Paper towel package

Abstract

To maintain the tightness and quality of a paper towel package in which a plurality of paper towel packages are collectively wrapped in an outer film, and to enable hygienic storage.SOLUTION: This disclosure relates to a paper towel packaging unit. The paper towel packaging unit 20, comprising 3 to 5 paper towel rolls 40 arranged side-by-side and wrapped in a caramel-style package using a second outer film 50, is arranged in groups of two or more but no more than five and wrapped in a first outer film 30. The first outer film 30 has heat-sealed sections 30a on both sides. The paper towel roll 40 has a winding density of 0.15 m / cm2 or more but not exceeding 0.60 m / cm2, a winding softness of 1.2 mm or more but not exceeding 4.0 mm, the sagging amount of the second exterior film 50 is 4 mm or more but not more than 20 mm, the absorbency is 290 g / m2 or more but not more than 580 g / m2, the thickness of the first outer film 30 is 25 μm or more but not more than 90 μm, and the weight of the paper towel package 10 is 1.8 kg or more but not more than 12.5 kg.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to paper towel wrapper packages. [Background technology]

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

[0003] For example, Patent Document 1 discloses a toilet roll package in which 10 toilet rolls are gusset-packaged with an exterior film. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-116302 Summary of the Invention [Problem to be solved by the invention]

[0005] Generally, it is preferable that film packaging for roll products be tightly wrapped around the roll product inside in order to maintain the quality of the roll product inside and to improve the appearance of the packaging.

[0006] For large-capacity products containing a large number of roll products, such as the toilet roll packaging described in Patent Document 1, it is common to directly package the roll products in an exterior film. However, when many roll products are directly packaged in an exterior film, the individual roll products tend to move around easily within the exterior film, which can damage the roll products and makes it difficult to maintain a tight seal. Furthermore, when the exterior film is opened, the roll products are directly exposed, which is unhygienic when removing only the required amount and storing the remaining roll products.

[0007] To solve these problems, it is conceivable to package multiple roll product packages, each containing multiple roll products, by wrapping them together in an exterior film. This makes it possible to maintain hygiene and quality even in large-volume products containing a large number of roll products, and because the multiple roll products are packaged together in the inner roll product package, the roll products are less likely to move around each other than when packaged directly in an exterior film, making it easier to maintain tightness.

[0008] However, in such packaged products (paper towel packaging packages), the roll product (paper towel roll) may be packed too tightly, causing the paper towel roll to be crushed and unable to maintain its quality. One approach to preventing damage to the paper towel roll is to make the paper towel roll harder, but if the paper towel roll is made harder, its soft texture and quality cannot be maintained.

[0009] Therefore, the present disclosure aims to provide a paper towel package that can maintain tightness and quality and be stored hygienically, even when multiple paper towel packages, each of which is made by packaging multiple paper towel rolls together, are further packaged together in an outer film. [Means for solving the problem]

[0010] In order to solve the above-mentioned problems, a first aspect of the present invention is a paper towel package package in which a plurality of paper towel packages are packaged in a first exterior film, and the paper towel packages are paper towel rolls, each of which is formed by winding paper towels into a roll, and are arranged in a straight line in a first direction intersecting the axial direction, and are then caramel-wrapped in a second exterior film, and the paper towel packages are arranged in a line of 2 to 5 rolls in a second direction intersecting both the axial direction and the first direction, and are packaged in the first exterior film, and the first exterior film has heat-sealed portions on both sides in the second direction, and the winding density of the paper towel roll is 0.15 m / cm. 2 More than 0.60m / cm 2The paper towel roll has a winding softness of 1.2 mm or more and 4.0 mm or less, and when a stainless steel ruler 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 on the second exterior film wrapped across adjacent paper towel rolls, the amount of sagging of the second exterior film is 4 mm or more and 20 mm or less, and the water absorption per unit area of ​​the paper towel is 290 g / m 2 More than 580g / m 2 The thickness of the first exterior film is 25 μm or more and 90 μm or less, and the weight of the paper towel wrapper package is 1.8 kg or more and 12.5 kg or less.

[0011] A second aspect of the present invention is the paper towel package of the first aspect, wherein the first exterior film is a pillow package having gusset portions on both sides of the heat-sealed portion.

[0012] A third aspect of the present invention is the paper towel wrapper package of the first aspect or the second aspect, wherein the paper towels have a thickness of 2.0 mm / 10 ply or more and 5.0 mm / 10 ply or less.

[0013] A fourth aspect of the present invention is the paper towel wrapper package of the first aspect or the second aspect, wherein the roll diameter of the paper towel roll is 125 mm or more and 175 mm or less.

[0014] A fifth aspect of the present invention is the paper towel wrapper package of the first aspect or the second aspect, wherein the basis weight of the paper towel product ply is 33 g / m 2 More than 65g / m 2 The following is the result.

[0015] A sixth aspect of the present invention is the paper towel wrapper package of the first aspect or the 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.

[0016] A seventh aspect of the present invention is the paper towel wrapper package of the first aspect or the second aspect, wherein the roll length of the paper towel roll is 20 m or more and 50 m or less.

[0017] An eighth aspect of the present invention is a paper towel wrapper package 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.

[0018] A ninth aspect of the present invention is the paper towel wrapper package of the first aspect or the second aspect, wherein the roll density of the paper towel roll is 0.03 g / cm 3 More than 0.20g / cm 3 The following is the result.

[0019] A tenth aspect of the present invention is a paper towel wrapper package of the first aspect or the second aspect, wherein the value represented by the formula: (amount of sagging of the second outer film) / (winding softness of the paper towel roll) is 1.7 or more and 14.0 or less.

[0020] An eleventh aspect of the present invention is a paper towel wrapper package of the first aspect or the second aspect, wherein the value represented by the formula: (amount of sagging of the second outer film) / (winding density of the paper towel roll) is 10 or more and 60 or less.

[0021] A twelfth aspect of the present invention is a paper towel packaging package of the first aspect or the second aspect, wherein an embossment is formed on the paper towel, and the embossment area ratio of the embossment is 8% or more and 20% or less.

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

[0023] A fourteenth aspect of the present invention is a paper towel packaging package according to the first or second aspect, wherein the tensile strength (DCDT) in the CD direction when dry based on JIS P 8113 of the paper towel product ply is 6.0 N / 25 mm or more and 14.0 N / 25 mm or less.

[0024] A fifteenth aspect of the present invention is the paper towel wrapper package of the first aspect or the second aspect, wherein the paper towel roll has a cylindrical core at the center, and the apparent basis weight of the core is 280 g / m 2 More than 530g / m 2 The following is the result.

[0025] A 16th aspect of the present invention is a paper towel wrapper package of the first aspect or the 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.

[0026] A seventeenth aspect of the present invention is a paper towel wrapper package according to the first or second aspect, wherein the paper towel roll has a cylindrical core in the center, and the core contains LBKP (hardwood bleached kraft pulp). [Effects of the Invention]

[0027] According to the present disclosure, it is possible to provide a paper towel package package that maintains tightness and quality and can be stored hygienically, even when multiple paper towel packages, each of which is made by packaging multiple paper towel rolls together, are further packaged together in an outer film. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a perspective view of a paper towel wrapper package according to one embodiment of the present invention. FIG. [Figure 2] FIG. 1 is a perspective view of a paper towel package. [Figure 3]10A and 10B are perspective views showing modified examples of paper towel packaging, where (a) shows four paper towel rolls arranged in the width direction, and (b) shows five paper towel rolls arranged in the width direction. [Figure 4] FIG. 1 is a perspective view of a paper towel roll. [Figure 5] FIG. 1 is a diagram showing a method for measuring the water absorption of a paper towel. [Figure 6] FIG. 1 is a diagram showing an example of an embossed pattern on a paper towel. [Figure 7] FIG. 10 is an explanatory diagram showing a method for measuring the amount of sagging of the second exterior film in a paper towel package. DETAILED DESCRIPTION OF THE INVENTION

[0029] 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 shown below. Note that the axial direction refers to the axial direction of the paper towel roll, which is the X direction in the drawings. The width direction (first direction) refers to the direction intersecting (perpendicular to) the axial direction, and is the direction in which the paper towel rolls are lined up in the paper towel package, which is the Y direction in the drawings. The thickness direction (second direction) refers to the thickness direction of the paper towel package, and is the direction intersecting (perpendicular to) both the axial direction and the width direction, which is the Z direction in the drawings. In the following description, the axial direction may be referred to as the X direction, the width direction may be referred to as the Y direction, and the thickness direction may be referred to as the Z direction.

[0030] FIG. 1 is a perspective view of a paper towel package according to one embodiment of the present invention. FIG. 2 is a perspective view of the paper towel package. FIG. 3 is a perspective view of a modified paper towel package, where (a) shows four paper towel rolls arranged in the width direction, and (b) shows five paper towel rolls arranged in the width direction. FIG. 4 is a perspective view of a paper towel roll. FIG. 5 is a diagram showing a method for measuring the water absorption of a paper towel. FIG. 6 is a diagram showing an example of an embossed pattern of a paper towel. FIG. 7 is an explanatory diagram showing a method for measuring the amount of sagging of the second exterior film in a paper towel package.

[0031] <Paper towel packaging> As shown in Fig. 1, paper towel package 10 according to this embodiment is formed by collectively packaging a plurality of paper towel packages 20 (four in Fig. 1) in a first exterior film 30. In paper towel package 10, a plurality of paper towel packages 20 are arranged in the thickness direction (Z direction) and packaged in first exterior film 30. As shown in Fig. 2, paper towel package 20 is formed by collectively packaging a plurality of paper towel rolls 40 (three in Fig. 2) in a caramel-wrapped second exterior film 50.

[0032] As will be described later, in the paper towel package 10 according to this embodiment, the winding density of the paper towel roll 40, the winding softness of the paper towel roll 40, the amount of sagging of the second exterior film 50, the amount of water absorption per unit area of ​​the paper towel, the thickness of the first exterior film 30, and the weight of the paper towel package 10 are appropriately set. As a result, according to this embodiment, even when a plurality of paper towel packages 20, each of which is made up of a plurality of paper towel rolls 40 packaged together, are further packaged together in an exterior film (first exterior film 30), a paper towel package 10 can be provided that maintains tightness and quality and can be stored hygienically.

[0033] The details of each component are as follows:

[0034] (Number of toilet roll packages) As shown in FIG. 1, paper towel package 10 contains two to five (four in the figure) paper towel packages 20 arranged in a single row in the thickness direction (Z direction) and in the axial direction (X direction), and is packaged in first exterior film 30. If only one paper towel package 20 is packaged, the number will be too small, resulting in overpackaging. On the other hand, if six or more paper towel packages 20 are packaged, the number of paper towel rolls 40 that collide with each other will increase, making the paper towel roll 40 more likely to be crushed and deformed. The number of paper towel packages 20 is preferably three to four, and more preferably four.

[0035] (pack weight) The weight of the paper towel package 10 (hereinafter sometimes referred to as "pack weight") is 1.8 kg or more and 12.5 kg or less. If the pack weight is lighter than 1.8 kg, the tightness is inferior. On the other hand, if the pack weight is heavier than 12.5 kg, the paper towel roll 40 is more likely to be crushed and deformed. The lower limit of the above range of pack weight is more preferably 2.5 kg or more, and even more preferably 3.6 kg or more. The upper limit of the above range of pack weight is more preferably 8.5 kg or less, and even more preferably 5.5 kg or less.

[0036] <First exterior film> 1, first exterior film 30 is a resin film that packages multiple paper towel packages 20. First exterior film 30 covers, from all directions, multiple paper towel packages 20 that are arranged side by side in the thickness direction.

[0037] Examples of resin films used for the first exterior film 30 include LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), HDPE (high-density polyethylene), CPP (coated polypropylene), and films obtained by blending or mixing these materials. These films may also be laminated, coated, or multi-layered with other materials. Examples of such 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 exterior film 30. By using LLDPE, LDPE, or a mixture thereof for the resin film used for the first exterior film 30, even when multiple paper towel packages 20 are packaged, the paper towel roll 40 can be tightly packaged and less likely to deform.

[0038] First exterior film 30 has heat-sealed portions 30a on both sides in the thickness direction (Z direction) of paper towel package 20. For example, multiple paper towel packages 20 are packaged in first exterior film 30 of this embodiment in a pillow package.

[0039] Pillow packaging is well known. For example, a plurality of paper towel packages 20 are placed on or under a sheet-like first exterior film 30, and the first exterior film 30 is then wound into a cylindrical shape to encase the plurality of paper towel packages 20. The outer surface of the inner film and the inner surface of the outer film are bonded (heat sealed, etc.) (not shown) at the overlapping portions (Z direction) of both ends of the first exterior film 30. At this time, the first exterior film 30 is wound into a cylindrical shape extending in the Z direction. The openings on both sides of the cylindrically wound first exterior film 30 in the Z direction are then gusset-folded and heat-sealed in a horizontal line in the width direction (Y direction), and the film is cut into individual bags at the sealed portions. This results in heat-sealed portions 30a on both sides of the first exterior film 30 in the Z direction. Furthermore, as in this embodiment, it is preferable to provide gusset portions 30b on both sides of the width direction of the heat-sealed portions 30a.

[0040] (Thickness of the first exterior film) The thickness of the first exterior film 30 is 25 μm or more and 90 μm or less. If the thickness of the first exterior film 30 is less than 25 μm, the strength of the film will be reduced and the tightness will be poor. On the other hand, if the thickness of the first exterior film 30 is more than 90 μm, it will be difficult to determine the softness of the roll at the time of purchase. The lower limit of the above range of the thickness of the first exterior film 30 is preferably 30 μm or more, and more preferably 35 μm or more. The upper limit of the above range of the thickness of the first exterior film 30 is preferably 70 μm or less, and more preferably 55 μm or less. The thickness of the first exterior film 30 is measured in accordance with JIS K 7130.

[0041] <Paper towel packaging> As shown in Fig. 2, the paper towel package 20 is formed by arranging three to five rolls (three rolls in the figure) of paper towel rolls 40 in a row in the axial direction (X direction) and linearly lining them up in the width direction (Y direction), and then caramel-wrapping them in a second exterior film 50. The paper towel rolls 40 are linearly lined up in the width direction (Y direction) with their axes parallel to each other, and their outer peripheries are in contact with each other. Note that in this embodiment, as shown in Fig. 2, three rolls of paper towel rolls 40 are packaged side by side, but this is not limited thereto. For example, four rolls of paper towel rolls 40 may be packaged side by side as shown in Fig. 3(a), or five rolls of paper towel rolls 40 may be packaged side by side as shown in Fig. 3(b).

[0042] <Second exterior film> 2, second exterior film 50 is a resin film that packages multiple paper towel rolls 40 together. Second exterior film 50 covers paper towel rolls 40 in all directions, which are arranged in a single row in height and in a straight line in the width direction.

[0043] Examples of resin films used for the second exterior film 50 include LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), HDPE (high-density polyethylene), CPP (coated polypropylene), and films obtained by blending or mixing these materials. These films may also be laminated, coated, or multi-layered with other materials. Examples of such 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 as the resin film used for the second exterior film 50. By using LLDPE, LDPE, or a mixture thereof as the resin film for the second exterior film 50, the paper towel roll 40 can be tightly packed and less likely to deform, even when the roll is highly absorbent and soft.

[0044] The plurality of paper towel rolls 40 are wrapped in a caramel wrapper by the second exterior film 50. The caramel wrapper makes it easier to maintain the tightness of the wrapper.

[0045] Caramel packaging is well known. For example, multiple paper towel rolls 40 to be packaged are placed side by side in a flattened state on a sheet-like second exterior film 50, and the second exterior film 50 is wrapped around the paper towel rolls 40 in a circumferential direction to form a tube (a tube extending in the axial direction). Two opposing flap-shaped edges of the second exterior film 50 that extend beyond both axial ends of the paper towel roll 40 are folded toward each other, and then two other opposing flap-shaped edges are similarly folded toward each other, and these folded portions are sealed by heat sealing or the like. In this way, both axial end surfaces of each row of caramel-packaged paper towel rolls 40 are positioned approximately flush with each other and face the second exterior film 50 on the top surface 20a and bottom surface 20b of the paper towel package 20.

[0046] <Paper towel roll> 4, paper towel roll 40 is a roll of long paper towels 40a wound up, with a core 41 such as a cylindrical paper tube or cylindrical space in the center. It is preferable that long paper towels 40a have easy-to-tear sections (not shown) such as perforations at predetermined intervals so that they can be cut to a predetermined length.

[0047] (core) Core 41 is located at the center of paper towel roll 40. Core 41 may be a cylindrical paper tube or a cylindrical space. In this embodiment, core 41 of paper towel roll 40 has a cylindrical paper tube made of multiple layers of base paper, and paper towels 40a are wound around this paper tube. In the following description, core 41 refers to core 41 that is a cylindrical paper tube unless otherwise specified.

[0048] The core 41 preferably contains LBKP (bleached hardwood kraft pulp) as the pulp fiber contained in the base paper. That is, 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. By including LBKP in the core 41, the product has a luxurious feel.

[0049] (Core outer diameter) The outer diameter DI of the core 41 (hereinafter referred to as the "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 of the paper towel roll 40 (hereinafter sometimes simply referred to as the "winding diameter DR") will be 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 will be too large. The lower limit of the above range of 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 of the core outer diameter DI is more preferably 52 mm or less, and even more preferably 48 mm or less.

[0050] The core outer diameter DI is measured, for example, using a diameter rule manufactured by Muratec KDS Co., Ltd. Three paper towel rolls 40 are measured and the measurement results are averaged. In the case of a paper towel roll 40 without a core, the diameter of the cylindrical space (center hole) in the center of the paper towel roll 40 is considered to be the core outer diameter DI.

[0051] (core weight) The weight of the core 41 (hereinafter referred to as "core weight") is preferably 10 g or more and 25 g or less. If the core weight is less than 10 g, the diameter of the core 41 becomes small, 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 more than 25 g, the diameter of the core 41 becomes large, and the winding diameter DR of the paper towel roll 40 becomes too large, resulting in crushing and deformation of the paper towel roll 40. The lower limit of the above core weight range is more preferably 12 g or more, and even more preferably 13 g or more. The upper limit of the above core weight range is more preferably 22 g or less, and even more preferably 19 g or less. The core weight is defined as the weight per 280 mm of roll width W. If the roll width W is not 280 mm, it is converted to the weight per 280 mm by proportional calculation. The core weight is measured by measuring the cores 41 of three paper towel rolls 40 and averaging the measurement results. The roll width W means the length of the paper towel roll 40 in the axial direction.

[0052] (Apparent basis weight of core) The apparent basis weight of the core 41 (the basis weight of the core made of multiple layers of base paper) is 280 g / m 2 More than 530g / m 2 The apparent basis weight of the core 41 is preferably 280 g / m or less. 2 If it is smaller than 530g / m 2 If it is larger than this, it becomes difficult to use. In other words, by setting the apparent basis weight of the core 41 within the above range, the core 41 has an appropriate hardness, is difficult to crush, and is easy to fold (crush) when folding (crushing) and discarding the core 41 after using the paper towel roll 40, resulting in excellent ease of use of the roll product. The lower limit of the above range of the apparent basis weight of the core 41 is 330 g / m 2 More preferably, it is 380 g / m or more. 2 The upper limit of the apparent basis weight of the core 41 is 480 g / m 2 More preferably, it is 430 g / m or less. 2It is more preferable that the apparent basis weight of core 41 is less than or equal to 1000. The apparent basis weight of core 41 is measured in accordance with JIS P 8124. The apparent basis weight of core 41 is measured by measuring cores 41 of three paper towel rolls 40 and averaging the measurement results.

[0053] (reel diameter) The roll diameter DR of the paper towel roll 40 is preferably 125 mm or more and 175 mm or less. If the roll diameter DR is smaller than 125 mm, the roll diameter DR will be too small and will not be tight enough. On the other hand, if the roll diameter DR is larger than 175 mm, the roll diameter DR will be too large and will be too tight, which may cause the paper towel roll 40 to be crushed or damaged. The lower limit of the above range of the roll diameter DR is more preferably 135 mm or more, and even more preferably 145 mm or more. The upper limit of the above range of the roll diameter DR is more preferably 165 mm or less, and even more preferably 155 mm or less. The roll diameter DR is measured by measuring three paper towel rolls 40 and averaging the measurement results.

[0054] (Volume length) The winding length of the paper towel roll 40 (hereinafter sometimes simply referred to as "winding length") is preferably 20 m or more and 50 m or less. If the winding length is shorter than 20 m, the winding diameter DR becomes too small, resulting in poor tightness. On the other hand, if the winding length is longer than 50 m, the winding diameter DR becomes too large and the paper towel roll 40 becomes too tight, which may result in crushing or damage. The lower limit of the above winding length range is more preferably 23 m or more, and even more preferably 25 m or more. The upper limit of the above winding length range is more preferably 43 m or less, and even more preferably 35 m or less.

[0055] (roll width) The roll width W of the paper towel roll 40 is preferably 200 mm or more and 400 mm or less. If the roll width W is smaller than 200 mm, the tightness will be poor. On the other hand, if the roll width W is larger than 400 mm, the roll will be too tight, and the paper towel roll 40 may be crushed or damaged. The lower limit of the above range of the roll width W is more preferably 230 mm or more, and even more preferably 250 mm or more. The upper limit of the above range of the roll width W is more preferably 350 mm or less, and even more preferably 300 mm or less.

[0056] (winding density) The winding density of the paper towel roll 40 (hereinafter sometimes simply referred to as "winding density") is 0.15 m / cm 2 More than 0.60m / cm 2 The winding density is 0.15m / cm 2 If the winding density is set to less than 0.60 m / cm, the paper towel roll 40 becomes too soft and easily deformed. 2 If the winding density is greater (higher) than 0.25 m / cm, the paper towel roll 40 will be too hard and will be less soft. 2 It is preferable that the thickness is 0.30 m / cm or more. 2 The upper limit of the above range of winding density is preferably 0.55 m / cm. 2 Preferably, it is 0.43 m / cm or less. 2 More preferably, it is:

[0057] The winding density is expressed by the following formula (1). Winding density = (winding length × number of plies) ÷ (cross-sectional area of ​​paper towel roll 40) (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 portion of paper towel roll 40 at the winding diameter DR)−(cross-sectional area of ​​the portion of core outer diameter DI) (2) For example, if the winding length is 18 m, the winding diameter (DR) is 150 mm, and the core outer diameter (DI) is 44 mm, the winding density is (18 m × 2) ÷ {3.14 × (150 mm ÷ 2 ÷ 10)} 2 -3.14×(44mm÷2÷10) 2}=0.22m / cm 2 This becomes:

[0058] (Rolling softness) When evaluating the softness of the paper towel roll 40, the softness of the paper towel roll 40 when held in the hand can be evaluated by evaluating the "rolling softness" described below.

[0059] The winding softness of paper towel roll 40 (hereinafter sometimes simply referred to as "winding 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 paper towel roll 40 is defined as the height direction, and the direction perpendicular to the tangent to the circumference of paper towel roll 40 is defined as the radial direction.

[0060] First, the paper towel roll 40 is placed horizontally on the table of the testing machine so that the axial direction of the paper towel roll 40 is horizontal. Then, the KES-G5 compression element (contact area 2.0 cm) is placed at the center of the axial direction of the paper towel roll 40. 2 ) is pressed from above in the radial direction at a speed of 10 mm / min. The pressure with which the compressing element presses the roll is 5 gf / cm 2 The indentation depth when the pressure is 150gf / cm 2 The indentation depth at this time is defined as Tm, and (Tm - T0) is measured as the "winding softness." Next, the paper towel roll 40 is rotated 90 degrees circumferentially around its central axis as the axis of rotation, and the indentation depths Tm and T0 are measured in the same manner as above, and the difference between Tm and T0 (Tm - T0) is determined. Measurements are performed twice (at two angles) for each paper towel roll 40 as described above. That is, for three paper towel rolls 40, each is measured twice, and the average of the six measurement results (= two times per roll x 3 rolls) is used as the final winding softness.

[0061] The winding softness of the paper towel roll 40 is 1.2 mm or more and 4.0 mm or less. If the winding softness of the paper towel roll 40 is less than 1.2 mm, it will be too stiff and will have poor softness. On the other hand, if the winding softness of the paper towel roll 40 is more than 4.0 mm, it will be too soft and will be prone to deformation. The lower limit of the above range of winding softness is preferably 1.4 mm or more, and more preferably 1.6 mm or more. The upper limit of the above range of winding softness is preferably 3.6 mm or less, and more preferably 3.0 mm or less.

[0062] (roll weight) The roll weight of the paper towel roll 40 including the core (paper tube) 41 per 280 mm of roll width W (hereinafter, simply referred to as the "roll weight <with core>") is preferably 200 g or more and 630 g or less. If the roll weight <with core> is less than 200 g, the winding diameter DR becomes too small, resulting in poor tightness. On the other hand, if the roll weight <with core> is greater than 630 g, the winding diameter DR becomes too large, resulting in an excessively tight winding, which may result in crushing or damage to the paper towel roll 40. The lower limit of the above range of the roll weight <with core> is more preferably 250 g or more, and even more preferably 300 g or more. The upper limit of the above range of the roll weight <with core> is more preferably 580 g or less, and even more preferably 420 g or less. The roll weight <with core> is measured by measuring three paper towel rolls 40 and averaging the measurement results.

[0063] The roll weight of the paper towel roll 40 per 280 mm of roll width W, excluding the core 41 (core that is a paper tube) (hereinafter, sometimes simply referred to as the "roll weight <without core>"), is preferably 190 g or more and 620 g or less. If the roll weight <without core> is less than 190 g, the winding diameter DR becomes too small, resulting in poor tightness. On the other hand, if the roll weight <without core> is greater than 620 g, the winding diameter DR becomes too large, resulting in an excessively tight fit, which may result in crushing or damage to the paper towel roll 40. The lower limit of the above range of the roll weight <without core> is more preferably 240 g or more, and even more preferably 290 g or more. The upper limit of the above range of the roll weight <without core> is more preferably 570 g or less, and even more preferably 410 g or less. The roll weight <without core> is measured by measuring three paper towel rolls 40 and their cores 41, and averaging the measurement results.

[0064] (roll density) The roll density of the paper towel roll 40 (hereinafter sometimes simply referred to as "roll density") is 0.03 g / cm 3 More than 0.20g / cm 3 The roll density is preferably 0.03 g / cm or less. 3 If the roll density is less than 0.20 g / cm, the paper towel roll 40 becomes too soft and easily deforms. 3 If the roll density is greater than 0.04 g / cm, the paper towel roll 40 will be too hard and will lack softness. 3 More preferably, it is 0.05 g / cm or more. 3 The upper limit of the above range of the roll density is preferably 0.15 g / cm. 3 More preferably, it is 0.10 g / cm or less. 3 It is more preferable that:

[0065] The roll density of the paper towel roll 40 is expressed as (roll weight of the paper towel roll 40 <without core>) / (volume of the paper towel roll 40), and is calculated by the following formula (3). Roll density = roll weight ÷ [{(cross-sectional area of ​​the roll diameter DR (outer diameter) of the paper towel roll 40) - (cross-sectional area of ​​the core outer diameter DI)} × roll width W (calculated based on 280 mm)] (3) For example, if the roll weight (without core) per roll width W280mm is 222g, the reel diameter (DR) is 150mm, and the core outer diameter (DI) is 44mm, then the roll density = 222g ÷ {(3.14 × (150mm ÷ 2 ÷ 10)} 2 -3.14×(44mm÷2÷10) 2 )×(280mm÷10)}=0.05g / cm 3 This becomes:

[0066] <Paper towels> The paper towel 40a is preferably an embossed sheet made up of two or more layers. The number of layers of the paper towel 40a is more preferably 2 to 3, and even more preferably 2 layers.

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

[0068] The paper thickness was measured using the following method. A thickness gauge (Ozaki Seisakusho's "PEACOCK" dial thickness gauge) was used. The measurement conditions were a measurement load of 3.7 kPa and a probe diameter of 30 mm. The sample was placed between the probe and the measuring table, and the gauge reading was taken when the probe was lowered at a speed of 1 mm per second or less. To measure the paper thickness per 10 ply, 10 ply sheets (five sets of two-ply sheets) were stacked and measured, and the measurement results were averaged 10 times. For three-ply sheets, 9 ply sheets (three sets of three-ply sheets) were stacked and measured, and the thickness per ply was calculated from the measurement results and converted to 10-ply. The paper thickness was measured at five different points in the MD (machine direction) of the sheet, and five points shifted from these five points in the CD (cross direction), for a total of 10 points. It is important to measure the paper thickness at 10 different points, but the exact position is not important.

[0069] (Basic weight) The basis weight of the product ply of the paper towel 40a is measured in accordance with JIS P 8124 and is 33 g / m 2 More than 65g / m 2 The basis weight of the product ply of the paper towel 40a is preferably 33 g / m or less. 2 On the other hand, when the basis weight of the product PLY of the paper towel 40a is 65 g / m 2 If it is larger than this, the roll density will be high and the winding softness will be hard. The lower limit of the above range of the basis weight of the product PLY of the paper towel 40a is 38 g / m 2 More preferably, it is 40 g / m or more. 2 The upper limit of the above range of the basis weight of the product ply of the paper towel 40a is 60 g / m 2 More preferably, it is 55 g / m or less. 2 It is more preferable that:

[0070] (specific volume) The specific volume of 40a paper towels is 12cm 3 / g or more 18cm 3The specific volume of the paper towel 40a is preferably 12 cm 3 On the other hand, if the specific volume of the paper towel 40a is set to 18 cm / g or less, the absorbency will be poor. 3 If the specific volume is greater than / g, the roll softness will be hard. The specific volume of the paper towel 40a is calculated by dividing the paper thickness of a predetermined number of plies (e.g., product ply) of the paper towel 40a by the basis weight of the predetermined number of plies, and is expressed as a volume cm per unit g. 3 The lower limit of the above range of the specific volume of the paper towel 40a is 13 cm 3 / g or more is more preferable, and 14cm 3 The upper limit of the above range of the specific volume of the paper towel 40a is 17 cm 3 / g or less is more preferable, and 16cm 3 It is more preferable that the saturation coefficient is 1 / g or less.

[0071] (Tensile strength DMDT) The tensile strength DMDT in the machine direction (MD) of the product ply of paper towel 40a when dry (hereinafter sometimes referred to as "tensile strength DMDT of product ply") according to 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 of tensile strength DMDT of product ply 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 of tensile strength DMDT of product ply 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) of the product ply of paper towel 40a when dry (hereinafter sometimes referred to as "tensile strength DCDT of product ply") according to 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 of tensile strength DCDT of the product ply 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 of tensile strength DCDT of the product ply 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 and DCDT of the product PLY of the paper towel 40a are measured in accordance with 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 is measured after being maintained in an equilibrium state under the temperature and humidity conditions specified in JIS P 8111 (23±1°C, 50±2% RH) under the conditions that the width direction of the test piece (the direction perpendicular to the tensile direction of the Tensilon universal testing machine) is 25 mm, the distance between the grips is 100 mm, and the tensile speed is 50 mm / min.

[0074] If the tensile strength DMDT, DCDT is lower than 6.0 N / 25 mm, the paper towel roll 40 becomes easily damaged and deformed. On the other hand, if the tensile strength DMDT, DCDT is higher than 14.0 N / 25 mm, the softness of the paper towel 40a sheet becomes hard.

[0075] (Water absorption amount) Water absorption per unit area of ​​paper towel 40a (g / m 2 ) is 290g / m 2 More than 580g / m 2 The water absorption per unit area is 290g / m 2 On the other hand, if the water absorption per unit area is less than 580g / m 2If it is larger than this, the roll softness will be hard. The lower limit of the above range of water absorption per unit area is 340 g / m 2 It is preferable that the weight is 400 g / m or more. 2 The upper limit of the above range of water absorption per unit area is 520 g / m or more. 2 More preferably, it is 470 g / m or less. 2 It is more preferable that:

[0076] The water absorption per unit mass (g / g) of the paper towel 40a is preferably 3.0 g / g or more and 12.0 g / g or less. If the water absorption per unit mass is less than 3.0 g / g, the water absorbency will be poor. On the other hand, if the water absorption per unit mass is greater than 12.0 g / g, the roll softness will be too hard. The lower limit of the above range of water absorption 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 of water absorption 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 paper towel 40a in a dry state was measured according to the following method. First, two plies of paper towel were taken and cut using a square template with each piece measuring 7.6 cm (3 inches) to prepare a rectangular test piece 200 (see FIG. 5) with each side measuring 7.6 cm. The weight of the test piece 200 before water absorption was measured using an electronic balance. The test piece 200 was set in a holder 220 (a jig that fixes three points of the test piece, made of a metal that does not absorb water).

[0078] Next, distilled water is poured into a commercially available tray to a depth of 2 cm, and the test piece 200 set in the holder 220 is immersed in the distilled water for 2 minutes. After immersion for 2 minutes, the test piece 200 and the holder 220 are removed from the distilled water, and as shown in FIG. 5, a strip 210 is attached to one corner 200d of the test piece 200. The strip 210 is made by peeling the same paper towel as the two plies of paper towel to be measured into one ply, cutting this paper towel into a size of 2 mm x 15 mm, and attaching it to a portion of the test piece 200 6 mm from the corner 200d toward the center. Next, the holder 220 and the test piece 200 are hung from a rod placed in an empty water tank with the corner 200a opposite the corner 200d facing up, and the lid of the water tank is closed and left for 15 minutes.

[0079] Thereafter, the holder 220 and the test piece 200 are taken out of the water tank, the band 210 and the holder 220 are removed, and the weight of the test piece 200 is measured using an electronic balance. From the change in weight of the test piece 200 before and after immersion in distilled water, the amount of distilled water absorbed per unit area of ​​the test piece 200 (g of water / sheet m 2 , 1m 2 Hit. Abbreviated as g / m 2 ) is calculated. Furthermore, the water absorption per unit area (g of water / sheet m 2 ) by the basis weight of the product ply of the test piece 200 to obtain the water absorption per unit area (water g / sheet m 2 ) / basis weight (sheet g / sheet m 2 ) = Water absorption per unit weight (g of water / g of sheet, per 1g. Abbreviated as g / g). Measurements are carried out five times for each sample, and the average value is used.

[0080] For three-ply paper towels, it is preferable to measure using the same procedure as for two-ply. This measurement is performed according to JIS P 8111 at a temperature of 23±1°C and humidity of 50±2%. The distilled water is kept at 23±1°C.

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

[0082] The embossed area ratio is determined by measuring the top of the embossment on the surface of the paper towel 40a (the part closest to the surface) with a ruler, tape measure, etc., or if the embossment is difficult to see with the naked eye, with a microscope VR-3000 (manufactured by Keyence Corporation), and converting the result into a ratio per unit area (area ratio).

[0083] The above area ratio is determined by measuring the total length of all embossments that are 0.1 mm to 4 mm thick and 5 mm or longer inside a rectangle E that includes one embossing pattern as shown in Figure 6, and then calculating the embossed area by multiplying the total length (mm) by the width (mm), and then calculating (embossed area / area of ​​rectangle E) x 100 (%). Note that if it is difficult to calculate the embossed area ratio, the area ratio of the convex portions of the embossing roll used in embossing can be considered to be the area of ​​one sheet of paper towel 40a.

[0084] The size of one side of this rectangle E can be changed as appropriate depending on the size of the embossed pattern. Furthermore, if a rectangle that encompasses all of the embossed patterns includes an embossed pattern adjacent to an embossed pattern included in the rectangle, the length of the adjacent embossed pattern is also measured and included in the total length. If the size of one side of rectangle E cannot be clearly determined depending on the embossed pattern, the size of rectangle E is set to 10 x 10 cm, and the total length of the embossments included in this rectangle E is measured. The total length is determined by measuring using a ruler, tape measure, etc. using the method described above. Furthermore, if it is difficult to visually inspect the embossing, it may be measured using a general microscope.

[0085] (Drop of second exterior film) As described above, when highly absorbent, soft paper towel rolls 40 are packed in three or more rows in the width direction, the paper towel rolls 40 inside tend to move around, making it difficult to maintain tightness, and there is a risk of the paper towel rolls 40 rubbing against each other and becoming damaged. On the other hand, if the packaging is too tight in an attempt to ensure tightness, the paper towel rolls 40 inside may become crushed and deformed, making it impossible to maintain quality. Therefore, by specifying the degree of sagging of the second exterior film 50, it is possible to ensure tightness while preventing damage and deformation of the paper towel rolls 40.

[0086] The degree of sagging of the second exterior film 50 is measured as shown in Figure 7. First, the paper towel package 20 is placed on a table or the like so that the axial direction of the paper towel roll 40 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 adjacent paper towel rolls 40 in the width direction (paper towel rolls 40A and 40B in Figure 7) so that the plate surface of the first ruler S is in contact with the second exterior film 50. The surface (line) of the first ruler S that is in contact with the second exterior film 50 at this time is designated as the reference line SL.

[0087] Next, a second ruler (ruler) R is placed on approximately the center between paper towel rolls 40A and 40B of second exterior film 50, which is wrapped across adjacent paper towel rolls 40A and 40B in the width direction. Second ruler R is a stainless steel ruler with a mass of 64 g, a thickness of 1.0 mm, a width of 25 mm, and a scale length of 300 mm. Second ruler R is placed on second exterior film 50 approximately in the center between paper towel rolls 40A and 40B so that the width direction Rw of second ruler R is parallel to the end face of paper towel roll 40 (width direction (Y direction)). At this time, the distance (drop amount) D from reference line SL to the tip (bottom end) of second ruler R is measured.

[0088] The distance D from the reference line SL to the tip of the second ruler R is measured on the surface side of one paper towel package 20 at two positions that divide the height h (axial length; see FIG. 2) of the paper towel package 20 into approximately three equal parts. In the case of three rolls, the two positions are measured between each of the three rows of paper towel rolls 40 (four positions in total, indicated by the symbol p in FIG. 2). In the case of four rolls, the two positions are measured between each of the four rows of paper towel rolls 40 (six positions in total, indicated by the symbol p in FIG. 3(a)). In the case of five rolls, the two positions are measured between each of the five rows of paper towel rolls 40 (eight positions in total, indicated by the symbol p in FIG. 3(b)). In other words, the number of measurement positions is calculated by the formula: (two positions axially spaced apart) × (number of rows - 1). The distance D measured at each position is then averaged and used as the amount of sagging of the second exterior film 50. As the first ruler S and the second ruler R, for example, the "Silver Ruler" manufactured by Shinwa Measuring Co., Ltd. can be used.

[0089] When a stainless steel ruler (second ruler R) measuring 64 g, 1.0 mm thick, 25 mm wide, and 300 mm long is placed on the second exterior film 50 wrapped across adjacent paper towel rolls 40, the amount of sagging of the second exterior film 50 (hereinafter simply referred to as the "sagging amount of the second exterior film 50") is measured and placed on the second exterior film 50 wrapped across adjacent paper towel rolls 40 measured in this manner. The amount of sagging of the second exterior film 50 is 4 mm or more and 20 mm or less. If the sagging amount of the second exterior film 50 is less than 4 mm, the wrapping becomes too tight, causing the paper towel roll 40 to be crushed and deformed. On the other hand, if the sagging amount of the second exterior film 50 is greater than 20 mm, the wrapping becomes less tight. The lower limit of the above range of the sagging amount of the second exterior film 50 is preferably 6 mm or more, and more preferably 7 mm or more. The upper limit of the above range of the sagging amount of the second exterior film 50 is preferably 16 mm or less, and more preferably 12 mm or less.

[0090] (Relationship between the amount of sagging of the second outer film and winding softness) The value A, which is expressed by the following formula (4) and shows the relationship between the amount of sagging of the second exterior film 50 and the winding softness of the paper towel roll 40, is preferably 1.7 or more and 14.0 or less. Value A = (sagging amount of second exterior film 50 (mm)) / (rolling softness of paper towel roll 40 (mm)) (4) If the value A is less than 1.7, the paper towel roll 40 will be too soft and will be crushed and deformed. On the other hand, if the value A is greater than 14.0, tightness cannot be ensured. The lower limit of the range of the value A is more preferably 2.5 or more, and even more preferably 3.0 or more. The upper limit of the range of the value A is more preferably 8.0 or less, and even more preferably 5.5 or less.

[0091] (Relationship between the amount of sagging of the second exterior film and the winding density) The value B, which is expressed by the following formula (5) and shows the relationship between the amount of sagging of the second exterior film 50 and the winding density of the paper towel roll 40, is preferably 10 or more and 60 or less. Value B = (drop amount of second exterior film 50 (mm)) / (winding density of paper towel roll 40 (m / cm 2 ))···(5) If the value B is less than 10, the paper towel roll 40 will be crushed and deformed. On the other hand, if the value B is greater than 19, tightness cannot be ensured. The lower limit of the range of the value B is more preferably 15 or more, and even more preferably 25 or more. The upper limit of the range of the value B is more preferably 45 or less, and even more preferably 35 or less.

[0092] Although the present invention has been described above based on the above embodiment, the present invention is not limited to the content 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, operational techniques, etc. made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. [Example]

[0093] 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.

[0094] (Examples 1 to 18 and Comparative Examples 1 to 8) Paper towel package packages of Examples 1 to 18 and Comparative Examples 1 to 8 were produced under the conditions shown in Tables 1 to 3. Each paper towel package was evaluated in the following five ways (evaluation of "tightness of outer packaging film," evaluation of "roll deformation and scratches," evaluation of "water absorbency," evaluation of "sheet softness," and evaluation of "roll softness"). Each evaluation was performed after maintaining the package in an equilibrium state under the temperature and humidity conditions specified in JIS P8111 (23±1°C, 50±2% RH). Furthermore, each parameter other than the evaluations below was measured according to the standards or measurement methods described above.

[0095] (Tightness of outer film) The "tightness of the outer packaging film" was evaluated by 20 monitors through a sensory evaluation, in which they selected "good" or "bad" for the overall tightness of the packaging of the first and second outer packaging films. The evaluation was based on the following criteria: 5 points: 18 or more people answered "good" 4 points: 14 to 17 people answered "Good" 3 points: 10 to 13 people answered "good" 2 points: 7 to 9 people answered "Good" 1 point: 6 or fewer people answered "good"

[0096] (Roll deformation, scratches) The evaluation of "roll deformation and scratches" was a sensory evaluation by 20 monitors, who selected "yes" or "no" for any deformation or scratches on the paper towel roll when opened and used. The evaluation was based on 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"

[0097] (Water absorption) The "water absorbency" was evaluated by measuring the amount of water absorbed per unit area, and was evaluated according to the following criteria. 5 points: Water absorption per unit area is 400g / m 2 End 4 points: Water absorption per unit area is 340g / m 2 More than 400g / m 2 less than 3 points: Water absorption per unit area is 290g / m 2 More than 340g / m 2 less than 2 points: Water absorption per unit area is 275g / m 2 More than 290g / m 2 less than 1 point: Water absorption per unit area is 275g / m 2 less than

[0098] (Softness of the seat) The evaluation of "sheet softness" was a sensory evaluation by 20 monitors, who selected "soft" or "hard" for the softness of the sheet when using the paper towel. The evaluation was based on the following criteria: 5 points: 18 or more people say "soft" 4 points: 14 to 17 people think it's "soft" 3 points: 10 to 13 people say "soft" 2 points: 7 to 9 people answered "soft" 1 point: 6 or fewer people say "soft"

[0099] (Softness of the roll) The "roll softness" was evaluated by measuring the winding softness, and was evaluated according to the following criteria. 5 points: The measurement result of the winding softness is 1.6 mm or more 4 points: The measurement result of the winding softness is 1.4 mm or more and less than 1.6 mm 3 points: The measurement result of the winding softness is 1.2 mm or more and less than 1.4 mm 2 points: The measurement result of the winding softness is 1.0 mm or more but less than 1.2 mm 1 point: The measurement result of the winding softness is less than 1.0 mm

[0100] The results obtained are shown in Tables 1 to 3.

[0101] [Table 1]

[0102] [Table 2]

[0103] [Table 3]

[0104] As can be seen from Tables 1 to 3, according to the present disclosure, by appropriately setting the winding density of the paper towel roll, the winding softness of the paper towel roll, the amount of sagging of the second outer film, the amount of water absorption per unit area of ​​the paper towel, the thickness of the first outer film, and the weight of the paper towel package, it is possible to provide a paper towel package that maintains tightness and quality and can be stored hygienically, even when multiple paper towel packages, each of which is made by packaging multiple paper towel rolls together, are further packaged together in an outer film. [Explanation of symbols]

[0105] 10:Paper towel packaging 20:Paper towel packaging 30: First exterior film 30a: Heat seal section 30b: Gusset section 40, 40A, 40B: Paper towel rolls 40a: Paper towels 41: Core 50: Second exterior film

Claims

1. A paper towel package package in which a plurality of paper towel packages are packaged in a first outer film, The paper towel package is a package in which 3 to 5 rolls of paper towels are arranged linearly in a first direction intersecting the axial direction and caramel-wrapped in a second exterior film, and 2 to 5 rolls are arranged in a second direction intersecting both the axial direction and the first direction and wrapped in the first exterior film, the first exterior film has heat-sealed portions on both sides in the second direction, The winding density of the paper towel roll is 0.15 m / cm ２ 0.60m / cm or more ２ is as follows: The winding softness of the paper towel roll is 1.2 mm or more and 4.0 mm or less, When a stainless steel ruler 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 on the second exterior film wrapped across the adjacent paper towel rolls, the amount of sagging of the second exterior film is 4 mm or more and 20 mm or less, The water absorption capacity of the paper towel per unit area is 290 g / m ２ More than 580g / m ２ is as follows: The thickness of the first exterior film is 25 μm or more and 90 μm or less, The weight of the paper towel package is 1.8 kg or more and 12.5 kg or less. A paper towel package characterized by:

2. The first exterior film is a pillow package having gusset portions on both sides of the heat-sealed portion.

2. The paper towel wrapper package of claim 1.

3. The thickness of the paper towel is 2.0 mm / 10 ply or more and 5.0 mm / 10 ply or less.

3. The paper towel package of claim 1 or claim 2.

4. The diameter of the paper towel roll is 125 mm or more and 175 mm or less.

3. The paper towel package of claim 1 or claim 2.

5. The basis weight of the paper towel product ply is 33 g / m ２ 65g / m or more ２ is 3. The paper towel package of claim 1 or claim 2.

6. The water absorption amount per unit mass of the paper towel is 3.0 g / g or more and 12.0 g / g or less.

3. The paper towel package of claim 1 or claim 2.

7. The roll length of the paper towel roll is 20 m or more and 50 m or less.

3. The paper towel package of claim 1 or claim 2.

8. The weight of the paper towel roll per 280 mm width, excluding the core, is 190 g or more and 620 g or less.

3. The paper towel package of claim 1 or claim 2.

9. The roll density of the paper towel roll is 0.03 g / cm ３ 0.20g / cm or more ３ is 3. The paper towel package of claim 1 or claim 2.

10. The value represented by the formula: (sagging amount of the second exterior film) / (winding softness of the paper towel roll) is 1.7 or more and 14.0 or less.

3. The paper towel package of claim 1 or claim 2.

11. The value represented by the formula: (amount of sagging of the second exterior film) / (winding density of the paper towel roll) is 10 or more and 60 or less.

3. The paper towel package of claim 1 or claim 2.

12. The paper towel has an embossed pattern, The embossing area ratio of the embossing is 8% or more and 20% or less.

3. The paper towel package of claim 1 or claim 2.

13. The tensile strength DMDT in the MD direction of the paper towel product ply when dry according to JIS P 8113 is 6.0 N / 25 mm or more and 14.0 N / 25 mm or less.

3. The paper towel package of claim 1 or claim 2.

14. The tensile strength (DCDT) in the CD direction in a dry state based on JIS P 8113 of the paper towel product ply is 6.0 N / 25 mm or more and 14.0 N / 25 mm or less.

3. The paper towel package of claim 1 or claim 2.

15. The paper towel roll has a central cylindrical core, The apparent basis weight of the core is 280 g / m ２ 530g / m or more ２ is 3. The paper towel package of claim 1 or claim 2.

16. The paper towel roll has a central cylindrical core, The outer diameter of the core is 28 mm or more and 58 mm or less.

3. The paper towel package of claim 1 or claim 2.

17. The paper towel roll has a central cylindrical core, The core comprises LBKP (bleached hardwood kraft pulp).

3. The paper towel package of claim 1 or claim 2.

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