Roll-like paper towel package

Abstract

To provide a roll-like paper towel package in which perforations are easy to tear and open when opening, which allows a roll product inside to be taken out easily, and which can prevent tear and open of perforations in an unintended situation such as falling, during processing and transportation.SOLUTION: In a roll-like paper towel package 10, two rolls or three rolls of roll products 20 in which a paper towel is wound in a roll shape are caramel-packaged by a resin film 30. At least on a side surface 13 of the roll-like paper towel package 10, perforations 15 for opening are provided in the width direction of the roll products 20 along any one of the roll products 20. Tensile strength of the perforations 15 is equal to or greater than 3 N / 50 mm and equal to or less than 53 N / 50 mm. Paper towel emboss depth on a surface 22 of the roll product 20 is equal to or greater than 300 μm and equal to or less than 800 μm. A value expressed by the formula: (paper towel emboss depth / tensile strength of perforations 15)×100 is equal to or greater than 15 and equal to or less than 55.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] In roll products in which multiple rolls are packaged in film, perforations are often provided for opening. Patent Document 1, for example, is an example of a perforation for opening in a film package of multiple rolls.

[0003] In a film packaging bag containing multiple rolls, valleys are formed between the rolls and the film is stretched, so providing perforations in the width direction of the roll makes it easier to open. However, if there are perforations in the valleys, there is a risk that the bag will be opened unintentionally if the bag is lifted by hand, as stress is applied to the perforations.

[0004] If the strength of the perforations is increased in order to prevent unintentional opening, it may become difficult to open. As for the thickness of the film, if it is too thin, it may lead to accidental opening of the perforations, and if it is too thick, it may be difficult to open.

[0005] Furthermore, as in Patent Document 2, there are cases where the perforations are provided along the width of the roll rather than in the valleys between the rolls. In that case, if the embossing depth of the inner roll product is too shallow, fingers will slip when opening the package, making it difficult to transmit force to the perforations and to tear the perforations. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2015-054717 A [Patent Document 2] JP 2022-131679 A Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, an object of the present disclosure is to provide a roll-type paper towel package that contains two or three rolls of roll products and that allows the perforations to be easily torn when opened, allowing the roll product inside to be easily removed, and prevents the perforations from tearing in unintended situations such as during processing, transportation, or when dropped. [Means for solving the problem]

[0008] In order to solve the above problems, a first aspect of the present invention is a roll-shaped paper towel package in which two or three rolls of roll products formed by winding paper towels into a roll are caramel-packaged in a resin film, wherein at least the side surfaces of the top, bottom, and side surfaces of the roll-shaped paper towel package have perforations for opening provided in the width direction of the roll product along one of the roll products, the tensile strength of the perforations being 3 N / 50 mm or more and 53 N / 50 mm or less, the embossing depth of the paper towel on the surface of the roll product being 300 μm or more and 800 μm or less, and the value represented by the formula: (embossing depth of the paper towel / tensile strength of the perforations)×100 is 15 or more and 55 or less.

[0009] A second aspect of the present invention is a roll-type paper towel packaging of the first aspect described above, wherein the perforations are arranged such that perforation cut portions and non-perforation cut portions are arranged alternately, and the ratio of the sum of the total length of the perforation cut portions and the total length of the non-perforation cut portions to the total length of the non-perforation cut portions (total length of the non-perforation cut portions / (total length of the perforation cut portions+total length of the non-perforation cut portions)×100) is greater than or equal to 25% and less than 75%.

[0010] A third aspect of the present invention is a roll-shaped paper towel packaging of the second aspect described above, wherein the length of each of the perforated cut portions is 1 mm or more and 10 mm or less, and the length of each of the non-perforated cut portions is 1 mm or more and 10 mm or less.

[0011] A fourth aspect of the present invention is the roll-shaped paper towel package according to any one of the first to third aspects, wherein the tear strength of the resin film is 0.2 N or more and 3.0 N or less.

[0012] A fifth aspect of the present invention is the roll-shaped paper towel package according to any one of the first to third aspects, wherein the resin film has a thickness of 20 μm or more and 50 μm or less.

[0013] A sixth aspect of the present invention is the roll-shaped paper towel package according to any one of the first to third aspects, wherein the basis weight of the paper towel is 40 g / m 2 More than 150g / m 2 The following is the result.

[0014] A seventh aspect of the present invention is a roll-shaped paper towel package according to any one of the first to third aspects, wherein the roll product has a roll density of 0.05 g / cm. 3 More than 0.16g / cm 3 The following is the result.

[0015] An eighth aspect of the present invention is the roll-shaped paper towel package according to any one of the first to third aspects, wherein the paper towel has a thickness of 200 μm or more and 1300 μm or less.

[0016] A ninth aspect of the present invention is the roll-shaped paper towel package according to any one of the first to third aspects, wherein the roll product has a winding diameter of 90 mmφ or more and 160 mmφ or less.

[0017] A tenth aspect of the present invention is a roll-type paper towel package according to any one of the first to third aspects, wherein in the roll-type paper towel package, the ratio of the theoretical circumference of the resin film to the actual inner circumference of the resin film ((theoretical circumference of the resin film / actual inner circumference of the resin film) x 100) is 70% or more and 100% or less.

[0018] An eleventh aspect of the present invention is a roll-type paper towel package according to any one of the first to third aspects, wherein in the roll-type paper towel package, a value expressed by the formula: ((theoretical circumference of the resin film × roll density of the roll product) / actual inner circumference of the resin film) × 100 is 5 or more and 16 or less.

[0019] A twelfth aspect of the present invention is a roll-shaped paper towel package according to any one of the first to third aspects, comprising a heat seal adhesive portion arranged in a predetermined pattern on the top and bottom surfaces of the roll-shaped paper towel package, and when viewed from the top and bottom surfaces, an angle formed by an imaginary line extending from the center of the roll product along which the perforation runs toward the perforation on the side surface and the pattern of the heat seal adhesive portion is greater than or equal to 10° and less than or equal to 80°.

[0020] A thirteenth aspect of the present invention is the roll-shaped paper towel package according to any one of the first to third aspects, wherein the paper towel contains synthetic fibers and pulp fibers. Effect of the Invention

[0021] According to the present disclosure, it is possible to provide a roll-type paper towel package that contains two or three rolls of roll products and that allows the perforations to be easily torn when opened, allowing the roll product inside to be easily removed, and prevents the perforations from tearing in unintended situations such as during processing, transportation, or when dropped. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view of a rolled paper towel package according to one embodiment of the present invention. [Diagram 2] FIG. 11 is a perspective view showing a modified example of a roll-shaped paper towel package. [Diagram 3] FIG. [Figure 4]2 is a schematic plan view showing the relationship between the heat-sealed portions and the perforations on the top surface (or bottom surface) of the roll-shaped paper towel package of FIG. 1. FIG. [Diagram 5] FIG. 1 is a perspective view of a roll of paper towels. [Figure 6] FIG. 2 is an explanatory diagram of the theoretical circumference of a resin film, where (a) shows the case of two rolls and (b) shows the case of three rolls. [Figure 7] FIG. 2 is a cross-sectional view showing embossments provided on the front and back surfaces of the paper towel. [Figure 8] 1A and 1B are diagrams showing height profiles on an XY plane taken by a microscope, where (a) is shown in shading and (b) is shown in cross-sectional curves. [Figure 9] FIG. 8(b) is a diagram showing a contour curve output from the cross-sectional curve of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, one embodiment of the present invention will be described in detail. However, the following embodiment is presented for the purpose of illustration, and the present invention is not limited to the embodiment shown below.

[0024] <Rolled paper towel packaging> Fig. 1 is a perspective view of a roll-type paper towel package according to one embodiment of the present invention. Fig. 2 is a perspective view showing a modified example of the roll-type paper towel package. Fig. 3 is an explanatory diagram of perforations. Fig. 4 is a schematic plan view showing the relationship between the heat-sealed portion and the perforations on the top surface (or bottom surface) of the roll-type paper towel package in Fig. 1.

[0025] As shown in FIG. 1, a roll-shaped paper towel package 10 according to this embodiment (hereinafter, sometimes simply referred to as "package 10") is a package 10 in which two rolls of roll product 20, formed by winding up paper towel 20a (see FIG. 5), are caramel-packaged in resin film 30. In this embodiment, the roll product 20 is packaged in resin film 30 so that the axial direction of the roll product 20 and the MD direction of the resin film 30 coincide with each other. Note that, in this embodiment, the roll-shaped paper towel package 10 is a package 10 that packages two rolls of roll product 20, but is not limited thereto, and may be a package 10 that packages three rolls of roll product 20 as shown in FIG. 2.

[0026] In this embodiment, as described later, the tensile strength of the perforation 15 for opening, the embossing depth t2 of the paper towel 20a on the surface of the roll product 20, and the relationship between the tensile strength of the perforation 15 and the embossing depth t2 are appropriately set. As a result, according to this embodiment, in a package 10 in which two or three rolls of roll product 20 are packaged, it is possible to provide a roll-shaped paper towel package 10 in which the perforation 15 can be easily torn when opening, the roll product 20 inside can be easily removed, and the perforation 15 can be prevented from tearing in unintended situations such as during processing, transportation, or when dropped.

[0027] The details of each component are as follows:

[0028] As shown in FIG. 1, the roll-shaped paper towel package 10 has two roll products 20 (two rolls) of paper towel 20a wound into a roll shape, which are caramel-wrapped in a resin film 30 so that both end faces in the width direction (axial direction) of the roll product 20 face the top surface 11 and bottom surface 12 of the package 10, respectively.

[0029] The roll products 20 are wrapped in a caramel wrapper by the resin film 30 in a state where they are arranged in parallel with each other in the axial direction. Caramel wrapper is known. For example, the roll products 20 are placed on a sheet-like resin film 30, and the resin film 30 is wound around the roll products 20 to form a cylindrical shape, or the roll products 20 are inserted in the same axial direction as the cylindrical resin film 30 from one axial end of the resin film 30 that has been previously formed into a cylindrical shape. Then, of the resin film 30 protruding from both ends of the roll products 20, two opposing flap-shaped sides are folded together, and then two other opposing flap-shaped sides are folded together in the same manner, and these folded parts are sealed by heat fusion or the like. The area sealed by this heat fusion becomes the heat-sealed adhesive part 14 shown by hatching in Figs. 1, 2, and 4.

[0030] The top surface 11 and bottom surface 12 of the roll-shaped paper towel package 10 have a caramel packaging surface, and the top surface 11 is further provided with a heat seal adhesive portion 14 having a predetermined pattern. It is preferable that the bottom surface 12 of the package 10 is also provided with a heat seal adhesive portion 14. The package 10 is also provided with a perforation 15 for opening along one of the roll products 20 (the roll product 20 on the left side as viewed in Figs. 1 and 2) in the width direction of the roll product 20 from the top surface 11 to the bottom surface 12 via the side surface 13. That is, the perforation 15 for opening is provided along one of the roll products 20 in the width direction of the roll product 20 on at least the side surface 13 among the top surface 11, bottom surface 12, and side surface 13 of the roll-shaped paper towel package 10. In this way, the perforations 15 for opening are provided along the roll product 20, and therefore, unlike the case where the perforations 15 are provided in the valleys between the multiple roll products 20, it is possible to reduce the load on the perforations 15 when the package 10 is lifted by hand, and to prevent unintentional tearing of the perforations 15. Note that in this embodiment, the perforations 15 are provided on the top surface 11, the bottom surface 12, and the side surface 13, but it is sufficient that the perforations 15 are provided on at least the side surface 13. Furthermore, when the perforations 15 are provided on the side surface 13, the perforations 15 may be provided from top to bottom of the side surface 13, or may be provided in the middle portion of the side surface 13.

[0031] (Perforation) 1 to 3, the perforation 15 in this embodiment is formed by alternately lining up perforation cut-out portions 15a that penetrate the resin film 30 constituting the package 10 in the thickness direction and non-perforation cut-out portions 15b where the resin film 30 remains as is. The non-perforation cut-out portions 15b are regions that are sandwiched on both sides by the perforation cut-out portions 15a.

[0032] The length L1 of each of the perforation cuts 15a is preferably 1 mm or more and 10 mm or less. The lower limit of the above range of the length L1 of each of the perforation cuts 15a is more preferably 2 mm, and even more preferably 3 mm. The upper limit of the above range of the length L1 of each of the perforation cuts 15a is more preferably 9 mm, and even more preferably 8 mm.

[0033] The length L1 of each of the non-perforated portions 15b is preferably 1 mm or more and 10 mm or less. The lower limit of the above range of the length L1 of each of the non-perforated portions 15b is more preferably 2 mm, and even more preferably 3 mm. The upper limit of the above range of the length L1 of each of the non-perforated portions 15b is more preferably 9 mm, and even more preferably 8 mm.

[0034] By setting the length of each of the perforation cut portions 15a and the non-perforation cut portions 15b within the above range, it becomes easier to adjust the tensile strength of the perforation 15, which will be described later, within a predetermined range. The arrangement of the perforation cut portions 15a and the non-perforation cut portions 15b in the perforation 15 may be curved, but is preferably linear.

[0035] (tensile strength of perforation) The tensile strength of the perforation 15 is 3N / 50mm or more and 53N / 50mm or less. By setting the tensile strength of the perforation 15 within the above range, when opening the roll product 20 from the roll-shaped paper towel package 10, it is possible to open the roll product 20 without requiring a large force, so that an opening large enough to easily take out the roll product 20 is formed, and it is possible to prevent the perforation 15 from accidentally tearing in an unintended situation. If the tensile strength of the perforation 15 is less than 3N / 50mm, the perforation 15 tends to accidentally tear in an unintended situation. On the other hand, if the tensile strength of the perforation 15 exceeds 53N / 50mm, even if the heat seal adhesive portion 14 described later is intersected with the perforation 15 at a predetermined angle θ, smooth opening is not possible, or the opening tends not to be large enough to easily take out the roll product 20. The tensile strength of the perforation 15 can be adjusted by, for example, selecting the material and thickness of the resin film 30, the length of each of the perforation cut portions 15a and the non-perforation cut portions 15b, the intersection angle θ with the heat seal adhesive portion 14 described below, etc. The lower limit of the above range of the tensile strength of the perforation 15 is more preferably 8 N / 50 mm, and even more preferably 15.5 N / 50 mm. The upper limit of the above range of the tensile strength of the perforation 15 is more preferably 41.5 N / 50 mm, and even more preferably 28 N / 50 mm.

[0036] The tensile strength of the perforation 15 can be measured, for example, by a method conforming to JIS P 8113 using a Tensilon universal testing machine STB-1225S (manufactured by A & D Co., Ltd.). The test piece has a width dimension (direction perpendicular to the tensile direction of the Tensilon universal testing machine) of 50 mm, a distance between the grippers of 100 mm, a tensile speed of 300 mm / min, a measurement temperature of 23°C, a relative humidity of 50%, and a tensile direction of the film in the TD direction (the direction in which the perforation is parallel to the tensile direction). The tensile strength is measured multiple times (for example, six times), and the average value is taken as the tensile strength of the perforation 15.

[0037] (Ratio of total length of perforation to non-perforated portion) The ratio A of the sum of the total length of the perforation cut portion 15a (sum of L1) and the total length of the non-perforation cut portion 15b (sum of L2) to the total length of the non-perforation cut portion 15b (sum of L2) is preferably 25% or more and 75% or less. The sum of the total length of the perforation cut portion 15a and the total length of the non-perforation cut portion 15b (sum of L1 and L2) is the length L3 from one end of the perforation cut portion 15a located on the most one side to the other end of the perforation cut portion 15a located on the most other side, as shown in FIG. 3. The ratio A can be expressed by the following formula (1). Ratio A = total length of non-perforated portion 15b / (total length of perforated portion 15a + total length of non-perforated portion 15b) × 100 (1) By setting the ratio A represented by the above formula (1) within the above range, it is possible to achieve a high level of both ease of tearing when opening the perforation 15 and resistance to tearing of the perforation 15 in unintended circumstances. The lower limit of the above range of the ratio represented by the above formula (1) is more preferably 33%, and even more preferably 40%. The upper limit of the above range of the ratio represented by the above formula (1) is more preferably 67%, and even more preferably 60%.

[0038] (Intersection angle between heat seal and perforation) 1, 2, and 4, the heat seal adhesive 14 of this embodiment is formed in a pattern of multiple band-shaped heat seal adhesives 14 extending generally parallel to each other in one direction on the top surface 11 of the roll-shaped paper towel package 10 made of a resin film 30. The pattern of the heat seal adhesive 14 is not limited to this embodiment, and examples include a lattice pattern in which one group of multiple heat seal adhesives 14 extending parallel to each other and another group of multiple heat seal adhesives 14 extending parallel to each other are perpendicular to each other, and a pattern in which two types of heat seal adhesives 14 with different widths extend alternately and parallel to each other.

[0039] As shown in FIG. 4, when viewed from the top surface 11 and the bottom surface 12, the angle θ (hereinafter, sometimes simply referred to as "angle θ") formed by the imaginary line VL extending from the center O of the roll product 20 (the roll product 20 on the left side in the drawing) along which the perforation 15 is aligned toward the perforation 15 (position indicated by point P) on the side surface 13 and the pattern of the heat seal adhesive portion 14 is preferably 10° or more and 80° or less. In this embodiment, the perforation 15 is also provided on the top surface 11 along the imaginary line VL, so that the angle θ formed by the perforation 15 on the top surface 11 and the pattern of the heat seal adhesive portion 14 is preferably 10° or more and 80° or less. If the angle θ is set to less than 10°, the heat seal adhesive portion 14 will extend toward the perforation 15 on the side surface 13, so that the force from the heat seal adhesive portion 14 is likely to act on the perforation 15 on the side surface 13, and the perforation 15 may be unintentionally torn. Furthermore, in the case where the perforation 15 is provided on the top surface 11 as in this embodiment, if the angle θ is set to less than 10°, the heat seal adhesive portion 14 is formed in a state nearly parallel to the perforation 15 on the top surface 11, so that the perforation 15 may unintentionally tear during heat sealing, resulting in defects such as holes. On the other hand, if the angle θ is set to more than 80°, when the perforation 15 is opened to remove the roll product 20 from the roll-shaped paper towel package 10, the tearing of the perforation 15 stops at the heat seal adhesive portion 14, which tends to make it difficult to remove the roll product 20 from the package 10. The lower limit of the above range of the angle θ is more preferably 22°, and more preferably 35°. The upper limit of the above range of the angle θ is more preferably 68°, and more preferably 55°.

[0040] <Resin film> The resin film 30 may be formed of a single layer or multiple layers. The material of the resin film 30 is preferably a thermoplastic resin suitable for recycling. Specific examples of the thermoplastic resin include polyolefin (polyethylene, polypropylene, etc.), polyester (PET, etc.), polyamide (nylon, etc.), polycarbonate, polystyrene, polyvinyl chloride, etc. Among these, a polyethylene film is preferable from the viewpoint of fully exerting the effects of this embodiment.

[0041] (Thickness of resin film) The thickness of the resin film 30 is preferably 20 μm or more and 50 μm or less. By setting the thickness of the resin film 30 within the above range, the film is less likely to be erroneously opened during heat fusion in the packaging process, and the perforation 15 can be easily opened. For example, if the thickness of the resin film 30 is less than 20 μm, the film is more likely to be erroneously opened during heat fusion in the packaging process. On the other hand, if the thickness of the resin film 30 exceeds 50 μm, the perforation 15 tends to be difficult to open. The thickness of the resin film 30 can be measured in accordance with JIS K 7130. The lower limit of the above range of the thickness of the resin film 30 is more preferably 25 μm, and more preferably 30 μm. The upper limit of the above range of the thickness of the resin film 30 is more preferably 45 μm, and more preferably 40 μm.

[0042] (Tensile strength of resin film) The tensile strength of the resin film 30 is preferably 5 N / 10 mm or more and 20.5 N / 10 mm or less. By setting the tensile strength of the resin film 30 within the above range, the risk of erroneous opening tends to be further reduced. The tensile strength of the resin film 30 can be measured in accordance with JIS K 7127. The lower limit of the above range of the tensile strength of the resin film 30 is more preferably 9 N / 10 mm, and even more preferably 12 N / 10 mm. The upper limit of the above range of the tensile strength of the resin film 30 is more preferably 19.5 N / 10 mm, and even more preferably 18 N / 10 mm.

[0043] (Tear strength of resin film) The tear strength of the resin film 30 is preferably 0.2N or more and 3.0N or less. By setting the tear strength of the resin film 30 within the above range, it is possible to achieve both ease of opening the perforation 15 and the difficulty of opening by mistake. The tear strength of the resin film can be measured in accordance with JIS K 7128-2. The tear strength in this embodiment refers to the strength when the resin film 30 is torn in the MD direction (the direction parallel to the width direction of the roll product 20 when packaged). The lower limit of the above range of the tear strength of the resin film 30 is more preferably 0.3N, and even more preferably 0.4N. The upper limit of the above range of the tear strength of the resin film 30 is more preferably 2.0N, and even more preferably 1.0N.

[0044] (Inner circumference of the resin film of the rolled paper towel packaging) The inner perimeter length P1 of the resin film 30 of the roll-shaped paper towel package 10 is the actual inner perimeter length P1 of the resin film 30 in the roll-shaped paper towel package 10 when two or three rolls of the roll product 20 are packaged, and is preferably 580 mm or more and 880 mm or less. By setting the actual inner perimeter length P1 of the package 10 (hereinafter, sometimes simply referred to as the "inner perimeter length P1 of the package 10") within the above range, it is possible to achieve both ease of opening the perforation 15 and difficulty in opening it by mistake. The inner perimeter length P1 of the package 10 can be obtained by actually measuring the perimeter of the resin film 30 of the roll-shaped paper towel package 10. The lower limit of the above range of the inner perimeter length P1 of the package 10 is more preferably 590 mm, and more preferably 600 mm. The upper limit of the above range of the inner perimeter length P1 of the package 10 is more preferably 870 mm, and more preferably 860 mm.

[0045] <Roll products> Fig. 5 is a perspective view of a roll product of paper towels. Fig. 6 is an explanatory diagram of the theoretical circumference of a resin film, where (a) shows the case of two rolls and (b) shows the case of three rolls. Fig. 6 shows the roll-shaped paper towel package 10 as viewed from the direction along the axial direction of the roll product 20.

[0046] The roll product 20 of this embodiment is a roll of one ply of paper towels 20a wound into a roll, but is not limited thereto, and may be configured to wind up two or more plies of paper towels 20a into a roll. The roll product 20 has a core 21 such as a cylindrical paper core or a cylindrical space in the center, with an outer diameter (winding diameter) DR and an outer diameter of the core 21 DI. Of the two surfaces of the paper towel 20a, the surface facing the outside of the roll product 20 is called the front surface 22 of the paper towel 20a, and the surface facing the core 21 of the roll product 20 is called the back surface 23 of the paper towel 20a. The following are typical characteristics of the roll product 20. By adjusting these characteristics to a predetermined range, the effects of this embodiment, such as ease of opening and prevention of unexpected tearing of the perforation 15 when not required, are further improved.

[0047] (Volume length) The winding length of the roll product 20 is preferably 7 m or more and 23 m or less. By setting the winding length of the roll product 20 within the above range, the perforations 15 of the roll product 20 can be easily opened. For example, if the winding length of the roll product 20 is less than 7 m, the winding diameter of the roll product 20 becomes small, making it difficult to apply force to the perforations 15 when opening the roll product 20, and the perforations 15 tend to be difficult to open. On the other hand, if the winding length of the roll product 20 exceeds 23 m, the winding diameter becomes large, making it difficult to hold the roll product 20, and the perforations 15 tend to be difficult to open. The lower limit of the above range of the winding length of the roll product 20 is more preferably 10 m, and more preferably 13 m. The upper limit of the above range of the winding length of the roll product 20 is more preferably 20 m, and more preferably 18 m.

[0048] (Roll diameter) The roll diameter (roll diameter DR) of the roll product 20 is preferably 90 mm or more and 160 mm or less. By setting the roll diameter of the roll product 20 within the above range, the perforations 15 of the roll product 20 can be easily opened. For example, if the roll diameter of the roll product 20 is less than 90 mm, the roll diameter of the roll product 20 becomes small, making it difficult to apply force to the perforations 15 when opening the roll product 20, and the perforations 15 tend to be difficult to open. On the other hand, if the roll diameter of the roll product 20 exceeds 160 mm, the roll diameter becomes large, making it difficult to hold the roll product 20 in one's hand, and the perforations 15 tend to be difficult to open. The lower limit of the above range of the roll diameter of the roll product 20 is more preferably 100 mm, and more preferably 110 mm. The upper limit of the above range of the roll diameter of the roll product 20 is more preferably 140 mm, and more preferably 130 mm.

[0049] (Roll density) The roll density of the roll product 20 is 0.05 g / cm 3 More than 0.16g / cm 3 By setting the roll density of the roll product 20 in the above range, it is possible to achieve both ease of opening the perforations 15 and the difficulty of opening the perforations 15 by mistake. For example, when the roll density of the roll product 20 is 0.05 g / cm 3 If the roll density of the roll product 20 is less than 0.16 g / cm, the roll diameter becomes large, and when the package 10 is held by hand near the perforation 15, the fingers tend to get caught (sink into) the package 10, which may lead to erroneous opening. Also, the inward winding force may become too weak, causing the inward winding side of the roll product 20 to protrude in the axial direction, resulting in a defective product. 3 If the roll density of the roll product 20 exceeds 0.07 g / cm, the roll product 20 is difficult to deform, and the resin film 30 is in a taut state, which tends to lead to unintentional erroneous opening of the perforations 15 when the roll product 20 is dropped, etc. The lower limit of the above range of the roll density of the roll product 20 is 0.07 g / cm. 3 More preferably, it is 0.09 g / cm 3 The upper limit of the above range of the roll density of the roll product 20 is 0.15 g / cm. 3 More preferably, it is 0.13 g / cm3 It is more preferable that:

[0050] The roll density of the roll product 20 can be calculated by the following method. First, the roll density is calculated from the following formula (2). Roll density = roll mass / [{cross-sectional area of ​​the roll outer diameter (winding diameter DR) part} - (cross-sectional area of ​​the core outer diameter DI part)] x roll width (calculated based on 275 mm) (2) For example, if the roll mass per 275 mm of roll width is 327 g, the roll diameter DR is 122 mm, and the core outer diameter DI is 39 mm, the roll density = 327 g ÷ [{3.14 × (122 mm ÷ 2 ÷ 10) 2 -3.14×(39mm÷2÷10) 2}×(275mm÷10)]=0.11g / cm 3 When the roll product 20 does not have a core 21, the diameter of the central hole is taken as the core outer diameter DI. The roll mass does not include the mass of the core.

[0051] (Roll width) The roll width of the roll product 20 is preferably 180 mm or more and 350 mm or less. The lower limit of the above range of the roll width of the roll product 20 is more preferably 210 mm, and even more preferably 240 mm. The upper limit of the above range of the roll width of the roll product 20 is more preferably 325 mm, and even more preferably 300 mm.

[0052] (Core outer diameter) The core 21 is located at the center of the roll product 20 and is a part having a generally circular cross section around which the paper towel 20a is wound. The core 21 of the roll product 20 may have a paper tube inserted therein or may have a hollow portion. The core outer diameter DI is the outer diameter of the core 21 (paper tube, hollow portion, etc.) and is preferably 30 mm to 60 mm. By setting the core outer diameter DI within the above range, it is possible to wind an amount of paper towel 20a around one roll product 20 that will not deteriorate during its use. In addition, the roll diameter of the roll product 20 does not become larger than necessary, so that the ease of opening the perforation 15 is maintained. The lower limit of the above range of the core outer diameter DI is more preferably 34 mm, and more preferably 37 mm. The upper limit of the above range of the core outer diameter DI is more preferably 55 mm, and more preferably 50 mm.

[0053] (Theoretical circumference of resin film) The theoretical circumference P2 of the resin film 30 is the theoretical circumference P2 of the resin film 30 in the package 10 when two or three rolls of the roll product 20 are packaged with the resin film 30, and is calculated from the winding diameter DR of the roll product 20 as described below.

[0054] The theoretical perimeter P2 of the resin film 30 (hereinafter, sometimes simply referred to as the "theoretical perimeter P2") is preferably 580 mm or more and 880 mm or less. By setting the theoretical perimeter P2 within the above range, it is possible to achieve both ease of opening the perforation 15 and difficulty of opening it by mistake. For example, if the theoretical perimeter P2 of the resin film 30 is less than 580 mm, it becomes difficult to apply force to the perforation 15 when opening it, so that the perforation 15 tends to be difficult to open. On the other hand, if the theoretical perimeter P2 of the resin film 30 exceeds 880 mm, the perimeter becomes large, making it difficult to hold it in one's hand and difficult to open the perforation 15, or the roll product 20 tends to move easily inside the package 10, which tends to cause unnecessary breakage of the perforation 15. The lower limit of the above range of the theoretical perimeter P2 of the resin film 30 is more preferably 590 mm, and even more preferably 600 mm. Moreover, the upper limit of the above range of the theoretical perimeter P2 of the resin film 30 is more preferably 870 mm, and further preferably 860 mm.

[0055] The theoretical circumference P2 of the resin film 30 calculated from the winding diameter DR of the roll product 20 can be obtained, for example, as follows. Note that the following explanation is just an example, and even if the number of rolls of the roll product 20 is the same, the length may differ depending on the arrangement position of the roll product 20.

[0056] 6(a), the theoretical perimeter P2 of the resin film 30 when two rolls of the roll product 20 are stored is composed of two lengths L1 that are half the perimeter of the roll product 20 (roll diameter DR × pi (3.14) / 2) and four lengths L2 that are the radius (roll diameter DR / 2) of the roll product 20. Therefore, the theoretical perimeter P2 of the resin film 30 when two rolls of the roll product 20 are stored is expressed by the following formula (3). Theoretical circumference P2 in the case of two rolls = (L1 × 2) + (L2 × 4) = (reel diameter DR × pi / 2 × 2) + (reel diameter DR / 2 × 4) = (reel diameter DR × pi) + (reel diameter DR × 2) (3)

[0057] 6(b), the theoretical perimeter P2 of the resin film 30 when three rolls of the roll product 20 are stored in a row is made up of two lengths L1 that are half the perimeter of the roll product 20 (roll diameter DR × pi / 2) and eight lengths L2 that are the radius (roll diameter DR / 2) of the roll product 20. Therefore, the theoretical perimeter P2 of the resin film 30 when three rolls of the roll product 20 are stored is expressed by the following formula (4). Theoretical circumference P2 in the case of three rolls = (L1 × 2) + (L2 × 8) = (reel diameter DR × pi / 2 × 2) + (reel diameter DR / 2 × 8) = (reel diameter DR × pi) + (reel diameter DR × 4) (4)

[0058] (The ratio of the theoretical circumference of the package to the actual inner circumference) In the roll-shaped paper towel package 10, it is preferable that the ratio B of the theoretical circumference P2 of the resin film 30 to the actual inner circumference P1 of the package 10 is 70% or more and 100% or less. The ratio B can be expressed by the following formula (5). Ratio B = (theoretical circumference P2 / actual inner circumference P1 of package 10) × 100 (5) Setting the ratio B represented by the above formula (5) within the above range maintains the ease of opening the perforation 15 of the roll-shaped paper towel package 10 and prevents unintentional tearing of the perforation 15. The lower limit of the above range of the ratio B is more preferably 80%, and even more preferably 90%. (Relationship between theoretical circumference, roll density, and actual inner circumference of package)

[0059] In the roll-shaped paper towel package 10, the value C represented by the following formula (6) is preferably 5 or more and 16 or less. Value C = ((theoretical circumference P2 × roll density of roll product 20) / actual inner circumference P1 of package 10) × 100 (6) For example, if the theoretical circumference P2 is 617 mm and the roll density of the roll product 20 is 0.11 g / cm 3When the actual inner circumference P1 of the package 10 is 618 mm, the value C = (617 x 0.11) / 618 x 100 = 11.4. By setting the value C within the above range, the ease of opening the perforation 15 of the roll-shaped paper towel package 10 is maintained, and unintentional tearing of the perforation 15 can be prevented. The lower limit of the above range of the value C is more preferably 7, and even more preferably 9. The upper limit of the above range of the value C is more preferably 14, and even more preferably 12.

[0060] <Paper towels> The paper towel 20a used in this embodiment preferably contains synthetic fibers and pulp fibers. By using the paper towel 20a containing synthetic fibers and pulp fibers, the above-mentioned roll density, roll diameter, and the embossing depth and paper thickness described later can be easily set within a predetermined range, the perforation 15 can be easily torn when opening, the roll product 20 inside can be easily removed, and the perforation 15 can be prevented from being torn in unintended situations such as during processing, transportation, or dropping.

[0061] Examples of synthetic fibers contained in the paper towel 20a include nylon, vinylon, polyester, acrylic, polyethylene, polypropylene, polystyrene, etc., but in order to obtain a roll-shaped paper towel package 10 with good opening properties at the perforation 15 as in this embodiment, polyethylene and polypropylene are preferred, and polypropylene is more preferred. In addition, there is no restriction on the nonwoven fabric used as the synthetic fiber contained in the paper towel 20a, but spunbond nonwoven fabric is preferred. In addition, as pulp fibers, the content of NBKP (softwood bleached kraft pulp) is, for example, in the range of 50% by mass to 100% by mass, 70% by mass to 100% by mass, or 90% by mass to 100% by mass, and the content of LBKP (hardwood bleached kraft pulp) is, for example, in the range of 50% by mass or less, 30% by mass or less, or 10% by mass or less. As NBKP, for example, fibers made of radiata pine, slash pine, southern pine, lodgepole pine, spruce, and Douglas fir are preferred. It is also possible to use NUKP instead of NBKP and LUKP instead of LBKP. In this case, the synthetic fiber content in paper towel 20a is in the range of 5% to 45%, 9% to 38%, or 12% to 28%.

[0062] The pulp fiber content in the paper towel 20a is in the range of 55% to 95%, in the range of 62% to 91%, or in the range of 72% to 88%.

[0063] When paper towel 20a contains such synthetic fibers and pulp fibers, the roll diameter and roll density fall within an appropriate range, so that perforation 15 remains easy to open and perforation 15 can be prevented from tearing unintentionally.

[0064] (Sheet length (CD direction)) The sheet length of the paper towel 20a in the width direction (CD direction) of the roll product 20 is preferably 180 mm or more and 350 mm or less. By setting the CD direction length of the paper towel 20a within the above range, the roll product 20 can be easily removed. The lower limit of the above range of the CD direction length of the paper towel 20a is more preferably 210 mm, and even more preferably 240 mm. The upper limit of the above range of the CD direction length of the paper towel 20a is more preferably 325 mm, and even more preferably 300 mm.

[0065] (Sheet length (MD direction)) The length of the paper towel 20a in the MD direction (pitch) perpendicular to the CD direction is preferably 160 mm or more and 330 mm or less. By setting the length of the paper towel 20a in the MD direction within the above range, the roll diameter is in an appropriate range, and the ease of opening the perforation 15 is improved. The lower limit of the above range of the length of the paper towel 20a in the MD direction is more preferably 180 mm, and even more preferably 200 mm. The upper limit of the above range of the length of the paper towel 20a in the MD direction is more preferably 305 mm, and even more preferably 280 mm.

[0066] (Basic weight) The basis weight per ply of the paper towel 20a is 40 g / m 2 More than 150g / m 2 By setting the basis weight per ply of paper towel 20a within the above range, the roll diameter is within an appropriate range, perforations 15 can be easily opened, and unintentional opening of perforations 15 can be prevented. For example, when the basis weight per ply of paper towel 20a is 40 g / m 2 If the basis weight per ply of the paper towel 20a is less than 150 g / m2, the roll diameter becomes small, and it becomes difficult to apply force to the perforation 15 when opening the paper towel 20a, which tends to make it difficult to open the paper towel 20a. 2If the weight of the roll exceeds 48 g / m2, the roll mass becomes large, and the load on the perforation 15 becomes large when the roll is dropped or processed, making it easier for the perforation 15 to be opened unintentionally. 2 More preferably, it is 55 g / m 2 It is more preferable that the upper limit of the above range of the basis weight per ply of the paper towel 20a is 100 g / m 2 More preferably, it is 80 g / m 2 It is more preferable that:

[0067] Next, the main characteristics of the paper towel 20a will be described.

[0068] Fig. 7 is a cross-sectional view showing the embossments on the front and back of the paper towel. Fig. 8 is a diagram showing a height profile on the XY plane taken by a microscope, where (a) is shown in shading and (b) is shown in a cross-sectional curve. Fig. 9 is a diagram showing a contour curve output from the cross-sectional curve of Fig. 8(b).

[0069] (paper thickness) The paper thickness t1 (see FIG. 7) per ply of the paper towel 20a is preferably 200 μm or more and 1300 μm or less. By setting the paper thickness per ply of the paper towel 20a within the above range, the paper towel 20a can be made more convenient to use, not unnecessarily torn during use, the frequency of replacing the roll product 20 can be reduced, and unintentional opening of the perforation 15 can be prevented. For example, if the paper thickness per ply of the paper towel 20a is less than 200 μm, the roll diameter becomes small and it becomes difficult to apply force to the perforation 15 when opening the paper towel 20a, so that the perforation 15 tends to be difficult to open. On the other hand, if the paper thickness per ply of the paper towel 20a exceeds 1300 μm, the roll diameter becomes large and the roll product 20 becomes difficult to hold, so that the perforation 15 tends to be difficult to open. The lower limit of the above range of the thickness of each ply of paper towel 20a is more preferably 300 μm, and even more preferably 400 μm, and the upper limit of the above range of the thickness of each ply of paper towel 20a is more preferably 1100 μm, and even more preferably 900 μm.

[0070] Methods for adjusting the basis weight per ply and the paper thickness per ply of the paper towel 20a within the above ranges include specifying the calendering conditions of the base paper web (paper thickness and specific volume after calendering, difference in paper thickness before and after calendering) and embossing conditions.

[0071] (specific volume) The specific volume per ply of paper towel 20a is 5 cm 3 / g or more 15cm 3 / g or less. The specific volume is found by dividing the thickness of the paper towel 20a by the basis weight of the paper towel 20a. By setting the specific volume per ply of the paper towel 20a within the above range, it is possible to achieve a higher level of compatibility between ease of opening the perforation 15 and the difficulty of opening by mistake. For example, when the specific volume of the paper towel 20a is 5 cm 3 If the specific volume of the paper towel 20a is less than 15 cm / g, the ease of opening the perforation 15 tends to be poor.3 If the specific volume per ply of the paper towel 20a exceeds 6 cm3 / g, the paper towel 20a tends to be opened by mistake. 3 / g, more preferably 7cm 3 The upper limit of the above range of the specific volume per ply of the paper towel 20a is preferably 13 cm3 / g. 3 / g, and more preferably 11 cm 3 It is more preferable that the molecular weight is / g.

[0072] (embossed pattern) As shown in Fig. 7, the paper towel 20a is embossed. The embossing is preferably performed by a heat embossing process using a matched steel (steel match) in a roll winder. The shape of the embossed portion alone can be any shape, including a circle, an ellipse, a rectangle, a square, a floral pattern, a polygon, a letter, a line, a logo, etc., without any particular limitations. To obtain a paper towel 20a with a perforation that is easy to open at a predetermined roll diameter as in the present invention, a hexagonal shape is preferable.

[0073] (embossing depth on roll surface) The depth (hereinafter referred to as "embossing depth") t2 of the embossed pattern 24 (hereinafter sometimes referred to as "embossment") of the paper towel 20a on the roll surface of the roll product 20 is preferably 300 μm or more and 800 μm or less. If the embossing depth t2 is less than 300 μm, the fingers tend to slip and the product is difficult to open. On the other hand, if the embossing depth t2 exceeds 800 μm, the roll diameter becomes large and the product becomes soft, so that the fingers tend to dig in (sink) when the product is held near the perforation 15, which may lead to erroneous opening. The lower limit of the above range of the embossing depth t2 of the paper towel 20a on the roll surface is more preferably 400 μm, and even more preferably 500 μm.

[0074] (Measurement of embossing depth) The embossing depth can be determined, for example, by measuring the height difference of the embossing using a microscope as follows.

[0075] The microscope used can be a Keyence One-Shot 3D Measuring Macroscope VR-3100. The microscope image observation, measurement, and image analysis software can be the VR-H1A. The measurement conditions are a magnification of 12x and a field of view of 24mm x 18mm. The measurement magnification and field of view may be changed as appropriate depending on the desired size of the embossment. While 3D measuring machines and contour measuring machines measure points and lines, the microscope measures the entire surface, making it easier to see the overall shape and waviness.

[0076] Here, the height profile in Figure 8(b) is a (measured) cross-sectional curve that represents the unevenness of the actual sheet sample surface, but it also contains noise (steep peaks caused by fiber clumps on the sheet surface, whisker-like fibers, and fiber-free areas). When calculating the height difference of the unevenness, it is necessary to remove such noise peaks.

[0077] Therefore, as shown in Fig. 9, a contour curve is output from the cross-sectional curve of the height profile, and two maximum points P1 and P2 that are convex upward are determined on this contour curve, and the average value of P1 and P2 is set as the maximum depth value Max. Similarly, a minimum point that is convex downward is set as the minimum depth value Min.

[0078] In this way, the emboss depth is set to the maximum value Max-minimum value Min. The distance (length) on the XY plane between the maximum points P1 and P2 between the recess and the recess adjacent to the recess is defined as the length of one side a. The "contour curve" is a curve obtained by removing surface roughness components with wavelengths shorter than λc: 800 μm (where λc is the "filter that defines the boundary between the roughness component and the waviness component" described in JIS-B0601 "3.1.1.2") from the cross-sectional curve using a low-pass filter. If λc is set to be equal to or greater than the interval between P1 between adjacent embosses (this is called the emboss pitch), there is a possibility that the peak will be recognized as noise, so λc is set to be less than the emboss pitch. For example, if the emboss pitch is 800 μm or less, λc is set to be 250 μm. The distance between P1s of adjacent embossments is calculated by similarly determining P1 and P2 for the next embossment connected to the left or right in FIG. 9, and lining up the adjacent embossments as P1, P2, P1.

[0079] Similarly, the embossing depth and the length of side a in Fig. 8(a) are also measured, and the larger of the embossing depths of sides a and b is adopted as the embossing depth. The above measurements are performed on any 10 embossments 2 on the surface of the sheet, and the average value is adopted as the final embossing depth. In addition, the lengths of sides a and b are measured for each of the 10 embossments 2, and the average values ​​are adopted as the final lengths of sides a and b, with a x b being the average area.

[0080] When measuring embossing, the concave portion of the embossment is measured. In the case of single embossing or double embossing, the measurement surface is the front side, but in the case of matched steel (steel match), the front side may be convex, so in that case the measurement surface is the back side (concave side).

[0081] In addition, double embossing includes a type in which both the front and back sheets are embossed and the embossed convex portions are stacked facing each other, as well as a type in which only the front sheet is embossed and the back sheet is not embossed.

[0082] Double embossing can be done by any processing method (nested, pin-to-pin, embossing only on the front side (1 ply)).

[0083] When selecting any 10 embossments for measuring the embossments, the measurements are taken at a portion that is 10% of the roll length of the roll product 20 from the outer end of the roll product 20 (the position where the sheet begins to be used). For example, if the roll length is 30 m, the measurements are taken at a portion that is 30 m x 10% = 3 m from the end. Note that if the 10% portion of the roll length corresponds to a perforation, the outer side of the perforation is measured.

[0084] (Relationship between embossing depth and tensile strength of perforations) A value D expressed by the following formula (7) using the embossing depth t2 on the roll surface and the tensile strength of the perforations 15 is 15 or more and 55 or less. Value D = (embossing depth t2 of paper towel 20a / tensile strength of perforation 15) × 100 (7) For example, when the embossing depth t2 of the paper towel 20a is 600 μm and the tensile strength of the perforation 15 is 27 N / 50 mm, the value D is 600 / 27=22.2. By setting the value D in the above range, in the package 10 in which two or three rolls of the roll product 20 are packaged, the perforation 15 is easily torn when opening, and the roll product 20 inside can be easily removed, and the perforation 15 can be prevented from being torn in unintended situations such as during processing, transportation, or dropping. The lower limit of the above range of the value D is more preferably 17, and even more preferably 20. The upper limit of the above range of the value D is more preferably 45, and even more preferably 40.

[0085] (Method of manufacturing paper towels and rolled paper towels) As a method for manufacturing the paper towel 20a and the roll product 20, when the paper towel 20a is a kitchen towel containing synthetic fibers and pulp fibers, it can be manufactured, for example, in the following order: (1) laminating pulp fibers on a predetermined spunbond nonwoven fabric and hydroentangling, (2) embossing, and (3) rolling. In this case, in (1) hydroentangling of the manufacturing method, the pulp fibers are hydroentangled with the synthetic fibers to obtain a nonwoven fabric containing synthetic fibers and pulp fibers. The hydroentangling method is preferably performed by the method described in JP 2018-193634 A, for example.

[0086] Although the present invention has been described based on the above embodiment, the present invention is not limited to the contents of the above embodiment, and can be modified as appropriate without departing from the scope of the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. EXAMPLES

[0087] 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.

[0088] (Examples 1 to 14 and Comparative Examples 1 to 7) Under the conditions shown in Table 1, roll-shaped paper towel packages of Examples 1 to 14 and Comparative Examples 1 to 7 were produced by caramel-wrapping the roll products produced by the above-mentioned paper towels and the method for producing roll-shaped paper towels. The following two evaluations (evaluation of "ease of opening the perforation" and evaluation of "difficulty of opening by mistake") were performed on each roll-shaped paper towel package. The number of roll products stored in the roll-shaped paper towel packages of Examples 1 to 10 and 13 and Comparative Examples 1, 2, and 4 to 7 was two rolls, and the number of roll products stored in the roll-shaped paper towel packages of Examples 11, 12, and 14 and Comparative Example 3 was three rolls.

[0089] (Ease of opening perforations) The "ease of opening the perforation" was evaluated by a sensory panel of 20 people, who were asked to hold each unopened roll paper towel package at the perforation on the side with both hands and open the perforation by tearing it side to side with the thumbs of both hands. They were asked to choose "easy to open" or "difficult to open" and to rate it according to the following criteria. ◎: When 16 or more people answered "easy to open" ○: When 13 to 15 people answered "easy to open" △: When 10 to 12 people answered "easy to open" ×: When there are no "easy to open" people or when there are 1 to 9 people

[0090] (Difficulty in accidentally opening) The "difficulty of accidental opening" was evaluated based on the difficulty of unintentionally opening the perforation (mis-opening) during processing, transportation, dropping, etc., and 12 roll-shaped paper towel packages were placed vertically in the axial direction and packed in a cardboard box, and the packages were vibrated for 1 minute each at 1 round trip per second between 50 cm up and down and left and right. This was done 10 times (a total of 120 packages were evaluated), and then the accidental opening of the perforation (opening due to vibration) was confirmed, and the ratio (percentage, %) of the number of packages where the accidental opening occurred to the total number of packages was calculated as (number of packages where the accidental opening occurred / total number of packages) x 100, and the evaluation was performed according to the following criteria. The inner dimensions of the cardboard box were: long side: roll diameter of the roll product x 4, short side: roll diameter of the roll product x 3. ◎: The percentage of packages with incorrect openings to the total number of packages is 3% or less ○: The percentage of packages with erroneous openings to the total number of packages is more than 3% and 4% or less. △: The percentage of packages with erroneous openings to the total number of packages is more than 4% and 5% or less. ×: The ratio of the number of packages in which erroneous opening occurred to the total number of packages is greater than 5%.

[0091] The results are shown in Tables 1 and 2. Note that the "inner circumference of the packaging bag" in Tables 1 and 2 corresponds to the above-mentioned "actual inner circumference P1 of the resin film in the roll-shaped paper towel package," and the "theoretical circumference of the packaging bag" corresponds to the above-mentioned "theoretical circumference P2 of the resin film."

[0092] [Table 1]

[0093] [Table 2]

[0094] From Table 1, it can be seen that according to the present disclosure, in a package containing two or three rolls of roll products, the perforations can be easily torn when opened, allowing the roll products inside to be easily removed, and that it is possible to prevent the perforations from tearing in unintended situations such as during processing, transportation, or when dropped. [Explanation of symbols]

[0095] 10: Rolled paper towel packaging 11: Top 12: Bottom 13: Side 14: Heat seal adhesive 15: Perforation 15a: Perforation cut section 15b: Non-perforated part 20:Roll products 20a: Paper towels 24: Embossed pattern 30: Resin film

Claims

1. A roll-shaped paper towel package in which two or three rolls of a roll product made by winding paper towels into a roll are caramel-wrapped in a resin film, At least one of the top surface, bottom surface, and side surface of the roll-shaped paper towel package has a perforation for opening along any one of the roll products in a width direction of the roll product, The tensile strength of the perforation is 3 N / 50 mm or more and 53 N / 50 mm or less, The embossing depth of the paper towel on the surface of the roll product is 300 μm or more and 800 μm or less, The value represented by the formula: (embossing depth of the paper towel / tensile strength of the perforation)×100 is 15 or more and 55 or less. A roll-shaped paper towel package.

2. The perforations are arranged such that perforation cut portions and non-perforation cut portions are alternately arranged, The ratio of the sum of the total length of the perforation cut portion and the total length of the non-perforation cut portion to the total length of the non-perforation cut portion (total length of the non-perforation cut portion / (total length of the perforation cut portion+total length of the non-perforation cut portion)×100) is 25% or more and 75% or less.

2. The rolled paper towel package of claim 1.

3. The length of each of the perforations is 1 mm or more and 10 mm or less, The length of each of the non-perforated portions is 1 mm or more and 10 mm or less.

3. The rolled paper towel package of claim 2.

4. The tear strength of the resin film is 0.2 N or more and 3.0 N or less. The roll-shaped paper towel package according to any one of claims 1 to 3.

5. The thickness of the resin film is 20 μm or more and 50 μm or less. The roll-shaped paper towel package according to any one of claims 1 to 3.

6. The basis weight of the paper towel is 40 g / m ２ 150g / m or more ２ is less than or equal to The roll-shaped paper towel package according to any one of claims 1 to 3.

7. The roll density of the roll product is 0.05 g / cm ３ 0.16g / cm or more ３ is less than or equal to The roll-shaped paper towel package according to any one of claims 1 to 3.

8. The thickness of the paper towel is 200 μm or more and 1300 μm or less. The roll-shaped paper towel package according to any one of claims 1 to 3.

9. The diameter of the roll product is 90 mm or more and 160 mm or less. The roll-shaped paper towel package according to any one of claims 1 to 3.

10. In the roll-shaped paper towel package, the ratio of the theoretical circumference of the resin film to the actual inner circumference of the resin film ((theoretical circumference of the resin film / actual inner circumference of the resin film)×100) is 70% or more and 100% or less. The roll-shaped paper towel package according to any one of claims 1 to 3.

11. In the roll-shaped paper towel package, the value represented by the formula: ((theoretical circumference of the resin film x roll density of the roll product) / actual inner circumference of the resin film) x 100 is 5 or more and 16 or less. The roll-shaped paper towel package according to any one of claims 1 to 3.

12. The roll-shaped paper towel package has heat seal adhesive portions provided in a predetermined pattern on the top surface and the bottom surface, When viewed from the top and bottom surfaces, an angle formed by an imaginary line extending from the center of the roll product along which the perforation runs toward the perforation on the side surface and the pattern of the heat seal adhesive portion is 10° or more and 80° or less. The roll-shaped paper towel package according to any one of claims 1 to 3.

13. The paper towel contains synthetic and pulp fibers. The roll-shaped paper towel package according to any one of claims 1 to 3.

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