Toilet paper and sheet package

Abstract

To provide sheet-type toilet paper that is hard to be torn, soft, and smooth.SOLUTION: There is provided toilet paper which is formed by laminating multiple sets of two-ply sheets, and in which the basis weight per ply of the sheet is 12 g / m2 or more and 20 g / m2 or less, the smoothness peak TS750 measured by a softness measurement device TSA is 25 or less, and the compression energy WC under a load of 50 gf / m2 when the five sets of sheets are stacked is 0.7 gf cm / m2 or more.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to toilet paper and a sheet wrapper.

Background Art

[0002] Conventional toilet paper is required to have appropriate softness, a certain degree of strength so as not to tear even when used, and ease of loosening (hydrolyzability) in water. A roll type in which a long, thin paper is wound around a core is widespread (see, for example, Patent Document 1). Also, roll type toilet paper is time-consuming to use because the thin paper cut out using both hands has to be overlapped or rolled up. From this point of view, a sheet type toilet paper in which a plurality of pre-cut thin papers are stacked is known (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, since the attenuation of the sheet is small during the production of sheet type toilet paper, the softness and smoothness like those of roll type toilet paper cannot be obtained. Also, when the sheet strength of sheet type toilet paper is weakened, softness and smoothness can be imparted, but on the other hand, the sheet is likely to tear and pieces of paper drop during use.

[0005] An object of the present invention is to provide a sheet type toilet paper that is hard to tear, soft, and smooth.

Means for Solving the Problems

[0006] A first aspect of the present invention is toilet paper formed by laminating a plurality of sets of two-ply sheets, wherein the basis weight per ply of the sheet is 12 g / m 2 or more and 20 g / m 2 or less, the smoothness peak TS750 measured by the softness measuring device TSA is 25 or less, and the compression energy WC under a load of 50 gf / cm 2 when five sets of the sheets are stacked is 0.7 gf·cm / cm 2 or more. Provided is toilet paper.

[0007] In the first aspect, by adjusting the basis weight per ply of the sheet, the smoothness peak TS750 measured by TSA, and the compression energy WC under a load of 50 gf / cm 2 when five sets of one set of sheets are stacked within respective predetermined ranges, even if the toilet paper is of the sheet type, a sheet-type toilet paper that is difficult to tear, soft, and smooth can be obtained.

[0008] A second aspect of the present invention provides the toilet paper according to the first aspect, wherein the softness peak TS7 measured by the softness measuring device TSA is 11.5 or less. In the second aspect, by adjusting the softness peak TS7 measured by TSA within a predetermined range, a softer sheet-type toilet paper can be obtained.

[0009] A third aspect of the present invention provides the toilet paper according to the first or second aspect, wherein the dry tensile strength in the CD direction of the sheet is 90 cN or more and 180 cN or less. In the third aspect, by adjusting the dry tensile strength in the CD direction of the sheet within a predetermined range, a sheet-type toilet paper that is more difficult to tear, softer, and smoother can be obtained.

[0010] The fourth aspect according to the present invention provides the toilet paper according to any one of the first to third aspects, wherein the elongation rate in the MD direction of the sheet is 13% or more. In the fourth aspect, by adjusting the elongation rate in the MD direction of the sheet within a predetermined range, a sheet-type toilet paper that is more difficult to tear, softer, and smoother can be obtained.

[0011] The fifth aspect according to the present invention provides the toilet paper according to any one of the first to fourth aspects, wherein a plurality of sets of the sheets are laminated in a pop-up manner. In the fifth aspect, since a plurality of sets of sheets are laminated in a pop-up manner, even if the toilet paper is of the sheet type, it can be hygienically used with one hand. Also, since it can be used one by one, the amount of wasteful use can be reduced.

[0012] The sixth aspect according to the present invention provides a sheet package, wherein the toilet paper according to any one of the first to fifth aspects is housed in a resin film packaging bag. In the sixth aspect, since the toilet paper formed by laminating a plurality of sets is housed in a resin film packaging bag, even if the toilet paper is of the sheet type, it is easy to store and transport. Also, the resin film packaging bag can waterproof the toilet paper.

Advantages of the Invention

[0013] According to one aspect of the present invention, it is possible to provide a sheet-type toilet paper that is difficult to tear, soft, and smooth.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Best Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For parts common to each figure, the same reference numerals may be given and the description may be omitted. Also, the scales of the respective members in each drawing may be different from the actual ones.

[0016] In this specification, the directions of the figures will be described using a three-dimensional orthogonal coordinate system of three axial directions (X direction, Y direction, Z direction). In each figure, the left-right direction (the longitudinal direction of the sheet laminate or the sheet package) is the X direction, the front-rear direction (the short-side direction of the sheet laminate or the sheet package) is the Y direction, and the up-down direction (the height direction of the sheet laminate or the sheet package) is the Z direction.

[0017] Also, in this specification, in each direction, a deviation to the extent that the actions and effects of the embodiment are not impaired is allowed. Also, orthogonal may include substantially orthogonal.

[0018] <Toilet Paper> FIG. 1 is a view showing an example of toilet paper according to an embodiment. The toilet paper according to this embodiment has a plurality of sets of 2-ply sheets laminated as one set.

[0019] In this specification, a 2-ply sheet refers to a stack of two sheets. Also, in this specification, as shown in FIG. 1, a laminate of a plurality of sets or a plurality of 2-ply sheets S may be referred to as a sheet laminate SL. Also, toilet paper composed of such a sheet laminate SL may be referred to as sheet-type toilet paper.

[0020] The material of the sheet S is not particularly limited, but is preferably tissue paper. As the pulp composition of the sheet S, a known composition can be used. The blending ratio of the pulp can be, for example, 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0021] The pulp composition of the sheet S is not particularly limited. For example, softwood pulps such as NBKP (needle leaf kraft pulp) and NUKP (needle leaf unbleached pulp), and hardwood pulps such as LBKP (hardwood kraft pulp) and LUKP (hardwood unbleached pulp) can be used in any ratio.

[0022] The ratio of hardwood pulp to softwood pulp is not limited, but is preferably 10:90 to 80:20, and more preferably a pulp composition in which the ratio of hardwood pulp to softwood pulp is higher. Further, recycled pulp may be used for the pulp contained in the sheet S.

[0023] The sheet S may contain a softening agent. Here, the softening agent contains a component that imparts flexibility to the sheet S constituting the toilet paper. Specifically, the softening agent has a function of expanding between pulp fibers, forms an air layer between the pulp fibers, and enters between the pulp fibers, thereby making the pulp fibers hydrophobic and softening the sheet S. Further, by attaching the softening agent to the pulp surface, the friction with the skin can be reduced and the sheet S can be given smoothness.

[0024] The crepe ratio of the sheet S is arbitrary, but is preferably 20.0% or more and 24.8% or less, more preferably 20.5% or more and 24.5% or less, and still more preferably 21.0 to 24.0%. The crepe ratio is a value calculated by ((the peripheral speed of the Yankee dryer) - (the peripheral speed of the winding reel)) / (the peripheral speed of the Yankee dryer) × 100 (%) in relation to the Yankee dryer and the winding reel used when manufacturing the sheet S of the toilet paper. By adjusting the crepe ratio to 20.0% or more and 24.8% or less, a fluffy feeling and smoothness can be imparted to the sheet S.

[0025] The basis weight of the sheet S is 12 g / m 2 or more and 20 g / m 2 or less per ply, preferably 13 g / m 2 or more and 17 g / m 2 or less, more preferably 14 g / m 216.5 g / m or less. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011). 2 Note that the basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0026] Also, the thickness of the sheet S is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be adopted. For example, the thickness of the sheet S is 210 μm or more and 300 μm or less per ply, preferably 220 μm or more and 290 μm or less, more preferably 230 μm or more and 280 μm or less.

[0027] The sheet S may be embossed. Such embossing includes those that press the sheet S by a pressure embossing method, those that pierce pins into the sheet S by a pin embossing method to form unevenness or holes on one surface of the sheet S, those that adhere the laminated sheet S by heating and melting a water-soluble adhesive (such as starch) by a heat embossing method, and the like. Among these, it is preferable to use the pressure embossing method.

[0028] The hydrolyzability (ease of loosening in water) of the sheet S is optional, but from the viewpoint of using the sheet S for toilet paper, the hydrolyzability of the sheet S is preferably 50 seconds (s) or less, more preferably 45 seconds (s) or less, and even more preferably 40 seconds (s) or less. Here, the hydrolyzability is determined by putting a rotor that rotates at a predetermined rotational speed into a container filled with water, putting a test piece of the sheet into this, measuring the time [seconds (s)] until the test piece loosens, and making a determination from the measured time.

[0029] The dimensions of the sheet laminate SL can be such that the length in the longitudinal direction (X direction) is 150 mm or more and 300 mm or less, the width in the short transverse direction (Y direction) is 80 mm or more and 150 mm or less, and the height in the height direction or lamination direction (Z direction) is 30 mm or more and 150 mm or less.

[0030] The manufacturing method of the sheet laminate SL is not particularly limited. As the manufacturing method of the sheet laminate SL, for example, it can be manufactured using a rotary interfolder device, a multi-stand interfolder device, or the like. Note that the multi-stand interfolder device is a device that manufactures a web by alternately stacking sheets S while folding them with one folding plate.

[0031] Note that, as shown in FIG. 3, from the viewpoint of using each set of sheets S, the sheet laminate SL is preferably one in which the folded sheets S are alternately laminated (so-called pop-up type sheet laminate). Further, the form of the sheet laminate is not limited to one that can be pulled out in a pop-up manner, and may be one in which a plurality of sheets (or a plurality of sets) are simply laminated, or one in which each sheet is laminated in a folded state.

[0032] The dry tensile strength of the sheet S in the MD direction is arbitrary, for example, 100 cN or more and 600 cN or less, preferably 200 cN or more and 500 cN or less, preferably 250 cN or more and 400 cN or less. Here, the MD direction indicates the fiber flow direction or the longitudinal direction (Y direction) during the manufacture of the toilet paper. The dry tensile strength in the MD direction indicates the strength when the toilet paper is pulled in the MD direction in a dry state.

[0033] The dry tensile strength of the sheet S in the CD direction is 90 cN or more and 180 cN or less, preferably 95 cN or more and 175 cN or less, preferably 100 cN or more and 170 cN or less. Here, the CD direction indicates the direction orthogonal to the fiber flow direction or the lateral direction (X direction) during the manufacture of the toilet paper. The dry tensile strength in the CD direction indicates the strength when the sheet S is pulled in the CD direction in a dry state.

[0034] The elongation rate of the sheet S in the MD direction is arbitrary, for example, 13% or more, preferably 13% or more and 25% or less, more preferably 13% or more and 22% or less. Here, the elongation rate in the MD direction is expressed as the percentage of the length by which the sheet S has elongated when the sheet S is pulled in the MD direction in a dry state until it breaks, with respect to the original length of the sheet S before being pulled.

[0035] The elongation rate of the sheet S in the CD direction is 1% or more and 8% or less, preferably 2% or more and 7% or less, more preferably 3% or more and 6% or less. Here, the elongation rate in the CD direction is expressed as the percentage of the length by which the sheet S has elongated when the sheet S is pulled in the CD direction in a dry state until it breaks, with respect to the original length of the sheet S before being pulled.

[0036] For each set of sheets S constituting the sheet laminate SL, the smoothness peak TS750 measured by the softness measuring device TSA is 25 or less, preferably 24 or less, more preferably 23 or less. Note that the lower limit of the peak TS750 is not particularly limited, but is at most 5 or more when estimated.

[0037] Here, the softness measuring device TSA (hereinafter referred to as TSA) refers to the Tissue Softness Analyzer manufactured by Emtec Electronic. TSA is a device for measuring the properties of flat and soft materials.

[0038] Also, the smoothness peak TS750 (hereinafter referred to as TS750) indicates the smoothness parameter measured by TSA. In the present embodiment, the smaller the value of TS750, the smoother the sheet S tends to feel.

[0039] For each set of sheets S constituting the sheet laminate SL, the softness peak TS7 measured by TSA is preferably 11.5 or less, more preferably 11.3 or less, still more preferably 11.1 or less. Note that the lower limit of the peak TS7 is not particularly limited, but is at most 5 or more when estimated.

[0040] Here, the softness peak TS7 (hereinafter referred to as TS7) indicates the softness parameter measured by TSA. In this embodiment, the lower the value of TS7, the more likely the sheet S is felt to be soft.

[0041] The toilet paper of this embodiment has a compression energy WC under a load of 0.7 gf·cm / cm when five sets of a single sheet S are stacked, 2 when the load is 50 gf / cm. 2 or more, preferably 0.8 gf·cm / cm 2 or more, more preferably 0.9 gf·cm / cm 2 or more.

[0042] Here, the compression energy under a load of 50 gf / cm when five sets of a single sheet S are stacked 2 is the amount of compression work when a terminal (contact area: 2.0 cm 2 ) is brought into contact with the sheet S in the stacking direction or the thickness direction (Z direction) of the sheet S in a state where five sets of a single sheet S are stacked, using a compression tester (manufactured by Kato Tech Co., Ltd., KES-G5), and a load of 50 gf / cm 2 is applied.

[0043] In the toilet paper of this embodiment, as described above, the basis weight per ply of the sheet S, the smoothness peak TS750 measured by TSA, and the compression energy WC under a load of 50 gf / cm of the laminate formed by laminating five sheets are each adjusted within a predetermined range, so that even if the toilet paper is of the sheet type, a sheet-type toilet paper that is difficult to tear, soft, and smooth can be obtained. 2

[0044] In the toilet paper of this embodiment, as described above, since the softness peak TS7 measured by TSA is adjusted within a predetermined range, a softer sheet-type toilet paper can be obtained.

[0045] In the toilet paper of the present embodiment, as described above, since the dry tensile strength of the sheet S in the CD direction is adjusted within a predetermined range, a sheet-type toilet paper that is more resistant to tearing, softer, and smoother can be obtained.

[0046] In the toilet paper of the present embodiment, as described above, since the elongation rate of the sheet S in the MD direction is adjusted within a predetermined range, a sheet-type toilet paper that is even more resistant to tearing, even softer, and even smoother can be obtained.

[0047] In the toilet paper of the present embodiment, as described above, since a plurality of sets of the sheet S are laminated in a pop-up manner, even though the toilet paper is of the sheet type, it can be hygienically used with one hand. Also, since it can be used one by one, the amount of wasteful use can be reduced.

[0048] <Sheet package> FIG. 2 is a diagram showing an example of a sheet package according to the embodiment. FIG. 3 is a diagram showing the usage state of the toilet paper according to the embodiment. The sheet package 100 according to the present embodiment is formed by housing the above-described toilet paper of the present embodiment in a resin film-made packaging bag 10. That is, the sheet package according to the present embodiment is one in which the above-described sheet laminate SL is housed in the packaging bag 10.

[0049] The packaging bag 10 has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, a side surface 15, and a side surface 16 in a state where the sheet laminate SL is housed. In the packaging bag 10, the top surface 11 and the bottom surface 12 face each other in the height direction (Z direction), the front surface 13 and the back surface 14 face each other in the short side direction (Y direction), and the side surface 15 and the side surface 16 face each other in the long side direction (X direction). The side surface 15 and the side surface 16 are continuous with any of the top surface 11, the bottom surface 12, the front surface 13, and the back surface 14.

[0050] The sheet laminate SL contained in the packaging bag 10 has the top surface LT, the bottom surface LB, the pair of long side surfaces LL, and the pair of short side surfaces LS of the sheet laminate SL facing the top surface 11, the bottom surface 12, the front surface 13, the back surface 14, the side surface 15, and the side surface 16 of the packaging bag 10, respectively.

[0051] An outlet 20 is provided on the top surface 11 of the packaging bag 10. The sheet S can be pulled out through the outlet 20. As shown in FIG. 3, the form of the outlet 20 is constituted by an opening OP. The opening OP constituting the outlet 20 may be formed by breaking a tear cut line such as a perforation. Here, the tear cut line is an intermittent cut line in which cuts and ties (the uncut portion between two cuts) are alternately arranged, and when the tie breaks, the adjacent cuts become continuous cuts.

[0052] The shape of the opening OP constituting the outlet 20 is not particularly limited, and in a plan view, it is a straight line, an elongated rectangle, an ellipse, a gourd shape, a dumbbell shape, or the like.

[0053] The length of the outlet 20 (opening OP) is not particularly limited, but is preferably 100 mm or more and 190 mm or less, more preferably 120 mm or more and 185 mm or less, and still more preferably 135 mm or more and 180 mm or less.

[0054] The ratio of the length of the outlet 20 (opening OP) to the length of the top surface 11 of the packaging bag 10 is not particularly limited, but is preferably 30% or more and 90% or less, more preferably 40% or more and 87% or less, and still more preferably 50% or more and 85% or less.

[0055] The width of the outlet 20 (opening OP) is not particularly limited, but is preferably 0.1 mm or more and 45 mm or less, more preferably 0.5 mm or more and 42 mm or less, and still more preferably 1 mm or more and 40 mm or less.

[0056] The ratio of the width of the outlet 20 (opening OP) to the width of the top surface 11 of the packaging bag 10 (width in the short side direction (Y direction)) is not particularly limited, but is preferably 0.05% or more and 38% or less, more preferably 0.1% or more and 35% or less, and even more preferably 0.5% or more and 33% or less.

[0057] The packaging bag 10 is made of a resin film. The resin film constituting the packaging bag 10 is flexible. The resin used for the resin film is not particularly limited, and for example, resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), and polyamide (PA) can be used. As the polyethylene, high-density polyethylene, low-density polyethylene, etc. can be used.

[0058] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferable in terms of being flexible, having excellent handleability, high sealability when heat-sealed, and being inexpensive. Also, polyethylene is preferable in terms of being odorless, having excellent water resistance and chemical resistance, and being capable of mass production at low cost. Also, polypropylene is preferable in terms of being robust, easy to mold, having good color development during printing, and being able to impart gloss.

[0059] Note that biodegradable materials (such as biodegradable plastics like polylactic acid) and biomass materials (renewable bio-derived organic resources such as biomass films excluding fossil resources) can be used as the material for forming the packaging bag 10.

[0060] The form of the resin film forming the packaging bag 10 is not particularly limited, and may be a single-layer film formed of a single layer of the above resin, a laminate film formed by laminating the above resins, a film formed by laminating or laminating the above resin with pulp paper or non-woven fabric, or a mixed film formed of a mixture of two or more of the above resins.

[0061] The thickness of the resin film forming the packaging bag 10 is not particularly limited, preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 70 μm or less, and even more preferably 30 μm or more and 50 μm or less. By setting the thickness of the resin film to 20 μm or more, sufficient strength as a packaging bag for accommodating the sheet S can be ensured, and by setting it to 100 μm or less, the softness and light weight of the packaging bag can be ensured and the cost can be reduced.

[0062] Further, the packaging mode of the packaging bag 10 is not particularly limited. In the present embodiment, for example, packaging (pillow packaging) in which both ends or one end of a tubular resin film folded in a gusset shape is sealed, packaging (caramel packaging) in which both ends of a tubular resin film are folded and sealed, packaging (shrink packaging) in which a heat-shrinkable resin film is heated and adhered to an object to be packaged, or a combination of these can be adopted.

[0063] In the sheet package of the present embodiment, as described above, since the toilet paper formed by laminating a plurality of sets is accommodated in the packaging bag 10 made of a resin film, even if the toilet paper is of a sheet type, storage and transportation are easy. Further, the packaging bag 10 made of a resin film can waterproof the toilet paper.

[0064] Further, in the sheet package of the present embodiment, since the toilet paper accommodated in the packaging bag 10 is composed of the sheet laminate SL, it is possible to use a sheet-type toilet paper that is difficult to tear, soft, and smooth.

Examples

[0065] Hereinafter, the present invention will be specifically described with reference to further examples. The evaluation of the examples and comparative examples was performed by the following tests.

[0066] [Toilet Paper] As a sheet-type toilet paper, as shown in Fig. 1, a sheet laminate SL in which a set of sheets S are alternately folded and stacked so that a set can be pulled out one by one in a pop-up manner was prepared.

[0067] [US basis weight (tear resistance)] The basis weight per ply of the sheet (US basis weight) was measured in accordance with the provisions of JIS P 8124. The unit of US basis weight is g / m 2 It is. The measurement of US basis weight was carried out in a constant temperature and humidity environment (temperature 23°C, humidity 50%). When the US basis weight is 12 g / m 2 or more, the sheet was evaluated as being difficult to tear (〇: good), and when it was less than 12 g / m 2 it was evaluated that the sheet was easy to tear (×: bad).

[0068] [Dry tensile strength] The dry tensile strength of the toilet paper was measured in accordance with the provisions of JIS P 8113 (1998). The toilet paper used was cut into pieces approximately 25 mm (±0.5 mm) wide and 150 mm long in both the longitudinal direction (MD direction) and the transverse direction (CD direction). As the testing machine, a tensile compression testing machine (manufactured by Minebea Co., Ltd., TG-200N) was used. The measurement was carried out by setting the grip interval to 100 mm, clamping both ends of the test piece in the grips of the testing machine, applying a tensile load to the toilet paper piece in the vertical direction, and reading the indicated value (digital value) when the toilet paper broke. The tensile speed in the MD direction was 100 mm / min, and the tensile speed in the CD direction was 50 mm / min. Five sets of samples were prepared for both the MD direction and the CD direction, and each was measured five times, and the average of the measured values was taken as the dry tensile strength in each direction.

[0069] [Elongation rate] Using a universal tensile-compression testing machine (manufactured by Minebea, TG-200N), the elongation rates in the longitudinal direction (MD direction) and transverse direction (CD direction) of a set of sheets were measured. The elongation rate is expressed as the percentage of the length by which the sheet S has elongated when the sheet S is pulled in a predetermined direction in a dry state until it breaks, with respect to the original length of the sheet S before being pulled. Five measurements were taken for both the MD direction and the CD direction, and the average of the measured values was used as the elongation rate for each direction.

[0070] [Two-ply] The ply number of the toilet paper was checked. Those with two plies were evaluated as having the same texture as conventional two-ply roll-type toilet paper (〇: good), and those with three plies were evaluated as having a texture different from that of conventional two-ply roll-type toilet paper (×: bad).

[0071] [Hydrolyzability] The hydrolyzability of the toilet paper was measured. As test pieces of the toilet paper, those cut to 114 mm ± 2 mm in both the longitudinal direction (MD direction) and the transverse direction (CD direction) were prepared. The test pieces were peeled to make one ply and cured at 105°C for 3 minutes. On the other hand, a rotor was placed in a beaker containing 300 ml of water, placed on a magnetic stirrer, and the rotation speed of the rotor was adjusted to 600 ± 10 rpm. A disc-shaped rotor with a diameter of 35 mm was used. When the rotation speed was stable, the test piece was put in, the stopwatch was pressed, and the time measurement was started. The rotation speed once decreased due to the resistance of the test piece, and as the test piece loosened, the rotation speed increased. When the rotation speed recovered to 540 rpm, the stopwatch was stopped, and the time was measured in seconds (s) to evaluate the hydrolyzability. The hydrolyzability was evaluated as good when it was 50 seconds (s) or less.

[0072] [TSA measurement / Softness peak TS7 (softness)] Using a tissue softness measuring device (manufactured by Emtec Electronic, TSA (Tissue Softness Analyzer)), the softness peak TS7 of a set of sheets constituting the sheet laminate SL was measured. The TSA measurement was performed in a thermo-hygrostatic environment (temperature 23°C, humidity 50%). Each measurement was taken 5 times, and the average of the measured values was defined as the softness peak TS7. When the softness peak TS7 was 11.5 or less, the sheet was evaluated as soft (〇: good), and when it exceeded 11.5, the sheet was evaluated as hard (×: bad).

[0073] [TSA Measurement / Smoothness Peak TS750 (Smoothness)] Using a tissue softness measuring device (manufactured by Emtec Electronic, TSA (Tissue Softness Analyzer)), the smoothness peak TS750 of the sheet after being taken out from the sheet package 100 was measured. The TSA measurement was performed in a thermo-hygrostatic environment (temperature 23°C, humidity 50%). Each measurement was taken 5 times, and the average of the measured values was defined as the smoothness peak TS750. When the smoothness peak TS750 was 25 or less, the sheet was evaluated as smooth (〇: good), and when it exceeded 25, the sheet was evaluated as rough (×: bad).

[0074] [Compression Energy WC (Softness Feeling)] Using a compression tester (manufactured by Kato Tech, KES-G5), with each set of 5 sheets stacked such that the stacking direction or thickness direction (Z direction) was perpendicular to the ground, a terminal (contact area 2.0 cm 2 ) was brought into contact with the upper surface of the top sheet at a moving speed of 0.002 cm / second, and the compression energy WC when a load of 50 gf / cm 2 was applied was measured. Five sets of sheets were prepared and each was measured 10 times, and the average of the measured values was defined as the compression energy WC. The unit of the compression energy WC is gf·cm / cm 2 . When the compression energy WC was 0.7 gf·cm / cm 2 or more, the toilet paper was evaluated as having a soft feeling (〇: good), and when it was less than 0.7 gf·cm / cm 2If it was less than this, it was evaluated that the toilet paper did not have a fluffy feeling (×: defective).

[0075] Hereinafter, examples and comparative examples will be described.

[0076] [Example 1] The rice area per ply was 15.3 g / m 2 , the dry tensile strength in the MD direction was 344 cN, the dry tensile strength in the CD direction was 123 cN, the elongation rate in the MD direction was 19.5%, the elongation rate in the CD direction was 4.0%, the sheet size in the MD direction was 224 mm, the sheet size in the CD direction was 212 mm, the number of plies was 2 plies, the number of sets was 130 sets, the product form was a pop-up type, the softness peak TS7 was 9.7, the smoothness peak TS750 was 14.9, and the compression energy WC was 1.01 gf·cm / cm 2 Toilet paper with the above properties was manufactured and evaluated. The results are shown in Table 1.

[0077] [Example 2] The rice area per ply was 15.8 g / m 2 , the dry tensile strength in the MD direction was 324 cN, the dry tensile strength in the CD direction was 159 cN, the elongation rate in the MD direction was 19.4%, the elongation rate in the CD direction was 4.4%, the sheet size in the MD direction was 228 mm, the sheet size in the CD direction was 213 mm, the number of sets was 120 sets, the softness peak TS7 was 11.0, the smoothness peak TS750 was 20.1, and the compression energy WC was 1.19 gf·cm / cm 2 Except for the above, toilet paper was manufactured and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0078] [Example 3] The rice area per ply was 15.0 g / m 2 , the dry tensile strength in the MD direction was 315 cN, the dry tensile strength in the CD direction was 118 cN, the elongation rate in the MD direction was 13.5%, the elongation rate in the CD direction was 3.9%, the sheet size in the MD direction was 223 mm, the sheet size in the CD direction was 214 mm, the softness peak TS7 was 9.5, the smoothness peak TS750 was 14.7, and the compression energy WC was 0.97 gf·cm / cm 2Toilet paper was produced and evaluated in the same manner as in Example 2, except for the following. The results are shown in Table 1.

[0079] [Comparative Example 1] The weight per 1 ply is 12.8 g / m 2 , the dry tensile strength in the MD direction is 396 cN, the dry tensile strength in the CD direction is 87 cN, the elongation rate in the MD direction is 10.8%, the elongation rate in the CD direction is 10.9%, the sheet size in the MD direction is 200 mm, the sheet size in the CD direction is 225 mm, the number of plies is 3 plies, the number of sets is 120 sets, the softness peak TS7 is 8.5, the smoothness peak TS750 is 12.8, and the compression energy WC is 1.19 gf·cm / cm 2 Toilet paper was produced and evaluated in the same manner as in Example 1, except for the following. The results are shown in Table 1.

[0080] [Comparative Example 2] The weight per 1 ply is 11.8 g / m 2 , the dry tensile strength in the MD direction is 399 cN, the dry tensile strength in the CD direction is 87 cN, the elongation rate in the MD direction is 12.4%, the elongation rate in the CD direction is 10.2%, the sheet size in the MD direction is 195 mm, the sheet size in the CD direction is 216 mm, the number of sets is 180 sets, the softness peak TS7 is 11.8, the smoothness peak TS750 is 16.6, and the compression energy WC is 0.48 gf·cm / cm 2 Toilet paper was produced and evaluated in the same manner as in Example 1, except for the following. The results are shown in Table 1.

[0081] [Comparative Example 3] The weight per 1 ply is 12.6 g / m 2 , the dry tensile strength in the MD direction is 345 cN, the dry tensile strength in the CD direction is 84 cN, the elongation rate in the MD direction is 9.2%, the elongation rate in the CD direction is 6.3%, the sheet size in the MD direction is 214 mm, the sheet size in the CD direction is 214 mm, the number of plies is 3 plies, the number of sets is 100 sets, the softness peak TS7 is 8.4, the smoothness peak TS750 is 29.6, and the compression energy WC is 1.23 gf·cm / cm 2 Toilet paper was produced and evaluated in the same manner as in Example 1, except for the following. The results are shown in Table 1.

[0082] [Reference Example 1] Toilet paper with a basis weight per ply of 16.5 g / m 2 , a dry tensile strength in the MD direction of 280 cN, a dry tensile strength in the CD direction of 110 cN, a ply number of 2 plies, a product form of roll type, a softness peak TS7 of 8.8, a smoothness peak TS750 of 20.6, and a compression energy WC of 0.79 gf·cm / cm 2 was produced and evaluated. The results are shown in Table 1.

[0083]

Table 1

[0084] From Table 1, in Examples 1 to 3, the basis weight per ply of the sheet was 12 g / m 2 or more and 20 g / m 2 or less, the smoothness peak TS750 was 25 or less, and the compression energy WC was 0.7 gf·cm / cm 2 or more. For the sheet-type toilet paper, resistance to tearing, two-ply formation, softness, smoothness, and fluffiness were all good.

[0085] On the other hand, in Comparative Examples 1 to 3, the basis weight per ply of the sheet was 12 g / m 2 or more and 20 g / m 2 or less, the smoothness peak TS750 was 25 or less, and the compression energy WC was 0.7 gf·cm / cm 2 or more. For the sheet-type toilet paper that did not satisfy at least one of these conditions, at least one of resistance to tearing, two-ply formation, softness, smoothness, and fluffiness was poor.

[0086] As described above, the embodiments of the present invention have been explained. However, the present invention is not limited to specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims.

Explanation of Reference Signs

[0087] 100 - sheet package S - sheet SL - sheet laminate LT - top surface LB - bottom surface LL - long side surface LS - short side surface 10 - packaging bag 11 - top surface 12 - bottom surface 13 - front surface 14 - back surface 15 - side surface 16 - side surface 20 - take - out opening OP - opening

Claims

1. Toilet paper comprising a plurality of sets of two-ply sheets laminated together, The basis weight per ply of the sheet is 12 g / m ２ or more and 20 g / m ２ or less, and wherein the smoothness peak TS750 measured by the softness measuring device TSA is 25 or less, The compression energy WC under a load of 50 gf / cm when five sheets are stacked ２ is 0.7 gf·cm / cm ２ or more. Toilet paper

2. The toilet paper according to claim 1, wherein the softness peak TS7 measured by the softness measuring device TSA is 11.5 or less.

3. The toilet paper according to claim 1, wherein the dry tensile strength of the sheet in the CD direction is 90 cN or more and 180 cN or less.

4. The toilet paper according to claim 1, wherein the elongation rate of the sheet in the MD direction is 13% or more.

5. The toilet paper according to claim 1, wherein a plurality of sets of the sheets are laminated in a pop-up manner.

6. A sheet package, wherein the toilet paper according to any one of claims 1 to 5 is housed in a resin film packaging bag.

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