Toilet paper and sheet package

Abstract

Provided is toilet paper formed by laminating a plurality of sets of sheets in which two-ply sheets serve as one set, wherein: the basis weight per ply of the sheet is 12 g / m2 to 20 g / m2; the TS750 smoothness peak, as measured by a softness measurement device TSA, is 25 or less; and the compression energy WC under a 50 gf / cm2 load when five sets of the sheets are stacked is 0.7 gf·cm / cm2 or more.

Description

Toilet paper and sheet packaging

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

[0002] Conventional toilet paper is required to have a moderate softness, a certain degree of strength so that it does not tear easily even when used, and the ability to easily disintegrate in water (also known as hydrolytic decomposition), and roll-type toilet paper, in which a long piece of tissue paper is wrapped around a core, is widespread (see, for example, Patent Document 1). Furthermore, roll-type toilet paper is time-consuming to use because it requires the user to use both hands to stack or roll up the cut pieces of tissue paper. From this perspective, sheet-type toilet paper, in which multiple pre-cut sheets of tissue paper are stacked, is known (see, for example, Patent Document 2).

[0003] Japanese Patent No. 7312282 Japanese Patent Application Laid-Open No. 2010-22799

[0004] However, sheet-type toilet paper does not have the softness and smoothness of roll-type toilet paper because the sheets are not damped much during production. Also, while sheet-type toilet paper can be made soft and smooth by weakening the paper strength of the sheet, it becomes more likely to tear and pieces of paper will fall off during use.

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

[0006] The toilet paper according to one aspect of the present invention is a toilet paper made by laminating a plurality of sets of two-ply sheets, and the basis weight per ply of the sheet is 12 g / m ２ 20g / m or more ２ The smoothness peak TS750 measured by a softness measuring device TSA is 25 or less, and when five sets of the sheets are stacked, the smoothness peak TS750 is 50 gf / cm ２ Compression energy under load WC is 0.7 gf cm / cm ２ That's all.

[0007] According to one aspect of the present invention, it is possible to provide a sheet-type toilet paper that is tear-resistant, soft, and smooth.

[0008] 1 is a diagram showing an example of toilet paper according to an embodiment; FIG. 2 is a diagram showing an example of a sheet wrapping body according to an embodiment; FIG. 3 is a diagram showing a state in which toilet paper according to an embodiment is used;

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Common parts in the drawings will be designated by the same reference numerals and their explanations may be omitted. Also, the scale of each component in each drawing may differ from the actual scale.

[0010] In this specification, the directions in the drawings are described using a three-dimensional Cartesian coordinate system with three axial directions (X, Y, and Z). In each drawing, the left-right direction (the longitudinal direction of the sheet stack or sheet packaging) is the X direction, the front-rear direction (the lateral direction of the sheet stack or sheet packaging) is the Y direction, and the up-down direction (the height direction of the sheet stack or sheet packaging) is the Z direction.

[0011] In this specification, deviations in each direction are permitted to the extent that they do not impair the functions and effects of the embodiments. Also, perpendicular may include substantially perpendicular.

[0012] <Toilet Paper> Fig. 1 is a diagram showing an example of toilet paper according to an embodiment. The toilet paper according to this embodiment is made up of a plurality of two-ply sheets stacked together.

[0013] In this specification, a two-ply sheet refers to two sheets stacked on top of each other. Also, in this specification, a stack of multiple sets or multiple sheets of two-ply sheets S, as shown in Figure 1, may be referred to as a sheet stack SL. Also, toilet paper made of such a sheet stack SL may be referred to as sheet-type toilet paper.

[0014] The material of the sheet S is not particularly limited, but is preferably tissue paper. A known composition can be used as the pulp composition of the sheet S. The blending ratio of pulp can be, for example, 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0015] There are no particular limitations on the pulp composition of the sheet S. For example, softwood pulp such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp) and hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp) can be used in any ratio.

[0016] 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. Furthermore, recycled paper pulp may be used as the pulp contained in the sheet S.

[0017] The sheet S may contain a softener. Here, the softener contains a component that imparts flexibility to the sheet S that constitutes the toilet paper. Specifically, the softener has the function of widening the spaces between the pulp fibers, forming air layers between the pulp fibers and penetrating between the pulp fibers, thereby loosening the pulp fibers and softening the sheet S. Furthermore, the softener applied to the pulp surface reduces friction with the skin and makes the sheet S smoother.

[0018] The crepe ratio of the sheet S is optional, but is preferably 20.0% or more and 24.8% or less, more preferably 20.5% or more and 24.5% or less, and even more preferably 21.0% or more and 24.0% or less. The crepe ratio is a value calculated based on the relationship between the Yankee dryer and the take-up reel used in producing the toilet paper sheet S, by ((peripheral speed of Yankee dryer) - (peripheral speed of take-up reel)) / (peripheral speed of Yankee dryer) x 100 (%). By adjusting the crepe ratio to 20.0% or more and 24.8% or less, it is possible to impart a fluffy feel and smoothness to the sheet S.

[0019] The basis weight of the sheet S is 12 g / m per ply.２ 20g / m or more ２ or less, preferably 13 g / m ２ More than 17g / m ２ or less, more preferably 14 g / m ２ 16.5g / m or more ２ The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0020] The thickness of the sheet S is not particularly limited, and may be the paper thickness measured under the environment of JIS P 8111 (1998). For example, the thickness of the sheet S is 210 μm or more and 300 μm or less, preferably 220 μm or more and 290 μm or less, and more preferably 230 μm or more and 280 μm or less per two plies.

[0021] The sheet S may be embossed. Such embossing may be performed by a pressure embossing method in which the sheet S is pressed, a pin embossing method in which a pin is pierced into the sheet S to form irregularities or holes on one side of the sheet S, or a heat embossing method in which a water-soluble adhesive such as starch is heated and melted to bond the stacked sheets S. Of these, the pressure embossing method is preferably used.

[0022] The water-disintegrability of the sheet S (ease of disintegration in water) is arbitrary, but from the viewpoint that the sheet S is used as toilet paper, the water-disintegrability of the sheet S is preferably 50 seconds or less, more preferably 45 seconds or less, and even more preferably 40 seconds or less. Here, the water-disintegrability is determined by placing a rotor rotating at a predetermined number of revolutions in a container containing water, placing a test piece of the sheet in the rotor, and measuring the time [seconds] until the test piece disintegrates.

[0023] The dimensions of the sheet laminate SL can be a length in the longitudinal direction (X direction) of 150 mm or more and 300 mm or less, a width in the transverse direction (Y direction) of 80 mm or more and 150 mm or less, and a height in the height direction or stacking direction (Z direction) of 30 mm or more and 150 mm or less.

[0024] The method for manufacturing the sheet stack SL is not particularly limited. For example, the sheet stack SL can be manufactured using a rotary interfolder, a multi-stand interfolder, or the like. The multi-stand interfolder is a device that manufactures a web by folding and stacking sheets S alternately with a single folding plate.

[0025] From the viewpoint of using the sheets S one by one, the sheet stack SL is preferably a so-called pop-up sheet stack in which the sheets S are alternately stacked in a folded state, as shown in Fig. 3. The form of the sheet stack is not limited to one that can be pulled out in a pop-up manner, and may be a stack of multiple sheets (or multiple sets) simply stacked, or a stack in which each sheet is folded.

[0026] The dry tensile strength in the MD direction of the sheet S is arbitrary, for example, 100 cN or more and 600 cN or less, preferably 200 cN or more and 500 cN or less, and preferably 250 cN or more and 400 cN or less. Here, the MD direction refers to the flow direction or longitudinal direction (Y direction) of the fibers during the production of the toilet paper. The dry tensile strength in the MD direction refers to the strength when the toilet paper is pulled in the MD direction in a dry state.

[0027] The dry tensile strength in the CD direction of the sheet S is 90 cN or more and 180 cN or less, preferably 95 cN or more and 175 cN or less, and preferably 100 cN or more and 170 cN or less. Here, the CD direction refers to the direction perpendicular to the flow direction of the fibers during the production of the toilet paper, or the transverse direction (X direction). The dry tensile strength in the CD direction refers to the strength when the sheet S is pulled in the CD direction in a dry state.

[0028] The elongation percentage in the MD direction of the sheet S is arbitrary and is, for example, 13% or more, preferably 13% to 25%, and more preferably 13% to 22%. Here, the elongation percentage in the MD direction is the length of the sheet S stretched when the sheet S is stretched in the MD direction in a dry state and torn, expressed as a percentage of the original length of the sheet S before being stretched.

[0029] The elongation percentage in the CD direction of the sheet S is 1% or more and 8% or less, preferably 2% or more and 7% or less, and more preferably 3% or more and 6% or less. Here, the elongation percentage in the CD direction is the length of the sheet S stretched when the sheet S is stretched in the CD direction in a dry state and breaks, expressed as a percentage of the original length of the sheet S before being stretched.

[0030] Each set of sheets S constituting the sheet stack SL has a smoothness peak TS750 measured by a softness measuring device TSA of 25 or less, preferably 24 or less, and more preferably 23 or less. The lower limit of the peak TS750 is not particularly limited, but is at most 5 or more.

[0031] Here, the softness measuring device TSA (hereinafter referred to as TSA) refers to a tissue softness measuring device (TSA: Tissue Softness Analyzer) manufactured by Emtec Electronic Co., Ltd. The TSA is a device that measures the properties of flat and soft materials.

[0032] Furthermore, smoothness peak TS750 (hereinafter referred to as TS750) indicates a parameter of smoothness measured by TSA. In this embodiment, the smaller the TS750 value, the smoother the sheet S tends to feel.

[0033] Furthermore, each set of sheets S constituting the sheet laminate SL has a softness peak TS7 measured by TSA of preferably 11.5 or less, more preferably 11.3 or less, and even more preferably 11.1 or less. The lower limit of the peak TS7 is not particularly limited, but is at most 5 or more.

[0034] Here, the softness peak TS7 (hereinafter referred to as TS7) indicates a softness parameter measured by TSA. In this embodiment, the lower the TS7 value, the softer the sheet S tends to feel.

[0035] The toilet paper of this embodiment has a strength of 50 gf / cm when five sets of sheets S are stacked together. ２ Compression energy under load WC is 0.7 gf cm / cm ２or more, preferably 0.8 gf cm / cm ２ More preferably, 0.9 gf cm / cm ２ That's all.

[0036] Here, when five sets of sheets S are stacked, the strength of the sheet is 50 gf / cm ２ The compression energy under load was measured using a compression tester (KES-G5, manufactured by Kato Tech Co., Ltd.) by stacking five sets of sheets S together and pressing the terminals in the stacking direction or thickness direction (Z direction) of the sheets S until the contact area was 2.0 cm. ２ The contact was performed so that the pressure was 50 gf / cm ２ is the amount of compression work when a load of

[0037] 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 50 gf / cm of the laminate of five sets of sheets are ２ By adjusting the compression energy WC under load to each of the predetermined ranges, even if the toilet paper is a sheet type, it is possible to obtain a sheet type toilet paper that is tear-resistant, soft, and smooth.

[0038] In the toilet paper of this embodiment, as described above, the softness peak TS7 measured by TSA is adjusted to a predetermined range, thereby obtaining a softer sheet-type toilet paper.

[0039] In the toilet paper of this embodiment, as described above, the dry tensile strength in the CD direction of the sheet S is adjusted to a predetermined range, thereby obtaining a sheet-type toilet paper that is less likely to tear, softer, and smoother.

[0040] In the toilet paper of this embodiment, as described above, the MD elongation of the sheet S is adjusted to a predetermined range, thereby providing a sheet-type toilet paper that is even more tear-resistant, softer, and smoother.

[0041] In the toilet paper of this embodiment, as described above, multiple sets of sheets S are stacked in a pop-up style, so even though the toilet paper is a sheet type, it can be used hygienically with one hand. In addition, because it can be used one sheet at a time, wasteful use can be reduced.

[0042] <Sheet packaging body> Fig. 2 is a diagram showing an example of a sheet packaging body according to an embodiment. Fig. 3 is a diagram showing a state in which toilet paper according to an embodiment is used. The sheet packaging body 100 according to this embodiment is obtained by containing the toilet paper according to this embodiment described above in a packaging bag 10 made of a resin film. In other words, the sheet packaging body according to this embodiment is obtained by containing the sheet laminate SL described above in the packaging bag 10.

[0043] When the sheet laminate SL is housed in the packaging bag 10, the packaging bag 10 has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, and side surfaces 15 and 16. 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 direction (Y direction), and the side surfaces 15 and 16 face each other in the longitudinal direction (X direction). The side surfaces 15 and 16 are continuous with all of the top surface 11, the bottom surface 12, the front surface 13, and the back surface 14.

[0044] As shown in Figure 1, the sheet stack SL contained in the packaging bag 10 has a top surface LT, a bottom surface LB, a pair of long sides LL, and a pair of short sides LS that face the top surface 11, bottom surface 12, front surface 13, back surface 14, side surfaces 15, and side surfaces 16 of the packaging bag 10, respectively.

[0045] The top surface 11 of the packaging bag 10 is provided with an outlet 20. The outlet 20 allows the sheet S to be pulled out. The outlet 20 is configured as an opening OP, as shown in Fig. 3. The opening OP that configures the outlet 20 may be configured by breaking a tearing score line such as a perforation, as shown in Fig. 2. Here, the tearing score line is an intermittent score line in which cuts and ties (uncut portions between two cuts) are arranged alternately, and when a tie is broken, the adjacent cuts on both sides become continuous cuts.

[0046] The shape of the opening OP that constitutes the outlet 20 is not particularly limited, and may be a straight line, a long and narrow rectangle, an oval, a gourd shape, a dumbbell shape, or the like in a plan view.

[0047] 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 even more preferably 135 mm or more and 180 mm or less.

[0048] The ratio of the length of the outlet 20 (opening OP) to the longitudinal length (X direction) 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 even more preferably 50% or more and 85% or less.

[0049] The width of the outlet 20 (opening OP) in the short direction (Y direction) 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 even more preferably 1 mm or more and 40 mm or less.

[0050] The ratio of the width of the outlet 20 (opening OP) in the short direction (Y direction) to the width of the top surface 11 of the packaging bag 10 in the short 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 more preferably 0.5% or more and 33% or less.

[0051] The packaging bag 10 is made of a resin film. The resin film that constitutes the packaging bag 10 is flexible. There are no particular limitations on the resin used for the resin film, and examples that can be used include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), and polyamide (PA). As the polyethylene, high-density polyethylene, low-density polyethylene, and the like can be used.

[0052] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferred because they are flexible, easy to handle, have high heat-sealing properties, and are inexpensive. Polyethylene is also preferred because it is odorless, has excellent water resistance and chemical resistance, and can be mass-produced at low cost. Polypropylene is also preferred because it is robust, easy to mold, has good color development when printed, and can be given a glossy finish.

[0053] In addition, the materials used to form the packaging bag 10 can be biodegradable materials (biodegradable plastics such as polylactic acid, etc.) or biomass materials (renewable organic resources derived from living organisms, such as biomass film, excluding fossil resources).

[0054] 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-mentioned resin, a laminate film in which the above-mentioned resin is laminated, a film in which the above-mentioned resin is bonded or laminated with pulp paper or nonwoven fabric, or a mixed film formed from a mixture of two or more of the above-mentioned resins.

[0055] The thickness of the resin film forming the packaging bag 10 is not particularly limited, and is preferably 20 μm to 100 μm, more preferably 25 μm to 70 μm, and even more preferably 30 μm to 50 μm. By making the thickness of the resin film 20 μm or more, sufficient strength as a packaging bag for containing the sheet S can be ensured, and by making the thickness 100 μm or less, the softness and lightness of the packaging bag can be ensured and costs can be reduced.

[0056] Furthermore, there are no particular limitations on the packaging form of the packaging bag 10. In this embodiment, for example, packaging in which both ends or either one end of a tubular resin film folded in a gusset shape are sealed (pillow packaging), packaging in which both ends of a tubular resin film are folded and sealed (also called caramel packaging), packaging in which a heat-shrinkable resin film is heated to make it adhere tightly to the packaged object (also called shrink packaging), or a combination of these may be employed.

[0057] In the sheet packaging of this embodiment, as described above, toilet paper made up of multiple stacked sets is contained in a packaging bag 10 made of resin film, making it easy to store and transport even if the toilet paper is in sheet form. In addition, the packaging bag 10 made of resin film makes the toilet paper waterproof.

[0058] Furthermore, in the sheet packaging of this embodiment, the toilet paper contained in the packaging bag 10 is made up of a sheet laminate SL, so that tear-resistant, soft, smooth sheet-type toilet paper can be used.

[0059] The present invention will be described in more detail below with reference to examples. The examples and comparative examples were evaluated by the following tests.

[0060] [Toilet Paper] As a sheet-type toilet paper, a sheet laminate SL was prepared in the form of a product in which a set of sheets S was alternately folded and stacked so that the sheets S could be pulled out one set at a time in a pop-up manner, as shown in FIG. 1 .

[0061] [Basis weight (tear resistance)] The basis weight per ply of the sheet (also called basis weight) was measured in accordance with the provisions of JIS P 8124. The unit of basis weight is g / m ２ The measurement of the basis weight was carried out in a constant temperature and humidity environment (temperature 23°C, humidity 50%). ２ In the above cases, the sheet is evaluated as being difficult to tear (◯: good), and ２ If the value was less than 100%, the sheet was evaluated as easily torn (×: poor).

[0062] [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 was cut to a width of approximately 25 mm (±0.5 mm) x length of approximately 150 mm in both the longitudinal direction (MD) and the transverse direction (CD). The tester used was a tension-compression tester (TG-200N, manufactured by Minebea Co., Ltd.). The measurement was performed by setting the grip spacing to 100 mm, clamping both ends of the test piece to the grips of the tester, applying a tensile load in the vertical direction to the toilet paper piece, 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 in both the MD and CD directions, and measurements were taken five times each. The average of the measured values ​​was used as the dry tensile strength in each direction.

[0063] [Elongation] The elongation of a set of sheets was measured in the machine direction (MD) and the cross direction (CD) using a universal tension and compression tester (TG-200N, manufactured by Minebea Co., Ltd.). The elongation is the length of the sheet S stretched when the sheet S is stretched in a predetermined direction in a dry state to break, expressed as a percentage of the original length of the sheet S before being stretched. Measurements were made five times in each of the MD and CD directions, and the average of the measured values ​​was taken as the elongation in each direction.

[0064] [Two-ply] The number of plies of the toilet paper was checked, and the two-ply toilet paper was evaluated as having the same texture as conventional two-ply roll-type toilet paper (◯: good), while the three-ply toilet paper was evaluated as having a different texture from conventional two-ply roll-type toilet paper (×: poor).

[0065] [Number of sets] When the toilet paper had two or more plies, the number of sets was confirmed.

[0066] [Water-disintegrability] The water-disintegrability of toilet paper was measured. Test pieces of toilet paper were prepared by cutting them into 114 mm ± 2 mm in both the machine direction (MD) and the cross direction (CD). The test pieces were peeled off to form one ply and cured at 105 ° C for 3 minutes. Meanwhile, a rotor was placed in a beaker containing 300 ml of water, placed on a magnetic stirrer, and the rotor rotation speed was adjusted to 600 ± 10 rpm. A disk-shaped rotor with a diameter of 35 mm was used. Once the rotation speed stabilized, the test piece was placed in the beaker, and a stopwatch was pressed to start measuring the time. The rotation speed temporarily decreased due to the resistance of the test piece, and as the test piece unraveled, the rotation speed increased. The stopwatch was stopped when the rotation speed recovered to 540 rpm, and the time was measured in seconds (s) to evaluate the water-disintegrability. A time of 50 seconds (s) or less was evaluated as good.

[0067] [TSA Measurement / Softness Peak TS7 (Softness)] Using a tissue softness measuring device (TSA (Tissue Softness Analyzer) manufactured by Emtec Electronic), the softness peak TS7 of a set of sheets constituting the sheet laminate SL was measured. The TSA measurement was performed five times in a constant temperature and humidity environment (temperature 23 ° C., humidity 50%), and the average of the measured values ​​was taken as the softness peak TS7. If the softness peak TS7 was 11.5 or less, the sheet was evaluated as soft (◯: good), and if it exceeded 11.5, the sheet was evaluated as hard (×: poor). The smaller the TS7 value, the softer the sheet.

[0068] [TSA Measurement / Smoothness Peak TS750 (Smoothness)] Using a tissue softness measuring device (TSA (Tissue Softness Analyzer) manufactured by Emtec Electronic), the smoothness peak TS750 of the sheet after removal from the sheet package 100 was measured. The TSA measurement was performed five times in a constant temperature and humidity environment (temperature 23°C, humidity 50%), and the average of the measured values ​​was taken as the smoothness peak TS750. If the smoothness peak TS750 was 25 or less, the sheet was evaluated as smooth (◯: good), and if it exceeded 25, the sheet was evaluated as rough (×: poor). The smaller the TS750 value, the smoother the sheet.

[0069] [Compression energy WC (softness)] Using a compression tester (KES-G5 manufactured by Kato Tech Co., Ltd.), five sets of sheets were stacked, and each set was placed so that the stacking direction or thickness direction (Z direction) was perpendicular to the ground. A terminal (contact area 2.0 cm) was attached to the top surface of the top sheet. ２ ) was brought into contact with the sample at a moving speed of 0.002 cm / sec and a load of 50 gf / cm ２ The compression energy WC was measured when a load of 1000 kJ / cm was applied. Five sets of sheets were prepared and measurements were taken 10 times for each set, and the average of the measured values ​​was taken as the compression energy WC. The unit of compression energy WC is gf cm / cm. ２ The compression energy WC is 0.7 gf cm / cm ２ If the value is more than 0.7 gf cm / cm, the toilet paper is evaluated as having a fluffy feel (good). ２ If the WC value was less than 1, the toilet paper was evaluated as not having a fluffy feel (×: poor). The larger the WC value, the more easily the sheet is compressed.

[0070] Examples and comparative examples will be described below.

[0071] [Example 1] Basis weight per ply: 15.3 g / m ２, dry tensile strength in MD direction is 344cN, dry tensile strength in CD direction is 123cN, elongation in MD direction is 19.5%, elongation in CD direction is 4.0%, sheet size in MD direction is 224mm, sheet size in CD direction is 212mm, number of plies is 2 plies, number of sets is 130 sets, product form is pop-up type, softness peak TS7 is 9.7, smoothness peak TS750 is 14.9, compression energy WC is 1.01gf cm / cm ２ Toilet paper was produced and evaluated. The results are shown in Table 1.

[0072] [Example 2] Basis weight per ply: 15.8 g / m ２ , dry tensile strength in MD direction 324 cN, dry tensile strength in CD direction 159 cN, elongation in MD direction 19.4%, elongation in CD direction 4.4%, sheet size in MD direction 228 mm, sheet size in CD direction 213 mm, number of sets 120 sets, softness peak TS7 11.0, smoothness peak TS750 20.1, compression energy WC 1.19 gf cm / cm ２ Except for the above, toilet paper was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0073] [Example 3] Basis weight per ply: 15.0 g / m ２ , dry tensile strength in MD direction 315 cN, dry tensile strength in CD direction 118 cN, elongation in MD direction 13.5%, elongation in CD direction 3.9%, sheet size in MD direction 223 mm, sheet size in CD direction 214 mm, softness peak TS7 9.5, smoothness peak TS750 14.7, compression energy WC 0.97 gf cm / cm ２ Except for the above, toilet paper was produced and evaluated in the same manner as in Example 2. The results are shown in Table 1.

[0074] [Comparative Example 1] Basis weight per ply: 12.8 g / m ２, dry tensile strength in MD direction 396cN, dry tensile strength in CD direction 87cN, elongation in MD direction 10.8%, elongation in CD direction 10.9%, sheet size in MD direction 200mm, sheet size in CD direction 225mm, number of plies 3 plies, number of sets 120 sets, softness peak TS7 8.5, smoothness peak TS750 12.8, compression energy WC 1.19gf cm / cm ２ Except for the above, toilet paper was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0075] [Comparative Example 2] Basis weight per ply: 11.8 g / m ２ , dry tensile strength in MD direction 399 cN, dry tensile strength in CD direction 87 cN, elongation in MD direction 12.4%, elongation in CD direction 10.2%, sheet size in MD direction 195 mm, sheet size in CD direction 216 mm, number of sets 180 sets, softness peak TS7 11.8, smoothness peak TS750 16.6, compression energy WC 0.48 gf cm / cm ２ Except for the above, toilet paper was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0076] [Comparative Example 3] Basis weight per ply: 12.6 g / m ２ , dry tensile strength in MD direction 345cN, dry tensile strength in CD direction 84cN, elongation in MD direction 9.2%, elongation in CD direction 6.3%, sheet size in MD direction 214mm, sheet size in CD direction 214mm, number of plies 3 plies, number of sets 100 sets, softness peak TS7 8.4, smoothness peak TS750 29.6, compression energy WC 1.23gf cm / cm ２ Except for the above, toilet paper was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0077] [Reference Example 1] Basis weight per ply is 16.5 g / m ２ , dry tensile strength in MD direction is 280 cN, dry tensile strength in CD direction is 110 cN, number of plies is 2 plies, product form is roll type, softness peak TS7 is 8.8, smoothness peak TS750 is 20.6, compression energy WC is 0.79 gf cm / cm ２Toilet paper was produced and evaluated. The results are shown in Table 1.

[0078]

[0079] From Table 1, in Examples 1 to 3, the basis weight per ply of the sheet was 12 g / m ２ 20g / m or more ２ The smoothness peak TS750 is 25 or less, and the compression energy WC is 0.7 gf cm / cm ２ The sheet-type toilet paper described above was excellent in all respects: tear resistance, two-ply construction, softness, smoothness, and fluffiness.

[0080] On the other hand, in Comparative Examples 1 to 3, the basis weight per ply of the sheet was 12 g / m ２ 20g / m or more ２ Smoothness peak TS750 is 25 or less, compression energy WC is 0.7 gf cm / cm ２ Sheet-type toilet paper that does not satisfy at least one of the above conditions is poor in at least one of tear resistance, two-ply, softness, smoothness, and fluffiness.

[0081] The above-disclosed embodiments include, for example, the following aspects.

[0082] The first aspect of the present invention is a toilet paper made by laminating a plurality of sets of two-ply sheets, and the basis weight per ply of the sheet is 12 g / m ２ 20g / m or more ２ The smoothness peak TS750 measured by a softness measuring device TSA is 25 or less, and when five sets of the sheets are stacked, the smoothness peak TS750 is 50 gf / cm ２ Compression energy under load WC is 0.7 gf cm / cm ２ That's it, we provide toilet paper.

[0083] In the first embodiment, the basis weight per ply of the sheet, the smoothness peak TS750 measured by TSA, and the 50 gf / cm 3 when five sets of sheets are stacked are ２By adjusting the compression energy WC under load to each of the predetermined ranges, even if the toilet paper is a sheet type, it is possible to obtain a sheet type toilet paper that is tear-resistant, soft, and smooth.

[0084] A second aspect of the present invention provides the toilet paper according to the first aspect, in which 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 the TSA to a predetermined range, a softer sheet-type toilet paper can be obtained.

[0085] 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 to a predetermined range, a sheet-type toilet paper that is less likely to tear, softer, and smoother can be obtained.

[0086] A fourth aspect of the present invention provides the toilet paper according to any one of the first to third aspects, wherein the elongation percentage in the MD direction of the sheet is 13% or more. In the fourth aspect, by adjusting the elongation percentage in the MD direction of the sheet to a predetermined range, a sheet-type toilet paper that is even more tear-resistant, even softer, and even smoother can be obtained.

[0087] A fifth aspect of the present invention provides the toilet paper according to any one of the first to fourth aspects, in which a plurality of sets of the sheets are stacked in a pop-up style. In the fifth aspect, by stacking a plurality of sets of sheets in a pop-up style, the toilet paper can be used hygienically with one hand, even if it is a sheet type. Furthermore, since the toilet paper can be used one sheet at a time, wasteful use can be reduced.

[0088] A sixth aspect of the present invention provides a sheet packaging body in which the toilet paper according to any one of the first to fifth aspects is contained in a packaging bag made of resin film. In the sixth aspect, the toilet paper, which is made up of multiple stacked sets, is contained in a packaging bag made of resin film, so that the toilet paper is easy to store and transport, even if it is a sheet type. In addition, the packaging bag made of resin film makes the toilet paper waterproof.

[0089] Although the embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims.

[0090] This application claims priority based on Japanese Patent Application No. 2023-212955, filed on December 18, 2023, the entire contents of which are incorporated herein by reference.

[0091] 100 Sheet packaging body S Sheet SL Sheet stack 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 Dispensing port OP Opening

Claims

1. A toilet paper made by laminating multiple sets of two-ply sheets, the basis weight of each ply of the sheet being 12 g / m ２ 20g / m or more ２ The smoothness peak TS750 measured by a softness measuring device TSA is 25 or less, and when five sets of the sheets are stacked, the smoothness peak TS750 is 50 gf / cm ２ Compression energy under load WC is 0.7 gf cm / cm ２ That's it, toilet paper.

2. The toilet paper according to claim 1, having a softness peak TS7 measured by a softness measuring device TSA of 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 sheet has an elongation percentage in the MD direction of 13% or more.

5. The toilet paper according to claim 1, wherein a plurality of said sheets are stacked in a pop-up fashion.

6. A sheet packaging body comprising the toilet paper according to any one of claims 1 to 5 housed in a packaging bag made of a resin film.

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