of measurements taken at three different locations in the width direction.

[0020] The roll length is the total length of the rolled toilet paper 10. Whereas the roll length of a conventional toilet roll made of two plies of toilet paper was around 25 m, this toilet roll 1 has a roll length of 45 to 106 m, which is about 1.5 to 3 times the roll length of the conventional toilet roll, and can reduce the purchase frequency, replacement frequency, and storage space. A roll length of at least about twice that of the conventional toilet roll is desirable for obtaining the effects of the present invention and is particularly preferred by users in terms of purchase frequency, replacement frequency, and storage space, and therefore a roll length of 50 m to 106 m is particularly desirable.

[0021] The outer diameter (paper tube diameter) L2 of the paper tube 20 around which the toilet paper 10 is wound is not necessarily limited, but can be a common outer diameter, specifically 33 to 45 mmφ. Furthermore, the width L3 of the toilet roll 1 is not limited. It is generally 100 to 120 mm, and the toilet roll 1 of this embodiment can also be this width.

[0022] [toilet paper] In the toilet paper 10 of this embodiment, the sheets 11 and 12 have projections and recesses due to embossing, and the basis weight of each sheet is 11 to 18 g / m 2 and the paper thickness of the two-ply toilet paper is 75 to 130 μm. The basis weight is a value measured based on the basis weight measurement method of JIS P 8124 (1998). The paper thickness is a value measured at 100 kPa ± 10 kPa based on ISO 534:2011, which corresponds to JIS P 8118 (2014). Even if the toilet roll 1 has the above-mentioned roll diameter and roll length, if the basis weight and paper thickness are within this range, it can be adjusted to a toilet paper 10 that has little or no feeling of use on both sides.

[0023] Here, the toilet roll 1 of this embodiment is characterized in that the ratio (S3 / S5) of the TS750 value (S3) of the laminated outer surface side 33 of the sheet 11 on the roll outer surface side 31 to the TS750 value (S5) of the laminated outer surface side 35 of the sheet 12 on the roll inner surface side 32, measured by a tissue softness measuring device TSA, is 0.8 to 1.2.

[0024] [Tissue Softness TSA Device] The tissue softness measuring device TSA according to this embodiment is a tissue softness measuring device TSA manufactured by Emtec Electronic GmbH (Japan distributor, Nippon Luft Co., Ltd.) of Germany, and its equivalents. The TS750 in this embodiment is a value measured by this tissue softness measuring device TSA manufactured by Emtec. The feeling of use of the toilet paper 10 is affected by the characteristics of the toilet paper, such as "smoothness / roughness," "softness," and "rigidity." This tissue softness measuring device TSA can digitize parameters that are indicative of these three characteristics (represented by TS750, TS7, and D, respectively) through acoustic measurement and deformation measurement. In addition, this tissue softness measuring device TSA can calculate the HF (hand feel) value by performing analysis using an algorithm based on these obtained parameters (raw data) and the basis weight, thickness, number of plies, etc. of the toilet paper 10. The HF value is a value used for a comprehensive quantitative evaluation of the feel of the toilet paper 10, correlated with the results of a human feel (panel test). Note that, when performing measurements using the tissue softness measuring device TSA according to this embodiment, a sample cut into a circle with a diameter of about 112.8 mm using a sample punch from Emtec Corporation is used, and the software used for analysis and quantification is the emtec measurement system.

[0025] [TS750] Here, TS750 is the intensity of the first maximum peak of the spectrum seen from the low frequency side obtained when the toilet paper 10 placed on the sample stage is pushed from above with a bladed rotor at a pressure of 100 mN, rotated at a rotation speed of 2.0 per second, and the vibration of the sample stage is measured with a vibration sensor. It is a parameter that is affected by "smoothness and roughness". The TS750 value (S3) of the laminated outer surface side 33 of the sheet 11 on the roll outer surface side 31 of the two-ply toilet paper 10 that was wound up is placed on the sample stage, with the laminated outer surface side 33 facing up. The TS750 value (S5) of the laminated outer surface side 35 of the sheet 12 on the roll inner surface side 32 of the two-ply toilet paper 10 that was wound up is placed on the sample stage, with the laminated outer surface side 35 facing up. The relationship between the measurement surfaces of the roll outer surface side, roll inner surface side, laminate outer surface side, and laminate inner surface side is also the same for the TS7 value and D value described later. The smaller the TS750 value, the better the "smoothness," but the specific measured value is not necessarily limited for the toilet paper 10 of this embodiment. However, it is preferable that the laminate outer surface side 33 of the sheet 11 on the roll outer surface side 31 and the laminate outer surface side 35 of the sheet 12 on the roll inner surface side 32 are both 5 to 15 dBV. 2 rms, preferably 8 to 12 dBV 2 It is rms.

[0026] As described above, in the toilet roll 1 of this embodiment, the ratio (S3 / S5) of the TS750 value (S3) of the laminated outer surface side 33 of the sheet 11 on the roll outer surface side 31 to the TS750 value (S5) of the laminated outer surface side 35 of the sheet 12 on the roll inner surface side 32 is 0.8 to 1.2. When using the two-ply toilet paper 10, the surfaces of the sheet 11 on the roll outer surface side 31 and the sheet 12 on the roll inner surface side 32 that come into contact with the skin are the laminated outer surfaces 33, 35. Therefore, if the ratio (S3 / S5) of the TSA750 values ​​of the laminated outer surfaces 33, 35 that are the surfaces of the sheet 11 on the roll outer surface side 31 and the sheet 12 on the roll inner surface side 32 that come into contact with the skin is 0.8 to 1.2, it can be said that the respective laminated outer surface sides of the sheets 11 and 12 that constitute the front and back surfaces, i.e., the front and back surfaces of the toilet paper 10, have the same smoothness, and the user is likely to feel that there is no or little usability on the front and back surfaces. Here, TS750 is affected by the stiffness such as the softness and hardness of each fiber constituting the sheets 11 and 12, the coarseness and density of the fibers in the sample, the bond strength between the fibers, the micro- and macro-compressibility, the added chemicals (softener, starch, dry strength agent), etc. Therefore, in order to make the ratio (S3 / S5) to be 0.8 to 1.2 as described above, the fiber raw material, fiber basis weight, beating degree, added chemicals, adjustment of the felt-like wet paper during papermaking, Yankee dryer blade angle, crepe rate, calendar conditions, paper thickness, papermaking conditions, etc. of the sheet 11 constituting the roll outer surface side 31 and the sheet 12 constituting the roll inner surface side 32 are the same as a standard, and from that standard, appropriate adjustments are made taking into consideration the tension difference during winding at the inner surface side position and the outer surface side position during winding during manufacturing, the difference in the transport rolls that contact each sheet in the transport path, etc.

[0027] [D] On the other hand, in the toilet roll 1 of this embodiment, the ratio (D3 / D5) of the value of D (D3) of the laminated outer surface side 33 of the sheet 11 on the roll outer surface side 31 to the value of D (D5) of the laminated outer surface side 35 of the sheet 12 on the roll inner surface side 32, measured by the above-mentioned tissue softness measuring device TSA, is preferably 0.9 to 1.1. The value of D measured by this tissue softness measuring device TSA is represented by the amount of deformation displacement in the vertical direction of the sample between the pressing pressures of 100 mN and 600 mN when a sample set on a sample stage of the tissue softness measuring device TSA is pressed from above with pressing pressures of 100 mN and 600 mN without rotating the bladed rotor of the measuring device, and is a parameter that is affected by rigidity. The ratio (D3 / D5) of the D value (D3) of the laminated outer surface side 33 of sheet 11 on the outer side 31 of the roll to the D value (D5) of the laminated outer surface side 35 of sheet 12 on the inner side 32 of the roll being 0.9 to 1.1 means that there is no or only a small difference in rigidity from the laminated outer surfaces 33, 35, which are the surfaces of sheet 11 on the outer side 31 of the roll and sheet 12 on the inner side 32 of the roll that come into contact with the skin, and there is no difference between the front and back in terms of conformability to the skin during use, resulting in an equal fit regardless of which side comes into contact with the skin, resulting in toilet paper 10 that feels less or has less feeling of use on the front and back. Here, in order to achieve a ratio (D3 / D5) of 0.9 to 1.1 between the D value (D3) of the laminated outer surface side 33 of the sheet 11 on the outer surface side 31 of the roll and the D value (D5) of the laminated outer surface side 35 of the sheet 12 on the inner surface side 32 of the roll, the fiber raw materials, fiber weight, degree of beating, added chemicals, adjustment of the felt-like wet paper during papermaking, Yankee dryer blade angle, crepe rate, calendar conditions, paper thickness, papermaking conditions, etc. of the sheet 11 on the outer surface side 31 of the roll and the sheet 12 on the inner surface side 32 of the roll are made the same as a standard, and adjustments are made appropriately from that standard taking into account the difference in tension when winding at the inner surface position and the outer surface position when winding the roll, the difference in the transport paths of each sheet 11, 12, etc.

[0028] [TS7] On the other hand, in the toilet roll 1 of this embodiment, it is desirable that the ratio (T3 / T5) of the TS7 value (T3) of the laminated outer surface side 33 of the sheet 11 on the roll outer surface side 31 to the TS7 value (T5) of the laminated outer surface side 35 of the sheet 12 on the roll inner surface side 32, measured by the above-mentioned tissue softness measuring device TSA, is 0.8 to 1.2.

[0029] The TS7 value measured by the tissue softness measuring device TSA is the intensity of the maximum peak of the spectrum including a frequency of 6500 Hz obtained when a sample placed on the sample stage of the tissue softness measuring device TSA is pushed from above with a bladed rotor of the measuring device at a pressure of 100 mN, rotated at a rotation speed of 2.0 revolutions per second, and the vibration of the sample stage is measured with a vibration sensor, and is a parameter that is mainly affected by "softness" in terms of fluffiness, surface softness, and bulk softness. As described above, when the two-ply toilet paper 10 is used, the surfaces of the sheet 11 on the outer side 31 of the roll and the sheet 12 on the inner side 32 of the roll that come into contact with the skin are the laminated outer surfaces 33, 35. Therefore, if the ratio (T3 / T5) of the TS7 values ​​of the laminated outer surfaces 33, 35, which are the surfaces that come into contact with the skin of the sheet 11 on the outer side 31 of the roll and the sheet 12 on the inner side 32 of the roll, is 0.8 to 1.2, it can be said that the outer surfaces of the sheets 11, 12 constituting the front and back surfaces, i.e., the front and back surfaces of the toilet paper 10, have the same softness, and the user is likely to feel that the front and back surfaces are less or less comfortable to use. Here, TS7, like TS750, is affected by the stiffness such as the softness and hardness of the individual fibers constituting the sheets 11, 12, the coarseness and density of the fibers in the sample, the bond strength between the fibers, micro- and macro-compressibility, added chemicals (softeners, starch, dry strength agents), etc. Therefore, in order to make the ratio (T3 / T5) 0.8 to 1.2, similarly to TS750, the fiber raw material, fiber basis weight, beating degree, additive chemicals, adjustment of felt-like wet paper during papermaking, Yankee dryer blade angle, crepe rate, calendar conditions, paper thickness, papermaking conditions, etc., of the sheet 12 constituting the roll inner surface side 32 are made the same as the standard, and adjustments are made appropriately from the standard, taking into consideration the tension difference during winding at the inner surface side position and the outer surface side position during winding during manufacturing, and the difference in the transport rolls that contact each sheet in the transport path. It is said that the smaller the TS7 value, the better the "softness", but the specific measured value is not necessarily limited in the toilet roll 10 of this embodiment. However, preferably, both the laminated outer surface side 33 of the sheet 11 on the roll outer surface side 31 and the laminated outer surface side 35 of the sheet 12 on the roll inner surface side 32 are 5 to 20 dBV. 2 rms, preferably 8 to 18 dBV2 It is rms.

[0030] [HF] On the other hand, the toilet roll 1 of this embodiment desirably has a ratio (H3 / H5) of the HF value (H3) of the laminated outer surface side 33 of the sheet 11 on the roll outer surface side 31 to the HF value (H5) of the laminated outer surface side 35 of the sheet 12 on the roll inner surface side 32, measured by the above-mentioned tissue softness measuring device TSA, of 0.8 to 1.2.

[0031] The HF (hand feel) value measured by the tissue softness measuring device TSA is calculated by a nonlinear algorithm from the above-mentioned TS7 value, TS750 value, D value, paper thickness, basis weight, number of plies, etc., and can be used for comprehensive quantitative evaluation of hand feel correlated with the results of human hand feel (panel test). The algorithm for the HF value according to the present invention and this embodiment is TPII. As described above, when the two-ply toilet paper 10 is used, the surfaces of the sheet 11 on the outer side 31 of the roll and the sheet 12 on the inner side 32 of the roll that come into contact with the skin are the laminated outer surfaces 33, 35, so if the ratio (H3 / H5) of the HF value (H3) of the laminated outer surface 33 of the sheet 11 on the outer side 31 of the roll to the HF value (H5) of the laminated outer surface 35 of the sheet 12 on the inner side 32 of the roll is 0.8 to 1.2, it can be said that there is no or a smaller difference in the feel felt by the human skin on the front and back surfaces of the toilet paper 10. Here, as described above, the HF of the toilet paper 10 and each sheet 11, 12 has parameters of the TS750 value, the TS7 value, and the D value, so that the HF value can be set within the above range by adjusting the parameters TS750, TS7, and D.

[0032] The HF value (H3) of the laminate outer surface side 33 of the sheet 11 on the roll outer surface side 31 has as parameters the TS750 value (S3), the TS7 value (T3), and the D value (D3) of the laminate outer surface side 33 of the sheet 11 on the roll outer surface side 31. The HF value (H5) of the laminate outer surface side 35 of the sheet 12 on the roll inner surface side 32 has as parameters the TS750 value (S5), the TS7 value (T5), and the D value (D5) of the laminate outer surface side 35 of the sheet 12 on the roll inner surface side 32.

[0033] [Emboss] On the other hand, in the toilet paper 10 of the toilet roll 1 of this embodiment, the sheets 11 and 12 have unevenness due to embossing as described above. The form of embossing by embossing can be a single embossing form in which a recess is formed on one side of the two-ply toilet paper 10 and a protrusion corresponding to the recess is formed on the other side, which is not necessarily limited. Also, a double embossing form can be formed in which unevenness is separately imparted to the sheets 11 and 12 by embossing, and then the sheets 11 and 12 are laminated together. A preferred embossing form is a two-ply double embossing form in which the shape, area, and arrangement of the recesses of each sheet 11 and 12 are the same, and further, the sheets 11 and 12 are laminated together such that the surface on which the recess is formed is the outer surface side of the laminate, with the recesses being the outer surface side of the laminate. In this double embossed form of toilet paper 10, embossed recesses are present on the roll outer surface 31 and the roll inner surface 32, i.e., on the front and back surfaces when in use, but no protrusions are present. As a result, there is no difference in design between the front and back surfaces of the toilet paper 10, and the feel is also excellent. The embossing is preferably performed using a steel rubber method. In addition, in the double embossed form, it is preferable that the sheets are not bonded together with an adhesive or the like.

[0034] On the other hand, the embossing pattern of the recesses or protrusions in the toilet paper 10 of this embodiment is not necessarily limited. The shape and area of ​​the recesses are not necessarily limited. Furthermore, the area and shape of the non-recessed areas surrounded by the recesses are not necessarily limited. The preferred embossing density is 5 to 50 embossments / cm. 2 As a preferred embodiment of the embossing pattern, as shown in FIG. 3, the recesses 50 are regularly positioned at the intersections of a virtual diagonal lattice. Particularly preferred is an embossing pattern in which the recesses 50 are in a quadrangular shape with the four corners extending outward from the diagonal 50d, and other recesses 50 are positioned in the direction of the diagonal 50d. The intersection angle ∠α of the diagonal 50d of the recess 50 is 80 to 100 degrees, preferably 90 degrees. In addition, it is preferable that the length of the diagonal 50d is substantially the same, and further, it is preferable that the portion extending outward from the end of the diagonal 50d is gradually shallower toward the tip. The interval between the recesses 50 is not necessarily limited, but it is preferable that the planar shape of the non-recessed portion 51 between the recesses 50 is a circle or a rounded rectangle as shown in the figure. The embossed pattern of the arrangement of the recesses 50 is excellent in design and is easy to measure the parameters by the tissue softness measuring device TSA. Furthermore, when the preferred double embossed form in which only the recesses 50 exist on the front and back surfaces is used, the cushioning properties are excellent and are evaluated in terms of the sensory properties when actually used.

[0035] On the other hand, another preferred embodiment of the embossing pattern of the present invention is an embossing pattern in which, regardless of whether it is single embossing or double embossing, the recesses 50 are not arranged linearly along the paper flow direction MD, but are arranged linearly along a predetermined direction (X direction in the figure) at a predetermined interval L4, and the angle ∠β between the predetermined direction X and the paper flow direction MD is 0 to 45 degrees, preferably 10 to 45 degrees, and particularly preferably 20 to 35 degrees, as shown in Figures 4 and 5. The paper flow direction is the length of the paper, also called the MD direction, and is the flow direction during papermaking. In the toilet roll 1, the direction in which the toilet paper 10 is pulled out is the paper flow direction MD. With this embossing pattern, fine wrinkles along the paper flow direction are less likely to occur during the log winding process during production, and the surface properties of the toilet paper 10 and the sheets 11 and 12 are improved. This makes it easier to achieve the desired TS750, TS7, and D measured by the tissue softness measuring device TSA described above. Furthermore, in the case of this embossing pattern, it is preferable that the recesses have a shape that has no sides perpendicular to or parallel to the paper flow direction.

[0036] Sheet On the other hand, the sheets 11 and 12 constituting the toilet paper 10 of this embodiment are crepe papers formed by wet-laid papermaking of fiber raw materials. In particular, dry-crepe is preferably formed. The crepe ratio is not particularly limited.

[0037] The type of pulp that is the main raw material of the sheets 11 and 12 is not particularly limited. A suitable ratio of NBKP (softwood kraft pulp) and LBKP (hardwood kraft pulp) is preferably used. Recycled paper pulp may also be used. The recycled paper pulp is preferably milk carton recycled paper. Furthermore, from the viewpoint of the texture of the resulting toilet paper 10, it is preferable that the sheets are composed only of virgin pulp NBKP and LBKP. In this case, the ratio (JIS P 8120) is preferably NBKP:LBKP=20:80 to 80:20, and particularly preferably NBKP:LBKP=30:70 to 60:40.

[0038] The content of the dry strength agent is not necessarily limited, but is preferably 0.001 to 0.15% by mass. This dry strength agent is preferably added internally. The type of dry strength agent is not necessarily limited, but examples thereof include polyacrylamide, CMC (carboxymethylcellulose) or its salts, such as sodium carboxymethylcellulose, calcium carboxymethylcellulose, and zinc carboxymethylcellulose. EXAMPLES

[0039] Next, a test example of the present invention will be described. A toilet roll (test example) according to the present invention was produced, and a sensory evaluation test was conducted on "difference in smoothness between the front and back", "difference in softness between the front and back", and "difference in stiffness between the front and back". In the test, 20 subjects touched the two-ply sample toilet paper with their hands and evaluated the smoothness, softness, and stiffness of the front and back on a 5-point scale, with 5: yes, 4: somewhat yes, 3: neither, 2: not so much, and 1: no. The physical properties and results of each example are as shown in Table 1. The sensory evaluation values ​​in the table are values ​​obtained by rounding off the average value. The embossing in Test Example 1 was in the form shown in FIG. 5, with an angle ∠β of 30 degrees relative to the flow direction, and Test Examples 2 to 4 were in the form shown in FIG. 5, with an angle ∠β of 0 degrees relative to the flow direction. Test Examples 5 to 7 had round embossed recesses.

[0040] [Table 1] As shown in Table 1, in the sensory evaluation, Test Examples 1 to 7 according to the present invention were evaluated as having small "difference in smoothness between the front and back," "difference in softness between the front and back," and "difference in rigidity between the front and back." Test Examples 1 to 4 in particular received high evaluations. [Explanation of symbols]

[0041] 1...toilet roll, 10...toilet paper, 11...sheet on outer side of roll, 12...sheet on inner side of roll, 20...paper tube, 31...outer side of roll, 32...inner side of roll, 33...outer side of stack of sheets on outer side of roll, 34...inner side of stack of sheets on outer side of roll, 35...outer side of stack of sheets on inner side of roll, 36...inner side of stack of sheets on inner side of roll, 50...recess, 50d...diagonal, 51...non-recess, L1...winding diameter, L2...outer diameter of paper tube, L3...width of toilet roll, L4...spacing of recesses, X...direction in which recesses are arranged, ∠α...intersecting angle of diagonal of recesses, ∠β...angle between direction in which recesses are arranged and flow direction of paper.

Claims

1. A toilet roll having two sheets of toilet paper laminated together, The winding diameter is 104.5 to 130 mm, and the winding length is 45 to 106 m, The sheet has a concave and convex shape due to embossing, and has a basis weight of 11 to 18 g / m ２ The toilet paper has a thickness of 75 to 130 μm, and a ratio (S3 / S5) of a TS750 value (S3) of the laminated outer surface side of the sheet on the outer side of the roll to a TS750 value (S5) of the laminated outer surface side of the sheet on the inner side of the roll, measured by a tissue softness measuring device TSA, is 0.8 to 1.2; A toilet roll characterized by:

2. The toilet roll according to claim 1, wherein the ratio (D3 / D5) of the D value (D5) of the laminated outer surface side of the sheet on the outer side of the roll to the D value (D3) of the laminated outer surface side of the sheet on the inner side of the roll, measured by a tissue softness measuring device TSA, is 0.9 to 1.

1.

3. a ratio B (H3 / H5) of the HF value (H3) of the laminated outer surface side of the sheet on the outer surface side of the roll to the HF value (H5) of the laminated outer surface side of the sheet on the inner surface side of the roll, measured by a tissue softness measuring device TSA, is 0.8 to 1.2; The toilet roll according to claim 1 or 2.

4. 2. The toilet roll according to claim 1, having recesses formed by embossing, the embossed pattern of the recesses being arranged linearly at predetermined intervals along a predetermined direction, and the angle between the predetermined direction and the paper flow direction is 0 to 45 degrees.

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