Toilet roll package

Abstract

To provide a toilet roll package which hardly causes deterioration of beautification due to crushing of an internal toilet roll or the like, has less deflection and breakage of craft wrapping paper, is inexpensive, and is easily processed and transported.SOLUTION: A toilet roll package is formed by defining a package formed by arranging film packages obtained by packaging one or more toilet rolls as a packaged object, and packaging it using craft wrapping paper. The toilet roll has a wound length equal to or larger than a predetermined value, a winding density of 1.47 m / cm2 or more and 1.80 m / cm2 or less, a basis weight of the kraft wrapping paper of 70 g / m2 or more and 130 g / m2 or less, a vertical Clark hardness of 116 cm3 / 100 or more and 291 cm3 / 100 or less, a horizontal Clark hardness of 52 cm3 / 100 or more and 138 cm3 / 100 or less, and a difference between a circumferential length in the longitudinal direction of the package and a circumferential length in the longitudinal direction of the packaged object of -50 mm or more and 50 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a toilet roll package in which a toilet roll wrapped in a film is wrapped in kraft wrapping paper instead of cardboard. [Background technology]

[0002] The majority of toilet rolls currently on the market are sold in packages where multiple rolls are stacked side by side and wrapped in film, and these toilet roll packages are often packed into cardboard cases for transport.

[0003] However, due to growing awareness of reducing environmental impact, the cost reduction of cardboard cases, and the ease of disposal after use, kraft packaging paper is often used instead of cardboard.

[0004] For example, Patent Document 1, an example of a prior art document for toilet roll packaging, discloses a household roll paper packaging having a main body made of wrapping paper with a paper mass ratio of more than 50% by mass, and having a front body, a back body facing the front body, a top body and a bottom body connected to the front body and the back body, and side bodies connected to each side, and a handle formed by adhering a flexible strip-shaped or string-shaped material near the top body of each side body, and the main body having a pair of first perforations extending from the top body to the bottom body near the handle and on both sides of the front body and the back body, sandwiching the adhesive part of the handle to the main body, a second perforation located between at least the pair of first perforations, and a third perforation extending from at least one of the pair of first perforations in one side body, via at least one of the front body and the back body, to at least one of the pair of first perforations in the other side body. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-160814 Summary of the Invention [Problem to be solved by the invention]

[0006] However, kraft wrapping paper has low rigidity, and when ordinary toilet rolls (hereinafter also referred to as ordinary rolls) are stacked, there is a problem in that the internal toilet roll packaging is crushed. Therefore, one possible measure to avoid crushing the roll is to wrap the toilet roll (hereinafter also referred to as a long roll) in a film package that is tightly wound and therefore less likely to be crushed, and is made of long toilet paper.

[0007] However, when lifting the package with the arm 300 of a forklift or the like as shown in Fig. 3, in the case of the normal roll package 100, which is a package of multiple normal film packages 111, which are normal rolls 110 wrapped in film as shown in Fig. 3(a), the wrapping paper only sags slightly, but in the case of the long roll package 200, which is a package of multiple long film packages 211, which are long rolls 210 wrapped in film as shown in Fig. 3(b), the long rolls 210 are heavy, and the wrapping paper sags when lifted with the arm 300. This has caused problems such as the package being difficult to hold and transport. Furthermore, as a result of the bending, the kraft wrapping paper may not be able to withstand the weight of the film wrapping of the long roll 210 and may tear.

[0008] Furthermore, the bending can cause the product (long film packaging 211) to shift, resulting in products rubbing against each other, causing the ink on the film to peel off or the toilet paper on the surface of the roll to tear, thereby reducing the aesthetic appeal of the product. On the other hand, simply increasing the basis weight and strength of kraft wrapping paper would be costly and difficult to process.

[0009] The present invention has been made in view of the above circumstances, and aims to provide a toilet roll package that is less likely to cause deterioration in aesthetic appeal due to crushing of the toilet roll inside, peeling of ink from the film, or tearing of the toilet paper on the surface of the roll, and that is less likely to cause bending or tearing of the kraft wrapping paper, and that is inexpensive and easy to process and transport. [Means for solving the problem]

[0010] The inventors conducted extensive research and found that, in a toilet roll package in which at least one toilet roll (made by winding toilet paper into a roll) is wrapped in film and the film packages are arranged perpendicular to the axial direction of the toilet roll and / or stacked parallel to the axial direction, the packaged items are wrapped in kraft wrapping paper, and the toilet roll is wrapped in film packaging. By setting the winding length and winding density of the toilet roll within predetermined numerical ranges, setting the basis weight per product ply of the kraft wrapping paper and the Clark stiffness in the longitudinal and transverse directions within predetermined numerical ranges, and further setting the difference between the longitudinal circumference of the package and the longitudinal circumference of the packaged item within predetermined numerical ranges, the toilet roll inside is less likely to be crushed, ink peeling from the film, or the aesthetic appeal of the toilet paper on the roll surface is less likely to deteriorate, and the kraft wrapping paper is less likely to bend or tear, and the toilet roll package is less likely to be damaged, easy to process, and transport, and the kraft wrapping paper is less likely to sag or tear. That is, the present invention provides the following.

[0011] (1) The first aspect of the present invention is a toilet roll package in which at least one toilet roll, which is made by winding toilet paper into a roll, is wrapped in a film, and the film packages are arranged perpendicular to the axial direction of the toilet roll and / or stacked parallel to the axial direction, and the packaged item is wrapped in kraft wrapping paper, and the toilet roll has a winding length equal to or greater than the value calculated by (150 / number of plies of the toilet paper) and a winding density of 1.47 m / cm 2 More than 1.80m / cm 2The kraft wrapping paper has a basis weight per product ply of 70 g / m or less. 2 More than 130g / m 2 The vertical Clark stiffness of the kraft wrapping paper based on JIS P 8143 is 116 cm or less. 3 / 100 or more 291cm 3 / 100 or less, horizontal Clark fear is 52cm 3 / 100 or more 138cm 3 / 100 or less, and the difference Δ(LPA-LPB) between the longitudinal circumference of the package (LPA) and the longitudinal circumference of the packaged item (LPB) is -50 mm or more and 50 mm or less.

[0012] (2) A second aspect of the present invention is the toilet roll packaging described in (1), characterized in that the difference Δ(SPA-SPB) between the lateral circumference of the packaging (SPA) and the lateral circumference of the packaged item (SPB) is between -80 mm and 10 mm.

[0013] (3) A third aspect of the present invention is the toilet roll packaging according to (1), characterized in that the kraft wrapping paper has a tensile strength (DMDT) in the machine direction per product ply in a dry state according to JIS P 8113 of 6.9 kN / m or more and 15.3 kN / m or less.

[0014] (4) A fourth aspect of the present invention is the toilet roll packaging described in (1), characterized in that the tensile strength (DCDT) of the kraft wrapping paper in the CD direction per product ply in a dry state based on JIS P 8113 is 3.1 kN / m or more and 5.7 kN / m or less.

[0015] (5) A fifth aspect of the present invention is the toilet roll packaging described in (1), characterized in that the thickness of the kraft wrapping paper per product ply when a load of 100 kPa is applied is 106 μm or more and 182 μm or less.

[0016] (6) A sixth aspect of the present invention is the toilet roll packaging according to (1), characterized in that the roll weight of the toilet roll is 194 g or more and 295 g or less.

[0017] (7) A seventh aspect of the present invention is the toilet roll packaging according to (1), wherein the roll density of the toilet roll is 0.18 g / cm 3 More than 0.28g / cm 3 It is characterized by the following:

[0018] (8) The eighth aspect of the present invention is the toilet roll packaging according to (1), wherein the basis weight per ply of the toilet paper is 12.0 g / m 2 More than 18.2g / m 2 It is characterized by the following:

[0019] (9) The ninth aspect of the present invention is the toilet roll packaging described in (1), characterized in that the total number of toilet rolls contained in the packaged item is 12 or more and 84 or less.

[0020] (10) The tenth aspect of the present invention is the toilet roll packaging described in (1), characterized in that the packaging form of the packaging is caramel packaging, the folded portion of the kraft wrapping paper is sealed with tape, and the ratio of the width of the tape to the height of the packaging is 20% or more and 40% or less.

[0021] (11) The eleventh aspect of the present invention is the toilet roll packaging described in (1), characterized in that the value calculated by [(longitudinal circumference of the packaged item / longitudinal circumference of the packaging body) / paper thickness per product ply of the kraft packaging paper] is 0.55 or more and 0.94 or less.

[0022] (12) A twelfth aspect of the present invention is the toilet roll packaging described in (1), characterized in that the value calculated by [(perimeter of the packaged item in the short side direction / perimeter of the packaging body in the short side direction) / paper thickness per product ply of the kraft packaging paper] is 0.53 or more and 0.92 or less. [Effects of the Invention]

[0023] According to the present invention, it is possible to provide a toilet roll package that is less likely to suffer from the deterioration of aesthetic appeal due to the toilet roll inside being crushed, the ink peeling off the film, or the toilet paper on the surface of the roll being torn, and in which the kraft wrapping paper is less likely to bend or tear, and that is inexpensive and easy to process and transport. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view showing the appearance of a toilet roll packaging according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a perspective view showing the appearance of a toilet roll packaged in the toilet roll package of FIG. 1. [Figure 3] FIG. 1 is a schematic diagram showing how packages containing regular and long toilet rolls, manufactured using conventional technology, are lifted by the arms of a forklift or the like. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, a mode for carrying out the present invention (hereinafter simply referred to as "the present embodiment") will be described in detail. The following present embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out by appropriately modifying it within the scope of its gist.

[0026] In the drawings, the same elements are denoted by the same reference numerals, and redundant explanations will be omitted. Furthermore, unless otherwise specified, the positional relationships, such as up, down, left, and right, are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to those shown in the drawings.

[0027] <Toilet roll packaging> A toilet roll packaging (hereinafter simply referred to as "packaging") 1 according to one embodiment of the present invention is a packaged item in which at least one toilet roll 20, made of toilet paper 20x (hereinafter simply referred to as "sheet") wound into a roll, is wrapped in film 10 and the film packaging 11 is arranged perpendicular to the axial direction of the toilet roll 20 and / or stacked parallel to the axial direction, and the packaged item is then wrapped in kraft wrapping paper 3. Note that the packaged item in this case refers to a toilet roll assembly (hereinafter simply referred to as "assembly") 2, which also includes the film packaging 11 (the assembly 2 and film packaging 11 will be described later).

[0028] The lower limit of the longitudinal circumference (LPA) of the package 1 is preferably 1002 mm or more, more preferably 1024 mm or more, and even more preferably 1040 mm or more. The upper limit is preferably 2482 mm or less, more preferably 2426 mm or less, and even more preferably 2370 mm or less. If the circumference of the packaged item (toilet roll assembly 2) does not change, and the longitudinal circumference (LPA) is less than 1002 mm, the packaging will be too tight, causing the core of the toilet roll 20 to be crushed and the roll to be deformed, resulting in poor aesthetic appeal. The kraft wrapping paper 3 will also be easily torn. If the circumference of the packaged item (toilet roll assembly 2) does not change, and the longitudinal circumference (LPA) is more than 2482 mm, the toilet roll 20 will be more likely to move within the package 1, causing ink peeling and roll tearing, resulting in poor aesthetic appeal.

[0029] Furthermore, the minimum limit of the short-side circumference (SPA) of the package 1 is preferably 768 mm or more, more preferably 780 mm or more, and even more preferably 796 mm or more. The maximum limit is preferably 1,458 mm or less, more preferably 1,426 mm or less, and even more preferably 1,394 mm or less. If the circumference of the packaged item (toilet roll assembly 2) remains constant, a short-side circumference (SPA) of less than 768 mm will result in the packaging being too tight, causing the core of the toilet roll 20 to be crushed or the roll to be deformed, resulting in poor aesthetic appeal. The kraft wrapping paper 3 will also be easily torn. If the circumference of the packaged item (toilet roll assembly 2) remains constant, a short-side circumference (SPA) of more than 1,458 mm will cause the toilet roll 20 to move more easily inside the package 1, resulting in ink peeling and roll tearing, resulting in poor aesthetic appeal. In this case, the longitudinal direction refers to the direction parallel to the X axis in Figure 1, and the transverse direction refers to the direction parallel to the Y axis. If the package 1 or the packaged item is approximately cubic and there is no distinction between the longitudinal and transverse sides, any direction will be considered the longitudinal and transverse directions.

[0030] (Kraft wrapping paper) The kraft wrapping paper 3 used to package the toilet roll packaging 1 according to one embodiment of the present invention is not particularly limited in terms of material, as long as it is kraft paper typically used to package daily necessities. The kraft wrapping paper 3 may be one ply or two plies (two plies), but for the following parameters, when the packaged item is packaged with one ply of kraft paper, each physical property is measured as one ply, and when the packaged item is packaged with two plies of kraft paper, each physical property is measured as two plies. "Per product ply" refers to a parameter measured based on the number of plies of kraft wrapping paper 3 used for packaging. In addition, all of the parameters of the kraft packaging paper 3 described below are values ​​when the kraft packaging paper 3 is conditioned at a room temperature of 23°C and a humidity of 50%.

[0031] The basis weight per product ply of kraft wrapping paper 3 is 70 g / m 2 More than 130g / m 2The basis weight per product ply is 70 g / m 2 If the basis weight per ply of the product is less than 130 g / m, the kraft wrapping paper 3 becomes easily torn. 2 If the folding width exceeds this value, the kraft wrapping paper 3 becomes difficult to fold along the intended crease, making it difficult to process. In addition, the manufacturing cost of the packaging body 1 also increases. The basis weight per product ply of kraft wrapping paper 3 has a lower limit of 80 g / m 2 It is preferable that the weight is 90 g / m or more. 2 The upper limit is more preferably 120 g / m or more. 2 Preferably, it is 110 g / m or less. 2 It is more preferable that the basis weight per product ply of the kraft wrapping paper 3 is measured in accordance with JIS P 8124.

[0032] In addition, the vertical Clark stiffness based on JIS P 8143 per product ply of kraft wrapping paper 3 is 116 cm 3 / 100 or more 291cm 3 / 100 or less. Furthermore, the horizontal Clark stiffness based on JIS P 8143 per product ply of kraft wrapping paper 3 is 52 cm 3 / 100 or more 138cm 3 / 100 or less. Vertical Clark's fear is 116cm 3 / 100 or less or horizontal Clark stiffness 52 cm 3 If it is less than / 100, the kraft wrapping paper 3 will be easily warped. The vertical Clark stiffness is 291 cm. 3 / 100 or more, or horizontal Clark fear is 138cm 3 If the thickness exceeds 100 / 100, it becomes difficult to fold Kraft wrapping paper 3 along the intended crease and it becomes difficult to process.

[0033] In addition, the vertical Clark stiffness based on JIS P 8143 per product ply of kraft wrapping paper 3 is 145 cm 3 / 100 or more is preferable, and 174cm 3 The upper limit is preferably 262 cm / 100 or more. 3 / 100 or less is preferable, and 233 cm 3 It is more preferable that the ratio is 1 / 100 or less. Furthermore, the horizontal Clark stiffness based on JIS P 8143 per product ply of kraft wrapping paper 3 is 66 cm 3 / 100 or more is preferable, and 80cm 3 It is more preferable that the upper limit is 124 cm / 100 or more. 3 / 100 or less is preferable, and 109cm 3 It is more preferable that the ratio is 1 / 100 or less. The Clark stiffness in each direction per product ply of the kraft wrapping paper 3 is measured in accordance with JIS P 8143.

[0034] (DMDT and DCDT) The dry machine direction tensile strength (DMDT) of the kraft wrapping paper 3 per product ply in the dry state according to JIS P 8113 is preferably 6.9 kN / m or more and 15.3 kN / m or less. The dry cross direction tensile strength (DCDT) of the kraft wrapping paper 3 per product ply in the dry state according to JIS P 8113 is preferably 3.1 kN / m or more and 5.7 kN / m or less. If the DMDT per product ply is less than 6.9 kN / m or the DCDT per product ply is less than 3.1 kN / m, the kraft wrapping paper 3 is prone to tearing. If the DMDT per product ply exceeds 15.3 kN / m or the DCDT per product ply exceeds 5.7 kN / m, the kraft wrapping paper 3 is difficult to fold at the intended crease and is difficult to process.

[0035] The lower limit of the DMDT per product ply is more preferably 8.3 kN / m or more, and even more preferably 9.7 kN / m or more, and the upper limit is more preferably 13.9 kN / m or less, and even more preferably 12.5 kN / m or less. The DCDT per product ply has a lower limit of preferably 3.5 kN / m or more, and more preferably 4.0 kN / m or more, and an upper limit of preferably 5.3 kN / m or less, and more preferably 4.8 kN / m or less. In this case, the MD direction is the manufacturing direction (also called the machine direction or flow direction) during the manufacturing of the kraft wrapping paper 3. The CD direction is the direction perpendicular to the MD direction (also called the cross direction or width direction). The DMDT and DCDT per product ply of the kraft wrapping paper 3 are both measured in accordance with JIS P 8113.

[0036] Furthermore, it is preferable that the thickness of the kraft wrapping paper 3 per product ply when a load of 100 kPa is applied is 106 μm or more and 182 μm or less. If the thickness per product ply is less than 106 μm, the kraft wrapping paper 3 becomes more prone to bending and tearing. If the thickness per product ply exceeds 182 μm, it becomes difficult to fold the kraft wrapping paper 3 at the intended crease, making it difficult to process.

[0037] The thickness of the kraft wrapping paper 3 per product ply when a load of 100 kPa is applied is preferably 119 μm or more, more preferably 131 μm or more, and more preferably 169 μm or less, more preferably 159 μm or less. The paper thickness per product ply of the kraft packaging paper 3 when a load of 100 kPa is applied is calculated by multiplying the paper thickness per ply measured in accordance with JIS P 8118 by the number of product plies.

[0038] (Toilet roll assembly) In a toilet roll packaging 1 according to one embodiment of the present invention, the number of toilet rolls 20 contained in the packaged item (toilet roll assembly 2) is preferably 12 or more and 84 or less. If the number is less than 12, the top surface area of ​​the packaged item (toilet roll assembly 2) will be smaller, and the load on each toilet roll 20 when stacked will be greater, making the rolls more likely to be crushed and resulting in poor aesthetic appeal. In addition, the amount of kraft wrapping paper 3 used to transport a certain amount will increase, resulting in higher costs. If the number exceeds 84, the weight will increase, making the kraft wrapping paper 3 more likely to tear. The circumference will also increase, making the roll more likely to bend. The lower limit of the number of toilet rolls 20 contained in the packaged item is more preferably 24 or more, and even more preferably 36 or more. The upper limit is more preferably 72 or less, and even more preferably 60 or less.

[0039] The lower limit of the longitudinal circumference (LPB) of the toilet roll assembly 2 is preferably 1052 mm or more, more preferably 1074 mm or more, and even more preferably 1090 mm or more. The upper limit is preferably 2432 mm or less, more preferably 2376 mm or less, and even more preferably 2320 mm or less. If the longitudinal circumference (LPB) is less than 1052 mm, the number of toilet rolls 20 contained in the packaged item will be reduced, resulting in an increase in the amount of kraft wrapping paper 3 used to transport a certain amount, and higher costs. Furthermore, the top surface area of ​​the packaged item (toilet roll assembly 2) will be reduced, and the load on each toilet roll 20 will increase when stacked, making the rolls more likely to be crushed and resulting in poor aesthetic appeal. If the longitudinal circumference (LPB) exceeds 2432 mm, the package 1 will be more likely to warp.

[0040] The minimum limit of the short-side circumference (SPB) of the toilet roll assembly 2 is preferably 848 mm or more, more preferably 860 mm or more, and even more preferably 876 mm or more. The maximum limit is preferably 1,760 mm or less, more preferably 1,728 mm or less, and even more preferably 1,712 mm or less. If the short-side circumference (SPB) is less than 848 mm, the number of toilet rolls 20 contained in the packaged item will be reduced, resulting in an increase in the amount of kraft wrapping paper 3 used to transport a certain amount, and higher costs. Furthermore, the top surface area of ​​the packaged item (toilet roll assembly 2) will be reduced, and the load on each toilet roll 20 will increase when stacked, making the rolls more likely to be crushed and resulting in poor aesthetic appeal. If the short-side circumference (SPB) exceeds 1,760 mm, the package 1 will be more likely to warp. The circumferential length of the toilet roll assembly 2 in each direction is calculated using the following formula. (Reel diameter DR x (number of rolls in the longitudinal direction or number of rolls in the transverse direction) x 2 sides) + (roll width x number of rolls in the height direction x 2 sides)

[0041] Furthermore, the difference Δ(LPA-LPB) between the longitudinal circumference (LPA) of the package 1 and the longitudinal circumference (LPB) of the packaged item (toilet roll assembly 2) is between -50 mm and 50 mm. If the difference Δ(LPA-LPB) is less than -50 mm, the packaging will be too tight, causing the core of the toilet roll 20 to be crushed or the roll to be deformed, resulting in poor aesthetic appeal. If the difference Δ(LPA-LPB) exceeds 50 mm, the package 1 will be more likely to sag overall. The difference Δ(LPA-LPB) between the longitudinal circumference (LPA) of the package 1 and the longitudinal circumference (LPB) of the packaged article (toilet roll assembly 2) is preferably −30 mm or more, more preferably −10 mm or more, and is preferably 30 mm or less, more preferably 10 mm or less, inclusive.

[0042] Furthermore, the difference Δ(SPA - SPB) between the lateral circumference (SPA) of the packaging body 1 and the lateral circumference (SPB) of the packaged item (toilet roll assembly 2) is preferably between -80 mm and 10 mm. If the difference Δ(SPA - SPB) is less than -80 mm, the packaging will be too tight, causing the core of the toilet roll 20 to be crushed or the roll to be deformed, resulting in poor aesthetic appeal. The kraft wrapping paper 3 will also be more likely to tear. If the difference Δ(SPA - SPB) is more than 10 mm, the packaging body 1 will be more likely to sag overall. The difference Δ(SPA-SPB) between the lateral circumference (SPA) of the package 1 and the lateral circumference (SPB) of the packaged article (toilet roll assembly 2) is preferably −70 mm or more, more preferably −60 mm or more, and more preferably −15 mm or less, and more preferably −40 mm or less.

[0043] The value calculated by [(longitudinal circumference of packaged article (toilet roll assembly 2) / longitudinal circumference of package 1) / paper thickness per product ply of kraft wrapping paper 3] is preferably 0.55 or more and 0.94 or less. If the value is less than 0.55, the package 1 will be prone to sagging overall. If the value exceeds 0.94, the packaging will be too tight, causing the core of the toilet roll 20 to be crushed or the roll to be deformed, resulting in poor aesthetic appeal. In addition, the kraft wrapping paper 3 will be prone to tearing. The value calculated by [(longitudinal circumference of packaged article (toilet roll assembly 2) / longitudinal circumference of packaging body 1) / paper thickness per product ply of kraft wrapping paper 3] preferably has a lower limit of 0.59 or more, and even more preferably 0.64 or more. The upper limit is preferably 0.84 or less, and even more preferably 0.76 or less.

[0044] Furthermore, it is preferable that the value calculated by [(perimeter in the short direction of the packaged item (toilet roll assembly 2) / perimeter in the short direction of the package 1) / paper thickness per product ply of the kraft wrapping paper 3] is 0.53 or more and 0.92 or less. If the value is less than 0.53, the package 1 will be prone to sagging overall. If the value exceeds 0.92, the packaging will be too tight, causing the core of the toilet roll 20 to be crushed or the roll to be deformed, resulting in poor aesthetic appeal. In addition, the kraft wrapping paper 3 will be prone to tearing. The value calculated by [(short-side circumference of packaged item (toilet roll assembly 2) / short-side circumference of packaging body 1) / paper thickness per product ply of kraft wrapping paper 3] preferably has a lower limit of 0.57 or more, and even more preferably 0.62 or more. The upper limit is preferably 0.81 or less, and even more preferably 0.74 or less.

[0045] In addition, in the packaged item (toilet roll assembly 2), at least one toilet roll 20 is in the form of a film packaging 11 wrapped in a film 10 (i.e., the toilet roll assembly 2 can also be referred to as a plurality of film packaging 11 arranged and / or stacked). The material of the film 10 used in the film packaging 11 can be any material typically used for packaging roll products, such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), etc., without any particular restrictions, but PE is preferred. These materials have good stretchability, which reduces tearing when wrapped in the kraft wrapping paper 3. Furthermore, the number of toilet rolls 20 contained in the film packaging 11 is not particularly limited except that it must be at least one, but considering the strength of the film, the lower limit is preferably one or more, more preferably two or more, and even more preferably four or more. The upper limit is preferably 16 or less, more preferably 12 or less, and even more preferably 8 or less.

[0046] (Toilet roll) Figure 2 is a perspective view showing the appearance of the toilet roll 20 included in the toilet roll assembly 2 in the toilet roll packaging 1 of Figure 1. The toilet roll 20 according to one embodiment of the present invention is toilet paper 20x wound into a roll. The toilet paper 20x (hereinafter also simply referred to as a sheet) is preferably perforated in the width direction at approximately equal intervals in the machine direction (not shown). The number of plies of the toilet paper 20x is preferably between 1 and 2, and more preferably 2.

[0047] As shown in FIG. 2, the surface of the toilet paper 20x that faces the outside of the roll is referred to as the roll surface 20a (the surface of the toilet paper 20x), the surface that faces the center of the roll is referred to as the roll back surface 20b (the back surface of the toilet paper 20x), and the outermost end of the wound toilet paper 20x is referred to as the outermost roll edge 20e of the toilet paper 20x.

[0048] (winding length and winding diameter) When the toilet paper 20x is one-ply, the lower limit of the roll length of the toilet roll 20 is preferably 150 m or more, and the upper limit is preferably 180 m or less, more preferably 170 m or less, and even more preferably 160 m or less. When the toilet paper 20x is two-ply, the lower limit is preferably 75 m or more, and the upper limit is preferably 95 m or less, more preferably 93 m or less, and even more preferably 90 m or less. If the winding length is less than 150 m for one ply or less than 75 m for two ply, the cross-sectional area of ​​the toilet roll 20 will be small, making the roll more likely to be crushed due to loading and resulting in poor decorativeness. If the winding length exceeds 180 m for one ply or 95 m for two ply, the roll weight will increase, making the kraft wrapping paper 3 more likely to tear. Furthermore, the roll will be more likely to be crushed due to loading and resulting in poor decorativeness.

[0049] Furthermore, the lower limit of the roll diameter DR of the toilet roll 20 is preferably 110 mm or more, more preferably 113 mm or more, and even more preferably 117 mm or more. The upper limit is preferably 130 mm or less, more preferably 126 mm or less, and even more preferably 122 mm or less. If the roll diameter DR is less than 110 mm, the cross-sectional area of ​​the toilet roll 20 will be small, making the roll more likely to be crushed due to stacking and resulting in poor decorativeness. If the roll diameter DR exceeds 130 mm, the roll weight will increase, making the kraft wrapping paper 3 more likely to tear. Furthermore, the roll will be more likely to be crushed due to stacking and resulting in poor decorativeness.

[0050] To determine the roll length, measure the length of 10 sheets of toilet paper 20x between the perforations on the toilet roll 20. Then, measure the number of sheets of toilet paper 20x on the toilet roll 20, and calculate the roll length proportionally from the length of 10 sheets and the number of sheets of toilet paper 20x. For example, if the length of 10 sheets is 1.80m and there are 200 sheets of toilet paper 20x, then the roll length is 1.80m x (200 / 10) = 36m. If the toilet roll 20 does not have perforations, the roll length can be determined by measuring it. The roll diameter DR is measured using a diameter ruler manufactured by Muratec KDS Co., Ltd. The roll length and roll diameter DR are measured by measuring four toilet rolls 20 selected from different individual packages within the packaged item (toilet roll assembly 2), and the measurement results are averaged.

[0051] The roll length of the toilet roll 20 is equal to or greater than the value calculated by (150 / number of plies of toilet paper 20x). If the roll length is smaller than the calculated value, and the roll diameter DR remains unchanged, the roll density will be lower, which will make the roll more susceptible to crushing due to lamination and result in poor aesthetics.

[0052] (seat length and width) Furthermore, the length between perforations (the sheet length of the toilet paper 20x) has a lower limit of preferably 200 mm or more, more preferably 210 mm or more, and even more preferably 220 mm or more, and an upper limit of preferably 260 mm or less, more preferably 250 mm or less, and even more preferably 240 mm or less. Furthermore, the lower limit of the sheet width of the toilet paper 20x is preferably 102 mm or more, more preferably 104 mm or more, and even more preferably 106 mm or more. The upper limit is preferably 120 mm or less, more preferably 117 mm or less, and even more preferably 114 mm or less. By ensuring that the sheet length and sheet width are within the above numerical ranges, the toilet roll 20 of the present application will have an appropriate usable area and absorbency, making it particularly suitable for use with warm-water washing toilet seats. However, a larger sheet width will result in an increased roll weight, making the kraft wrapping paper 3 more likely to tear. Furthermore, the roll will be more likely to be crushed when stacked, resulting in poor aesthetic appeal.

[0053] (roll weight) The roll weight of the toilet roll 20 is preferably 194 g or more and 295 g or less. If the roll weight is less than 194 g, the basis weight of the toilet paper 20x will be low, which will reduce the strength of the sheet and make it difficult to roll up tightly. As a result, the roll will be more likely to be crushed due to stacking, and the aesthetic appeal will be poor. If the roll weight exceeds 295 g, the weight of the packaged item (toilet roll assembly 2) will increase, making the kraft wrapping paper 3 more likely to tear. In addition, the roll will be more likely to be crushed due to loading, and the aesthetic appeal will be poor. The lower limit of the roll weight of the toilet roll 20 is preferably 214 g or more, and even more preferably 227 g or more. The upper limit is preferably 285 g or less, and even more preferably 260 g or less. The roll weight is the weight of one roll per 108 mm of roll width including the paper tube (core) of the toilet roll 20, and if the roll width is not 108 mm, it is converted to the weight per 108 mm by proportional calculation.

[0054] (Core outer diameter) The core outer diameter DI, which is the outer diameter of the core (paper tube) of the toilet roll 20 of the present invention, has a lower limit of preferably 33 mm or more, more preferably 35 mm or more, and even more preferably 37 mm or more. The upper limit is preferably 46 mm or less, more preferably 44 mm or less, and even more preferably 42 mm or less. If the core outer diameter DI is less than 33 mm, the winding length increases, resulting in an increased roll weight, making the kraft wrapping paper 3 more likely to tear. If the core outer diameter DI exceeds 46 mm, the cross-sectional area of ​​the roll becomes smaller, making the roll more likely to be crushed due to loading and resulting in poor aesthetic appeal. By ensuring that the core outer diameter DI is within the above range, the aesthetic appeal of the packaging 1 is less likely to be compromised due to the toilet roll 20 inside being crushed, and the kraft wrapping paper 3 is less likely to sag or tear. The core outer diameter DI is measured using a diameter rule manufactured by Muratec KDS Co., Ltd. Measurements are taken by measuring the cardboard tubes of four toilet rolls 20 selected from different film packaging 11 within the packaged item (toilet roll assembly 2), and the measurement results are averaged. If the toilet roll 20 does not have a cardboard tube, the diameter of the center hole is measured.

[0055] (core weight) The weight of the core (paper tube) of the toilet roll 20 of the present invention preferably has a lower limit of 3.0 g or more, more preferably 3.5 g or more, and even more preferably 4.0 g or more. The upper limit is preferably 7.0 g or less, more preferably 6.5 g or less, and even more preferably 6.0 g or less. If the core weight is less than 3.0 g, the basis weight of the core (paper tube) will be small and soft, making the core more susceptible to crushing and resulting in poor aesthetic appeal. If the core weight exceeds 7.0 g, the roll weight will increase, making the kraft wrapping paper 3 more susceptible to tearing. By keeping the core weight within the above range, the cosmetic appearance of the toilet roll 20 inside is less likely to be reduced due to crushing, and the kraft wrapping paper 3 is less likely to sag or tear, resulting in a package 1. The core weight is the weight of the core (paper tube) per 108 mm of roll width in the toilet roll 20, and if the roll width is not 108 mm, it is converted to the weight per 108 mm by proportional calculation.

[0056] (roll density) The roll density of the toilet roll 20 is 0.18 g / cm 3 More than 0.28g / cm 3 It is preferable that the roll density is 0.18 g / cm or less. 3 If the roll density is less than 0.28 g / cm, the roll will be loosely wound, which will result in roll crushing due to lamination and poor decorative properties. 3 If the weight exceeds this value, the weight of the entire packaging body 1 increases, making the kraft wrapping paper 3 more likely to tear. The roll density of the toilet roll 20 has a lower limit of 0.20 g / cm 3 More preferably, it is 0.21 g / cm or more. 3 The upper limit is more preferably 0.27 g / cm. 3 More preferably, it is 0.25 g / cm or less. 3 It is more preferable that:

[0057] Roll density is expressed as (roll weight) ÷ (roll volume). Roll weight is the weight of toilet roll 20 per 108 mm of roll width. Roll volume is expressed as [{cross-sectional area of ​​the roll outer diameter (winding diameter DR)} - (cross-sectional area of ​​the core outer diameter DI)] x roll width (converted per 114 mm). For example, if the roll weight (excluding the paper core) per 108 mm of roll width is 250 g, the winding diameter DR is 118 mm, and the core outer diameter DI is 39 mm, the roll density = 0.24 g / cm 3 This becomes:

[0058] (winding density) The winding density of the toilet roll 20 is 1.47 m / cm2 More than 1.80m / cm 2 The winding density is 1.47m / cm 2 If the winding density is less than 1.80 m / cm, the roll is too soft and is prone to being crushed when loaded, resulting in poor cosmetic quality. 2 If the thickness exceeds this, the sheet will be pulled too hard when wound up to make it tight, making it more likely to tear and less aesthetically pleasing. The lower limit of the winding density of the toilet roll 20 is 1.49 m / cm 2 It is preferable that the thickness is 1.52 m / cm or more. 2 The upper limit is more preferably 1.75 m / cm. 2 Preferably, it is 1.70 m / cm or less. 2 More preferably, it is:

[0059] The winding density is expressed as (winding length x number of plies) ÷ (cross-sectional area of ​​the roll). The cross-sectional area of ​​the roll is expressed as {cross-sectional area of ​​the roll outer diameter (winding diameter DR) - (cross-sectional area of ​​the core outer diameter DI)}. For example, in the case of a winding length of 75 m, 2 plies, winding diameter DR of 118 mm, and core outer diameter DI of 39 mm, the winding density = (75 m x 2) ÷ {3.14 x (118 mm ÷ 2 ÷ 10)} 2 -3.14×(39mm÷2÷10) 2}=1.54m / cm 2 This becomes:

[0060] <Toilet paper> The base paper used in the toilet paper 20x according to one embodiment of the present invention may be made of 100% wood pulp by mass, or may include recycled paper pulp, non-wood pulp, deinked pulp, recycled paper from liquid beverage cartons, etc. However, from the standpoint of quality, the content of pulp other than wood pulp or recycled paper, etc. is preferably 50% by mass or less, more preferably 30% by mass or less, even more preferably 10% by mass or less, and most preferably 0% by mass. To achieve the target quality, the NBKP (softwood bleached kraft pulp) content is preferably 5% to 55% by mass, more preferably 15% to 45% by mass, and even more preferably 20% to 35% by mass, and the LBKP (hardwood bleached kraft pulp) content is preferably 45% to 95% by mass, more preferably 55% to 85% by mass, and even more preferably 65% ​​to 80% by mass.

[0061] Additives that can be used in the paper stock include softeners, including debonder softeners, bulking agents, dyes, dispersants, dry strength agents, drainage improvers, pitch control agents, and absorbency improvers, depending on the quality required for the final product. It is also preferable not to use wet strength agents. When recycled paper is used as toilet paper, the same processing is carried out as for virgin paper.

[0062] (Basic weight) The basis weight per ply of toilet paper 20x is 12.0 g / m 2 More than 18.2g / m 2 The basis weight of toilet paper 20x is preferably 12.0 g / m or less. 2 If the basis weight is less than 18.2 g / m, the strength of the sheet will be low and it will be difficult to roll up tightly, resulting in roll crushing due to lamination and poor cosmetic appearance. 2 If the weight exceeds this value, the weight of the entire package 1 will increase, making the kraft wrapping paper 3 more likely to tear. In addition, the roll will be more likely to be crushed due to loading, and the decorative properties will be poor. The minimum basis weight per ply of toilet paper 20x is 13.2 g / m 2 More preferably, it is 14.0 g / m or more. 2 The upper limit is more preferably 17.6 g / m or more. 2 More preferably, it is 16.0 g / m or less. 2It is more preferable that the basis weight per ply of toilet paper 20x is measured in accordance with JIS P 8124.

[0063] (paper thickness) The paper thickness of the toilet paper 20x according to one embodiment of the present invention preferably has a lower limit of 0.55 mm / 10 plies or more, more preferably 0.65 mm / 10 plies or more, and even more preferably 0.75 mm / 10 plies or more. The upper limit is preferably 1.15 mm / 10 plies or less, more preferably 1.05 mm / 10 plies or less, and even more preferably 0.95 mm / 10 plies or less. If the paper thickness is less than 0.55 mm / 10 plies, the sheet will be more likely to tear and will be difficult to wind tightly, resulting in roll crushing due to lamination and poor aesthetic appeal. If the paper thickness exceeds 1.15 mm / 10 plies, the winding density and roll density must be increased to achieve a longer length, resulting in an increased roll weight and making the kraft wrapping paper more likely to tear. By having the paper thickness within the numerical range, the toilet roll 20 inside is less likely to be crushed, resulting in a packaging body 1 that is less likely to lose its aesthetic appeal, and the kraft packaging paper 3 is less likely to bend or tear.

[0064] The thickness of toilet paper 20x is measured using a thickness gauge (a dial thickness gauge called "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa, a probe diameter of 30 mm, and a sample placed between the probe and the measuring table. The gauge is read when the probe is lowered at a speed of 1 mm per second or less. If the toilet paper 20x is two-ply, five pairs of two-ply toilet paper 20x are stacked together, and the measurement is taken as 10 sheets, and the thickness of the 10-ply paper is calculated. The measurement is repeated 10 times (measurements are taken at 10 different locations, not the same location 10 times), and the average of the measurement results is used as the final paper thickness. For single-ply toilet paper 20x, the thickness is calculated as 10 sheets, and the thickness of the 10-ply paper is calculated as 10 pairs of two-ply toilet paper 20x.

[0065] (Embossed) The toilet paper 20x according to one embodiment of the present invention is preferably embossed. In the case of a two-ply toilet paper, the embossing is preferably a single embossing that is imparted to both the ply on the roll surface 20a side and the ply on the roll back surface 20b side at the same time after the plies are laminated. Regarding the ply to be embossed, when the toilet paper 20x is two-ply, it is preferable that the embossing be applied to both the ply on the roll front surface 20a side and the ply on the roll back surface 20b side at the same time. Additionally, it is preferable that the ply bonding in the toilet paper 20x does not use ply bond glue.

[0066] <Method for manufacturing toilet roll packaging> The manufacturing process for the toilet roll package 1 and the toilet roll 20 can be carried out, for example, in the following order: (1) papermaking and creping, (2) ply lamination by embossing, (3) roll winding, (4) film wrapping of multiple rolls, and (5) kraft wrapping of multiple film wrappings.

[0067] The packaging form of the packaging body 1 according to the present invention is preferably caramel packaging. Caramel packaging involves wrapping the packaged item (assembly 2) in a packaging base material (kraft wrapping paper 3) that extends in one direction of the packaged item (assembly 2), or placing the packaged item (assembly 2) from one axial end of a packaging base material (kraft wrapping paper 3) that has been pre-formed into a cylindrical shape. Then, of the packaging base material (kraft wrapping paper 3) that protrudes from both ends of the packaged item (assembly 2), two opposing flap-shaped sides are folded together, and then two other opposing flap-shaped sides are similarly folded together, and these folded portions are sealed with heat sealing, tape, etc.

[0068] The folded portion of the kraft wrapping paper 3 is preferably sealed with tape 30. Examples of the type of tape 30 include cloth tape, kraft tape, and cellophane tape, but kraft tape, which is made of the same material as the kraft wrapping paper 3, is particularly preferred.

[0069] Furthermore, it is preferable that the ratio of the width of the tape 30 to the height of the packaging body 1 is 20% or more and 40% or less. If the ratio is less than 20%, the tape 30 will easily peel off when the folded portion is held, resulting in poor aesthetic appeal. If the ratio exceeds 40%, the printing area of ​​the packaging body 1 will be narrow, resulting in poor aesthetic appeal. Furthermore, the manufacturing cost of the packaging body 1 will increase. The ratio of the width of tape 30 to the height of packaging body 1 is preferably 25% or more, and more preferably 27% or more, with an upper limit of 35% or less, and even more preferably 33% or less. The width of tape 30 is the dimension of the tape in a direction parallel to the Z-axis direction in FIG. 1, which is the direction parallel to the height direction of packaging body 1.

[0070] As explained above, according to this embodiment, it is possible to provide a toilet roll package 1 that is less likely to cause the toilet roll 20 inside to be crushed, the ink on the film to peel off, or the toilet paper 20x on the surface of the roll to tear, thereby reducing the aesthetic appeal of the product, and the kraft wrapping paper 3 to be less likely to bend or tear, and is inexpensive and easy to process and transport. [Example]

[0071] The present invention will be explained in more detail with reference to the following examples and comparative examples, but the present invention is not limited to these examples in any way.

[0072] Under the conditions shown in Tables 1 and 2, toilet rolls and toilet roll packages of Examples 1 to 21 and Comparative Examples 1 to 7 were produced and evaluated as follows. Each evaluation was carried out after maintaining the sample in an equilibrium state under the temperature and humidity conditions (23±1°C, 50±2% RH) specified in JIS P8111. Each parameter other than the evaluations below was measured according to the standards or measurement methods described above.

[0073] (resistance to bending) The package was lifted by holding the center of the package lengthwise, and then a 1 m ruler (Shinwa Measuring Co., Ltd., silver ruler, JIS Class 1, stainless steel, 425 g) was placed along the length of the package at the center of the package lengthwise and widthwise so that it was parallel to the floor, and the height distance between the end of the package lengthwise and the ruler at the end of the package lengthwise was measured. Evaluation was then performed according to the following criteria, with a score of 2 or higher being considered a pass. 5: The distance between the longitudinal end and the ruler is 0 mm or more and less than 20 mm 4: The distance between the longitudinal end and the ruler is 20 mm or more and less than 25 mm 3: The distance between the longitudinal end and the ruler is 25mm or more and less than 30mm 2: The distance between the longitudinal end and the ruler is 30 mm or more and less than 40 mm 1: The distance between the longitudinal end and the ruler is 40 mm or more

[0074] (Tear resistance) 100 packages were created, and each package was lifted 10 times and then placed on the floor. Evaluation was carried out according to the following criteria, with a score of 2 or higher being considered a pass. 5: Kraft wrapping paper was torn 0 times during testing 4: Kraft wrapping paper was torn once during testing. 3: Kraft wrapping paper was torn twice during testing. 2: During the test, the kraft wrapping paper broke three times. 1: The kraft wrapping paper was torn more than four times during the test.

[0075] (Ease of processing) Of the 100 packages produced, the number of packages with packaging defects was counted and evaluated according to the following criteria, with a score of 2 or higher being considered acceptable. 5: 0 out of 100 packages are defectively packaged 4: 1 out of 100 packages is defectively packaged 3: 2 out of 100 packages are defectively packaged 2: 3 out of 100 packages are poorly packaged 1: 4 or more defective packages out of 100

[0076] (cosmetic) The sensory evaluation was carried out by 20 monitors, who selected "good" or "bad" for the appearance of the package and the aesthetics of the packaged items after removal. The evaluation was carried out according to the following criteria, with a score of 2 or above being considered a pass. 5: 19 or more people answered "Good" 4: 17 to 18 people answered "Good" 3: 15 to 16 people answered "Good" 2: 12 to 14 people answered "Good" 1: 11 or fewer people answered "Good"

[0077] (cost) The basis weight of the kraft wrapping paper was measured as a parameter related to the manufacturing cost of the packaging and evaluated on a 5-point scale. The evaluation criteria are as follows: The evaluation was performed according to the following criteria, with a score of 3 or higher being considered a pass. 5: Basis weight 110 g / m 2 When: 4: Basis weight 110g / m 2 Exceeds 120g / m 2 When: 3: Basis weight 120g / m 2 Exceeds 130g / m 2 When: 2: Basis weight 130 g / m 2 Exceeds 140g / m 2 When: 1: Basis weight 140g / m 2 When it exceeds

[0078] Tables 1 and 2 show the conditions and evaluation results for each example and each comparative example. [Table 1]

[0079] [Table 2]

[0080] From the above, it was confirmed that this example makes it possible to obtain a toilet roll package that is less likely to cause the toilet roll inside to be crushed, the ink on the film to peel off, or the toilet paper on the surface of the roll to tear, resulting in a cosmetically appealing product, and that is less likely to bend or tear due to the kraft wrapping paper, and is inexpensive and easy to process and transport. [Explanation of symbols]

[0081] 1 (Toilet roll) packaging 2 (Toilet roll) assembly 3. Kraft wrapping paper 10 Film 11 Film packaging 20 toilet rolls 20a roll surface 20b Roll back 20e The outermost edge of a roll of toilet paper 20x toilet paper 30 Tape 100 Regular roll packaging 110 Regular Roll 111 Regular film packaging 200 Long roll packaging 210 Long roll 211 Long film packaging 300 Arm

Claims

1. A toilet roll package in which at least one toilet roll, which is toilet paper wound into a roll, is wrapped in a film, and the film packages are arranged in a direction perpendicular to the axial direction of the toilet rolls and / or stacked in a direction parallel to the axial direction, and the packaged item is wrapped in kraft wrapping paper, The toilet roll has a winding length equal to or greater than the value calculated by (150 / number of plies of the toilet paper) and a winding density of 1.47 m / cm ２ 1.80m / cm or more ２ is as follows: The basis weight of the kraft wrapping paper per product ply is 70 g / m ２ 130g / m or more ２ is as follows: The vertical Clark stiffness of the kraft wrapping paper based on JIS P 8143 is 116 cm. ３ / 100 or more 291cm ３ / 100 or less, horizontal Clark fear is 52 cm ３ / 100 or more 138cm ３ / 100 or less, A toilet roll package, characterized in that the difference Δ (LPA-LPB) between the longitudinal perimeter (LPA) of the package and the longitudinal perimeter (LPB) of the packaged item is -50 mm or more and 50 mm or less.

2. The toilet roll package according to claim 1, wherein the difference Δ (SPA-SPB) between the perimeter (SPA) of the package in the short direction and the perimeter (SPB) of the packaged item in the short direction is -80 mm or more and 10 mm or less.

3. The toilet roll packaging according to claim 1, wherein the kraft wrapping paper has a tensile strength DMDT per product ply in the MD direction when dry according to JIS P 8113 of 6.9 kN / m or more and 15.3 kN / m or less.

4. 2. The toilet roll packaging according to claim 1, wherein the kraft wrapping paper has a tensile strength (DCDT) in the CD direction per product ply in a dry state according to JIS P 8113 of 3.1 kN / m or more and 5.7 kN / m or less.

5. 2. The toilet roll packaging according to claim 1, wherein the kraft wrapping paper has a paper thickness per product ply of 106 μm or more and 182 μm or less when a load of 100 kPa is applied.

6. The toilet roll packaging according to claim 1, wherein the roll weight of the toilet roll is 194 g or more and 295 g or less.

7. The roll density of the toilet roll is 0.18 g / cm ３ 0.28g / cm or more ３ 2. The toilet roll packaging of claim 1, wherein:

8. The basis weight per ply of the toilet paper is 12.0 g / m ２ 18.2g / m or more ２ 2. The toilet roll packaging of claim 1, wherein:

9. The toilet roll packaging according to claim 1, wherein the total number of toilet rolls contained in the packaged item is 12 or more and 84 or less.

10. The packaging form of the package is caramel packaging, The folded portion of the kraft wrapping paper is sealed with tape; 2. The toilet roll package according to claim 1, wherein the ratio of the width of the tape to the height of the package is 20% or more and 40% or less.

11. 2. The toilet roll packaging according to claim 1, wherein the value calculated by [(longitudinal circumference of the packaged item / longitudinal circumference of the packaging body) / paper thickness per product ply of the kraft packaging paper] is 0.55 or more and 0.94 or less.

12. 2. The toilet roll packaging according to claim 1, wherein the value calculated by [(perimeter of the packaged item in the short side direction / perimeter of the packaging body in the short side direction) / paper thickness per product ply of the kraft packaging paper] is 0.53 or more and 0.92 or less.

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