Toilet paper roll

Abstract

[Problem] To provide a toilet roll having little difference in texture between front and back surfaces of drawn toilet paper. [Solution] The problem is solved by a toilet roll wherein two-ply toilet paper in which two sheets are laminated is wound, the toilet roll having a winding diameter of 104.5-130 mm and a winding length of 45-106 m. In this toilet roll: the sheets have unevenness due to embossing; a basis weight per sheet is 11-18 g / m2; a toilet paper thickness is 75-130 μm; and a ratio (S3 / S5) of a value (S3) of a TS750 on the lamination outer surface side of the sheet on the roll outer surface side to a value (S5) of a TS750 on the lamination outer surface side of the sheet on the roll inner surface side, as measured by the tissue softness analyzer TSA, is 0.8-1.2.

Description

Toilet roll

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

[0002] Some toilet paper wound into 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 rotatably in a toilet roll holder, and users pull out a predetermined length of toilet paper from the set toilet roll. At that time, the user manually rewinds or folds the pulled-out toilet paper in a zigzag pattern until it is stacked to an appropriate size and thickness that is easy to use.

[0004] When users rewind or fold the toilet paper, they may rewind it so that the side that was on the outer side of the roll becomes the side that touches their skin, or so that the side that was on the inner side of the roll becomes the side that touches their skin. In other words, the side of the toilet paper that touches their skin may differ depending on the user, or each time they use it.

[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 this has led to an increase in the length of toilet paper wound on a single roll. For example, while traditionally, products with one ply of toilet paper, also known as single, were around 50 m long, and products with two ply of toilet paper, also known as double, were around 25 m long, in recent years, products with roll lengths that are about 1.5 to 3 times longer have become commercially available.

[0006] Because the diameter of a toilet roll is limited to a certain extent in relation to the toilet roll holder, in order to make it longer, the basis weight and paper thickness of the toilet paper are reduced, or the tension during winding is increased during the manufacturing process. As a result, making it longer can easily cause a decrease in the cushioning properties of the toilet paper in the thickness direction, 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 outer surface of the toilet roll and the inner surface of the roll come into contact with the skin.

[0007] Adjusting the balance between the texture of toilet paper and the softness of the roll itself by lengthening the toilet roll has been done, 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.

[0008] JP 2017-64191 A JP 2022-72234 A

[0009] As mentioned above, the side of the toilet paper that touches the skin 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 the feel of the front and back of the toilet paper when it is pulled out.

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

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

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

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

[0014] A fourth means is the toilet roll according to the first means, which has recesses formed by embossing, and the embossed pattern of the recesses is such that the recesses are arranged linearly along a predetermined direction at predetermined intervals, and the angle between the predetermined direction and the paper flow direction is 0 to 45 degrees. Action and effect

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

[0016] Fig. 1 is a perspective view of a toilet roll according to an embodiment of the present invention; Fig. 2 is a side view of the toilet roll and toilet paper; Fig. 3 is a diagram for explaining an embossing pattern; Fig. 4 is a diagram for explaining another embossing pattern; Fig. 5 is a diagram for explaining another embossing pattern; Fig. 6 is a diagram for explaining another embossing pattern;

[0017] Next, the toilet roll of this embodiment will be described below with reference to the drawings, although 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 made 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 ruler manufactured by Muratec KDS Corporation or an equivalent device. The measurement 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 a conventional toilet roll, reducing purchase frequency, replacement frequency, and storage space. A roll length of at least twice that of a 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 have this width.

[0022] [Toilet Paper] The toilet paper 10 of this embodiment has sheets 11 and 12 that have embossed texture, and the basis weight of each sheet is 11 to 18 g / m ２The 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 with a toilet roll 1 having the above-mentioned roll diameter and roll length, if the basis weight and paper thickness are within these ranges, it can be adjusted to produce toilet paper 10 that has little or no wear 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 using 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 of Germany (Japan distributor: Nippon Luft Co., Ltd.) and its equivalents. TS750 in this embodiment is a value measured by this tissue softness measuring device TSA manufactured by Emtec. The feel of toilet paper 10 in use is affected by the properties of the toilet paper, such as its "smoothness / roughness," "softness," and "stiffness." This tissue softness measuring device TSA is able to digitize parameters that serve as indicators of these three properties (represented by TS750, TS7, and D, respectively) through acoustic and deformation measurements. Furthermore, this tissue softness measuring device TSA can calculate the HF (hand feel) value by performing an 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 correlated with the results of a human touch (panel test) and is used for a comprehensive quantitative evaluation of the touch of the toilet paper 10. Note that when measuring with the tissue softness measuring device TSA according to this embodiment, a sample processed into a circle with a diameter of approximately 112.8 mm using an Emtec sample punch is used, and the software used for analysis and digitization is the Emtec Measurement System.

[0025] [TS750] Here, TS750 is the intensity of the first maximum peak in the spectrum seen from the low frequency side, obtained when a bladed rotor is pressed from above against toilet paper 10 placed on a sample stage with a pressing pressure of 100 mN, then rotated at a rotation speed of 2.0 per second, and the vibration of the sample stage is measured with a vibration sensor, and is a parameter affected by "smoothness / roughness". The TS750 value (S3) of the laminated outer surface side 33 of the sheet 11 on the roll outer surface side 31 is the value measured when the sheet 11 on the roll outer surface side 31 of the two-ply toilet paper 10 that has been wound is placed on the sample stage, with the laminated outer surface side 33 facing upward. The TS750 value (S5) of the outer layer side 35 of the sheet 12 on the inner roll side 32 is a value measured by placing the two-ply toilet paper 10, particularly the sheet 12 on the inner roll side 32, in a single sheet on the sample stage with the outer layer side 35 facing upward. The relationship between the measurement surfaces of the outer roll side, inner roll side, outer layer side, and inner layer side also applies to the TS7 value and D value described below. The smaller the TS750 value, the better the "smoothness," but the specific measurement value is not necessarily limited for the toilet paper 10 of this embodiment. However, it is preferable that both the outer layer side 33 of the sheet 11 on the outer roll side 31 and the outer layer side 35 of the sheet 12 on the inner roll side 32 are 5 to 15 dBV. ２ rms, particularly 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 laminated outer surface sides of the sheets 11, 12 that make up the front and back surfaces, i.e., the front and back surfaces of the toilet paper 10, have equal smoothness, and users are likely to feel that there is no or little feeling of use on the front and back surfaces. Here, TS750 is affected by the stiffness (e.g., softness and hardness) of the individual fibers constituting the sheets 11 and 12, the coarseness and density of the fibers in the sample, the bond strength between the fibers, micro- and macro-compressibility, added chemicals (softener, starch, dry strength agent), etc. Therefore, to set the ratio (S3 / S5) to the above-mentioned 0.8 to 1.2, the sheet 11 constituting the outer surface side 31 of the roll and the sheet 12 constituting the inner surface side 32 of the roll are based on the same fiber raw materials, fiber basis weight, beating degree, added chemicals, preparation of felt-like wet paper during papermaking, Yankee dryer blade angle, crepe rate, calendar conditions, paper thickness, papermaking conditions, etc., and then, from this base, appropriate adjustments are made taking into account the difference in tension during winding between the inner surface side and the outer surface side during winding during manufacturing, the difference in the transport rolls that come into contact with each sheet along the transport path, etc.

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

[0028] [TS7] On the other hand, in the toilet roll 1 of this embodiment, 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 tissue softness measuring device TSA, is preferably 0.8 to 1.2.

[0029] The TS7 value measured by the tissue softness measuring device TSA is the intensity of the maximum peak in the spectrum containing a frequency of 6,500 Hz obtained when a sample placed on the sample stage of the tissue softness measuring device TSA is pressed from above with a bladed rotor of the measuring device at a pressure of 100 mN, then rotated at a rotation speed of 2.0 rpm, 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 using two-ply toilet paper 10, the surfaces of sheet 11 on the outer surface side 31 of the roll and sheet 12 on the inner surface side 32 of the roll that come into contact with the skin are the laminated outer surfaces 33 and 35. Therefore, if the ratio (T3 / T5) of the TS7 values ​​of the laminated outer surfaces 33, 35, which are the surfaces of the sheet 11 on the outer roll surface 31 and the sheet 12 on the inner roll surface 32 that come into contact with the skin, is 0.8 to 1.2, the outer surfaces of the sheets 11, 12 that make up the front and back surfaces, i.e., the front and back surfaces of the toilet paper 10, can be said to be equally soft, and the user is more likely to feel that the front and back surfaces are less or not as soft as the original. Here, TS7, like TS750, is affected by the stiffness (e.g., softness and hardness) of the individual fibers that make up the sheets 11, 12, the density of the fibers in the sample, the bond strength between the fibers, micro- and macro-compressibility, added chemicals (softener, starch, dry strength agent), etc. Therefore, to achieve a ratio (T3 / T5) of 0.8 to 1.2, similar to TS750, the fiber raw material, fiber basis weight, beating degree, additive chemicals, preparation of the felt-like wet paper during papermaking, Yankee dryer blade angle, crepe rate, calendar conditions, paper thickness, papermaking conditions, etc., are the same as those of the sheet 12 constituting the roll inner surface 32, and adjustments are made appropriately from this standard, taking into consideration the difference in tension during winding between the inner surface position and the outer surface position during winding during manufacturing, and the difference in the transport rolls that contact each sheet along 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 for the toilet roll 10 of this embodiment. However, preferably, both the stack outer surface side 33 of the sheet 11 on the roll outer surface 31 and the stack outer surface side 35 of the sheet 12 on the roll inner surface 32 are 5 to 20 dBV. ２ rms, particularly preferably 8 to 18 dBV２ It is rms.

[0030] [HF] On the other hand, the toilet roll 1 of this embodiment preferably 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 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 non-linear algorithm from the aforementioned 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 using two-ply toilet paper 10, the surfaces of sheet 11 on the outer roll side 31 and sheet 12 on the inner roll side 32 that come into contact with the skin are laminated outer surfaces 33, 35, so if the ratio (H3 / H5) of the HF value (H3) of laminated outer surface 33 of sheet 11 on the outer roll side 31 to the HF value (H5) of laminated outer surface 35 of sheet 12 on the inner roll side 32 is 0.8 to 1.2, it can be said that there is little or no difference in the feel felt by a person on the front and back surfaces of toilet paper 10. Here, as described above, the HF of toilet paper 10 and each sheet 11, 12 is determined by the parameters TS750 value, TS7 value, and D value, and therefore, to bring the HF value into the above range, adjustments can be made by adjusting these 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 is determined using 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 is determined using 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] [Embossing] On the other hand, in the toilet paper 10 of the toilet roll 1 of this embodiment, the sheets 11 and 12 have concave and convex portions formed by embossing as described above. The embossing form may be a single embossing form, in which concave and convex portions corresponding to the concave portions are formed on one side of the two-ply toilet paper 10, but is not necessarily limited thereto. Alternatively, a double embossing form may be formed in which concave and convex portions are separately formed on 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 shapes, areas, and arrangements of the concave portions of the sheets 11 and 12 are the same, and further, the sheets 11 and 12 are embossed to form concave and convex portions corresponding to the concave portions on one side, with the surfaces with the concave portions facing outward from the laminate. In this double embossed form, the toilet paper 10 has embossed recesses on the outer roll surface 31 and the inner roll surface 32, i.e., on both the front and back surfaces when in use, but no protrusions. This results in no difference in design between the front and back surfaces of the toilet paper 10, and an excellent feel to the touch. 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 recessed or protruding portions in the toilet paper 10 of this embodiment is not necessarily limited. The shape and area of ​​the recessed portions are also not necessarily limited. Furthermore, the area and shape of the non-recessed portions surrounded by the recessed portions are also not limited. The preferred embossing density is 5 to 50 embossments / cm. 2One preferred embossing pattern is one in which recesses 50 are regularly positioned at the intersections of a virtual diagonal grid, as shown in FIG. 3 . Particularly preferred is an embossing pattern in which the recesses 50 are shaped like a rectangle with the four corners extending outward from the diagonal line 50d, and other recesses 50 are located in the direction of the diagonal line 50d. The intersection angle ∠α of the diagonal line 50d of the recess 50 is 80 to 100 degrees, preferably 90 degrees. It is also desirable that the lengths of the diagonal lines 50d are substantially the same, and it is further desirable that the portion extending outward from the end of the diagonal line 50d gradually becomes shallower toward the tip. The spacing between the recesses 50 is not necessarily limited, but it is desirable that the planar shape of the non-recessed portions 51 between the recesses 50 be a circle or a rounded rectangle as shown. The embossed pattern of the arrangement of the recesses 50 has excellent designability and is easy to measure the parameters with the tissue softness measuring device TSA. Furthermore, when the preferred double embossed pattern in which only the recesses 50 are present on the front and back surfaces is used, the cushioning properties are excellent and are evaluated based on the sensory sensation during actual use.

[0035] On the other hand, another preferred embossing pattern of this embodiment, regardless of whether it is single embossing or double embossing, is an embossing pattern in which the recesses 50 are not arranged linearly along the paper flow direction MD, but are arranged linearly along a predetermined direction (the X direction in the figures) 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 lengthwise direction of the paper, also referred to as the MD direction, and is the direction of flow during papermaking. In the toilet roll 1, the direction in which the toilet paper 10 is unwound is the paper flow direction MD. This embossing pattern makes it difficult for fine wrinkles to form along the paper flow direction during the log winding process during production, improving the surface properties of the toilet paper 10 and sheets 11 and 12. This makes it easier to achieve the desired TS750, TS7, and D measured by the tissue softness measuring device TSA. Furthermore, in the case of this embossed pattern, it is desirable that the depressions have a shape that does not have any sides that are perpendicular to or parallel to the paper flow direction.

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

[0037] The type of pulp used as the main raw material for the sheets 11 and 12 is not particularly limited. A suitable blend of NBKP (softwood kraft pulp) and LBKP (hardwood kraft pulp) is preferred. Recycled paper pulp may also be included. Milk carton recycled paper is preferred as the recycled paper pulp. Furthermore, from the perspective of the texture of the resulting toilet paper 10, it is preferable for the sheets to be composed solely of virgin NBKP and LBKP. In this case, the blending ratio (JIS P 8120) of NBKP:LBKP is preferably 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 include polyacrylamide, CMC (carboxymethyl cellulose) or its salts such as sodium carboxymethyl cellulose, calcium carboxymethyl cellulose, and zinc carboxymethyl cellulose.

[0039] Next, test examples of the present invention will be described. Toilet rolls (test examples) according to the present invention were produced, and sensory evaluation tests were conducted on the "difference in smoothness between the front and back sides," "difference in softness between the front and back sides," and "difference in rigidity between the front and back sides." Twenty subjects touched two-ply toilet paper samples with their hands and evaluated the smoothness, softness, and rigidity of the front and back sides on a five-point scale, with 5 indicating whether there was a difference between the front and back sides, 4 indicating somewhat so, 3 indicating neither, 2 indicating not so, and 1 indicating not so. The physical properties and results for each example are shown in Table 1. The sensory evaluation values ​​in the table are rounded average values. Note that the embossing in Test Example 1 was performed in the form shown in FIG. 5, with an angle ∠β of 30 degrees relative to the machine direction, while Test Examples 2 to 4 were performed in the form shown in FIG. 5, with an angle ∠β of 0 degrees relative to the machine direction. Test Examples 5 to 7 had circular embossed recesses.

[0040] As shown in Table 1, Test Examples 1 to 7 according to the present invention were evaluated in the sensory evaluation as having small differences in "smoothness between the front and back," "softness between the front and back," and "rigidity between the front and back." Test Examples 1 to 4 were particularly highly evaluated.

[0041] 1...toilet roll, 10...toilet paper, 11...sheet on outer surface of roll, 12...sheet on inner surface of roll, 20...paper tube, 31...outer surface of roll, 32...inner surface of roll, 33...outer surface side of stack of sheets on outer surface of roll, 34...inner surface side of stack of sheets on outer surface of roll, 35...outer surface side of stack of sheets on inner surface of roll, 36...inner surface side of stack of sheets on inner surface 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 lines of recesses, ∠β...angle between direction in which recesses are arranged and direction of paper flow.

Claims

1. A toilet roll in which two sheets are laminated together to form a two-ply toilet paper roll, the roll diameter being 104.5-130 mm and the roll length being 45-106 m, the sheet having an embossed texture, and the basis weight of one sheet being 11-18 g / m ２ the toilet paper has a paper 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 side of the roll to the 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.

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

1.

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

2.

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

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