Paper towel packaging

Abstract

This paper towel packaging provides a tightly fitting packaging solution that maintains the softness and absorbency of the sheets and rolls while suppressing deformation of the paper towel rolls. [Solution] This disclosure relates to a paper towel packaging package 10, wherein the paper towel packaging 20 is a packaging in which two rolls of paper towels 40 are arranged linearly in a first direction and wrapped with a second outer film 50, and two or three rolls are arranged in the first direction and three or four rolls are arranged in the second direction and wrapped with a first outer film 30, the first outer film 30 has a seal portion 30a on both sides in a predetermined direction, and the winding density is 0.15 m / cm 2 More than 0.60m / cm 2 The following conditions apply: the winding flexibility is between 1.2 mm and 4.0 mm; the drop from the top surface of the base is between 10 mm and 45 mm; and the water absorption per unit area is 280 g / m². 2 More than 570g / m 2 The following applies:

Description

Technical Field

[0001] The present disclosure relates to a paper towel wrapper package.

Background Art

[0002] There is a package in which a plurality of roll products are collectively packaged with an outer film.

[0003] For example, Patent Document 1 discloses a toilet roll package in which 10 toilet rolls are gusset-packaged with an outer film. Also, Patent Document 2 discloses a toilet roll package in which 2 toilet rolls are packaged with a film.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, there is a trend towards longer paper towel rolls. Paper towel rolls that prioritize quality, have high absorbency, and are bulky have a lower winding density and are looser than longer rolls. With such high-quality, absorbent, bulky, and loosely wound paper towel rolls, it is possible to obtain a tight paper towel package by film-wrapping two rolls together. However, if multiple such paper towel packages are bundled together and further film-wrapped from the outside, the paper towel packages tend to move around inside the package, making it difficult to maintain the tightness of the paper towel package. Furthermore, if the paper towel packages move inside the package, they may come into contact with each other or with each other, potentially causing the paper towel rolls to deform. On the other hand, if the paper towel package needs to be tightly wrapped to ensure a tight fit, the paper towel rolls inside may be crushed, the embossing may be damaged, or the paper thickness may be reduced, potentially compromising quality.

[0006] Therefore, the present disclosure aims to provide a paper towel packaging that allows for tight packaging even when 6 to 12 two-roll paper towel packages are film-wrapped together, while maintaining the softness and absorbency of the sheets and rolls, and suppressing deformation of the paper towel rolls. [Means for solving the problem]

[0007] To solve the above problems, a first aspect of the present invention is a paper towel packaging package in which a plurality of paper towel packaging bodies containing two rolls each are wrapped in a first outer film, wherein the paper towel packaging body is a packaging body in which two rolls of paper towel rolls, which are wound into a roll shape, are arranged in a straight line in a first direction intersecting the axial direction and wrapped in a second outer film, and two or three rolls are arranged in the first direction and three or four rolls are arranged in a second direction intersecting both the axial direction and the first direction and wrapped in the first outer film, the first outer film has sealing portions on both sides in a predetermined direction, and the winding density of the paper towel rolls is 0.15 m / cm 2More than 0.60m / cm 2 The following conditions apply: the softness of the paper towel roll is 1.2 mm or more and 4.0 mm or less; when the paper towel packaging is placed on a table, all the paper towel packaging is moved to one side in the predetermined direction, and the paper towel packaging located on the far side in the predetermined direction is dropped outside the edge of the table, the drop from the top surface of the table is 10 mm or more and 45 mm or less; and the water absorption capacity per unit area of ​​the paper towel is 280 g / m². 2 More than 570g / m 2 The following applies:

[0008] A second aspect of the present invention is a paper towel packaging according to the first aspect, wherein the winding diameter of the paper towel roll is 125 mm or more and 175 mm or less.

[0009] A third aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the basis weight of the product ply of the paper towel is 33 g / m². 2 More than 65g / m 2 The following applies:

[0010] A fourth aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the paper thickness of the paper towel is 0.4 mm / product ply or more and 1.0 mm / product ply or less.

[0011] A fifth aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the water absorption per unit mass of the paper towel is 3.0 g / g or more and 12.0 g / g or less.

[0012] A sixth aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the length of the paper towel roll is 20m or more and 50m or less.

[0013] A seventh aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the paper towel has an embossed surface, and the embossed surface area ratio is 8% or more and 20% or less.

[0014] An eighth aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the roll weight excluding the core per 280 mm width of the paper towel roll is 190 g or more and 620 g or less.

[0015] A ninth aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the roll density of the paper towel roll is 0.03 g / cm³. 3 More than 0.20g / cm 3 The following applies:

[0016] A tenth aspect of the present invention is a paper towel packaging package according to the first or second aspect, wherein the paper towel packaging is arranged in a first outer film, with two or three in the first direction and three in the second direction, with the first direction being the predetermined direction, and the circumference A of the plurality of paper towel packaging in the arranged state before being packaged with the first outer film is 1300 mm or more and 1700 mm or less, with the predetermined direction as the axis.

[0017] An eleventh aspect of the present invention is a paper towel packaging package according to the tenth aspect, wherein the circumference B of the first outer film of the paper towel packaging package, when the predetermined direction is used as the axis, is 1260 mm or more and 2000 mm or less.

[0018] The twelfth aspect of the present invention is the paper towel package of the first aspect or the second aspect, wherein the value (%) represented by: (circumference B (mm) of the first outer film of the paper towel package package around the predetermined direction) / (circumference A (mm) of the plurality of paper towel packages in the arranged state before being wrapped with the first outer film around the predetermined direction) × 100 is 97% or more and 115% or less.

[0019] The thirteenth aspect of the present invention is the paper towel package of the first aspect or the second aspect, wherein the value represented by: { (circumference B (mm) of the first outer film of the paper towel package package around the predetermined direction) / (circumference A (mm) of the second outer film of the plurality of paper towel packages in the arranged state before being wrapped with the first outer film around the predetermined direction) × 100} / (winding softness (mm) of the paper towel roll) is 20 or more and 80 or less.

[0020] The fourteenth aspect of the present invention is the paper towel package of the first aspect or the second aspect, wherein the value represented by: { (circumference B (mm) of the first outer film of the paper towel package package around the predetermined direction) / (circumference A (mm) of the second outer film of the plurality of paper towel packages in the arranged state before being wrapped with the first outer film around the predetermined direction) × 100} / (winding density (m / cm 2 )) is 180 or more and 450 or less.

[0021] The fifteenth aspect of the present invention is the paper towel package of the first aspect or the second aspect, wherein the tensile strength DMDT in the MD direction during drying based on JIS P 8113 in the product ply of the paper towel is from 6.0 N / 25 mm to 14.0 N / 25 mm.

[0022] A sixteenth aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the tensile strength DCDT in the CD direction of the product ply of the paper towel when dry, according to JIS P 8113, is 6.0 N / 25 mm or more and 14.0 N / 25 mm or less.

[0023] A 17th aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the paper towel roll has a cylindrical core in the center, and the apparent basis weight of the core is 200 g / m². 2 More than 500g / m 2 The following applies:

[0024] An eighteenth aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the paper towel roll has a cylindrical core in the center, and the outer diameter of the core is 28 mm or more and 58 mm or less.

[0025] A 19th aspect of the present invention is a paper towel packaging according to the first or second aspect, wherein the paper towel roll has a cylindrical core in the center, and the core comprises LBKP (bleached hardwood kraft pulp). [Effects of the Invention]

[0026] According to this disclosure, even when wrapping 6 to 12 two-roll paper towel packages together in film, it is possible to provide a paper towel packaging that can be tightly packaged, maintaining the softness and absorbency of the sheets and rolls while suppressing deformation of the paper towel rolls. [Brief explanation of the drawing]

[0027] [Figure 1] This is a perspective view of a paper towel packaging according to one embodiment of the present invention. [Figure 2] This is an explanatory diagram showing a modified example of a paper towel packaging. [Figure 3]A perspective view of a paper towel package. [Figure 4] A perspective view of a paper towel roll. [Figure 5] This diagram shows a method for measuring the water absorption capacity of paper towels. [Figure 6] This figure shows an example of an embossed pattern on a paper towel. [Figure 7] This is an explanatory diagram showing how to measure the drop from the top surface of a table. [Modes for carrying out the invention]

[0028] The following describes in detail one embodiment of the present invention, but the following embodiments are presented for illustrative purposes only, and the present invention is not limited in any way to the embodiments shown below. The axial direction means the direction along the axis of the paper towel roll, and is the X direction in the figure. The first direction means the direction that intersects (is perpendicular to) the axial direction, and is the direction in which the paper towel rolls are arranged within the paper towel packaging, and is the Y direction in the figure. The second direction means the thickness direction of the paper towel packaging, and is the direction that intersects (is perpendicular to) both the axial direction and the first direction, and is the Z direction in the figure. The V direction, indicated by the white double arrow in the figure, is the direction in which the first outer film extends in a cylindrical shape when packaging with the first outer film (a predetermined direction). In the following description, the axial direction of the paper towel roll may also be referred to as the X direction, the first direction as the Y direction, the second direction as the Z direction, and the predetermined direction as the V direction.

[0029] Figure 1 is a perspective view of a paper towel packaging according to one embodiment of the present invention. Figure 2 is an explanatory diagram showing a modified example of the paper towel packaging. Figure 3 is a perspective view of the paper towel packaging. Figure 4 is a perspective view of a paper towel roll. Figure 5 is a diagram showing a method for measuring the water absorption capacity of a paper towel. Figure 6 is a diagram showing an example of an embossed pattern on a paper towel. Figure 7 is an explanatory diagram showing a method for measuring the drop from the top surface of a table.

[0030] <Paper towel packaging> As shown in Figure 1, the paper towel packaging package 10 according to this embodiment is made by bundling multiple (six in Figure 1) paper towel packaging units 20, each containing two rolls, together with a first outer film 30. In the paper towel packaging package 10, multiple paper towel packaging units 20 are wrapped in the first outer film 30. As shown in Figure 3, the paper towel packaging unit 20 is made by bundling two rolls of paper towel 40 together with a second outer film 50.

[0031] In the paper towel packaging package 10 according to this embodiment, as described later, the winding density of the paper towel roll 40, the winding softness of the paper towel roll 40, the drop of the paper towel packaging 20 of the paper towel packaging package 10 from the top surface of the base, and the amount of water absorbed per unit area of ​​the paper towel are appropriately set. As a result, according to this embodiment, even when 6 to 12 paper towel packaging units 20 containing 2 rolls are film-wrapped together, the packaging can be done tightly, and a paper towel packaging package 10 can be provided that suppresses deformation of the paper towel roll 40 while maintaining the softness and water absorbency of the sheets and rolls.

[0032] Details of each configuration are as follows:

[0033] (How to arrange toilet roll packaging) As shown in Figures 1 and 2, in the paper towel packaging package 10, the paper towel packages 20 are arranged in one row in the X direction, with two or three in the first direction (Y direction) and three or four in the second direction (Z direction), and then wrapped with a first outer film 30. For example, Figure 1 shows a state in which a total of six paper towel packages 20, arranged two in the Y direction and three in the Z direction, are wrapped with the first outer film 30. Also, Figure 2(a) shows a state in which a total of nine paper towel packages 20, arranged three in the Y direction and three in the Z direction, are wrapped with the first outer film 30. Also, Figure 2(b) shows a state in which a total of twelve paper towel packages 20, arranged three in the Y direction and four in the Z direction, are wrapped with the first outer film 30. Furthermore, Figures 2(c) and (d) illustrate a state in which a total of eight paper towel packages 20, arranged two in the Y direction and four in the Z direction, are wrapped in the first outer film 30. Note that in the paper towel package 10 shown in Figures 2(c) and (d), the direction in which the sealing portion 30a of the first outer film 30, described later, is provided (a predetermined direction) is different from the direction in which the paper towel packages 20 are oriented.

[0034] (Number of toilet roll packages) The number of paper towel packages 20 wrapped in the first outer film 30 (hereinafter referred to as "package size") is between 6 and 12. If the pack size of the paper towel packages 20 is less than 6 (5 or less), the number is too small, resulting in excessive packaging. On the other hand, if the pack size of the paper towel packages 20 is more than 12 (13 or more), the number of paper towel rolls 40 that come into contact with each other increases, making the paper towel rolls 40 more prone to being crushed and deformed. The upper limit of the pack size of the paper towel packages 20 is preferably 10 or less, more preferably 8 or less, and even more preferably 6 or less.

[0035] (Pack weight) The weight of the paper towel packaging package 10 (hereinafter sometimes referred to as "pack weight") is preferably between 1.7 kg and 7.7 kg. If the pack weight is lighter than 1.7 kg, the tightness will be poor. On the other hand, if the pack weight is heavier than 7.7 kg, the paper towel roll 40 will be more prone to crushing and deformation. The lower limit of the above range for pack weight is more preferably 2.5 kg or more, and even more preferably 3.0 kg or more. The upper limit of the above range for pack weight is more preferably 7.2 kg or less, and even more preferably 6.5 kg or less.

[0036] <First exterior film> As shown in Figure 1, the first outer film 30 is a resin film that wraps multiple paper towel packages 20. The first outer film 30 covers multiple paper towel packages 20, which are arranged in groups of two or three in the Y direction and three or four in the Z direction, from all directions.

[0037] Examples of resin films used for the first outer packaging film 30 include LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), HDPE (high-density polyethylene), CPP (unoriented polypropylene), or films made by blending or mixing these materials. Alternatively, these films may be laminated, coated, or multilayered with other materials. Examples of the other materials include OPP (oriented polypropylene), EVOH (ethylene vinyl alcohol copolymer), Ny (nylon), PET (polyethylene terephthalate), and PVDC (polyvinylidene chloride). Among these, LLDPE, LDPE, or a mixture thereof is preferred for the resin film used for the first outer packaging film 30. By using LLDPE, LDPE, or a mixture thereof for the resin film used for the first outer packaging film 30, it is possible to package multiple 2-roll paper towel packages 20 tightly and prevent deformation of the paper towel rolls 40.

[0038] The packaging of the multiple paper towel packages 20 with the first outer film 30 is preferably in pillow packaging.

[0039] Pillow packaging is well known. For example, with multiple paper towel packages 20 placed on (or below) a sheet-like first outer film 30, the first outer film 30 is wrapped around the multiple paper towel packages 20 in a cylindrical shape, and the overlapping portions of both ends of the first outer film 30 are bonded (heat-sealed, etc.) to the outer surface of the inner film and the inner surface of the outer film (not shown). At this time, the first outer film 30 is wrapped so that it becomes a cylindrical shape extending in a predetermined direction (V direction). The openings on both sides of the first outer film 30 in the V direction are gusseted and sealed horizontally in a direction intersecting the axial direction (X direction) by heat-sealing, etc., and each package is cut at this sealed portion. In other words, the first outer film 30 of the paper towel package 10 has sealed portions 30a on both sides in the predetermined direction (V direction).

[0040] <Paper towel packaging> As shown in Figure 3, the paper towel packaging 20 is made by arranging paper towel rolls 40 in one row in the axial direction (X direction) and two rolls in a straight line in the Y direction intersecting the axial direction, and then packaging them with a second outer film 50. Each paper towel roll 40 is arranged in a straight line in the Y direction with its axis parallel to the other, and its outer surfaces are in contact with each other.

[0041] <Second exterior film> The second outer packaging film 50 is a resin film that packages two paper towel rolls 40 together as one. The second outer packaging film 50 covers the two paper towel rolls 40, which are arranged in a straight line in the Y direction, from all directions.

[0042] Examples of resin films used for the second outer packaging film 50 include LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), HDPE (high-density polyethylene), CPP (unoriented polypropylene), or films made by blending or mixing these materials. Alternatively, these films may be laminated, coated, or multilayered with other materials. Examples of the other materials include OPP (oriented polypropylene), EVOH (ethylene vinyl alcohol copolymer), Ny (nylon), PET (polyethylene terephthalate), and PVDC (polyvinylidene chloride). Among these, LLDPE, LDPE, or a mixture thereof is preferred for the resin film used for the second outer packaging film 50. By using LLDPE, LDPE, or a mixture thereof for the resin film used for the second outer packaging film 50, it is possible to package two rolls of highly absorbent, soft paper towel rolls 40 tightly and in a way that prevents deformation of the paper towel rolls 40.

[0043] The packaging of the two paper towel rolls 40 with the second outer film 50 is preferably caramel-wrapped. Caramel-wrapped packaging makes it easier to maintain the tightness of the packaging.

[0044] Caramel packaging is well known. For example, two paper towel rolls 40 are placed side by side on a sheet-like second outer film 50, and the second outer film 50 is wrapped around the circumferential surface of the two paper towel rolls 40 to form a cylindrical shape (a cylindrical shape extending in the axial direction). Alternatively, two paper towel rolls 40 are raised from below the set sheet-like second outer film 50, with their axial directions parallel to each other, up to the sheet surface (bottom side) of the second outer film 50. In this state, the second outer film 50 is wrapped around the circumferential surface of the paper towel rolls 40 to form a cylindrical shape, and the overlapping portions of both ends of the second outer film 50 on the circumferential surface of the paper towel rolls 40 are heat-sealed (not shown) along the axial direction of the paper towel rolls 40. Then, of the second outer film 50 that protrudes from both axial ends of the two paper towel rolls 40, two opposing flap-shaped edges are folded together, and then two other opposing flap-shaped edges are folded together in the same way, and these folded portions are sealed by heat sealing or the like. In this way, the axial end faces of each row of the caramel-wrapped paper towel rolls 40 are located substantially on the same plane as each other in each row, and face the second outer film 50 on the top surface 20a and the second outer film 50 on the bottom surface 20b of the paper towel packaging 20.

[0045] <Paper towel roll> As shown in Figure 4, the paper towel roll 40 is made by winding paper towels 40a into a roll shape and has a core 41 in the center, such as a cylindrical paper tube or a cylindrical space. Preferably, the paper towels 40a are provided with perforations or other easy-tear sections (not shown) at predetermined intervals so that they can be cut to a predetermined length.

[0046] (core) The core 41 is located in the center of the paper towel roll 40. The core 41 may be a cylindrical paper tube or a cylindrical space. In this embodiment, the core 41 of the paper towel roll 40 has a cylindrical paper tube made of multiple sheets of base paper stacked together, and the paper towels 40a are wound around this paper tube. In the following description, unless otherwise specified, the core 41 refers to the core 41 which is a cylindrical paper tube.

[0047] The core 41 preferably contains LBKP (bleached hardwood kraft pulp) as pulp fibers contained in the base paper. In other words, the core 41 preferably contains LBKP. The LBKP content is preferably 50% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more. Including LBKP in the core 41 gives the product a premium feel.

[0048] (Core outer diameter) The outer diameter DI of the core 41 (hereinafter referred to as "core outer diameter DI") is preferably 28 mm or more and 58 mm or less. If the core outer diameter DI is smaller than 28 mm, the winding diameter (outer diameter) DR (hereinafter sometimes simply referred to as "winding diameter DR") of the paper towel roll 40 becomes too small, resulting in poor tightness. On the other hand, if the core outer diameter DI is larger than 58 mm, the winding diameter DR of the paper towel roll 40 becomes too large. The lower limit of the above range for the core outer diameter DI is more preferably 32 mm or more, and even more preferably 36 mm or more. The upper limit of the above range for the core outer diameter DI is more preferably 52 mm or less, and even more preferably 48 mm or less.

[0049] The core outer diameter DI is measured using, for example, a Diameter Rule manufactured by Muratec KDS Corporation. The measurement is performed by measuring four paper towel rolls 40 and averaging the results. In the case of a paper towel roll 40 in which the core 41 is a cylindrical space rather than a paper tube, the diameter of the cylindrical space (central hole) at the center of the paper towel roll 40 is considered to be the core outer diameter DI.

[0050] (Core weight) The weight of the core 41 (hereinafter referred to as "core weight") is preferably between 7g and 22g. If the core weight is less than 7g, the diameter of the core 41 becomes smaller, and the winding diameter DR of the paper towel roll 40 becomes too small, resulting in poor tightness. On the other hand, if the core weight is greater than 22g, the diameter of the core 41 becomes larger, and the winding diameter DR of the paper towel roll 40 becomes too large, causing the paper towel roll 40 to collapse and deform. The lower limit of the above range for core weight is more preferably 9g or more, and even more preferably 11g or more. The upper limit of the above range for core weight is more preferably 19g or less, and even more preferably 17g or less. The core weight is the weight per 280mm of roll width W. If the roll width W is not 280mm, it is converted to the weight per 280mm by proportional calculation. The roll width W refers to the axial length of the paper towel roll 40.

[0051] (Apparent basis weight of the core) The apparent basis weight of Core 41 (the basis weight of the core made up of multiple sheets of base paper stacked together) is 200 g / m². 2 More than 500g / m 2 Preferably, the apparent basis weight of the core 41 is 200 g / m². 2 If made smaller than that, or 500g / m 2 Making it larger than this would make it difficult to use. In other words, by setting the apparent basis weight of the core 41 within the above range, the core 41 becomes appropriately firm, is less likely to be crushed, and is easier to fold (crush) when disposing of the core 41 after using the paper towel roll 40, resulting in superior ease of use for the roll product. The lower limit of the apparent basis weight of the core 41 within the above range is 280 g / m². 2 It is more preferable that the amount be greater than or equal to 350 g / m². 2 It is even more preferable that the above is true. Furthermore, the upper limit of the above range for the apparent basis weight of core 41 is 480 g / m². 2 It is more preferable that the following conditions apply: 450 g / m² 2 The following is even more preferable: The apparent basis weight of core 41 is measured in accordance with JIS P 8124.

[0052] (winding diameter) The winding diameter DR of the paper towel roll 40 is preferably between 125 mm and 175 mm. If the winding diameter DR is smaller than 125 mm, it becomes too small and the tightness is poor. On the other hand, if the winding diameter DR is larger than 175 mm, it becomes too large and too tight, which may cause the paper towel roll 40 to be crushed or damaged. The lower limit of the winding diameter DR within the above range is more preferably 135 mm or more, and even more preferably 145 mm or more. The upper limit of the winding diameter DR within the above range is more preferably 170 mm or less, and even more preferably 165 mm or less.

[0053] (Length of volume) The length of the paper towel roll 40 (hereinafter sometimes simply referred to as "length") is preferably 20m or more and 50m or less. If the length is shorter than 20m, the winding diameter DR becomes too small, resulting in poor tightness. On the other hand, if the length is longer than 50m, the winding diameter DR becomes too large, resulting in excessive tightness, which may cause the paper towel roll 40 to be crushed or damaged. The lower limit of the length within the above range is more preferably 23m or more, and even more preferably 25m or more. The upper limit of the length within the above range is more preferably 47m or less, and even more preferably 43m or less.

[0054] (Roll width) The roll width W of the paper towel roll 40 is preferably between 200 mm and 400 mm. If the roll width W is less than 200 mm, the tightness will be poor. On the other hand, if the roll width W is greater than 400 mm, it will be too tight, and the paper towel roll 40 may be crushed or damaged. The lower limit of the roll width W within the above range is more preferably 230 mm or more, and even more preferably 250 mm or more. The upper limit of the roll width W within the above range is more preferably 350 mm or less, and even more preferably 300 mm or less.

[0055] (winding density) The winding density of the 40-count paper towel roll (hereinafter sometimes simply referred to as "winding density") is 0.15 m / cm². 2 More than 0.60m / cm 2 The following applies: Winding density is 0.15 m / cm². 2 If the density is made smaller (lower), the paper towel roll 40 becomes too soft and easily deformed. On the other hand, if the winding density is 0.60 m / cm², 2 If the density is increased beyond this (higher), the 40mm paper towel roll becomes too stiff and loses its softness. The lower limit of the above range for winding density is 0.25 m / cm². 2 Preferably, it should be 0.29 m / cm 2 It is more preferable that the above values ​​are met. Furthermore, the upper limit of the above range for winding density is 0.50 m / cm². 2 Preferably, it is 0.40 m / cm 2 The following is more preferable:

[0056] The winding density is expressed by the following formula (1). Winding density = (winding length × number of plies) ÷ (cross-sectional area of ​​a 40-ply paper towel roll) ... (1) The cross-sectional area of ​​the paper towel roll 40 is expressed by the following formula (2). Cross-sectional area of ​​paper towel roll 40 = (Cross-sectional area of ​​the winding diameter portion DR of paper towel roll 40) - (Cross-sectional area of ​​the core outer diameter portion DI) ... (2) For example, if the winding length is 20m, the wire is 2-ply, the winding diameter (DR) is 154mm, and the core outer diameter (DI) is 44mm, the winding density = (20m × 2) ÷ {3.14 × (154mm ÷ 2 ÷ 10)} 2 -3.14 × (44mm ÷ 2 ÷ 10) 2} = 0.23 m / cm 2 This is the result.

[0057] (Softness of winding) When evaluating the softness of the paper towel roll 40, the softness when holding the paper towel roll 40 can be evaluated by assessing the "winding softness" described below.

[0058] The winding flexibility of the paper towel roll 40 (hereinafter sometimes simply referred to as "winding flexibility") is measured using a compression tester (KES-G5 handy compression tester manufactured by Kato Tech Co., Ltd.) as follows. The direction parallel to the axial direction of the paper towel roll 40 is defined as the height direction, and the direction perpendicular to the tangent to the circumference of the paper towel roll 40 is defined as the radial direction.

[0059] First, place the paper towel roll 40 horizontally on the test machine stand so that its axis is horizontal. Then, place the KES-G5 compressor (contact area 2.0 cm²) at the center of the paper towel roll 40 in the axial direction. 2 The roller is pushed in from above in the radial direction at a speed of 10 mm / min. The pressure the compressor exerts on the roll is 5 gf / cm². 2 The indentation depth at that time is T0, and the pressure is 150 gf / cm². 2 Let Tm be the depth of indentation at this time, and (Tm-T0) is measured as the "winding softness". Next, the paper towel roll 40 is rotated 90 degrees in the circumferential direction with its axis as the axis of rotation, and the indentation depth Tm and T0 are measured in the same way as above, and the difference between Tm and T0 (Tm-T0) is calculated. The measurement is performed twice (at two angles) as described above for the four paper towel rolls 40 taken from the two paper towel packaging bodies 20. That is, each of the four paper towel rolls 40 is measured twice, and the average of the measurement results for a total of eight times (= 2 times / roll × 4 rolls) is taken as the final winding softness.

[0060] The roll flexibility of the paper towel roll 40 is between 1.2 mm and 4.0 mm. If the roll flexibility of the paper towel roll 40 is less than 1.2 mm, it becomes too hard and lacks softness. On the other hand, if the roll flexibility of the paper towel roll 40 is greater than 4.0 mm, it becomes too soft and the paper towel roll 40 becomes easily deformed. The lower limit of the above range for roll flexibility is preferably 1.4 mm or more, and more preferably 1.6 mm or more. The upper limit of the above range for roll flexibility is preferably 3.6 mm or less, and more preferably 3.2 mm or less.

[0061] (Roll weight) The roll weight of the paper towel roll 40, including the core (paper tube) 41, per roll width W280mm (hereinafter sometimes simply referred to as "roll weight <with core>") is preferably 200g or more and 630g or less. If the roll weight <with core> is less than 200g, the winding diameter DR becomes too small, resulting in poor tightness. On the other hand, if the roll weight <with core> is greater than 630g, the winding diameter DR becomes too large, resulting in excessive tightness, which may cause the paper towel roll 40 to be crushed or damaged. The lower limit of the above range for the roll weight <with core> is more preferably 250g or more, and even more preferably 300g or more. The upper limit of the above range for the roll weight <with core> is more preferably 580g or less, and even more preferably 420g or less.

[0062] The roll weight of the paper towel roll 40, excluding the core 41 (which is a paper tube), per roll width W280mm (hereinafter sometimes simply referred to as "roll weight <core-less>") is preferably between 190g and 620g. If the roll weight <core-less> is less than 190g, the winding diameter DR becomes too small, resulting in poor tightness. On the other hand, if the roll weight <core-less> is greater than 620g, the winding diameter DR becomes too large, resulting in excessive tightness, which may cause the paper towel roll 40 to be crushed or damaged. The lower limit of the above range for the roll weight <core-less> is more preferably 240g or more, and even more preferably 290g or more. The upper limit of the above range for the roll weight <core-less> is more preferably 570g or less, and even more preferably 410g or less.

[0063] (Roll density) The roll density of Paper Towel Roll 40 (hereinafter sometimes simply referred to as "roll density") is 0.03 g / cm³. 3 More than 0.20g / cm 3 Preferably, the roll density is 0.03 g / cm³. 3Making it smaller than that would make the 40-gram paper towel roll too soft and prone to deformation. On the other hand, if the roll density is 0.20 g / cm³, 3 If the density is increased beyond this, the 40mm paper towel roll becomes too stiff and lacks softness. The lower limit of the roll density within the above range is 0.04 g / cm³. 3 It is more preferable that the concentration be greater than or equal to 0.05 g / cm³. 3 It is even more preferable that the above conditions are met. Furthermore, the upper limit of the above range for roll density is 0.15 g / cm³. 3 It is more preferable that the following is the case: 0.10 g / cm³ 3 The following is even more preferable:

[0064] The roll density of paper towel roll 40 is expressed as (roll weight of paper towel roll 40 <without core>) ÷ (volume of paper towel roll 40) and can be calculated from the following formula (3). Roll density = Roll weight ÷ [{(Cross-sectional area of ​​the outer diameter portion of the 40mm paper towel roll) - (Cross-sectional area of ​​the outer diameter portion of the core)} × Roll width W (converted based on 280mm)]...(3) For example, if the roll weight (without core) per roll width W280mm is 237g, the winding diameter (DR) is 154mm, and the core outer diameter (DI) is 44mm, then the roll density = 237g ÷ {(3.14 × (154mm ÷ 2 ÷ 10)} 2 -3.14 × (44mm ÷ 2 ÷ 10) 2 ) × (280 mm ÷ 10) = 0.05 g / cm 3 This is the result.

[0065] <Paper towels> The paper towel 40a is preferably a sheet made of two or more layers with an embossed surface. The number of plies of the paper towel 40a is more preferably two or more and three or less, and even more preferably two.

[0066] (paper thickness) The paper thickness per product ply of paper towel 40a (hereinafter simply referred to as "paper thickness per product ply") is preferably 0.40 mm / product ply or more and 1.00 mm / product ply or less. If the paper thickness per product ply is less than 0.40 mm / product ply, the water absorption will be poor. On the other hand, if the paper thickness per product ply is greater than 1.00 mm / product ply, the softness of the roll will become stiff. The lower limit of the above range for paper thickness per product ply is more preferably 0.50 mm / product ply or more, and even more preferably 0.56 mm / product ply or more. The upper limit of the above range for paper thickness per product ply is more preferably 0.90 mm / product ply or less, and even more preferably 0.84 mm / product ply or less.

[0067] The paper thickness per 10 plies of paper towel 40a (hereinafter simply referred to as "paper thickness per 10 plies") is preferably 2.0 mm / 10 plies or more and 5.0 mm / 10 plies or less. If the paper thickness per 10 plies is less than 2.0 mm / 10 plies, the water absorption will be poor. On the other hand, if the paper thickness per 10 plies is greater than 5.0 mm / 10 plies, the roll will become stiff. The lower limit of the above range for paper thickness per 10 plies is more preferably 2.5 mm / 10 plies or more, and even more preferably 2.8 mm / 10 plies or more. The upper limit of the above range for paper thickness per 10 plies is more preferably 4.5 mm / 10 plies or less, and even more preferably 4.2 mm / 10 plies or less.

[0068] The paper thickness of paper towel 40a shall be the value measured by the following method. The apparatus used is a thickness gauge (Ozaki Seisakusho's dial thickness gauge "PEACOCK"). The measurement conditions are a measuring load of 3.7kPa and a probe diameter of 30mm. The sample is placed between the probe and the measuring stand, and the gauge is read when the probe is lowered at a speed of 1mm or less per second. When measuring the paper thickness per 10 plies, 10 plies (5 sets of 2-ply sheets) are stacked and measured, and the measurement is repeated 10 times to average the measurement results. In the case of a 3-ply sheet, 9 plies (3 sets of 3-ply sheets) are stacked and measured, and the paper thickness per ply is calculated from the measurement results and converted to 10 plies. When measuring the paper thickness per product ply, the paper thickness per product ply is converted from the measurement result of the paper thickness per 10 plies. The paper thickness is measured at 10 points: 5 distinct points along the MD direction (conveying direction) of the sheet, and 5 points shifted from these 5 points along the CD direction (width direction). It is important to measure the paper thickness at 10 distinct points; precise location is not required.

[0069] (Basic weight) The basis weight of the 40a paper towel product ply is 33 g / m², measured according to JIS P 8124. 2 More than 65g / m 2 The following is preferable: The basis weight of the product ply of the paper towel 40a is 33 g / m². 2 Making it smaller results in poor water absorption. On the other hand, the basis weight of a 40a paper towel product is 65 g / m². 2 If the size is increased beyond this, the roll density will increase, and the softness of the roll will become stiffer. The lower limit of the above range for the basis weight of the 40a paper towel product ply is 38 g / m². 2 It is more preferable that the amount be greater than or equal to 40 g / m 2 It is even more preferable that the above conditions are met. Furthermore, the upper limit of the above range for the basis weight of the product ply of paper towel 40a is 60 g / m². 2 It is more preferable that the following conditions apply: 55 g / m 2 The following is even more preferable:

[0070] (specific volume) The specific volume (product ply) of a 40a paper towel is 12 cm³. 3 / g or more 18cm 3 It is preferable that the specific volume of paper towel 40a is 12 cm³ or less. 3 If the amount is less than / g, the absorbency will be reduced. On the other hand, the specific volume of a 40a paper towel is 18cm³. 3 If the value is greater than / g, the softness of the roll will become firmer. The specific volume of paper towel 40a is calculated by dividing the paper thickness of the product ply of paper towel 40a by the basis weight of the product ply, and then calculating the volume per gram (cm³). 3 This is expressed as follows. Note that the lower limit of the above range for the specific volume of paper towel 40a is 13 cm 3 It is more preferable that it be 14cm or more per g. 3 It is even more preferable that the specific volume is 17 cm² or more. 3 It is more preferable that it be less than or equal to / g, 16cm 3 It is even more preferable that the amount be less than or equal to / g.

[0071] (Tensile strength DMDT) The dry tensile strength (DMDT) in the Machine Direction (MD) of the product ply of paper towel 40a, based on JIS P 8113, is preferably 6.0 N / 25 mm or more and 14.0 N / 25 mm or less. The lower limit of the above range for tensile strength DMDT is more preferably 8.0 N / 25 mm or more, and even more preferably 9.0 N / 25 mm or more. The upper limit of the above range for tensile strength DMDT is more preferably 13.0 N / 25 mm or less, and even more preferably 12.0 N / 25 mm or less.

[0072] (Tensile strength DCDT) The tensile strength DCDT in the cross-direction (CD) direction when dry, based on JIS P 8113, for product plies of paper towel 40a is preferably 6.0 N / 25 mm or more and 14.0 N / 25 mm or less. The lower limit of the above range for tensile strength DCDT is more preferably 8.0 N / 25 mm or more, and even more preferably 9.0 N / 25 mm or more. The upper limit of the above range for tensile strength DCDT is more preferably 13.0 N / 25 mm or less, and even more preferably 12.0 N / 25 mm or less.

[0073] (Measurement of tensile strength) The tensile strengths (DMDT, DCDT) of paper towel 40a are measured according to JIS P 8113. For example, they can be measured using a Tensilon universal tester STB-1225S (manufactured by A&D Company, Limited) in accordance with JIS P 8113. However, the width dimension of the test specimen (in the direction perpendicular to the tensile direction of the Tensilon universal tester) is 25 mm, the distance between the grips is 100 mm, and the tensile speed is 50 mm / min. The measurement is performed after holding the specimen in equilibrium under the temperature and humidity conditions specified in JIS P 8111 (23 ± 1 °C, 50 ± 2 % RH).

[0074] If the tensile strengths of DMDT and DCDT are lowered to below 6.0 N / 25 mm, the paper towel roll 40 becomes more susceptible to damage and deformation. On the other hand, if the tensile strengths of DMDT and DCDT are higher than 14.0 N / 25 mm, the softness of the paper towel sheet 40a becomes firmer.

[0075] (Water absorption amount) Water absorption per unit area of ​​a 40a paper towel (g / m²) 2 ) is 280g / m 2 More than 570g / m 2 The following is the water absorption rate per unit area: 280 g / m² 2 Making it smaller results in poor water absorption. On the other hand, the water absorption per unit area is 570 g / m². 2If the size is increased beyond this, the basis weight will increase, resulting in a stiffer roll. The lower limit of the above range for water absorption per unit area is 340 g / m². 2 Preferably, it should be 400g / m² or more. 2 It is more preferable that the above values ​​are met. Furthermore, the upper limit of the above range for water absorption per unit area is 520 g / m². 2 Preferably, it is 470 g / m². 2 The following is more preferable:

[0076] The water absorption capacity (g / g) per unit mass of the 40a paper towel is preferably 3.0 g / g or more and 12.0 g / g or less. If the water absorption capacity per unit mass is less than 3.0 g / g, the water absorption will be poor. On the other hand, if the water absorption capacity per unit mass is greater than 12.0 g / g, the specific volume will be high and the roll will become stiff. The lower limit of the above range for water absorption capacity per unit mass is preferably 6.0 g / g or more, and more preferably 8.7 g / g or more. The upper limit of the above range for water absorption capacity per unit mass is more preferably 11.0 g / g or less, and even more preferably 10.5 g / g or less.

[0077] The amount of water absorbed by the dry paper towel 40a was measured according to the following method. First, a two-ply stacked paper towel was taken and cut using a 7.6 cm square template to create a rectangular test piece 200 (see Figure 5) with sides of 7.6 cm. The weight of the test piece 200 before water absorption was measured using an electronic balance. The test piece 200 was then placed in a holder 210 (a jig that fixes the test piece at three points, and the jig is made of a metal that does not absorb moisture).

[0078] Next, fill a commercially available tray with distilled water to a depth of 2 cm, and immerse the test piece 200, which is set in the holder 210, in the distilled water for 2 minutes. After 2 minutes of immersion, remove the test piece 200 together with the holder 210 from the distilled water, and as shown in Figure 5, hang the holder 210 and the test piece 200 from a rod placed in an empty water tank with a predetermined corner 200a facing upwards, close the lid of the water tank, and leave it for 5 minutes.

[0079] Next, the holder 210 and test specimen 200 are removed from the water bath, the test specimen 200 is removed from the holder 210, and the weight of the test specimen 200 is measured using an electronic balance. From the change in weight of the test specimen 200 before and after immersion in distilled water, the amount of distilled water absorbed per unit area of ​​the test specimen 200 (water g / sheet m) is determined. 2 , 1m 2 Correct. Abbreviated as g / m 2 Calculate the amount of water absorbed per unit area (water g / sheet m). 2 By dividing this by the basis weight of the product ply of 200 test pieces, the water absorption per unit area (water g / sheet m²) can be calculated. 2 ) / Basis weight (sheet g / sheet m 2 ) = Calculate the amount of water absorbed per unit weight (water g / sheet g, per gram; abbreviated as g / g). Measurements are taken 5 times for each sample, and the average value is used.

[0080] Furthermore, even if the paper towel is 3-ply, it is preferable to measure it as is, using the same procedure as for 2-ply. This measurement should be performed according to the JIS P 8111 method, at a temperature of 23±1°C and a humidity of 50±2%. The distilled water should also be maintained at 23±1°C.

[0081] (Embossing area ratio) The embossed area ratio of the paper towel 40a (hereinafter sometimes simply referred to as "embossed area ratio") is preferably 8% or more and 20% or less. If the embossed area ratio is less than 8%, the roll becomes stiffer. On the other hand, if the embossed area ratio is greater than 20%, the softness of the sheet deteriorates. In other words, by setting the embossed area ratio within the above range, even if pressure is applied to the paper towel 40a from the film packaging (first outer film 30, second outer film 50) or adjacent paper towel rolls 40, the embossing is less likely to be crushed, and the water absorption and softness of the sheet can be maintained. The lower limit of the embossed area ratio within the above range is preferably 9% or more, and more preferably 10% or more. The upper limit of the embossed area ratio within the above range is more preferably 18% or less, and even more preferably 16% or less.

[0082] The embossed area ratio is determined by measuring the area of ​​the recessed areas of the embossed pattern on the surface of a 40a paper towel using a microscope VR-6100 (manufactured by Keyence Corporation), and converting it to a ratio per unit area (area ratio).

[0083] The above area ratio is calculated by taking the inside of a rectangle E that contains the entirety of one embossed pattern as shown in Figure 6, and measuring the total length of the embossed areas within the rectangle E, which has a thickness of 0.1 mm to 4 mm and a length of 5 mm or more. The total length is calculated as the sum of the embossed lengths, and the area of ​​the emboss is calculated as total length (mm) × width (mm). The area of ​​one sheet of paper towel 40a is (sheet length × sheet width), and the ratio is calculated as (embossed area / area of ​​one sheet of paper towel 40a) × 100 (%). If it is difficult to determine the embossed area ratio, the area ratio of the raised part of the embossing roll used for embossing can be considered as the area ratio of one sheet of paper towel 40a.

[0084] The size of one side of rectangle E can be appropriately changed depending on the size of the embossed pattern. Furthermore, if an embossed pattern adjacent to an embossed pattern contained within a rectangle that encompasses all of the embossed patterns, the length of that adjacent embossed pattern should also be measured and included in the total length. If the size of one side of rectangle E cannot be clearly determined by the embossed pattern, the size of rectangle E should be set to 10 × 10 cm, and the total length of the embossed patterns contained within this rectangle should be measured. The total length should be determined by actual measurement using a ruler, measuring tape, etc., as described above. If visual inspection of the embossing is difficult, a general microscope may be used for measurement.

[0085] (Circumference of multiple paper towel packages with the above predetermined direction as the axis) In the paper towel packaging package 10 shown in Figures 1 and 2(a), the direction in which the two paper towel rolls 40 wrapped in the second outer film 50 of the paper towel packaging 20 are adjacent (Y direction) is the V direction (the predetermined direction) where the seal portion 30a of the first outer film 30 of the paper towel packaging package 10 is provided. That is, in the paper towel packaging package 10 shown in Figures 1 and 2(a), the paper towel packaging 20 is arranged in a row of two or three in the Y direction and in a row of three in the Z direction, with the Y direction being the predetermined direction.

[0086] In the case of the paper towel packaging 10 shown in Figures 1 and 2(a), the perimeter A (hereinafter sometimes simply referred to as "perimeter A") of the multiple paper towel packages 20 arranged in a line before being wrapped with the first outer film 30, with respect to the V-direction, is preferably 1300 mm or more and 1700 mm or less. If the perimeter A is smaller than 1300 mm, the paper towel roll 40 may be crushed and deformed. On the other hand, if the perimeter A is larger than 1700 mm, the tightness will be poor. The lower limit of the above range for perimeter A is more preferably 1350 mm or more, and even more preferably 1450 mm or more. The upper limit of the above range for perimeter A is more preferably 1600 mm or less, and even more preferably 1500 mm or less.

[0087] The circumference A is measured from above the second outer film 50, with the dimensions of each point of the circumference A, with the V direction as the axis, while the multiple paper towel packages 20 are arranged to be packaged (as shown in Figures 1 and 2) before being wrapped with the first outer film 30. The circumference A is the total length in the direction along the four arrows a1 to a4 shown in Figure 1. When measuring the circumference A, the lengths in the direction along arrows a1 and a2 are the lengths in the Z direction along the top surface 20a and bottom surface 20b of the multiple (three in the figure) paper towel packages 20 arranged in the Z direction, and the total length is approximately 6 times the winding diameter DR of the paper towel roll 40. Also, when measuring the circumference A, the lengths in the direction along arrows a3 and a4 are the lengths in the X direction along the side surface of the paper towel package 20, and the total length is approximately 2 times the roll width W. In other words, in the case of the paper towel packaging 10 shown in Figures 1 and 2(a), the circumference A is approximately the same as ((roll diameter DR) × 6) + ((roll width W) × 2). Thus, the circumference A can also be determined from the roll diameter DR and roll width W of the paper towel roll 40.

[0088] (Circumference of the paper towel packaging with the above-mentioned predetermined direction as the axis) In the case of the paper towel packaging 10 shown in Figures 1 and 2(a), the perimeter B of the first outer film 30 of the paper towel packaging 10, when the axis is defined in the predetermined direction (hereinafter sometimes simply referred to as "perimeter B"), is preferably 1260 mm or more and 2000 mm or less. If the perimeter B is smaller than 1260 mm, the paper towel roll 40 may be crushed and deformed. On the other hand, if the perimeter B is larger than 2000 mm, the tightness will be poor. The lower limit of the above range for perimeter B is more preferably 1400 mm or more, and even more preferably 1450 mm or more. The upper limit of the above range for perimeter B is more preferably 1840 mm or less, and even more preferably 1730 mm or less.

[0089] When measuring the circumference B of the first outer film 30, for example, the seal portions 30a on both sides in the V direction of the first outer film 30 of the paper towel packaging package 10 are cut open to remove the paper towel packaging 20 and make the first outer film 30 cylindrical. Next, the gusseted portions on both sides of the first outer film 30 in the direction intersecting the V direction (Z direction in the figure) are folded outwards, and the two sides of the first outer film 30 in the axial direction (X direction) are overlapped to flatten the cylindrical first outer film 30. The length in the direction intersecting the V direction of the first outer film 30 in this flattened state is measured, and twice the measured value is taken as the circumference B of the first outer film 30. Alternatively, the actual dimensions of both sides of the first outer film 30 in the flattened state (length in the direction intersecting the V direction) may be measured.

[0090] (Relationship between circumference A and circumference B) In the paper towel packaging package 10 according to this disclosure, the ratio of circumference B to circumference A (hereinafter referred to as "circumference ratio C") is preferably 97% or more and 115% or less. The circumference ratio C is a value (%) expressed by the formula: (Circumference B (mm) when the first outer film 30 of the paper towel packaging package 10 is axial in the V direction) / (Circumference A (mm) when the multiple paper towel packaging units 20 arranged in a line before being wrapped in the first outer film 30 are axial in the V direction) × 100. If the circumference ratio C is less than 97%, the paper towel roll 40 becomes more susceptible to crushing and deformation. On the other hand, if the circumference ratio C is greater than 115%, the tightness is poor. The lower limit of the above range for the circumference ratio C is more preferably 99% or more, and even more preferably 101% or more. The upper limit of the above range for the circumference ratio C is more preferably 110% or less, and even more preferably 106% or less.

[0091] (Relationship between circumference ratio and winding flexibility) In the paper towel packaging package 10 according to this disclosure, the value D (hereinafter sometimes simply referred to as "value D"), expressed by the formula: (circumference ratio C (%)) / (winding softness of the paper towel roll 40 (mm)), is preferably 20 or more and 80 or less. If value D is less than 20, the paper towel roll 40 becomes more prone to crushing and deformation. On the other hand, if value D is greater than 80, the tightness is poor. The lower limit of the above range for value D is more preferably 30 or more, and even more preferably 35 or more. The upper limit of the above range for value D is more preferably 70 or less, and even more preferably 50 or less.

[0092] (Relationship between circumference ratio and winding density) In the paper towel packaging package 10 relating to this disclosure, the formula is: (Perimeter ratio C (%)) / (Wound density of paper towel roll 40 (m / cm) 2 The value E represented by )) (hereinafter sometimes simply referred to as "value E") is preferably between 180 and 450. If value E is less than 180, the tightness will be poor. On the other hand, if value E is greater than 450, the paper towel roll 40 will be more prone to crushing and deformation. The lower limit of the above range for value E is more preferably 210 or more, and even more preferably 290 or more. The upper limit of the above range for value E is more preferably 410 or less, and even more preferably 370 or less.

[0093] (Drop from the top surface of the table) As shown in Figure 7, in the paper towel packaging 10 according to this disclosure, the drop hd from the upper surface 101 of the base 100 (hereinafter sometimes referred to as "drop hd from the base surface") is set appropriately.

[0094] As shown in Figure 7, when measuring the drop hd from the table surface, first, the paper towel packaging package 10 is placed on the table 100. Next, all the paper towel packaging 20 are moved to one side (left side in the figure) in the predetermined direction (V direction) within the first outer film 30. That is, all the paper towel packaging 20 within the first outer film 30 are moved to one side of the seal portion 30a of the first outer film 30. Next, the row of paper towel packaging 20A located on the farther side (right side in the figure) in the predetermined direction (V direction) among the multiple paper towel packaging 20 is dropped outside the edge of the table 100. At this time, the farther side in the V direction of the row of paper towel packaging 20B located next to the row of paper towel packaging 20A is positioned along the edge of the table 100, and the row of paper towel packaging 20A is dropped outside the edge of the table 100.

[0095] In the case of the paper towel packaging 10 shown in Figures 1 and 2(a) to (c), the Y-direction in which the two paper towel rolls 40 of the paper towel packaging 20 are aligned aligns with the predetermined direction (V-direction) of the first outer film 30. Therefore, in this case, when dropping the row of paper towel packaging 20A located on the far side to the edge of the base 100 in order to measure the drop hd from the base surface, the two rows of paper towel rolls 40 will be dropped to the edge of the base 100 when viewed from a direction intersecting the V-direction, as shown in Figure 7(a).

[0096] On the other hand, in the case of the paper towel packaging 10 shown in Figure 2(d), the Z direction, which is the thickness direction of the paper towel packaging 20, aligns with the predetermined direction (V direction) of the first outer film 30. Therefore, in this case, when dropping the row of paper towel packaging 20A located on the far side to measure the drop hd from the table surface, one row of paper towel rolls 40 will be dropped to the outside of the edge of the table 100 when viewed from a direction intersecting the V direction, as shown in Figure 7(b).

[0097] Next, the drop hd of the paper towel packaging 20A that falls from the top surface 101 of the table 100 is measured. The drop hd of the paper towel packaging 20A that falls from the top surface 101 of the table 100 is measured at the four corners of the bottom surface of the row of paper towel packaging 20A (the four corners of the sides extending in the V direction and the sides extending in the depth direction of the drawing). Furthermore, the paper towel packaging package 10 is rotated around the X direction as an axis, and the drop hd of the paper towel packaging 20 located at the end opposite to the paper towel packaging 20A is measured in the same manner as above. Then, the average of the eight measured values ​​taken on both sides in the predetermined direction (V direction) is calculated and given as the drop hd from the table surface.

[0098] The drop hd from the tabletop in the paper towel packaging package 10 is between 10 mm and 45 mm. If the drop hd from the tabletop is less than 10 mm, the packaging by the first outer film 30 becomes too tight, causing the paper towel roll 40 to be crushed and deformed. On the other hand, if the drop hd from the tabletop is longer than 45 mm, it is not possible to ensure a tight fit. The lower limit of the above range for the drop hd from the tabletop is preferably 14 mm or more, and more preferably 17 mm or more. The upper limit of the above range for the drop hd from the tabletop is preferably 34 mm or less, and more preferably 28 mm or less. The drop hd from the tabletop can be set within the above range by adjusting the size and winding flexibility of the first outer film 30.

[0099] Although the present invention has been described above based on the above embodiments, the present invention is not limited to the contents of the above embodiments, and can naturally be modified as appropriate without departing from the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on these embodiments are of course included in the scope of the present invention. [Examples]

[0100] The present invention will be described in more detail below with reference to examples and comparative examples. However, the present invention is not limited in any way by the following examples.

[0101] (Examples 1-15 and Comparative Examples 1-6) Paper towel packaging for Examples 1-15 and Comparative Examples 1-6 was prepared under the conditions shown in Tables 1 and 2. Each paper towel packaging was then evaluated using the following five criteria: "tightness," "roll deformation and damage," "water absorption," "sheet softness," and "roll softness." Each evaluation was performed after maintaining equilibrium under the temperature and humidity conditions specified in JIS P8111 (23±1℃, 50±2%RH). Other parameters were evaluated according to the standards or measurement methods described above. Kitchen towels were used.

[0102] (Tightness) The "tightness" evaluation was conducted through sensory evaluation by 20 monitors, who selected "good" or "bad" for the overall tightness of the packaging of the first and second outer films. The evaluation was then carried out according to the following criteria. 5 points: 18 or more people gave it a "good" rating. 4 points: 14 to 17 people gave a "Good" rating. 3 points: 10 to 13 people gave a "Good" rating. 2 points: 7 to 9 people gave a "Good" rating. 1 point: 6 or fewer people gave a "Good" rating.

[0103] (Deformation and damage to the roll) The evaluation of "roll deformation and damage" was a sensory evaluation conducted by 20 monitors, who selected "yes" or "no" for deformation or damage to the paper towel roll upon opening and use. The evaluation was then conducted according to the following criteria. 5 points: 18 or more people answered "None". 4 points: 14 to 17 people answered "none". 3 points: 10 to 13 people answered "none". 2 points: 7 to 9 people answered "none". 1 point: 6 or fewer people answered "none".

[0104] (Water absorption) The "water absorption" was evaluated by measuring the amount of water absorbed per unit area. The evaluation was then carried out according to the following criteria. 5 points: Water absorption per unit area is 400g / m² 2 That's all. 4 points: Water absorption per unit area is 340 g / m² 2 More than 400g / m 2 less than 3. Water absorption per unit area is 280 g / m². 2 More than 340g / m 2 less than 2 points: Water absorption per unit area is 260 g / m² 2 More than 280g / m 2 less than 1 point: Water absorption per unit area is 260 g / m² 2 less than

[0105] (Seat softness) The evaluation of "sheet softness" was a sensory evaluation conducted by 20 monitors, who selected either "soft" or "hard" when using the paper towels. The evaluation was then conducted according to the following criteria. 5 points: More than 18 people found it "soft". 4 points: "Soft" - 14 to 17 people 3 points: "Soft" - 10 to 13 people 2 points: "Soft" - 7 to 9 people 1 point: "Soft" - 6 people or less

[0106] (Softness of the roll) The "roll softness" was evaluated by measuring the winding softness. The evaluation was then conducted according to the following criteria. 5 points: The measurement result for winding flexibility is 1.6 mm or more. 4 points: The measurement result for winding flexibility is between 1.4mm and 1.6mm. 3 points: The measurement result for winding flexibility is between 1.2mm and 1.4mm. 2 points: The measurement result for winding flexibility is between 1.0 mm and less than 1.2 mm. 1 point: The measurement result for winding flexibility is less than 1.0 mm.

[0107] The results obtained are shown in Tables 1 and 2.

[0108] [Table 1]

[0109] [Table 2]

[0110] Thus, as can be seen from Tables 1 and 2, this disclosure provides a paper towel packaging that allows for tight packaging even when 6 to 12 two-roll paper towel packages are film-wrapped together, while maintaining the softness and absorbency of the sheets and rolls, and suppressing deformation of the paper towel rolls. [Explanation of Symbols]

[0111] 10: Paper towel packaging 20, 20A, 20B: Paper towel packaging 30: First exterior film 40: Paper towel roll 40a: Paper towels 41: Core 50: Second exterior film 100: units 101:Top surface

Claims

1. A paper towel packaging package comprising multiple paper towel packages containing two rolls each, wrapped in a first outer film, The aforementioned paper towel packaging is a packaging in which two rolls of paper towels, which have been wound into a roll shape, are arranged in a straight line in a first direction intersecting the axial direction and wrapped with a second outer film, and two or three rolls are arranged in the first direction and three or four rolls are arranged in a second direction intersecting both the axial direction and the first direction and wrapped with the first outer film. The first outer film has sealing portions on both sides in a predetermined direction, The winding density of the aforementioned paper towel roll is 0.15 m / cm ２ 0.60m / cm or more ２ The following: The roll thickness of the aforementioned paper towel roll is between 1.2 mm and 4.0 mm. When the paper towel packaging is placed on a table, all of the paper towel packaging is moved to one side in the predetermined direction, and the paper towel packaging located on the far side in the predetermined direction is dropped outside the edge of the table, the drop from the top surface of the table is 10 mm or more and 45 mm or less. The water absorption capacity per unit area of ​​the aforementioned paper towel is 280 g / m². ２ More than 570g / m ２ The following is A paper towel packaging characterized by the following features.

2. The diameter of the paper towel roll is 125 mm or more and 175 mm or less. The paper towel packaging according to feature 1.

3. The basis weight of the product ply of the aforementioned paper towel is 33 g / m². ２ 65g / m or more ２ The following is A paper towel packaging according to claim 1 or 2.

4. The paper thickness of the aforementioned paper towel is 0.4 mm / ply or more and 1.0 mm / ply or less. A paper towel packaging according to claim 1 or 2.

5. The water absorption capacity per unit mass of the aforementioned paper towel is 3.0 g / g or more and 12.0 g / g or less. A paper towel packaging according to claim 1 or 2.

6. The length of the aforementioned paper towel roll is between 20m and 50m. A paper towel packaging according to claim 1 or 2.

7. The aforementioned paper towel has an embossed surface. The embossing area ratio of the aforementioned embossing is 8% or more and 20% or less. A paper towel packaging according to claim 1 or 2.

8. The core-excluded roll weight per 280 mm width of the aforementioned paper towel roll is between 190 g and 620 g. A paper towel packaging according to claim 1 or 2.

9. The roll density of the aforementioned paper towel roll is 0.03 g / cm³. ３ 0.20g / cm or more ３ The following is A paper towel packaging according to claim 1 or 2.

10. The paper towel packaging is arranged in such a way that two or three are placed in the first direction and three in the second direction within the first outer film, with the first direction being the predetermined direction. The circumference A of the multiple paper towel packages arranged in a line before being wrapped with the first outer film, with respect to the predetermined direction, is 1300 mm or more and 1700 mm or less. A paper towel packaging according to claim 1 or 2.

11. The circumference B of the first outer film of the paper towel packaging, when the predetermined direction is considered as the axis, is 1260 mm or more and 2000 mm or less. The paper towel packaging according to feature 10.

12. The value (%) expressed by (the circumference B (mm) of the first outer film of the paper towel packaging package when the predetermined direction is used as the axis) / (the circumference A (mm) of the multiple paper towel packaging units in their arranged state before being wrapped in the first outer film, when the predetermined direction is used as the axis) × 100 is 97% or more and 115% or less. A paper towel packaging according to claim 1 or 2.

13. The value expressed as {(Circumference B (mm) of the first outer film of the paper towel packaging package when the predetermined direction is used as the axis) / (Circumference A (mm) of the second outer film of the multiple paper towel packaging units arranged before being wrapped with the first outer film, when the predetermined direction is used as the axis) × 100} / (Winding flexibility of the paper towel roll (mm)) is between 20 and 80. A paper towel packaging according to claim 1 or 2.

14. {(Perimeter B (mm) of the first outer film of the paper towel package in the case of taking the predetermined direction as the axis) / (Perimeter A (mm) of the second outer film of the plurality of paper towel packages in the arranged state before being packaged with the first outer film in the case of taking the predetermined direction as the axis) × 100} / (Winding density (m / cm ２ )) of the paper towel roll), the value represented by is 180 or more and 450 or less A paper towel packaging according to claim 1 or 2.

15. The dry tensile strength (DMDT) in the MD direction of the product ply of the aforementioned paper towel, according to JIS P 8113, is 6.0 N / 25 mm or more and 14.0 N / 25 mm or less. A paper towel packaging according to claim 1 or 2.

16. The tensile strength DCDT in the CD direction of the product ply of the aforementioned paper towel, according to JIS P 8113, is 6.0 N / 25 mm or more and 14.0 N / 25 mm or less. A paper towel packaging according to claim 1 or 2.

17. The aforementioned paper towel roll has a cylindrical core in the center, The apparent basis weight of the core is 200 g / m². ２ More than 500g / m ２ The following is A paper towel packaging according to claim 1 or 2.

18. The aforementioned paper towel roll has a cylindrical core in the center, The outer diameter of the core is 28 mm or more and 58 mm or less. A paper towel packaging according to claim 1 or 2.

19. The aforementioned paper towel roll has a cylindrical core in the center, The core contains LBKP (bleached hardwood kraft pulp). A paper towel packaging according to claim 1 or 2.

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