Toilet roll package

Abstract

To suppress damage and deformation of a toilet roll, while tightly packing the toilet roll and maintaining water absorption property.SOLUTION: There is provided a toilet roll package 10 in which the row number of the toilet roll 20 is 3 or more and 5 or less, softness of the roll is 2.5 mm or more and 5.0 mm or less, roll density is 0.6 m / cm2 or more and 0.8 m / cm2 or less, a roll diameter is 118 mm or more and 140 mm or less, paper thickness of a toilet paper is 1.1 mm / 10 ply or more and 1.9 mm / 10 ply or less, an HF value of a product PLY by TSA is 85 or more and 100 or less, water absorption speed of the product PLY is 3 sec / 0.1 ml or less, a drop amount of an exterior film 30 is 3 mm or more and 12 mm or less, a value represented by Expression: (drop amount of exterior film 30) / (softness of roll) is 0.3 or more and 4.0 or less, and a value represented by Expression: (drop amount of exterior film 30) / (roll density) is 2 or more and 19 or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a toilet roll package. [Background technology]

[0002] There is a toilet roll package in which a plurality of toilet rolls are packaged together in an exterior film.

[0003] For example, Patent Document 1 discloses a toilet roll package in which toilet rolls are arranged in two rows with their circumferential surfaces butted together between the upper and lower fused parts of the gusset package. In this package, there are two rows of toilet rolls extending from the upper fused part to the lower fused part, and the end faces of the toilet rolls are arranged to face the front and back of the package. It is disclosed that the preferred number of toilet rolls packaged in this package is 8 rolls in total (4 rolls x 2 rows), 10 rolls in total (5 rolls x 2 rows), or 12 rolls in total (6 rolls x 2 rows).

[0004] Patent Document 2 also discloses a toilet roll package in which a film is folded and sealed on both end face sides of a toilet roll. The toilet rolls are arranged so that their outer faces are adjacent to each other with their axes parallel, and both end faces (upper and lower faces) are substantially aligned on the same plane. It is described that the number of toilet rolls packed in the toilet roll package is preferably 4 to 6 rolls (2 to 3 rolls per row), more preferably 4 rolls (2 rolls per row). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-116302 A [Patent Document 2] JP 2018-114988 A Summary of the Invention [Problem to be solved by the invention]

[0006] Generally, it is preferable for the film packaging of a toilet roll package to be tightly wrapped around the toilet roll inside, both to maintain the quality of the toilet roll inside and to improve the aesthetic appearance of the packaging. In addition, in a typical toilet roll package, two rolls of toilet roll are often packaged in film in the height direction (axial direction) and two rolls in the width direction (total of four rolls).

[0007] Incidentally, when wrapping high-absorbency, soft toilet rolls with quality in a caramel-wrap film, it is easy to wrap 4 rolls (2 rolls in the height direction and 2 rolls in the width direction), but if you try to wrap 3 or more rolls in the width direction, the toilet rolls inside tend to move around, making it difficult to maintain tightness, and there is a risk that the toilet rolls will rub against each other and be damaged. On the other hand, if you try to ensure tightness, it is necessary to wrap it tightly, so the toilet rolls inside may be crushed and deformed, and it may not be possible to maintain quality. In particular, double-embossed toilet rolls have a higher paper thickness (specific volume) than single-embossed toilet rolls, so the toilet rolls are more likely to be crushed.

[0008] Therefore, an object of the present disclosure is to provide a toilet roll package that can tightly package toilet rolls, even when packaging two rolls in one row aligned in the axial direction lined up in three to five rows in the width direction, and that can prevent damage and deformation of the toilet rolls while maintaining their water absorbency. [Means for solving the problem]

[0009] In order to solve the above problems, the first aspect of the present invention is a toilet roll package in which toilet rolls, each of which is made of double embossed toilet paper stacked in 2 or more plies and wound into a roll, are arranged in a plurality of rows in the width direction, each row consisting of two rolls arranged in the axial direction, and packaged in an exterior film, wherein the number of rows of the toilet rolls arranged in the width direction is 3 to 5 rows, the roll softness of the toilet roll is 2.5 mm to 5.0 mm, and the winding density of the toilet roll is 0.6 m / cm 2 More than 0.8m / cm 2 the roll diameter of the toilet roll is 118 mm or more and 140 mm or less, the paper thickness of the toilet paper is 1.1 mm / 10 ply or more and 1.9 mm / 10 ply or less, the HF value of the product ply of the toilet paper by TSA is 85 or more and 100 or less, the water absorption speed of the product ply of the toilet paper measured in accordance with the old JIS S 3104 is 3 seconds / 0.1 ml or less, the amount of sagging of the exterior film when a ruler with a mass of 10 g, a thickness of 0.5 mm, and a width of 15 mm is placed on the exterior film wrapped across two adjacent rows of the toilet rolls is 3 mm or more and 12 mm or less, the value represented by the formula: (amount of sagging of the exterior film) / (roll softness of the toilet roll) is 0.3 or more and 4.0 or less, and the value represented by the formula: (amount of sagging of the exterior film) / (winding density of the toilet roll) is 2 or more and 19 or less.

[0010] A second aspect of the present invention is the toilet roll packaging of the first aspect, wherein the basis weight of the toilet paper product ply is 30 g / m 2 More than 50g / m 2 The following is the result.

[0011] A third aspect of the present invention is the toilet roll packaging of the first aspect or the second aspect, wherein the specific volume of the toilet paper is 6 cm 3 / g or more 9cm 3 / g or less.

[0012] A fourth aspect of the present invention is the toilet roll packaging of the first aspect or the second aspect, wherein the roll length of the toilet roll is 34 m or more and 57 m or less.

[0013] A fifth aspect of the present invention is the toilet roll packaging of the first aspect or the second aspect, wherein the roll mass per 114 mm width of the toilet roll is 155 g or more and 275 g or less.

[0014] A sixth aspect of the present invention is the toilet roll packaging of the first aspect or the second aspect, wherein the roll density of the toilet roll is 0.08 g / cm 3 More than 0.18g / cm 3 The following is the result.

[0015] A seventh aspect of the present invention is the toilet roll packaging of the first aspect or the second aspect, wherein the toilet paper product ply has a tensile strength in the MD direction when dry (DMDT) based on JIS P 8113 of 2.0 N / 25 mm or more and 5.5 N / 25 mm or less.

[0016] An eighth aspect of the present invention is the toilet roll packaging of the first aspect or the second aspect, wherein the tensile strength in the CD direction when dry based on JIS P 8113 of the toilet paper product PLY (DCDT) is 0.6 N / 25 mm or more and 1.6 N / 25 mm or less. Effect of the Invention

[0017] According to the present disclosure, it is possible to provide a toilet roll package that can tightly package toilet rolls consisting of two rolls arranged in one row in the axial direction, even when the toilet rolls are packaged in three to five rows in the width direction, and that can prevent damage and deformation of the toilet rolls while maintaining their water absorbency. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of a toilet roll packaging according to an embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. 1 is a diagram showing a method for measuring the amount of sagging of an exterior film in a toilet roll packaging body. [Figure 4] FIG. 11 shows modified examples of toilet roll packaging, where (a) shows four rows of toilet rolls arranged in the width direction, and (b) shows five rows of toilet rolls arranged in the width direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] An embodiment of the present invention will be described in detail below, but the following embodiment is presented for illustrative purposes, and the present invention is not limited to the embodiment described below. The axial direction means the axial direction of the toilet roll, which is the X direction in the figure. The width direction means the direction perpendicular to the axial direction, which is the direction in which the rows of toilet rolls are lined up, which is the Y direction in the figure. The Z direction in the figure is perpendicular to the axial direction and the width direction, and indicates the thickness direction of the toilet roll packaging.

[0020] Fig. 1 is a perspective view of a toilet roll packaging according to one embodiment of the present invention. Fig. 2 is a perspective view of a toilet roll. Fig. 3 is a diagram showing a method for measuring the amount of sagging of an exterior film in a toilet roll packaging. Fig. 4 is a diagram showing modified examples of toilet roll packaging, (a) showing four rows of toilet rolls arranged in the width direction, and (b) showing five rows of toilet rolls arranged in the width direction.

[0021] <Toilet roll packaging> As shown in Fig. 1, the toilet roll packaging 10 according to this embodiment (hereinafter sometimes simply referred to as "package 10") is produced by arranging toilet rolls 20 in multiple rows in the width direction (Y direction), with each row consisting of two rolls arranged in the axial direction (X direction), and packaging the rows in an exterior film 30. The toilet roll 20 is produced by winding up double embossed toilet paper 20a (see Fig. 2) of 2 or more plies into a roll.

[0022] In the toilet roll packaging 10 according to this embodiment, as described below, the number of rows of the toilet roll 20, the roll softness, winding density, winding diameter, the paper thickness of the toilet paper 20a (see FIG. 2), the HF value by TSA, the water absorption speed, the sagging amount of the exterior film 30, the relationship between the sagging amount of the exterior film 30 and the roll softness, and the relationship between the sagging amount of the exterior film 30 and the winding density are appropriately set. As a result, according to this embodiment, even when one row of two rolls of toilet rolls 20 arranged in the axial direction are packaged in three to five rows in the width direction, it is possible to provide a toilet roll packaging 10 that can tightly package the toilet roll 20 and prevent damage and deformation of the toilet roll 20 while maintaining water absorption.

[0023] The details of each component are as follows:

[0024] As shown in Fig. 1, the toilet roll packaging 10 of this embodiment has toilet rolls 20, each of which is made by winding up toilet paper 20a in a roll, linearly arranged in multiple rows (three rows (six rolls in total) in Fig. 1) in the width direction, with two rolls arranged in the axial direction as one row, and then caramel-wrapped in an exterior film 30. Caramel wrapping makes it easier to maintain the tightness of the packaging. Therefore, caramel wrapping is preferred.

[0025] Caramel packaging is known. For example, a plurality of toilet rolls 20 are arranged in three to five rows (three rows in this embodiment) in the width direction on a sheet-like exterior film 30, and the exterior film 30 is wrapped around the circumferential surface of the toilet rolls 20 to form a tube. Then, of the exterior film 30 protruding from both ends in the axial direction of the plurality of toilet rolls 20, two opposing flap-shaped sides are folded against each other, and then another two opposing flap-shaped sides are folded against each other in the same manner, and these folded parts are sealed by heat fusion or the like. In this way, both end faces in the axial direction of each row of the caramel-packaged toilet rolls 20 are positioned on approximately the same plane in each row and face the top surface 11 and bottom surface 12 of the packaging body 10.

[0026] (Number of rows of toilet rolls) The number of rows of the toilet rolls 20 arranged in the width direction is 3 to 5 rows. By setting the number of rows of the toilet rolls 20 to 3 to 5 rows, even when the toilet rolls 20 are highly absorbent and soft, they can be tightly packed, and the toilet rolls 20 are less likely to be damaged or deformed. The number of rows of the toilet rolls 20 is more preferably 3 to 4 rows, and even more preferably 3 rows. Note that, although FIG. 1 illustrates a state in which the toilet rolls 20 are packed in three rows (total of six rolls) arranged in the width direction, this is not limited thereto. For example, as shown in FIG. 4(a), the toilet roll package 10A may be a package in which the toilet rolls 20 are packed in four rows (total of eight rolls) arranged in the width direction, or as shown in FIG. 4(b), the toilet roll package 10B may be a package in which the toilet rolls 20 are packed in five rows (total of ten rolls) arranged in the width direction.

[0027] <Exterior film> The exterior film 30 is a resin film that packages multiple toilet rolls 20. The exterior film 30 covers, in all directions, multiple toilet rolls 20 arranged in three to five rows (three rows in this embodiment) in the width direction, with two rolls in one row.

[0028] Examples of the resin film used for the exterior film 30 include LDPE (low density polyethylene), LLDPE (linear low density polyethylene), HDPE (high density polyethylene), CPP (unoriented polypropylene), or a film obtained by blending or mixing these materials. In addition, the film may be a film obtained by laminating, coating, or multi-layering a different material on these films. Examples of the different materials include OPP (oriented polypropylene), EVOH (ethylene vinyl alcohol copolymer), Ny (nylon), PET (polyethylene terephthalate), PVDC (polyvinylidene chloride), and the like. Among these, the resin film used for the exterior film 30 is preferably LLDPE, LDPE, or a mixture of these, and most preferably LDPE. By using LLDPE, LDPE, or a mixture of these as the resin film used for the exterior film 30, the toilet roll 20 can be tightly packed even when it is highly absorbent and soft, and the toilet roll 20 is less likely to be damaged or deformed.

[0029] <Toilet roll> As shown in FIG. 2, the toilet roll 20 is made by winding up 2 or more plies of double embossed toilet paper 20a into a roll, and has a core 21 such as a cylindrical paper tube or a cylindrical space in the center.

[0030] (core) The core 21 is present in the center of the toilet roll 20. The core 21 may be a cylindrical paper tube, or may be a cylindrical space. In this embodiment, the core 21 of the toilet roll 20 has a paper tube, and the toilet paper 20a is wound around the paper tube. In the following description, the core 21 means the core 21 that is a cardboard tube, unless otherwise specified.

[0031] (Core outer diameter) The outer diameter DI of the core 21 (hereinafter referred to as the "core outer diameter DI") is preferably 25 mm or more and 48 mm or less. If the core outer diameter DI is smaller than 25 mm, the hole becomes too small, the winding density becomes low, and the toilet roll 20 becomes easily deformed. On the other hand, if the core outer diameter DI is larger than 48 mm, the winding diameter of the toilet roll 20 becomes too large. The lower limit of the above range of the core outer diameter DI is more preferably 35 mm or more, and even more preferably 37 mm or more. The upper limit of the above range of the core outer diameter DI is more preferably 46 mm or less, and even more preferably 43 mm or less. In the following description, the core outer diameter DI means the outer diameter of the cardboard tube when the core 21 has a cardboard tube, and means the diameter of the cylindrical space (center hole) when the core 21 does not have a cardboard tube.

[0032] (Core weight) The weight of the core 21 (hereinafter referred to as "core weight") is preferably 4.0 g or more and 7.0 g or less. The lower limit of the above range of the core weight is more preferably 4.5 g or more, and even more preferably 5.0 g or more. The upper limit of the above range of the core weight is more preferably 6.5 g or less, and even more preferably 6.0 g or less.

[0033] (Roll diameter) The roll diameter (outer diameter) DR of the toilet roll 20 (hereinafter sometimes simply referred to as "roll diameter DR") is 118 mm or more and 140 mm or less. If the roll diameter DR is smaller than 118 mm, the roll diameter DR becomes too small and the roll length becomes too short. On the other hand, if the roll diameter DR is larger than 140 mm, the roll diameter DR becomes too large. The lower limit of the above range of the roll diameter DR is more preferably 122 mm or more, and even more preferably 125 mm or more. The upper limit of the above range of the roll diameter DR is more preferably 138 mm or less, and even more preferably 135 mm or less.

[0034] (Volume length) The roll length of the toilet roll 20 (hereinafter sometimes simply referred to as "roll length") is preferably 34 m or more and 57 m or less. If the roll length is shorter than 34 m, the roll length will be too short and the roll diameter will be too small. On the other hand, if the roll length is longer than 57 m, the roll diameter will be too large. The lower limit of the above range of the roll length is more preferably 36 m or more, and even more preferably 38 m or more. The upper limit of the above range of the roll length is more preferably 52 m or less, and even more preferably 46 m or less.

[0035] (winding density) The winding density of the toilet roll 20 (hereinafter sometimes simply referred to as "winding density") is 0.6 m / cm 2 More than 0.8m / cm 2 The winding density is 0.6m / cm 2 If the winding density is smaller (lower) than 0.8 m / cm, the toilet roll 20 becomes too soft and easily deforms. 2 If the winding density is greater (higher) than 0.63 m / cm, the toilet roll 20 will be too hard and will be inferior in softness. 2 More preferably, it is 0.66 m / cm or more. 2 The upper limit of the above range of the winding density is preferably 0.79 m / cm or more. 2 More preferably, it is 0.78 m / cm or less. 2 It is even more preferable that:

[0036] The winding density is expressed by the following formula (1). Winding density = (winding length × number of plies) ÷ (cross-sectional area of ​​toilet roll 20) (1) The cross-sectional area of ​​the toilet roll 20 is expressed by the following formula (2). Cross-sectional area of ​​toilet roll 20=(cross-sectional area of ​​toilet roll 20 at winding diameter DR (outer diameter))−(cross-sectional area of ​​core outer diameter DI) (2)

[0037] For example, in the case of a winding length of 43 m, 2 plies, winding diameter (DR) of 123 mm, and core outer diameter (DI) of 37 mm, winding density = (43 m x 2) ÷ {3.14 x (123 mm ÷ 2 ÷ 10) 2 -3.14×(37mm÷2÷10) 2}=0.80m / cm 2 It becomes.

[0038] (Roll softness) When evaluating the softness of the toilet roll 20, the "roll softness" described below can be used to evaluate the softness of the toilet roll 20 when held in the hand.

[0039] The roll softness of the toilet roll 20 (hereinafter sometimes simply referred to as "roll softness") is measured using a compression tester (Handy Compression Tester KES-G5 manufactured by Kato Tech Co., Ltd.) as follows. The direction parallel to the axial direction of the toilet roll 20 is defined as the height direction, and the direction perpendicular to the tangent to the circumference of the toilet roll 20 is defined as the radial direction.

[0040] First, an acrylic pipe is inserted into the core 21 of the toilet roll 20. The thickness of the acrylic pipe is 2 mm. The length of the acrylic pipe is about 10 mm longer than the roll width (length in the axial direction) of the toilet roll 20. The outer diameter of the acrylic pipe is slightly smaller than the inner diameter of the core 21 of the toilet roll 20, and is large enough that the toilet roll 20 does not move under its own weight when the axial direction of the toilet roll 20 is placed vertically after the acrylic pipe is inserted. If it is difficult to insert the acrylic pipe into the core 21 and the outer diameter of the acrylic pipe is to be slightly smaller, the thickness of the acrylic pipe may be slightly reduced using waterproof paper or the like. The mass of the acrylic pipe is about 32 g when the length is 120 mm and the outer diameter is 38 mm.

[0041] Next, the toilet roll 20 is placed horizontally on the table of the test machine so that the axial direction of the toilet roll 20 is horizontal. Then, the above-mentioned KES-G5 compression tool (contact area 2.0 cm 2 ) is placed at the center of the axial direction of the toilet roll 20. 2) is pressed from above in the radial direction at a speed of 10 mm / min. The pressure with which the compression element presses the roll is 5 gf / cm 2 The indentation depth at this time is T0, and the pressure is 150gf / cm 2 The pressing depth at this time is defined as Tm, and (Tm-T0) is measured as "roll softness". Five rolls are measured at five positions (0°, 30°, 60°, 90°, 135°), and a total of 25 measurement results are averaged. The axial position when the compression element is pressed into the toilet roll 20 does not have to be the axial center, except for a range of 20 mm from both ends of the toilet roll 20 in the axial direction. In measuring the roll softness of the toilet roll 20 of the present invention, the compression element is pressed into the vicinity of the middle between the axial center and the ends of the toilet roll 20.

[0042] The roll softness of the toilet roll 20 is 2.5 mm or more and 5.0 mm or less. If the roll softness of the toilet roll 20 is less than 2.5 mm, it will be too hard and will have poor softness. If the roll softness of the toilet roll 20 is more than 5.0 mm, it will be too soft and will not be tight enough when wrapped in an exterior film 30. The lower limit of the above range of roll softness is more preferably 3.0 mm or more, and even more preferably 3.5 mm or more. The upper limit of the above range of winding density is more preferably 4.5 mm or less, and even more preferably 4.0 mm or less.

[0043] (Roll weight) The roll mass of the toilet roll 20 per 114 mm of width (hereinafter, sometimes simply referred to as "roll mass") is preferably 155 g or more and 275 g or less. If the roll mass is lower than 155 g, the winding length becomes too short and the winding diameter becomes too small. On the other hand, if the roll mass is higher than 275 g, the winding diameter becomes too large. The lower limit of the above range of the roll mass is more preferably 165 g or more, and even more preferably 170 g or more. The upper limit of the above range of the roll mass is more preferably 245 g or less, and even more preferably 205 g or less. When the toilet roll 20 has a paper tube as the core 21, the roll mass is the mass including the core (paper tube) 21. The roll mass is the mass per 114 mm of width (roll width: axial length). When the roll width is not 114 mm, it is converted to the mass per 114 mm by proportional calculation.

[0044] (Roll density) The roll density of the toilet roll 20 (hereinafter sometimes simply referred to as "roll density") is 0.08 g / cm 3 More than 0.18g / cm 3 The roll density is preferably 0.08 g / cm or less. 3 If the roll density is less than 0.18 g / cm, the toilet roll 20 becomes too soft and easily deforms. 3 If it is greater than 0.10 g / cm, the toilet roll 20 becomes too hard and has poor softness. 3 More preferably, it is 0.12 g / cm or more. 3 The upper limit of the above range of the roll density is preferably 0.17 g / cm. 3 More preferably, it is 0.16 g / cm or less. 3 It is even more preferable that:

[0045] The roll density of the toilet roll 20 is expressed as (roll mass of the toilet roll 20)÷(volume of the toilet roll 20), and is calculated by the following formula (3). Roll density = roll mass ÷ [{(cross-sectional area of ​​the portion of the toilet roll 20 with the roll diameter DR (outer diameter)) - (cross-sectional area of ​​the portion of the core with the outer diameter DI)} × roll width (calculated based on 114 mm)] (3)

[0046] For example, if the roll mass per 114 mm of roll width is 186 g, the roll diameter (DR) is 123 mm, and the core outer diameter (DI) is 37 mm, the roll density = 186 g ÷ {(3.14 × (123 mm ÷ 2 ÷ 10) 2 -3.14×(37mm÷2÷10) 2 )×(114mm÷10)}=0.15g / cm 3 It becomes.

[0047] <Toilet paper> The toilet paper 20a is a sheet of 2 or more plies that has been double embossed. The number of plies of the toilet paper 20a is more preferably 2 or more and less than 3 plies, and even more preferably 2 plies. The embossing pattern preferably includes a line shape. By making the embossing pattern linear, the embossing is less likely to be crushed even when pressure is applied by the exterior film 30 or the adjacent toilet roll 20, and the water absorbency and softness of the sheet can be maintained. Note that double embossing refers to embossing each sheet of 2 plies separately. Also, the toilet paper 20a that has been double embossed and is stacked in 2 or more plies means that the toilet paper 20a that has been double embossed has at least 2 plies. Also, the linear embossing pattern means an embossing pattern that is 3 mm or longer in length. In addition, the double embossed sheet of 2 or more plies is preferably bonded with ply bond glue or water, more preferably with water, which can prevent damage and deformation of the toilet roll 20 while maintaining the water absorbency of the toilet paper 20a.

[0048] (paper thickness) The paper thickness per 10 ply of the toilet paper 20a (hereinafter simply referred to as the "paper thickness of the toilet paper 20a") is 1.1 mm / 10 ply or more and 1.9 mm / 10 ply or less. If the paper thickness of the toilet paper 20a is thinner (lower) than 1.1 mm / 10 ply, the toilet roll 20 becomes too soft and easily deformed. On the other hand, if the paper thickness of the toilet paper 20a is thicker (higher) than 1.9 mm / 10 ply, the softness of the toilet roll 20 becomes inferior. The lower limit of the above range of the paper thickness of the toilet paper 20a is more preferably 1.2 mm / 10 ply or more, and even more preferably 1.3 mm / 10 ply or more. The upper limit of the above range of the paper thickness of the toilet paper 20a is more preferably 1.7 mm / 10 ply or less, and even more preferably 1.5 mm / 10 ply or less. In addition, "ply" included in the unit is synonymous with "PLY", and the same applies in the following explanation.

[0049] The paper thickness of the product ply of the toilet paper 20a is preferably 0.22 mm / product ply or more and 0.38 mm / product ply or less. The product ply means the number of plies of the toilet paper 20a as a product. In other words, the paper thickness of the product ply means the paper thickness of the toilet paper 20a of the number of plies as a product. For example, if the toilet paper 20a is a 2-ply product, it means the paper thickness of 2 plies, and if it is a 3-ply product, it means the paper thickness of 3 plies. The lower limit of the above range of the paper thickness of the product ply of the toilet paper 20a is more preferably 0.24 mm / product ply or more, and even more preferably 0.26 mm / product ply or more. The upper limit of the above range of the paper thickness of the product ply of the toilet paper 20a is more preferably 0.34 mm / product ply or less, and even more preferably 0.30 mm / product ply or less.

[0050] The paper thickness is measured by the following method. The device used is a thickness gauge (Ozaki Manufacturing's "PEACOCK" dial thickness gauge). The measurement conditions are a measurement load of 3.7 kPa and a gauge diameter of 30 mm. The sample is placed between the gauge and the measurement table, and the gauge is read when the gauge is lowered at a speed of 1 mm per second or less. When measuring the paper thickness per 10 ply, 10 ply (5 sets of 2 ply sheets) are stacked and measured, and the measurement is repeated 10 times and the measurement results are averaged. In addition, in the case of a 3 ply sheet, 9 ply (3 sets of 3 ply sheets) are stacked and measured, and the paper thickness of 1 ply is calculated from the measurement results and converted to 10 ply. The paper thickness of the product ply is calculated by proportional calculation. The paper thickness is measured at 10 points in total, including 5 different points in the MD direction of the sheet and 5 points shifted from these 5 points in the CD direction. Regarding the measurement positions for the paper thickness, it is important to measure ten different points, but the exact positions are not important.

[0051] (Basic weight) The basis weight of the product ply of the toilet paper 20a is measured according to JIS P 8124 and is 30 g / m 2 More than 50g / m 2 The basis weight of the product ply of the toilet paper 20a is preferably 30 g / m 2 On the other hand, if the basis weight of the product PLY of the toilet paper 20a is 50 g / m 2 If the roll density is larger than 33 g / m, the roll density will be high and the roll softness will be hard. 2 More preferably, it is 36 g / m or more. 2 The upper limit of the above range of the basis weight of the product ply of the toilet paper 20a is 45 g / m 2 More preferably, it is 40 g / m or less. 2 It is even more preferable that:

[0052] (specific volume) The specific volume of toilet paper 20a is 6 cm 3 / g or more 9cm 3 / g or less. 3 If the specific volume of the toilet paper 20a is less than 9 cm3 / g, the softness and absorbency are inferior. 3 If the ratio is larger than 1 / g, the roll softness becomes hard. The specific volume of the toilet paper 20a is calculated by dividing the paper thickness of a predetermined number of plies (e.g., product ply) of the toilet paper 20a by the basis weight of the predetermined number of plies, and expressing the volume cm per unit g. 3 The lower limit of the above range of the specific volume of the toilet paper 20a is 6.5 cm 3 / g or more is more preferable, and 3 / g or more. The upper limit of the above range of the specific volume of the toilet paper 20a is 8.5 cm 3 / g or less is more preferable, and 3 It is more preferable that the molecular weight is not more than 1 / g.

[0053] (Tensile strength DMDT) The tensile strength DMDT in the MD (Machine Direction) direction when dry based on JIS P 8113 in the product ply of the toilet paper 20a (hereinafter sometimes referred to as "tensile strength DMDT in the product ply") is preferably 2.0 N / 25 mm or more and 5.5 N / 25 mm or less. The lower limit of the above range of the tensile strength DMDT in the product ply is more preferably 2.5 N / 25 mm or more, and even more preferably 3.0 N / 25 mm or more. The upper limit of the above range of the tensile strength DMDT in the product ply is more preferably 4.5 N / 25 mm or less, and even more preferably 4.0 N / 25 mm or less.

[0054] (Tensile strength DCDT) The tensile strength DCDT in the cross direction (CD) when dry based on JIS P 8113 in the product ply of the toilet paper 20a (hereinafter sometimes referred to as "tensile strength DCDT in the product ply") is preferably 0.6 N / 25 mm or more and 1.6 N / 25 mm or less. The lower limit of the above range of the tensile strength DCDT in the product ply is more preferably 0.8 N / 25 mm or more, and even more preferably 1.0 N / 25 mm or more. The upper limit of the above range of the tensile strength DCDT in the product ply is more preferably 1.4 N / 25 mm or less, and even more preferably 1.2 N / 25 mm or less.

[0055] (Measurement of tensile strength) The tensile strengths DMDT and DCDT of the product PLY of the toilet paper 20a are measured based on JIS P 8113. For example, they can be measured using a Tensilon universal testing machine STB-1225S (manufactured by A&D Co., Ltd.) by a method conforming to JIS P 8113. However, the test piece has a width dimension (direction perpendicular to the tensile direction of the Tensilon universal testing machine) of 25 mm, a gripping distance of 100 mm, and a tensile speed of 300 mm / min, and is measured after being kept in an equilibrium state under the temperature and humidity conditions specified in JIS P 8111 (23±1°C, 50±2% RH).

[0056] If the tensile strengths DMDT and DCDT are lower than the lower limit of the above range (2.0 N / 25 mm, 0.6 N / 25 mm), the toilet roll 20 will be easily damaged. On the other hand, if the tensile strengths DMDT and DCDT are higher than the upper limit of the above range (5.5 N / 25 mm, 1.6 N / 25 mm), the softness will be inferior.

[0057] (HF (hand feel) value) The HF value (hereinafter sometimes simply referred to as "HF value") of the toilet paper 20a product PLY measured by a TSA (tissue softness measuring device) is 85 or more and 100 or less. If the HF value is lower than 85, the water absorbency and softness will be poor. On the other hand, if the HF value is higher than 100, the roll will be too soft and prone to deformation. The HF value can be adjusted by adjusting the raw material composition, basis weight, strength, etc. The lower limit of the above range of HF value is more preferably 87 or more, and even more preferably 90 or more.

[0058] The HF value using the tissue softness measuring device TSA is measured by setting the device's algorithm to TP II and using a sample of toilet paper 20a processed into a circle with a diameter of about 113 mm. The measurement is performed on the surface side of the toilet paper 20a of the sample (the surface side that will be on the outside in the radial direction when rolled). The measuring device used for this is described in detail in, for example, JP 2013-236904 A. The above patent documents can be referenced for the measurement method using the tissue softness measuring device TSA.

[0059] (Water absorption rate) The water absorption speed of the toilet paper 20a product PLY measured in accordance with the old JIS S 3104 (hereinafter, sometimes simply referred to as the "water absorption speed of the toilet paper 20a") is 3 seconds / 0.1 ml or less. The water absorption speed of the toilet paper 20a is expressed as the time it takes for a drop of 0.1 ml of purified water to be absorbed when the water droplet is dropped onto the toilet paper 20a under the temperature and humidity conditions specified in JIS P 8111 (23±1°C, 50±2% RH). If the water absorption speed of the toilet paper 20a is slower than 3 seconds / 0.1 ml, the water absorption is inferior. The water absorption speed of the toilet paper 20a can be adjusted by adjusting the raw material composition, adjusting the basis weight, etc. The upper limit of the above range of the water absorption speed of the toilet paper 20a is more preferably 2.5 seconds / 0.1 ml or less, and even more preferably 2 seconds / 0.1 ml or less.

[0060] (Amount of exterior film sagging) As described above, when highly absorbent and soft toilet rolls 20 are packed in three or more rows in the width direction, the toilet rolls 20 inside tend to move, making it difficult to maintain tightness, and there is a risk that the toilet rolls 20 may rub against each other and be damaged. On the other hand, if the toilet rolls 20 are packed too tightly in an attempt to ensure tightness, the toilet rolls 20 inside may be crushed and deformed, making it impossible to maintain quality. Therefore, by specifying the degree of sagging of the exterior film 30, damage and deformation of the toilet rolls 20 are suppressed while ensuring tightness.

[0061] The degree of sagging of the exterior film 30 is measured as shown in Figure 3. First, the toilet roll packaging 10 is placed on a stand or the like so that the axial direction of the toilet roll 20 is horizontal. Next, a stainless steel first ruler S having a mass of 64 g, a thickness of 1.0 mm, a width of 25 mm and a scale length of 300 mm is placed across two rows of toilet rolls 20 adjacent in the width direction (toilet rolls 20A and 20B in Figure 3) so that the plate surface of the first ruler S is in contact with the exterior film 30. The surface (line) of the first ruler S that is in contact with the exterior film 30 at this time is taken as the reference line SL.

[0062] Next, a second ruler (ruler) R is placed on approximately the center between the toilet rolls 20A and 20B of the exterior film 30 wrapped across two rows of toilet rolls 20A and 20B adjacent in the width direction. The second ruler R is a stainless steel ruler with a mass of 10 g, a thickness of 0.5 mm, a width of 15 mm, and a scale length of 150 mm. The second ruler R is placed on the exterior film 30 approximately in the center between the toilet rolls 20A and 20B so that the width direction Rw of the second ruler R is parallel to the end face of the toilet roll 20 (the width direction (Y direction) perpendicular to the axial direction L). At this time, the distance (drop amount) D from the reference line SL to the tip (lower end) of the second ruler R is measured.

[0063] The distance D from the reference line SL to the tip of the second ruler R is measured on the front side of one toilet roll package 10 at positions 25% of the height h (axial length; see FIG. 1) of the toilet roll package 10 from both ends and at three positions in the center. In the case of 6 rolls, the above three positions are measured between each of the three rows of toilet rolls 20 (total of six positions), in the case of 8 rolls, the above three positions are measured between each of the four rows of toilet rolls 20 (total of nine positions), and in the case of 10 rolls, the above three positions are measured between each of the four rows of toilet rolls 20 (total of twelve positions). That is, the number of measurement positions is a value expressed by the formula: (three positions spaced apart in the axial direction) x (number of rows - 1). The values ​​of the distance D at each position are then averaged and used as the amount of sagging of the exterior film 30. As the first ruler S and the second ruler R, for example, a "Straight Scale Silver" by Shinwa Measurement Co., Ltd. can be used.

[0064] The amount of sagging of the exterior film 30 of the toilet roll packaging 10 measured in this manner is 3 mm or more and 12 mm or less. If the amount of sagging of the exterior film 30 is shorter than 3 mm, the packaging becomes too tight, and the toilet roll 20 is crushed and deformed. On the other hand, if the amount of sagging of the exterior film 30 is longer than 12 mm, tightness cannot be ensured. The upper limit of the above range of the amount of sagging of the exterior film 30 is more preferably 10 mm or less, and even more preferably 9 mm or less.

[0065] (Relationship between exterior film sagging and roll softness) The value A, which is expressed by the following formula (4) and which indicates the relationship between the amount of sagging of the exterior film 30 and the roll softness of the toilet roll 20, is 0.3 or more and 4.0 or less. Value A = (amount of sagging of the exterior film (mm)) / (softness of the toilet roll (mm)) (4) If the value A is lower than 0.3, the toilet roll 20 becomes too soft and is crushed and deformed. On the other hand, if the value A is higher than 4.0, tightness cannot be ensured. The lower limit of the above range of the value A is more preferably 0.8 or more, and even more preferably 1.0 or more. The upper limit of the above range of the value A is more preferably 3.0 or less, and even more preferably 2.5 or less.

[0066] (Relationship between exterior film sagging and winding density) The value B, which is expressed by the following formula (5) and which indicates the relationship between the amount of sagging of the exterior film 30 and the winding density of the toilet roll 20, is 2 or more and 19 or less. Value B = (amount of sagging of the exterior film (mm)) / (toilet roll winding density (m / cm 2 ))···(5) If the value B is lower than 2, tightness cannot be ensured. On the other hand, if the value B is higher than 19, the toilet roll 20 will be crushed and deformed. The lower limit of the above range of the value B is more preferably 5 or more, and even more preferably 8 or more. The upper limit of the above range of the value B is more preferably 15 or less, and even more preferably 13 or less.

[0067] Although the present invention has been described based on the above embodiment, the present invention is not limited to the contents of the above embodiment, and can be modified as appropriate without departing from the scope of the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. EXAMPLES

[0068] The present embodiment will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0069] (Examples 1 to 15 and Comparative Examples 1 to 7) Under the conditions shown in Tables 1 and 2, toilet roll packages of Examples 1 to 15 and Comparative Examples 1 to 7 were produced. Each toilet roll package was evaluated in the following three ways (evaluation of "packaging tightness and roll damage", evaluation of "water absorbency", and evaluation of "roll softness"). Each evaluation was performed after maintaining the package in equilibrium under temperature and humidity conditions (23±1°C, 50±2% RH) specified in JIS P8111. Each parameter other than the evaluations below was measured according to the above-mentioned standards or measurement methods. The number of rows shown in the "Quantity" column in Tables 1 and 2 indicates the number of rows in the width direction, with two rolls of toilet rolls arranged in the axial direction being considered as one row.

[0070] (Packaging tightness / Damage to rolls) The evaluation of "packaging tightness and roll damage" was conducted by 20 monitors through a sensory evaluation method in which the tightness of the packaging, damage to the roll, etc. were evaluated by selecting "good" or "bad". The evaluation was based on the following criteria. ◎: 18 or more people answered "Good" ○: 14 to 17 people answered "Good" △: 10 to 13 people answered "Good" ×: 9 or fewer people answered "Good"

[0071] (Water absorption) The "water absorption" was evaluated by evaluating the water absorption rate using the method described above, and was evaluated according to the following criteria. ◎: 2.0 seconds or less ○: Slower than 2.0 seconds and 2.5 seconds or less △: Slower than 2.5 seconds and 3.0 seconds or less ×: Slower than 3.0 seconds

[0072] (Roll softness) The evaluation of "softness of the roll" was a sensory evaluation by 20 monitors, who selected "soft" or "hard" for the softness of the toilet roll. The evaluation was based on the following criteria. ◎: More than 18 people say "soft" ○: "Soft" is between 14 and 17 people △: 10 to 13 people say "soft" ×: 9 or fewer people think it's "soft"

[0073] The results obtained are shown in Tables 1 and 2.

[0074] [Table 1]

[0075] [Table 2]

[0076] As seen from Tables 1 and 2, according to the present disclosure, even when two toilet rolls arranged in one row in the axial direction are packaged in three to five rows in the width direction, the toilet rolls can be packaged tightly and damage and deformation to the toilet rolls can be prevented while maintaining their water absorbency. [Explanation of symbols]

[0077] 10: Toilet roll packaging 20, 20A, 20B: Toilet roll 20a:Toilet paper 30: Exterior film

Claims

1. A toilet roll package in which toilet rolls are formed by winding up toilet paper in a roll shape in which two or more double-embossed plies are layered, and the toilet rolls are arranged in a number of rows in the width direction, each row consisting of two rolls arranged in the axial direction, and packaged in an exterior film, The number of rows of the toilet rolls arranged in the width direction is 3 to 5, The roll softness of the toilet roll is 2.5 mm or more and 5.0 mm or less, The winding density of the toilet roll is 0.6 m / cm ２ 0.8m / cm or more ２ is as follows: The roll diameter of the toilet roll is 118 mm or more and 140 mm or less, The toilet paper has a paper thickness of 1.1 mm / 10 ply or more and 1.9 mm / 10 ply or less, The HF value of the toilet paper product PLY according to the TSA is 85 or more and 100 or less; The water absorption rate of the toilet paper product PLY measured in accordance with the former JIS S 3104 is 3 seconds / 0.1 ml or less; When a ruler having a mass of 10 g, a thickness of 0.5 mm, and a width of 15 mm is placed on the exterior film wrapped across two adjacent rows of toilet rolls, the amount of sagging of the exterior film is 3 mm or more and 12 mm or less; The value represented by the formula: (amount of sagging of the exterior film) / (roll softness of the toilet roll) is 0.3 or more and 4.0 or less, The value represented by the formula: (amount of sagging of the exterior film) / (winding density of the toilet roll) is 2 or more and 19 or less. A toilet roll packaging body characterized by:

2. The basis weight of the toilet paper product PLY is 30 g / m ２ 50g / m or more ２ is less than or equal to 2. The toilet roll packaging of claim 1.

3. The specific volume of the toilet paper is 6 cm ３ / g or more 9cm ３ / g or less The toilet roll packaging according to claim 1 or 2.

4. The roll length of the toilet roll is 34 m or more and 57 m or less. The toilet roll packaging according to claim 1 or 2.

5. The roll mass of the toilet roll per 114 mm width is 155 g or more and 275 g or less. The toilet roll packaging according to claim 1 or 2.

6. The roll density of the toilet roll is 0.08 g / cm ３ 0.18g / cm or more ３ is less than or equal to The toilet roll packaging according to claim 1 or 2.

7. The toilet paper product PLY has a tensile strength DMDT in the MD direction when dry based on JIS P 8113 of 2.0 N / 25 mm or more and 5.5 N / 25 mm or less. The toilet roll packaging according to claim 1 or 2.

8. The tensile strength (DCDT) in the CD direction when dry based on JIS P 8113 of the toilet paper product PLY is 0.6 N / 25 mm or more and 1.6 N / 25 mm or less. The toilet roll packaging according to claim 1 or 2.

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