Packaging bag, sanitary paper packaging body, method for manufacturing packaging bag, set packaging bag, and method for manufacturing set packaging bag

Abstract

The packaging bag is a resin film packaging bag for packaging sanitary paper. The resin film contains components derived from packaging bag residues, and the load of the resin film when it has 2% elongation in the MD direction is more than 2.0N and less than 6.5N.

Description

Technical Field

[0001] This invention relates to packaging bags, sanitary paper packaging bodies, methods for manufacturing packaging bags, bulk packaging bags, and methods for manufacturing bulk packaging bags. Background Technology

[0002] Patent Document 1 discloses a bagged household tissue box containing household tissues within a bag body formed of a flexible film. An easy-tear line is formed on the surface of the bag body, allowing the tissues to be pulled out through a slit opened by tearing the easy-tear line. Patent Document 2 discloses a film packaging body with an easy-tear line for opening, wherein the easy-tear line is formed on a flexible film substrate containing a laminate of toilet paper.

[0003] Existing technical documents Patent documents Patent Document 1: Japanese Patent No. 2008-183034 Patent Document 2: Japanese Patent Application Publication No. 2018-177364 Summary of the Invention The problem that the invention aims to solve However, packaging bags containing tissues, paper towels, and other hygiene products can sometimes be difficult to open because the openings are designed to prevent damage during transportation and sales. Furthermore, from the perspective of a circular society and reducing environmental impact, there is a demand to promote the use of recycled resources such as biomass and recycled materials. However, when using recycled resources, it is often impossible to obtain the same level of transparency and physical property values ​​as with ordinary products.

[0004] The objective of this invention is to provide a packaging bag with low environmental impact and excellent openability.

[0005] Methods for solving problems One aspect of the present invention relates to a packaging bag made of resin film for packaging sanitary paper, wherein the resin film contains components derived from the packaging bag residue, and the resin film has a load of 2.0N to 6.5N when it is stretched by 2% in the MD direction (longitudinal direction).

[0006] The effects of the invention According to one aspect of the present invention, it is possible to provide a packaging bag with low environmental impact and excellent openability. Attached Figure Description

[0007]

【 Figure 1 The figure shows an example of a sanitary paper packaging body using the packaging bag of the embodiment.

[0008]

【 Figure 2 The figure shows an example of sanitary paper packaged in a packaging bag as described in the embodiment.

[0009]

【 Figure 3 Viewed from the top side Figure 1 The image.

[0010]

Figure 4

[0011] 【 Figure 5 The image shows an example of leftover packaging material.

[0012] 【 Figure 6 This is a flowchart illustrating some of the steps involved in the manufacturing process of sanitary paper packaging.

[0013] 【 Figure 7 [Image showing the master roll of the resin film that makes up the packaging bag]

[0014] 【 Figure 8 [Indicates] Figure 7 A diagram showing the state of the master roll after printing.

[0015] 【 Figure 9 [Indicates that] Figure 8 The image shows the state of the printed master roll after it has been cut.

[0016] 【 Figure 10 This is a flowchart illustrating some of the steps involved in the manufacturing process of packaging bags (the production of the resin film).

[0017] 【 Figure 11 The image shows an example of scrap material from a collection of packaging bags.

[0018] 【 Figure 12 [Image showing the master roll of resin film that makes up the packaged bag]

[0019] 【 Figure 13 A flowchart of a method for manufacturing sanitary paper packaging, including a method for manufacturing a collection of packaging bags.

[0020] 【 Figure 14 This is a flowchart illustrating a portion of the manufacturing process (packaging of multiple sheets of toilet paper) of a toilet paper packaging body that includes a method for manufacturing a combined packaging bag. Detailed Implementation

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Common parts in the drawings are sometimes given the same reference numerals and their descriptions are omitted. Additionally, the scales of the components in the drawings may sometimes differ from the actual scales.

[0022] In this specification, a 3D perpendicularly intersecting coordinate system with three axes (X, Y, and Z) is used to illustrate the orientation of the accompanying drawings. In each drawing, the left-right direction (the length direction of the toilet paper stack, packaging bag, or toilet paper package) is designated as the X-direction, the front-back direction (the direction of the short side of the toilet paper stack, packaging bag, or toilet paper package) is designated as the Y-direction, and the up-down direction (the height direction of the toilet paper stack, packaging bag, or toilet paper package) is designated as the Z-direction.

[0023] Furthermore, in this specification, deviations in each direction are permitted to a degree that do not impair the function or effect of the implementation. Additionally, perpendicular intersections may include substantially perpendicular intersections.

[0024] <Packaging bags and toilet paper packaging> Figure 1 This is a diagram illustrating an example of a sanitary paper packaging body using the packaging bag of the embodiment. Figure 2 This is a diagram illustrating an example of sanitary paper packaged in a packaging bag as described in the embodiment. Figure 3 Viewed from the top side Figure 1 The picture, Figure 4 It means Figure 1 A diagram showing the usage status of toilet paper packaging. Figure 5 This is an example of a diagram showing leftover materials from a packaging bag.

[0025] exist Figure 1 In this context, the toilet paper packaging body 100 comprises a toilet paper laminate 10 and a packaging bag 20. For example... Figure 2 As shown, the toilet paper stack 10 consists of multiple (multiple sheets or sets) of toilet paper 10A stacked together. The toilet paper stack 10 is housed in a packaging bag 20 such that the stacking direction LD of the toilet paper 10A is the height direction (Z direction). The toilet paper stack 10 can be pulled out one set at a time through the extraction outlet 30 (opening OP) formed in the packaging bag 20.

[0026] The shape of the toilet paper stack 10 is not particularly limited. For example, it can be stacked in the folded state, or in the alternating stacked state of each toilet paper 10A in the folded state (the so-called pull-out toilet paper stack), or in the simple stacked state of multiple toilet paper 10A sheets.

[0027] Furthermore, regarding the dimensions of the tissue paper laminate 10, the length of the packaging bag 20 in the longitudinal direction (X direction) can be approximately 150–250 mm, the width in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the packaging bag 20 can be approximately 70–150 mm, and the height in the height direction (Z direction) can be approximately 20–100 mm. Such a thin tissue paper laminate can be manufactured, for example, using a rotary or multi-stand laminating machine.

[0028] The form of 10A toilet paper is not particularly limited; for example, it can be used for facial tissues, paper towels, kitchen paper towels, toilet paper, and other types of tissue paper. These tissue papers also include those containing moisturizing ingredients (such as lotion facial tissues).

[0029] Furthermore, the use of the toilet paper 10A is not particularly limited; it can be used for industrial, household, and portable purposes. Additionally, as the toilet paper in this embodiment, household or portable facial tissues are preferred.

[0030] The number of layers of toilet paper 10A is not particularly limited, and it can be one or more layers, preferably one or two layers (two layers overlapping). In addition, the shape of toilet paper 10A is not particularly limited, but it is preferred that, for example, the outline shape of a single layer of toilet paper in the folded state is quadrilateral (rectangle, square, etc.).

[0031] The material of the 10A toilet paper is not particularly limited; for example, base paper made primarily of pulp can be used. The pulp composition can be any composition known for toilet paper. For example, the pulp proportion can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0032] Furthermore, there are no particular limitations on the pulp composition of the 10A sanitary paper. For example, softwood pulps such as NBKP (coniferous kraft pulp) or NUKP (unbleached softwood pulp) and hardwood pulps such as LBKP (broadwood kraft pulp) or LUKP (unbleached hardwood pulp) can be used in any proportion.

[0033] Furthermore, the ratio of hardwood pulp to softwood pulp in toilet paper is not limited, but is preferably 90:10 to 20:80, and more preferably a pulp composition in which hardwood pulp accounts for a greater proportion than softwood pulp. Additionally, waste paper pulp may also be used as the pulp in the toilet paper.

[0034] There is no specific limit to the grammage of 10A toilet paper, but depending on the number of layers, if it is paper, it is 5g / m². 2 Above 80g / m 2 The following is preferred: 10g / m 2 Above 60g / m 2The following is more preferably 10g / m 2 Above 45g / m 2 The following is a further explanation. Furthermore, in the case of nonwoven fabrics, 20 g / m² is preferred. 2 Above 100g / m 2 The following is a summary of the measurements. Additionally, the weight was determined according to JIS P 8124 (2011).

[0035] Furthermore, there is no particular limitation on the thickness of the toilet paper, and the paper thickness measured under the conditions specified in JIS P 8111 (1998) can be used. For example, when the toilet paper 10A is paper, the thickness of each two layers is 50 μm to 600 μm, preferably 60 μm to 500 μm, and more preferably 130 μm to 400 μm.

[0036] In addition, embossing can also be applied to 10A toilet paper. Such embossing can be performed using known embossing methods. There are no particular limitations on the embossing methods; for example, steel-to-rubber and steel-to-steel methods can be used.

[0037] The packaging bag 20 is made of resin film. The composition of the resin film constituting the packaging bag 20 is not particularly limited; for example, resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), and polyamide (PA) can be used. Furthermore, high-density polyethylene, low-density polyethylene, etc., can be used as the polyethylene.

[0038] Among these, polyethylene, polypropylene, and polyethylene terephthalate are preferred for their flexibility, excellent handling, high sealing performance during heat sealing, and low cost. Furthermore, polyethylene is preferred for its odorlessness, excellent water and chemical resistance, and ability to be mass-produced at low cost.

[0039] In addition to resin, the resin film may also contain additives such as stabilizers and fillers. Furthermore, the color of the resin film in this invention (the color in its unprinted state) is white, milky white, or transparent.

[0040] The form of the resin film forming the packaging bag 20 is not particularly limited. It can be a single-layer film formed by the above-mentioned resin as a single layer, a laminated film formed by stacking the above-mentioned resin, a film formed by bonding or laminating the above-mentioned resin with pulp paper or non-woven fabric, or a mixed film formed by a mixture of the above-mentioned two or more resins.

[0041] The thickness of the resin film forming the packaging bag 20 is not particularly limited, but is preferably 20 μm to 100 μm, more preferably 25 μm to 70 μm, and even more preferably 30 μm to 50 μm. By setting the thickness of the resin film to 20 μm or more, sufficient strength of the packaging bag 20 as the housing for the tissue paper laminate 10 can be ensured. Furthermore, by setting the thickness of the resin film to 100 μm or less, both the flexibility of the packaging bag 20 and its lightweight nature can be ensured.

[0042] The shape of the packaging bag 20 is not particularly limited, but it is generally rectangular when the tissue paper stack 10 is contained within the packaging bag 20. This generally rectangular packaging bag 20 has a top surface 21, a bottom surface 22, a front surface 23, a back surface 24, a side surface 25, and a side surface 26. Within the packaging bag 20, as... Figure 1 , Figure 3 , Figure 4 As shown, the top surface 21 and the bottom surface 22 are opposite each other in the vertical direction (Z direction), the front surface 23 and the back surface 24 are opposite each other in the width direction (Y direction), and the side surface 25 and the side surface 26 are opposite each other in the length direction (X direction). In addition, the side surfaces 25 and 26 are continuous with the top surface 21, the bottom surface 22, the front surface 23 and the back surface 24.

[0043] The dimensions of the packaging bag 20 are not particularly limited. For example, the length of the packaging bag 20 in the longitudinal direction (X direction) can be approximately 150–250 mm, the length of the shorter side (Y direction) perpendicular to the longitudinal direction (X direction) of the packaging bag 20 can be approximately 70–150 mm, and the height in the vertical direction (Z direction) can be approximately 20–100 mm. Additionally, the dimensions of the packaging bag 20 are as follows: Figure 1 , Figure 2 The dimensions shown are those of the tissue paper stack 10 stored in the packaging bag 20.

[0044] Furthermore, there are no particular limitations on the packaging method of the packaging bag 20. In this embodiment, for example, packaging that involves folding and sealing both ends of the tubular resin film (candy packaging), packaging that involves sealing both ends or either end of the folded tubular resin film (pillow packaging), packaging that involves heating a heat-shrinkable resin film to make it adhere tightly to the packaged object (shrink packaging), or a combination of these methods, etc.

[0045] In this embodiment, the packaging bag 20 is sealed in a candy-like manner on a pair of opposite sides (sides 25 and 26 in this embodiment) in the longitudinal direction (X direction).

[0046] The top surface 11, bottom surface 12, long side surface 13, long side surface 14, short side surface 15, and short side surface 16 of the toilet paper stack 10 stored in the packaging bag 20 face the top surface 21, bottom surface 22, front surface 23, back surface 24, side surface 25, and side surface 26 of the packaging bag 20, respectively.

[0047] The top surface 21 of the packaging bag 20 is provided with an outlet 30. For example... Figure 4 As shown, the dispensing outlet 30 is configured to dispense toilet paper 10A. The dispensing outlet 30 is formed by an opening OP. The opening OP constituting the dispensing outlet 30 is as follows: Figure 1 , Figure 3 As shown, it can also be constructed by tearing open the tear line M (intermittent cut).

[0048] The shape of the opening OP constituting the outlet 30 is not particularly limited, and can be, for example, straight, elongated rectangle, ellipse, racetrack shape, gourd shape (or dumbbell shape) when viewed from above. Here, gourd shape (or dumbbell shape) refers to an ellipse with a narrow central portion. Among these, straight, ellipse, racetrack shape, and gourd shape (or dumbbell shape) are preferred, racetrack shape and gourd shape (or dumbbell shape) are more preferred, and gourd shape (or dumbbell shape) is even more preferred.

[0049] The outlet 30, viewed from above, is gourd-shaped (or dumbbell-shaped). Figure 1 , Figure 3 , Figure 4 As shown, the width of the central portion 31 of the outlet 30 is narrower than the width of the ends 32 and 33 of the outlet 30. The shape of the central portion 31 of the outlet 30 is not particularly limited, for example, it is a long and narrow rectangle. The shape of the ends 32 and 33 of the outlet 30 is not particularly limited, for example, it is elliptical or fan-shaped.

[0050] When the outlet 30 is gourd-shaped (or dumbbell-shaped) when viewed from above, the width (width in the Y direction) of the central portion 31 of the outlet 30 is not particularly limited, but is preferably 1 mm to 10 mm, more preferably 3 mm to 8 mm, and even more preferably 4 mm to 6 mm.

[0051] The width (maximum width in the Y direction) of the two ends 32 and 33 of the outlet 30 is not particularly limited, but is preferably 5 mm or more and 50 mm or less, more preferably 10 mm or more and 45 mm or less, and even more preferably 15 mm or more and 40 mm or less.

[0052] The ratio of the width (width in the Y direction) of the central portion 31 of the outlet 30 to the width (maximum width in the Y direction) of the two ends 32 and 33 of the outlet 30 is not particularly limited, but is preferably 5% to 40%, more preferably 7% to 30%, and even more preferably 10% to 25%.

[0053] The total length of the outlet 30 in the longitudinal direction (X direction) is not particularly limited. For example, the total length in the longitudinal direction (X direction) relative to the top surface 21 of the packaging bag 20 of the sanitary paper packaging body 100 is 40% to 100%, preferably 45% to 90%, and more preferably 50% to 80%.

[0054] The ratio of the length of the central portion 31 of the outlet 30 in the longitudinal direction (X direction) to the total length of the outlet 30 in the longitudinal direction (X direction) is not particularly limited, but it is preferably 35% to 75%, more preferably 40% to 70%, and even more preferably 45% to 65%.

[0055] The proportion of each length of the two ends 32 and 33 of the outlet 30 in the length direction (X direction) to the total length of the outlet 30 in the length direction (X direction) is not particularly limited, but is preferably 5% to 45%, more preferably 10% to 30%, and even more preferably 15% to 25%.

[0056] In the sanitary paper packaging 100 of the present invention, the resin film constituting the packaging bag 20 contains components derived from packaging bag residue. In this specification, packaging bag residue (hereinafter sometimes simply referred to as residue) refers to waste or excess material generated from the resin film used to make the packaging bag from the resin film used for packaging sanitary paper, which has not become the waste product of the packaging bag.

[0057] The composition derived from packaging bag residue is not particularly limited; examples include resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), and polyamide (PA). Additionally, high-density polyethylene and low-density polyethylene can also be cited as examples of polyethylene.

[0058] Among these, polyethylene, polypropylene, and polyethylene terephthalate are preferred for their flexibility, excellent handling, high sealing performance during heat sealing, and low cost. Furthermore, polyethylene is preferred for its odorlessness, excellent water and chemical resistance, and ability to be mass-produced at low cost.

[0059] The packaging bags used as a source of waste material are resin film packaging bags made from packaging tissue paper. Furthermore, the waste material from the packaging bags is preferably the scraps from the resin film used to make the bags. For example, the scraps from the resin film used to make the packaging bags... Figure 5 As shown, this is the remaining portion (also called the trimmed edge) 220 after the printed portion 210 required for the packaging bag is removed from the packaging bag material 200.

[0060] The content of components derived from residues in the resin film constituting the packaging bag 20 is preferably 2% by mass or more, more preferably 2.5% by mass or more, and even more preferably 3% by mass or more. Furthermore, the upper limit of the content of components derived from residues in the resin film constituting the packaging bag 20 is arbitrary, but from the viewpoint of not reducing the flexibility of the packaging bag, it is preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less.

[0061] Furthermore, since the resin film packaging bags used for packaging sanitary paper are usually printed, the packaging bag residues used for such bags contain printing components.

[0062] Therefore, in the packaging bag 20 of the present invention, the content of the printing component derived from the packaging bag residue is preferably 0.2% by mass or less, more preferably 1.5% by mass or less, and even more preferably 1.0% by mass or less. Furthermore, the lower limit of the content of the printing component derived from the packaging bag residue is arbitrary, but from the viewpoint of controlling the color of the packaging bag as much as possible, 0% by mass is preferred.

[0063] The resin film constituting the packaging bag 20 of the present invention has a load of 2.0N to 6.5N when it is stretched by 2% in the MD direction, preferably 2.5N to 6.0N, and more preferably 3.0N to 5.5N. Furthermore, the MD direction of the resin film indicates the flow direction of the resin constituting the resin film.

[0064] Here, the load at 2% elongation of the resin film is a value determined according to JIS K 7127 (1999), which represents the load when the distance between the two marks of the resin film is 2% longer than the original horizontal distance.

[0065] Furthermore, the load at 2% elongation in the TD direction is 2.5N to 7.0N, preferably 3.0N to 6.5N, and more preferably 3.5N to 6.0N. Additionally, the TD direction of the resin film refers to a direction perpendicular to the MD direction (the flow direction of the resin constituting the resin film).

[0066] The tear strength in the MD direction of the resin film constituting the packaging bag 20 of the present invention is preferably 700 mN or more and 2000 mN or less, more preferably 800 mN or more and 1800 mN or less, and even more preferably 900 mN or more and 1500 mN or less. Here, the tear strength of the resin film is a value measured according to JIS P 8116 (2000), which represents the strength when the resin film is torn.

[0067] Furthermore, the tear strength in the TD direction is preferably 9500mN or more and 13000mN or less, more preferably 10000mN or more and 12500mN or less, and even more preferably 10500mN or more and 11900mN or less.

[0068] The tensile modulus of elasticity in the MD direction of the resin film constituting the packaging bag 20 of the present invention is preferably 150 MPa or more and 450 MPa or less, more preferably 200 MPa or more and 430 MPa or less, and even more preferably 230 MPa or more and 400 MPa or less. Here, the tensile modulus of elasticity of the resin film is a value measured according to JIS K 7127 (1999), which represents the ratio of tensile stress per unit cross-sectional area of ​​the resin film to strain generated in the stress direction.

[0069] Furthermore, the tensile modulus in the TD direction is preferably 250 MPa or more and 550 MPa or less, more preferably 270 MPa or more and 530 MPa or less, and even more preferably 300 MPa or more and 500 MPa or less.

[0070] The elongation in the MD direction of the resin film constituting the packaging bag 20 of the present invention is preferably 500% or more and 850% or less, more preferably 550% or more and 800% or less, and even more preferably 600% or more and 750% or less. Here, the elongation in the resin film is a value measured according to JIS K 7127 (1999), which represents the elongation at which the resin film is stretched at a specified speed until it breaks.

[0071] Furthermore, the elongation in the TD direction is preferably 550% to 900%, more preferably 600% to 850%, and even more preferably 650% to 800%.

[0072] The tensile strength in the MD direction of the resin film constituting the packaging bag 20 of the present invention is preferably 10 N / cm or more and 30 N / cm or less, more preferably 12 N / cm or more and 25 N / cm or less, and even more preferably 15 N / cm or more and 20 N / cm or less. Here, the tensile strength of the resin film is a value measured according to JIS K 7127 (1999), which represents the force required to stretch the resin film until it breaks.

[0073] The tensile strength in the TD direction of the resin film constituting the packaging bag 20 of the present invention is preferably 10 N / cm or more and 30 N / cm or less, more preferably 12 N / cm or more and 25 N / cm or less, and even more preferably 15 N / cm or more and 20 N / cm or less.

[0074] In the packaging bag 20 of the present invention, as described above, the resin film of the packaging bag 20 constituting the packaging sanitary paper 10A contains components derived from packaging bag residue, and therefore the packaging bag 20 made of such resin film has a low environmental impact.

[0075] Furthermore, the resin film constituting the packaging bag 20 contains components derived from packaging bag residue, thereby achieving a load of 2.0N to 6.5N at 2% elongation in the MD direction. This resin film is not easily stretched, allowing a slit knife to easily penetrate when forming the easy-tear line for opening, resulting in excellent opening properties for the packaging bag 20. In addition, by using this resin film to construct the packaging bag, the amount of lubricant used can be reduced.

[0076] In the packaging bag 20 of the present invention, as described above, since the packaging bag scraps are scraps of the packaging bag 20, the printing components in the packaging bag scraps are less. Therefore, in the packaging bag made of a resin film containing such scraps, the color of the packaging bag 20 can be close to the color of the packaging bag made of non-recycled or virgin materials.

[0077] Therefore, even if the resin film constituting the packaging bag 20 contains components derived from packaging bag residues, various colors can be printed on the packaging bag according to the manufacturer's needs. This promotes material reuse in the sanitary paper industry and drives the development of a sustainable society.

[0078] In the packaging bag 20 of the present invention, as described above, the resin film constituting the packaging bag 20 contains components derived from packaging bag residue, and its load at 2% elongation in the TD direction can reach 2.5N or more and 7.0N or less. Such a resin film is less prone to elongation, and the slit knife can more easily enter when forming the easy-tear line for opening. Therefore, the packaging bag 20 made of such a resin film has superior opening properties.

[0079] In the packaging bag 20 of the present invention, as described above, the resin film constituting the packaging bag 20 contains components derived from packaging bag residue, and its tear strength in the MD direction can reach 700mN to 2000mN. Such a resin film is less prone to elongation, and a slit knife can more easily penetrate when forming an easy-tear line for opening, thus further improving the openability of the packaging bag 20 made of such a resin film.

[0080] In the packaging bag 20 of the present invention, as described above, the resin film constituting the packaging bag 20 contains components derived from packaging bag residue, and its tensile modulus in the MD direction can reach 150 MPa or more and 450 MPa or less. Since this resin film easily maintains its shape, the toilet paper 10A stored in the packaging bag 20 made of this resin film can be pulled out one sheet at a time until the last sheet, thus the toilet paper 10A has excellent pull-out properties.

[0081] In the packaging bag 20 of the present invention, the resin film constituting the packaging bag 20, as described above, contains components derived from packaging bag residue, and its tensile modulus in the TD direction can reach 250 MPa or more and 500 MPa or less. Because this resin film easily maintains its shape, the packaging bag 20 made of this resin film has excellent pull-out properties for the sanitary paper 10A.

[0082] In the packaging bag 20 of the present invention, the resin film constituting the packaging bag 20, as described above, contains components derived from packaging bag residue, and its tensile elongation in the MD direction can reach 500% to 850%. Such a resin film is less prone to elongation, and a slit knife can more easily enter when forming an easy-tear line for opening, thus further improving the openability of the packaging bag 20 made of such a resin film.

[0083] In the packaging bag 20 of the present invention, the resin film constituting the packaging bag 20, as described above, contains components derived from packaging bag residue, and its tensile strength in the MD direction can reach 10 N / cm or more and 30 N / cm or less. This resin film is more likely to maintain its shape, and therefore the packaging bag 20 made of this resin film can improve the pull-out properties of the sanitary paper 10A.

[0084] In the packaging bag 20 of the present invention, since the resin film constituting the packaging bag 20 contains more than 2% by mass of components derived from packaging bag residue, the resin film constituting the packaging bag 20 becomes practically less prone to stretching, and thus the packaging bag 20 with excellent opening properties can be obtained with high precision.

[0085] In the packaging bag 20 of the present invention, as described above, since the content of printing components in the components derived from packaging bag scrap is less than 0.2% by mass, even if the components derived from packaging bag scrap include printing components, the color of the packaging bag 20 can be close to the color of packaging bags made from non-recycled or virgin materials. Therefore, in the packaging bag 20 of the present invention, even if packaging bag scrap is used in the resin film constituting the packaging bag 20, various colors can be printed on the packaging bag according to the manufacturer's needs.

[0086] Furthermore, the toilet paper packaging 100 of the present invention, by constituting a toilet paper packaging body that houses toilet paper 11A within the aforementioned packaging bag 20, can achieve the same effects as the aforementioned packaging bag 20. That is, in the toilet paper packaging 100 of the present invention, the resin film constituting the packaging bag 20 that packages the toilet paper 11A contains components derived from packaging bag residue. Therefore, the toilet paper packaging 100 obtained by packaging toilet paper 11A with this resin film has a low environmental impact, excellent opening properties, and excellent toilet paper extraction properties.

[0087] Furthermore, in the sanitary paper packaging body 100 of the present invention, since the residual material of the packaging bag is the scrap of the resin film used in the packaging bag, the color of the packaging bag can be close to the color of the packaging bag made of non-recycled or virgin materials.

[0088] <Methods for Manufacturing Packaging Bags> Figure 6 This is a flowchart illustrating some of the steps involved in the manufacturing process of packaging bags. Figure 7 This is a diagram showing the master roll of the resin film that makes up the packaging bag. Figure 8 It means to Figure 7 A picture showing the state of the master roll after printing. Figure 9 It means to Figure 8 The image shows the state of the printed master roll after it has been cut. Figure 10 This is a flowchart illustrating part of the manufacturing process of packaging bags (the production of resin film).

[0089] The method for manufacturing the packaging bag of the present invention includes a step of making a master roll of resin film using the residue of the packaging bag.

[0090] Specifically, such as Figure 6 As shown, the method for manufacturing a packaging bag according to the present invention includes a step of making a resin film master roll (S1), a step of cutting the master roll (S2), a step of collecting packaging bag scraps (S3), and a step of making a resin film master roll using the scraps (S4). Furthermore, the step of making a resin film master roll using the scraps (S4) is an example of the step of making a resin film master roll using packaging bag scraps in the packaging bag manufacturing method of the present invention.

[0091] In the process (S1) of making the resin film master roll, a long strip of resin film master roll 1 is made. Multiple packaging bags, described later, can be obtained from the long strip of resin film master roll 1. The long strip of resin film master roll 1, as... Figure 7 As shown, it is obtained by joining the ends of long, flat, sheet-like resin films together in the width direction to form a cylindrical shape.

[0092] On the obtained long, rolled master roll 1, the area 2 that will subsequently become a packaging bag (hereinafter referred to as the printing area) is further printed with P. In addition, the area that will subsequently become the trim (hereinafter referred to as the trim area) T is not printed with P.

[0093] In the process of cutting the master roll (S2), the long strip of resin film master roll 1 is cut into a predetermined size. The cutting of the master roll 1 is carried out while the long strip of master roll 1 is being conveyed along a predetermined conveying direction, and simultaneously... Figure 8 The process is carried out at predetermined intervals along the cutting line C, as shown.

[0094] By cutting the master volume 1, such as Figure 9 As shown, multiple rolls of resin film 3 constituting packaging bags can be obtained. Furthermore, the two ends of the master roll 1 are cut to become scraps 4. Moreover, scrap 4 is an example of packaging bag residue in the packaging bag manufacturing method of the present invention. Additionally, scrap 4 is also an example of resin film scraps used for packaging bags in the packaging bag manufacturing method of the present invention.

[0095] In the step (S4) of making a resin film master roll using waste material, a known resin film manufacturing method may be included. (See reference...) Figure 10 This section explains the general resin film manufacturing process. For example... Figure 10 As shown, the process of making resin films using waste materials ( Figure 6 S4) may include: producing scrap pellets from recycled scrap 4. Figure 10 S41), melting the resin material containing the produced residual particles ( Figure 10 S42), and formed into a thin film ( Figure 10 (S43).

[0096] Production of residual material pellets ( Figure 10 (S41) Alternatively, well-known methods can be used. For example, such as... Figure 10 As shown, packaging bag scraps (edges, etc.) can be sorted and foreign matter removed, and the scraps can be crushed and washed. Subsequently, the material is melted, shaped into granules, and after cooling and dehydration, the scrap granules can be obtained.

[0097] In the process (S4) of making a resin film master roll using the waste material, the obtained waste material particles can be used alone, in which case a resin film composed of the waste material will be produced. Alternatively, the waste material particles can also be used with, for example, unrecycled resin particles (virgin resin particles). In this case, the waste material particles and unrecycled resin particles or unrecycled resin materials can be mixed in any proportion.

[0098] However, the higher the proportion of waste material particles, the higher the proportion of renewable materials. From the perspective of achieving a sustainable society, it is preferable to have as high a proportion of waste material particles as possible. For example, in the recycled resin film, the proportion of components derived from packaging bag waste materials can preferably be 20% by mass or more, and more preferably 30% by mass or more.

[0099] Furthermore, from the viewpoint of improving the strength of the produced resin film, the resin material melting process ( Figure 10 In S42), it is preferable to use unrecycled resin material (virgin resin material). The proportion of material from the residue (residue particles) used is preferably such that, when the strength of the resin film made from the unrecycled resin material is set to 100%, the strength decrease of the resulting film is suppressed to 10% or less (i.e., the strength of the resulting film reaches 90% or more). From the above viewpoint, for example, in the recycled resin film, the proportion of unrecycled resin material (virgin resin material) is preferably 70% by mass or more, more preferably 80% by mass or more.

[0100] In the formation of thin films ( Figure 10 In S43, known methods such as blow molding, T-die method, and extrusion molding can be used.

[0101] In the packaging bag manufacturing method of the present invention, the above-mentioned packaging bag can be obtained by performing a step of making a resin film master roll using packaging bag residue. That is, in the packaging bag manufacturing method of the present invention, since packaging bag residue is used in the resin film used to constitute the packaging bag for toilet paper, packaging toilet paper with this resin film can result in a packaging bag with low environmental impact, excellent opening properties, and excellent toilet paper removal properties.

[0102] Furthermore, in the packaging bag manufacturing method of the present invention, since the packaging bag scrap is the scrap of the resin film used for the packaging bag, by packaging sanitary paper with the resin film using such scrap, it is possible to obtain a packaging bag whose color is close to that of a packaging bag made of non-recycled or virgin materials.

[0103] Furthermore, the packaging bag manufacturing method of the present invention, as described above, includes a step of making a master roll (S1), a step of cutting the master roll (S2), a step of collecting scrap material (S3), and a step of making a master roll using the scrap material (S4), but this series of steps is as follows Figure 6 The result shown can be repeated.

[0104] In this repeatable series of processes, starting from the second round, resin films made from recycled materials (recycled resin films) can be used. This establishes a circular route for the reuse of resin materials. Therefore, initiatives promoting material reuse in the sanitary paper sector contribute to achieving sustainable development goals.

[0105] <Collection Packaging Bag> Figure 11 This figure shows an example of remnants from a bulk packaging bag. The bulk packaging bag of the present invention is used to package multiple rolls of toilet paper. The multiple rolls of toilet paper packaged in the bulk packaging bag can be in the state of the toilet paper packaging body of the present invention described above, or they can be rolls of toilet paper not packaged in a packaging bag.

[0106] The communal packaging bag of the present invention is made of a resin film, and the resin film constituting the communal packaging bag contains components derived from remnants of the communal packaging bag. Therefore, the communal packaging bag made of this resin film has a lower environmental impact.

[0107] Furthermore, the resin film constituting the bulk packaging bag contains components derived from the scrap material of the bulk packaging bag, and its load at 2% elongation in the MD direction is 2.0N to 6.5N. This resin film is not easily stretched, and a slit knife can easily enter when forming the easy-tear line for opening. Therefore, bulk packaging bags made of this resin film have excellent openability.

[0108] In the composite packaging bag of the present invention, the composition derived from the composite packaging bag residue is not particularly limited, and examples include resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), and polyamide (PA). Additionally, high-density polyethylene and low-density polyethylene can also be used as polyethylene.

[0109] Among these, polyethylene, polypropylene, and polyethylene terephthalate are preferred due to their flexibility, excellent handling, high sealing performance during heat sealing, and low cost. Furthermore, polyethylene is preferred for its odorless nature, excellent water and chemical resistance, and ability to be mass-produced at low cost.

[0110] Furthermore, from the viewpoint of ensuring the stability of the resin film constituting the bulk packaging bag, the composition of the residue from the bulk packaging bag is preferably the same as the composition of the resin film constituting the bulk packaging bag. For example, if the resin film constituting the bulk packaging bag is polyethylene, then the composition of the residue from the bulk packaging bag is preferably also polyethylene.

[0111] In the collective packaging bag of the present invention, the source of the waste material is a collective packaging bag for packaging multiple toilet paper packages. Furthermore, the waste material of the collective packaging bag is preferably scraps from the resin film used in the collective packaging bag and / or scraps from the resin film used to make individual packaging bags from the resin film used for packaging toilet paper.

[0112] Resin film scraps used for packaging bags, such as Figure 11The image shows the remaining portion (cut edge) 320 after the required portion 310 of the packaging bag is removed from the bulk packaging bag material 300. Additionally, the resin film scraps used to make individual packaging bags from resin film for packaging toilet paper are, for example, as described above. Figure 5 The cut edge 220 in the packaging bag material 200 shown.

[0113] In the communal packaging bag of the present invention, since the packaging bag scrap is the scrap of the resin film used for the communal packaging bag, the printing component in the communal packaging bag scrap is less. Therefore, in the communal packaging bag made of the resin film containing such scrap, the color of the communal packaging bag can be close to the color of the communal packaging bag made of non-recycled or virgin materials.

[0114] Therefore, even if the resin film constituting the bulk packaging bag contains components derived from bulk packaging bag residues, various colors can be printed on the bulk packaging bag according to the manufacturer's needs. This promotes material reuse in the sanitary paper industry and drives the development of a sustainable society.

[0115] In the communal packaging bag of the present invention, as described above, the resin film constituting the communal packaging bag contains components derived from the residual material of the communal packaging bag, and its load at 2% elongation in the TD direction can reach 2.5N or more and 7.0N or less. This resin film is less prone to elongation, and the slit knife can enter more easily when forming the easy-tear line for opening. Therefore, the communal packaging bag made of this resin film has superior opening performance.

[0116] In the communal packaging bag of the present invention, as described above, the resin film constituting the communal packaging bag contains components derived from remnants of the communal packaging bag, and its tear strength in the MD direction can reach 700mN to 2000mN. This resin film is less prone to elongation, and the slit knife can more easily penetrate when forming the easy-tear line for opening, thus further improving the openability of the communal packaging bag made of this resin film.

[0117] In the communal packaging bag of the present invention, as described above, the resin film constituting the communal packaging bag contains components derived from the residue of the communal packaging bag, and its tensile modulus in the MD direction can reach 150 MPa or more and 450 MPa or less. Since this resin film easily maintains its shape, the sanitary paper package stored in the communal packaging bag can be stably stored in the communal packaging bag.

[0118] In the communal packaging bag of the present invention, the resin film constituting the communal packaging bag, as described above, contains components derived from the remnants of the communal packaging bag, and its tensile modulus in the TD direction can reach 250 MPa or more and 500 MPa or less. Since this resin film easily maintains its shape, the sanitary paper package stored in the communal packaging bag can be stably stored in the communal packaging bag made of this resin film.

[0119] In the communal packaging bag of the present invention, the resin film constituting the communal packaging bag, as described above, contains components derived from the residual material of the communal packaging bag, and its tensile elongation in the MD direction can reach 500% to 850%. This resin film is less prone to elongation, and the slit knife can more easily enter when forming the easy-tear line for opening, thus further improving the openability of the communal packaging bag made of this resin film.

[0120] In the compartment packaging bag of the present invention, the resin film constituting the compartment packaging bag, as described above, contains components derived from the residue of the compartment packaging bag, and its tensile strength in the MD direction can reach 10 N / cm or more and 30 N / cm or less. This resin film is more likely to maintain its shape, and therefore, the sanitary paper package stored in the compartment packaging bag can be stably stored in the compartment packaging bag made of this resin film.

[0121] In the communal packaging bag of the present invention, by including more than 2% by mass of components derived from communal packaging bag residue in the resin film constituting the communal packaging bag, the resin film constituting the communal packaging bag is effectively not prone to elongation, thereby enabling the communal packaging bag with excellent opening properties to be obtained with high precision.

[0122] In the composite packaging bag of the present invention, as described above, since the content of printing components in the components derived from the composite packaging bag residue is less than 0.2% by mass, even if the components derived from the composite packaging bag residue include printing components, the color of the composite packaging bag can be close to the color of packaging bags made from non-recycled or virgin materials. Therefore, in the composite packaging bag of the present invention, various colors can be printed on the composite packaging bag according to the manufacturer's needs.

[0123] <Manufacturing Method of Combination Packaging Bags> Figure 12 This diagram shows the master roll of the resin film constituting the compartment packaging bag. The compartment packaging bag manufacturing method of the present invention is a method for manufacturing the above-mentioned compartment packaging bag, including a step of making the compartment packaging bag using residual material from the compartment packaging bag.

[0124] Specifically, with Figures 6-10Similarly, the packaging bag manufacturing method shown can also be used to manufacture bulk packaging bags. Furthermore, in the bulk packaging bag manufacturing method of the present invention, the parts common to the packaging bag manufacturing method described above will be marked with the same or corresponding symbols and their descriptions will be omitted.

[0125] The method for manufacturing the communal packaging bag of the present invention, such as Figure 6 As shown, the process includes a step of making a resin film master roll (S1), a step of cutting the master roll (S2), a step of collecting and assembling packaging bag scraps (S3), and a step of using the scraps to make a resin film master roll (S4). Figure 6 The steps S1 to S4 shown are examples of steps in the assembly packaging bag manufacturing method of the present invention, which use the scrap material of the assembly packaging bag to make the assembly packaging bag.

[0126] In addition, such as Figure 9 As shown, scrap material 4 is an example of residual material from a combined packaging bag in the method for manufacturing combined packaging bags of the present invention. Additionally, scrap material 4 is also an example of resin film scrap material used for combined packaging bags and / or resin film scrap material used for individual packaging bags in the method for manufacturing combined packaging bags of the present invention.

[0127] In the process of making the resin film master roll (S1), such as Figure 12 As shown, a long strip of resin film master roll 5 is wound into a roll shape. The long strip of resin film master roll 5 is folded into a folded edge shape. Handles 6 are provided on the master roll 5 at predetermined intervals.

[0128] In the process of cutting the master roll (S2), the wound master roll 5 is pulled out and cut at predetermined intervals.

[0129] The process of collecting and assembling packaging bag scraps (S3) and the process of using the scraps to make resin film master rolls (S4) are the same as those for the packaging bags described above.

[0130] In the method for manufacturing a bulk packaging bag according to the present invention, the aforementioned bulk packaging bag can be obtained by performing a step of making a bulk packaging bag using bulk packaging bag residue. In other words, in the method for manufacturing a bulk packaging bag according to the present invention, the resin film constituting the bulk packaging bag for packaging multiple packs of toilet paper contains components derived from bulk packaging bag residue. Therefore, by using this resin film to package multiple packs of toilet paper, a bulk packaging bag with low environmental impact and excellent openability can be obtained.

[0131] Furthermore, in the method for manufacturing the collective packaging bag of the present invention, since the remnant material of the collective packaging bag is scrap of resin film used for the collective packaging bag and / or scrap of resin film used for the individual packaging bag, by packaging multiple sheets of toilet paper with resin film using such scrap, it is possible to obtain a collective packaging bag whose color is close to that of a collective packaging bag made of non-recycled or virgin materials.

[0132] Alternatively, the method for manufacturing the communal packaging bag of the present invention, as shown below, can also be implemented without using the resin film master roll that constitutes the communal packaging bag. Figure 13 It is a flowchart of a method for manufacturing sanitary paper packaging, which includes a method for manufacturing a collection of packaging bags. Figure 14 This is a flowchart illustrating a portion of the manufacturing process (resin film production) of a sanitary paper packaging body, which includes a method for manufacturing a bulk packaging bag.

[0133] like Figure 13 As shown, the method for manufacturing a sanitary paper packaging body, including a method for manufacturing a bulk packaging bag, includes a step of manufacturing sanitary paper (S10), a step of packaging the manufactured sanitary paper with a packaging material containing a resin film (S20), a step of collecting bulk packaging bag residue (S30), and a step of using the residue to manufacture a packaging material containing a resin film (S40). Furthermore, the step of using the residue to manufacture a packaging material containing a resin film (S40) is an example of the step in the method for manufacturing a bulk packaging bag of the present invention that utilizes bulk packaging bag residue to manufacture a bulk packaging bag.

[0134] In the process of making toilet paper (S10), the required toilet paper can be made using known manufacturing methods.

[0135] The process of packaging toilet paper (S20), such as Figure 14 As shown, for example, it may include a process (S21) of forming a cylindrical packaging bag precursor from a packaging material containing a resin film, a process (S22) of storing toilet paper in the packaging bag precursor, and a process (S23) of cutting and joining the packaging bag precursor in a position where there is no toilet paper.

[0136] More specifically, in the process of packaging sanitary paper (S20), a long strip of resin film (packaging material) is prepared to subsequently become a packaging bag 20, and a resin film precursor composed of the resin film is formed. Figure 14 (S21). The resin film precursor is obtained by joining the ends of long strip resin films together in the width direction to form a cylindrical shape while conveying them along a predetermined conveying direction.

[0137] Alternatively, the resin film precursor may not be a flat sheet resin film, but may be a product in which the resin film is formed into a long cylindrical shape. The long cylindrical resin film precursor may be conveyed by a conveyor (not shown) with the portion corresponding to the side fold (or edge fold) of the packaging bag folded inward in advance, and may be pre-wound onto a roll in this state to be provided to the production line, thereby being released from the roll to the conveyor.

[0138] Next, toilet paper is placed inside the front of the packaging bag. Figure 14(S22). When storing, multiple rolls of toilet paper can be stored (or filled) from one side of the opening at the front of the packaging bag. At this time, air can also be introduced into the flattened front of the packaging bag to open an opening large enough for the toilet paper to pass through.

[0139] After at least the toilet paper has been stored, in the area where there is no toilet paper, cut the front of the packaging bag in a vertical direction perpendicular to the predetermined conveying direction, and join it to obtain a sealed packaging bag. Figure 14 (S23). During cutting, scraps of packaging material (also called trimmed edges) are cut off. In this specification, scraps of packaging material are an example of packaging material residue.

[0140] The bonding of resin films can be achieved using methods such as heat sealing, ultrasonic sealing, and adhesives. Among these methods, heat sealing is preferred from the viewpoint that it is relatively simple to operate and can form a stronger bond.

[0141] Joining and cutting of the packaging bag front ( Figure 14 (S23) This can be achieved through a joining and / or cutting portion (not shown) disposed above and below the front body of the packaging bag, capable of being pressurized and / or heated in the vertical direction (thickness direction). The joining and / or cutting portion can be, for example, a component disposed above and below the front body of the packaging bag, capable of being pressurized and / or heated in the vertical direction (thickness direction). The joining and / or cutting portion can be a component where the joining and cutting portions are integrated, or it can be a component comprising joining and cutting portions capable of moving independently of each other. Therefore, the joining and cutting of the packaging bag 20 can be performed simultaneously or at different times.

[0142] Before storing toilet paper, the packaging bag precursor is cut and joined upstream of the toilet paper to be stored, thus forming a packaging bag precursor with one end joined and the other end open. Alternatively, after storing the toilet paper, it is cut and joined downstream of the stored toilet paper. However, the timing of the joining and cutting is not limited to this method. For example, when using pillow-type packaging as described above, the packaging bag precursor can be cut and joined sequentially downstream and upstream after storing the toilet paper.

[0143] As described above, through the above processes S21 to S23, multiple sheets of toilet paper can be packaged in packaging material containing resin film and are in a sealed state.

[0144] In this invention, the waste material (S30) generated during the process of packaging toilet paper with packaging material described above is further collected and utilized. Furthermore, in this specification, the concept of waste material may include scraps generated during the cutting and joining process (S23) described above, as well as resin film portions not included in the packaging bag as the final product, the packaging bag precursor portion, and the packaging bag itself, including defective products containing portions that could not become products due to printing errors, for example.

[0145] To recycle resin film, one could consider recycling toilet paper packaging bags already provided to users and attempting to produce resin film. However, the outer surface of the packaging bags is usually fully printed to prevent the stored toilet paper from being seen from the outside, or to prevent ultraviolet light or other light from affecting the toilet paper. Therefore, when recycling packaging bags and regenerating resin film, the color of the recycled resin film will largely depend on the original packaging bag, which may make it difficult to print the desired color on the recycled resin film.

[0146] In contrast, the waste material has less printing applied or has large areas of unprinted portions compared to the packaging bag of the final product (sanitary paper packaging). Therefore, according to this embodiment, when a new resin film is made using the waste material, that is, when a resin film containing components derived from the waste material is made, a resin film with a color (white, off-white, transparent, etc.) similar to that of a resin film made from unrecycled material (virgin material) can be obtained.

[0147] Therefore, according to this embodiment, various colors can be printed on the recycled resin film as needed. This increases the freedom in the construction and design of packaging bags using recycled resin film, promotes the reuse of resin film packaging bags, and further advances initiatives towards a sustainable society in this field.

[0148] Furthermore, according to the manufacturing method of this embodiment, the recycled resin film utilizes materials collected during the manufacturing of toilet paper packaging. Therefore, compared to the case where the packaging bags are recycled and provided to consumers and then reused after the toilet paper is removed, a resin film with less foreign matter can be obtained. Alternatively, purification processes such as foreign matter removal can be eliminated or reduced during the manufacturing of the resin film.

[0149] In addition, the collection of packaging bag scraps (S30) includes the process of separating and collecting the scraps from the product, which can be carried out by specialized equipment or manually. Furthermore, the packaging bag scraps collected in step S30 can be scraps generated in any process of packaging toilet paper with packaging materials (S20), but preferably scraps generated in the process of cutting and joining the packaging bag precursor at a location where there is no toilet paper (S23).

[0150] As described above, the packaging bag scraps include scraps and other scraps generated during the packaging bag pre-body cutting and joining process (S23), but the packaging bag scraps preferably contain at least a large amount of resin film scraps, and more preferably resin film scraps.

[0151] Furthermore, the toilet paper packaging bag 20 is typically printed entirely. Such printing can, for example, be pre-applied to a resin film that will later serve as the packaging material for forming the bag 20. The printing may also include product information (not shown) regarding the detailed information of the toilet paper as its contents.

[0152] Regarding the printing portion of the packaging bag precursor, the portion that will later become the packaging bag 20 (the portion that will constitute the packaging bag 20) is a printed area (not shown) that has been entirely printed (having an integral printing section). However, the portions between the various parts that will later become the packaging bag 20 are areas between printed areas that have not been printed or have not been entirely printed (no printing section or no integral printing section). That is, the packaging bag precursor alternately has printed areas and areas between printed areas in the elongated direction (conveyance direction).

[0153] In the cutting and joining process (S23), the packaging bag precursor can be cut at a location within the area between the printing areas, specifically at a predetermined cutting position. The area between the predetermined cutting positions is the predetermined scrap area that will become scrap material after the cutting and joining process (S23). As described above, the area between the printing areas is an area with significantly less printing or no printing compared to the printing areas that will later form the packaging bag 20. Therefore, the predetermined scrap area and the scrap material finally obtained are also areas with significantly less printing or no printing compared to the printing areas.

[0154] In the process (S40) of making resin film using residual material, the aforementioned method can be applied. Figure 10 The packaging bag manufacturing method shown includes a step (resin film production) to produce the resin film.

[0155] Furthermore, although it includes the process of packaging sanitary paper made with packaging materials containing resin film (S20), the process of collecting waste materials (S30), and the process of using waste materials to make packaging materials containing resin film (S40), this series of processes is as follows: Figure 13 As shown, this process is repeatable. In this series of repeatable steps, resin films made from waste materials (recycled resin films) can be used starting from the second round. This establishes a circular pathway for the recycling of resin materials. Consequently, initiatives to promote material recycling in this field can be advanced, contributing to the achievement of sustainable development goals.

[0156] In the method for manufacturing a bulk packaging bag according to the present invention, as described above, by having a step of making a bulk packaging bag using bulk packaging bag residue, the resin film constituting the packaging bag for packaging toilet paper contains components derived from the bulk packaging bag residue. Therefore, by using such a resin film to package multiple sheets of toilet paper, a bulk packaging bag with low environmental impact and excellent openability can be obtained.

[0157] Furthermore, in the method for manufacturing a bulk packaging bag according to the present invention, by having a step of making a bulk packaging bag using bulk packaging bag scraps, multiple sheets of toilet paper are packaged using the bulk packaging bag using such scraps, thereby obtaining a bulk packaging bag whose color is similar to that of a packaging bag made from non-recycled or virgin materials.

[0158] Example The present invention will be further described in detail below through examples. The evaluation of the examples and comparative examples was conducted through the following tests. Furthermore, unless otherwise stated, "%" refers to mass.

[0159] [Toilet paper packaging and bags] like Figure 1 , Figure 2 As shown, a toilet paper packaging body is prepared, which is a toilet paper laminate (manufactured by Daio Paper Corporation, i:na soft packaging facial tissue 150 sets) consisting of multiple sets of two-layer overlapping facial tissues stacked in a pull-out manner, and housed in a resin film packaging bag with a dispensing opening formed on the top surface. The resin film constituting the packaging bag is made of polyethylene. In an embodiment, the resin film constituting the packaging bag is mixed with resin film scraps used as waste material for making polyethylene film packaging bags.

[0160] [Packaging bag thickness] The thickness of the packaging bag was measured. The thickness of the packaging bag was measured using a thickness gauge (manufactured by Ozaki Seisakusho, PEACOCK dial thickness gauge G-1A). The thickness was measured 6 times at each of the 3 locations of the packaging bag, and the average value was calculated as the paper thickness.

[0161] [Tensile strength of packaging bags] The tensile strength of the packaging bag was determined according to JIS P 7127 (1999). The unit of tensile strength is N / cm. Measurements were taken five times in both the MD and CD directions, and the average value was taken as the tensile strength in each direction.

[0162] [Elongation at break of packaging bag] The tensile elongation of the packaging bag was determined according to JIS P 7127 (1999). The unit of tensile elongation is %. Five measurements were taken in both the MD and CD directions, and the average value of the measurements was taken as the tensile elongation in each direction.

[0163] [Load capacity at 2% elongation of packaging bag] The 2% elongation load of the packaging bag was determined according to JIS P 7127 (1999). The unit of 2% elongation load is N / 20cm. Five measurements were taken in both the MD and CD directions, and the average value of the measurements was taken as the 2% elongation load in each direction.

[0164] [Tensile modulus of elasticity of packaging bags] The tensile modulus of elasticity of the packaging bag was determined according to JIS P 7127 (1999). The unit of tensile modulus of elasticity is MPa. Five measurements were taken in both the MD and CD directions, and the average value of the measured values ​​was taken as the tensile modulus of elasticity in each direction.

[0165] [Tear strength of packaging bag] The tear strength of the packaging bag was determined according to JIS P 7128-2 (1998). The unit of tear strength is mN. Five measurements were taken in both the MD and CD directions, and the average value was taken as the tear strength in each direction.

[0166] [HAZE on the packaging bag] The haze of the packaging bag was measured according to JIS K 7136 (2000). HAZE is an indicator of the degree of turbidity (or light diffusion) of a substance, expressed as a percentage. Five measurements were taken, and the average value was taken as the HAZE. A HAZE below 12% was considered good, and a HAZE above 12% was considered poor.

[0167] [Glossiness of the packaging bag] The gloss of the packaging bag was measured according to JIS P 8142 (2005). Gloss is a gloss index that measures the ratio of the intensity of incident light to the intensity of reflected light when light shines on an object, and is expressed as a percentage (%). Five measurements were taken, and the average value was taken as the gloss. A gloss of 100% or higher was rated as good, and a gloss of less than 100% was rated as poor.

[0168] [Opening property] The openability of the packaging bags was verified. To verify openability, the left end of the seal was opened 10mm, and a clip (manufactured by Kokuyo, double clip, 25mm) was attached to this position. After installing the attachment on a push-pull force gauge (manufactured by IMADA, Z2-20N), the clip was hung on the attachment, and the opening strength was measured when the bag was pulled upwards at a 45° angle at a speed of 150mm / s. The unit of opening strength is N. Five measurements were performed, and the average value of the opening strength measurements was taken as the openability. An opening strength of 1.5N or more but less than 1.9N was rated as excellent; 1.3N or more but less than 1.5N or 1.9N or more but less than 2.1N was rated as good; all other conditions were rated as poor.

[0169] [Extractability] Within the toilet paper packaging, the number of drops observed when the toilet paper is pulled from the first to the last pack is assessed. Evaluations are based on the following criteria: 0-5 drops are considered good, 6-10 drops are considered poor.

[0170] [Pull-out] Attach the accessory to the push-pull force gauge (IMADA, Z2-20N), and attach a clip (Kokuyo, 25mm double clip). Clamp the clip 10mm from the center of the facial tissue (used as toilet paper). Pull out the first group of facial tissues, and measure the pull strength from the second to the fifth group using five samples. The unit of pull strength is N. Pull the facial tissues perpendicular to the top surface of the packaging bag at a speed of 230mm / second. The pull strength is the maximum value before the facial tissue leaves the packaging bag. Regarding pullability, a pull strength of less than 1.5N is rated as excellent, 1.5N to less than 2.0N is rated as good, and more than 2.0N is rated as poor.

[0171] [Packaging appearance] Sensory evaluation was conducted by 10 subjects, who evaluated the appearance of the packaging bag by whether they would be bothered by foreign objects compared to a conventional product (Comparative Example 1). In terms of appearance, if 0 subjects were concerned, it was rated as excellent; if 1-5 subjects were concerned, it was rated as good; and if 6 or more subjects were concerned, it was rated as poor.

[0172] [Environmental responsiveness of packaging bags] The environmental responsiveness of the packaging bags was evaluated. The evaluation criteria were: excellent if the content of packaging bag residue in the resin film constituting the packaging bag exceeded 10%; good if it exceeded 0% but was below 10%; and poor if it was 0%.

[0173] The following describes the embodiments and comparative examples.

[0174] [Example 1] The proportion of resin film scraps used in the packaging bags (excluding printed components) was 5%, with a thickness of 40 μm. The tensile strength was 18.5 N / cm in the MD direction and 19.0 N / cm in the TD direction; the elongation was 640% in the MD direction and 780% in the TD direction; the load at 2% elongation was 3.69 N / 20 cm in the MD direction and 4.42 N / 20 cm in the TD direction; the tensile modulus was 279 MPa in the MD direction and 349 MPa in the TD direction; and the tear strength was 1352 mN in the MD direction and 11072 mN in the TD direction. These materials were used to manufacture and evaluate sanitary paper packaging. The results are shown in Table 1.

[0175] [Example 2] The proportion of resin film scraps used in the packaging bags, excluding printed components, was 20%. The tensile strength was 19.4 N / cm in both the MD and TD directions; the elongation at MD was 655% in both directions and 755% in both directions; the load at 2% elongation was 3.70 N / 20cm in the MD direction and 4.42 N / 20cm in both directions; the tensile modulus was 271 MPa in the MD direction and 341 MPa in both directions; and the tear strength was 1440 mN in the MD direction and 11520 mN in both directions. In addition, sanitary paper packaging bodies were prepared and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0176] [Example 3] The proportion of resin film scraps used in the packaging bags, excluding printed components, was 25%. The tensile strength was 19.6 N / cm in the MD direction and 19.7 N / cm in the TD direction; the elongation was 656% in the MD direction and 746% in the TD direction; the load at 2% elongation was 3.75 N / 20cm in the MD direction and 4.48 N / 20cm in the TD direction; the tensile modulus was 273 MPa in the MD direction and 344 MPa in the TD direction; and the tear strength was 1444 mN in the MD direction and 11776 mN in the TD direction. In addition, sanitary paper packaging bodies were prepared and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0177] [Example 4] The proportion of resin film scraps used in the packaging bags was 3%, the proportion of printed components (components other than polyethylene) in the scraps (hereinafter referred to as the scrap printing ratio) was 0.9%, and the proportion of printed components in the entire resin film constituting the packaging bags (hereinafter referred to as the scrap printing ratio / overall film) was 0.03%. The tensile strength was 17.2 N / cm in the MD direction and 16.6 N / cm in the TD direction; the elongation was 714% in the MD direction and 728% in the TD direction; the load at 2% elongation was 4.39 N / 20cm in the MD direction and 5.60 N / 20cm in the TD direction; the tensile modulus was 370 MPa in the MD direction and 479 MPa in the TD direction; and the tear strength was 1157 mN in the MD direction and 11000 mN in the TD direction. In addition, sanitary paper packaging bodies were prepared and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0178] [Example 5] The proportion of resin film scraps used in the packaging bags was 5%, the scrap printing ratio / overall film was 0.05%, the tensile strength was 17.4 N / cm in the MD direction and 17.0 N / cm in the TD direction, the elongation was 668% in the MD direction and 714% in the TD direction, the load at 2% elongation was 4.60 N / 20cm in the MD direction and 5.62 N / 20cm in the TD direction, the tensile modulus was 376 MPa in the MD direction and 468 MPa in the TD direction, and the tear strength was 1068 mN in the MD direction and 11200 mN in the TD direction. In addition, sanitary paper packaging bodies were prepared and evaluated in the same manner as in Example 4. The results are shown in Table 1.

[0179] [Example 6] The proportion of resin film scraps used in the packaging bags was 10%, the scrap printing ratio was 0.09% of the total film, the tensile strength was 17.6 N / cm in the MD direction and 17.3 N / cm in the TD direction, the elongation was 621% in the MD direction and 700% in the TD direction, the load at 2% elongation was 4.82 N / 20cm in the MD direction and 5.64 N / 20cm in the TD direction, the tensile modulus was 383 MPa in the MD direction and 457 MPa in the TD direction, and the tear strength was 979 mN in the MD direction and 11800 mN in the TD direction. In addition, sanitary paper packaging bodies were prepared and evaluated in the same manner as in Example 4. The results are shown in Table 1.

[0180] [Example 7] The thickness was 35 μm (the 35 μm thickness is the intended thickness of the packaged bag). The tensile strength was 16.6 N / cm in the MD direction and 16.9 N / cm in the TD direction; the elongation was 605% in the MD direction and 780% in the TD direction; the load at 2% elongation was 3.25 N / 20 cm in the MD direction and 3.82 N / 20 cm in the TD direction; the tensile modulus was 241 MPa in the MD direction and 316 MPa in the TD direction; and the tear strength was 1144 mN in the MD direction and 10688 mN in the TD direction. Otherwise, the sanitary paper packaging body was prepared and evaluated in the same manner as in Example 2. The results are shown in Table 1.

[0181] [Example 8] The proportion of resin film scraps used in the packaging bags was 25%, the scrap printing ratio / overall film was 0.23%, the tensile strength was 18.0 N / cm in the MD direction and 17.8 N / cm in the TD direction, the elongation was 550% in the MD direction and 678% in the TD direction, the load at 2% elongation was 5.13 N / 20cm in the MD direction and 5.68 N / 20cm in the TD direction, the tensile modulus was 392 MPa in the MD direction and 440 MPa in the TD direction, and the tear strength was 845.5 mN in the MD direction and 12000 mN in the TD direction. In addition, sanitary paper packaging bodies were prepared and evaluated in the same manner as in Example 4. The results are shown in Table 1.

[0182] [Comparative Example 1] The resin film constituting the packaging bag does not contain any resin film scraps used in the packaging bag (the proportion of resin film scraps used in the packaging bag is 0%). The tensile strength is 18.5 N / cm in the MD direction and 18.4 N / cm in the TD direction; the elongation at MD is 650% and 790% in the TD direction; the load at 2% elongation is 3.52 N / 20cm in the MD direction and 4.18 N / 20cm in the TD direction; the tensile modulus is 265 MPa in the MD direction and 331 MPa in the TD direction; and the tear strength is 1424 mN in the MD direction and 11072 mN in the TD direction. Otherwise, a sanitary paper packaging body was prepared and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0183] [Comparative Example 2] The resin film constituting the packaging bag does not contain any resin film scraps used in the packaging bag (the proportion of resin film scraps used in the packaging bag is 0%). The tensile strength is 16.9 N / cm in the MD direction and 17.0 N / cm in the TD direction; the tensile elongation is 610% in the MD direction and 765% in the TD direction; the load at 2% elongation is 3.19 N / 20cm in the MD direction and 3.75 N / 20cm in the TD direction; the tensile modulus is 227 MPa in the MD direction and 311 MPa in the TD direction; and the tear strength is 1128 mN in the MD direction and 10240 mN in the TD direction. Otherwise, a sanitary paper packaging body was prepared and evaluated in the same manner as in Example 7. The results are shown in Table 1.

[0184] Table 1 As shown in Table 1, in Examples 1-8, the packaging bags using resin films comprising the packaging bags containing components derived from packaging bag residue, and with a load of 2.5N to 6.5N at 2% elongation in the MD direction, exhibited good environmental adaptability. Furthermore, compared to the toilet paper packaging bags (conventional toilet paper packaging bags) of Comparative Examples 1 and 2, they showed better performance in terms of HAZE, gloss, and openability.

[0185] In addition, in Examples 1 to 7, the sanitary paper packaging made from packaging bags with a printing component content of less than 0.2% by mass in the components derived from the waste material has a better appearance and good pull-out and draw-out properties.

[0186] Furthermore, in Examples 2 and 3, since the content of components derived from residual materials in the resin film constituting the packaging bag reaches 20% by mass or more, the sanitary paper packaging exhibits excellent environmental resilience.

[0187] The above-disclosed implementation methods include, for example, the following aspects.

[0188] The first aspect of this embodiment relates to a packaging bag, which is a resin film packaging bag for packaging sanitary paper, the resin film containing components derived from the packaging bag residue, and the resin film having a load of 2.0 N or more and 6.5 N or less when it has a 2% elongation in the MD direction.

[0189] In this specification, the MD direction of the resin film refers to the flow direction of the resin constituting the resin film. The load at 2% elongation of the resin film is a value determined according to JIS K 7127 (1999), representing the load when the distance between the two marks of the resin film is 2% longer than the original horizontal distance.

[0190] In the first aspect, the resin film constituting the packaging bag for packaging sanitary paper contains components derived from the packaging bag, and therefore the packaging bag made of such resin film has a lower environmental impact.

[0191] Furthermore, in the first aspect, the resin film constituting the packaging bag contains components derived from packaging bag residue, resulting in a load of 2.0 N to 6.5 N at 2% elongation in the MD direction. This resin film is not easily stretched, and a slit knife can easily penetrate when forming the easy-tear line for opening; therefore, packaging bags made from this resin film exhibit excellent openability. Additionally, using this resin film to construct packaging bags reduces the amount of lubricant used.

[0192] The second aspect of this embodiment relates to a packaging bag as described in the first aspect, wherein the scrap material is the edge material of the resin film used for the packaging bag. Resin film packaging bags used for packaging toilet paper are typically printed, but the edge material of the resin film used for the packaging bag is located at the cut position of the resin film used for the packaging bag and its surrounding portion, and therefore is not printed, or at least not printed as a whole as the packaging bag portion.

[0193] In the second aspect, since the waste material of the packaging bag is the scrap of the resin film used for the packaging bag, the printing component in the waste material of the packaging bag is less. Therefore, in the packaging bag made of the resin film containing such waste material, the color of the packaging bag can be close to the color of the packaging bag made of non-recycled or virgin materials.

[0194] Therefore, in the second aspect, even if the resin film constituting the packaging bag contains components derived from packaging bag residues, various colors can be printed on the packaging bag according to the manufacturer's needs. This promotes material reuse even in the field of toilet paper, thereby advancing initiatives towards a sustainable society.

[0195] The third aspect of this embodiment is a packaging bag as described in the first or second aspect, wherein the resin film constituting the packaging bag has a load of 2.5 N to 7.0 N when it is stretched by 2% in the TD direction. In this specification, the TD direction of the resin film refers to the direction perpendicular to the MD direction (the flow direction of the resin constituting the resin film).

[0196] In the third aspect, as mentioned above, the resin film constituting the packaging bag contains components derived from packaging bag residue, and its load at 2% elongation in the TD direction can be between 2.5 N and 7.0 N. This resin film is less prone to stretching, and when forming the easy-tear line for opening, the slit knife can enter more easily, thus packaging bags made of this resin film have superior opening properties.

[0197] The fourth aspect of this embodiment is a packaging bag as described in any one of the first to third aspects, wherein the tear strength of the resin film constituting the packaging bag in the MD direction is 700 mN or more and 2000 mN or less. In this specification, the tear strength of the resin film is a value measured according to JIS K 7128-2 (1998), representing the strength at which the resin film is torn.

[0198] In the fourth aspect, as mentioned above, the resin film constituting the packaging bag contains components derived from packaging bag residue, and its tear strength in the MD direction can be between 700 mN and 2000 mN. This resin film is less prone to stretching, and when forming the easy-tear line for opening, the slit knife can enter more easily, thus packaging bags made of this resin film have superior opening properties.

[0199] The fifth aspect of this embodiment is a packaging bag as described in any one of the first to fourth aspects, wherein the tensile modulus of elasticity of the resin film constituting the packaging bag is 150 MPa or more and 450 MPa or less in the MD direction. In this specification, the tensile modulus of elasticity of the resin film is a value measured according to JIS K 7127 (1999), representing the ratio of tensile stress per unit cross-sectional area of ​​the resin film to strain generated in the stress direction.

[0200] In the fifth aspect, as described above, the resin film constituting the packaging bag contains components derived from packaging bag residue, and its tensile modulus in the MD direction can be between 150 MPa and 450 MPa. This resin film easily maintains its shape, thus allowing for the individual removal of toilet paper sheets from the packaging bag, resulting in excellent toilet paper removal performance.

[0201] The sixth aspect of this embodiment is a packaging bag as described in any one of the first to fifth aspects, wherein the tensile modulus of the resin film constituting the packaging bag is 250 MPa or more and 550 MPa or less in the TD direction.

[0202] In the sixth aspect, the resin film constituting the packaging bag, as described above, contains components derived from packaging bag residue, and its tensile modulus in the TD direction can be between 250 MPa and 500 MPa. This resin film easily maintains its shape, therefore packaging bags made from this resin film have excellent tissue paper dispensing properties.

[0203] The seventh aspect of this embodiment is a packaging bag as described in any one of the first to sixth aspects, wherein the elongation of the resin film constituting the packaging bag in the MD direction is 500% or more and 850% or less. In this specification, the elongation of the resin film is a value measured according to JIS K 7127 (1999), representing the elongation when the resin film is stretched at a specified speed until it breaks.

[0204] In the seventh aspect, the resin film constituting the packaging bag, as described above, contains components derived from packaging bag residue, and its elongation in the MD direction can be between 500% and 850%. This resin film is less prone to stretching, and when forming the easy-tear line for opening, the slit knife can enter more easily, thus packaging bags made of this resin film have superior opening properties.

[0205] The eighth aspect of this embodiment is a packaging bag as described in any one of the first to seventh aspects, wherein the tensile strength of the resin film constituting the packaging bag in the MD direction is 10 N / cm or more and 30 N / cm or less. In this specification, the tensile strength of the resin film is a value measured according to JIS K 7127 (1999), representing the force required to stretch the resin film until it breaks.

[0206] In the eighth aspect, the resin film constituting the packaging bag, as described above, contains components derived from packaging bag residue, and its tensile strength in the MD direction can be between 10 N / cm and 30 N / cm. This resin film is easier to maintain its shape, therefore packaging bags made from this resin film can improve the ease of dispensing toilet paper.

[0207] The ninth aspect of this embodiment is a packaging bag as described in any one of the first to eighth aspects, wherein the content of the component derived from the residual material in the resin film constituting the packaging bag is 2% by mass or more. In the ninth aspect, since the resin film constituting the packaging bag contains 2% by mass or more of the component derived from the packaging bag residual material, it is reliably ensured that the resin film constituting the packaging bag is not easily stretched, thus enabling the production of packaging bags with excellent openability with high precision.

[0208] The tenth aspect of this embodiment is a packaging bag as described in any one of the first to ninth aspects, wherein the content of the printing component in the components derived from the residue is 0.2% by mass or less. In this specification, the printing component refers to the component contained in the packaging bag residue that was previously used for resin film printing.

[0209] In the tenth aspect, since the content of printing components in the components derived from packaging bag scraps is less than 0.2% by mass, even if the components derived from packaging bag scraps include printing components, the color of the packaging bag can be made close to the color of packaging bags made from non-recycled or virgin materials. Therefore, in the tenth aspect, even if the resin film constituting the packaging bag uses packaging bag scraps, various colors can be printed on the packaging bag according to the manufacturer's needs.

[0210] The eleventh aspect of this embodiment relates to a toilet paper packaging body, which has a packaging bag as described in any one of the first to tenth aspects, and toilet paper stored in the packaging bag. In the eleventh aspect, by constructing a toilet paper packaging body that stores toilet paper in the aforementioned packaging bag, the same effects as the aforementioned packaging bag can be obtained.

[0211] In other words, in the eleventh aspect, since the resin film constituting the packaging bag of the toilet paper contains components derived from the packaging bag residue, the toilet paper package obtained by packaging the toilet paper with this resin film has a low environmental impact, excellent opening properties, and excellent toilet paper extraction properties.

[0212] Furthermore, in the eleventh aspect, since the waste material of the packaging bag is scrap from the resin film used for the packaging bag, in the sanitary paper packaging obtained by using the resin film that utilizes such waste material of the packaging bag to package sanitary paper, the color of the packaging bag can be close to the color of the packaging bag made of non-recycled or virgin materials.

[0213] The twelfth aspect of the present invention is a method for manufacturing a packaging bag as described in any one of the first to tenth aspects, the method comprising a step of using the residue of the packaging bag to make a master roll of the resin film.

[0214] In the twelfth aspect, the aforementioned packaging bag can be obtained by performing a process of making a master roll of resin film using leftover packaging bag material. In other words, in the twelfth aspect, since leftover packaging bag material is used in the resin film constituting the packaging bag for toilet paper, packaging toilet paper with this resin film can result in a packaging bag with low environmental impact, excellent opening properties, and excellent toilet paper dispensing properties.

[0215] Furthermore, in the twelfth aspect, since the residue of the packaging bag is the scrap of the resin film used for the packaging bag, when packaging sanitary paper with the resin film using such scrap, it is possible to obtain a packaging bag whose color is close to that of a packaging bag made from non-recycled or virgin materials.

[0216] The thirteenth aspect of this invention is a composite packaging bag, which is a resin film composite packaging bag for packaging multiple sheets of toilet paper, wherein the resin film contains components derived from the residue of the composite packaging bag, and the load of the resin film at 2% elongation in the MD direction is 2.0 N or more and 6.5 N or less.

[0217] In the thirteenth aspect, the resin film constituting the bulk packaging bag contains components derived from bulk packaging bag residues, thus the bulk packaging bag made of such resin film has a lower environmental impact.

[0218] Furthermore, in the thirteenth aspect, the resin film constituting the bulk packaging bag contains components derived from the scrap material of the bulk packaging bag, resulting in a load of 2.0 N to 6.5 N at 2% elongation in the MD direction. This resin film is not easily stretched, and a slit knife can easily penetrate when forming the easy-tear line for opening; therefore, bulk packaging bags made from this resin film have excellent opening properties. In addition, by using this resin film to construct bulk packaging bags, the amount of lubricant used can be reduced.

[0219] The fourteenth aspect of this invention relates to a bulk packaging bag as described in the thirteenth aspect, wherein the scrap material is a scrap of resin film used for the bulk packaging bag and / or a scrap of resin film used for packaging the toilet paper into individual packaging bags. Bulk packaging bags made of resin film for packaging multiple packs of toilet paper and individual packaging bags made of resin film for packaging toilet paper are typically printed, but the resin film scraps for the bulk packaging bags and individual packaging bags, located at the cut position of the resin film used for the bulk packaging bags and individual packaging bags and their surrounding portions, are therefore not printed, or at least not printed as integrally as if the printing were applied to the portion becoming the bulk packaging bag or individual packaging bag.

[0220] In the fourteenth aspect, since the scrap material of the communal packaging bag is such resin film scrap used for communal packaging bags and / or resin film scrap used for individual packaging bags, the communal packaging bag made of resin film using such scrap can make the color of the communal packaging bag close to the color of the communal packaging bag made of non-recycled or virgin materials.

[0221] The fifteenth aspect of the present invention is a method for manufacturing a bulk packaging bag as described in the thirteenth or fourteenth aspect, the method comprising a step of using scrap material from the bulk packaging bag to make the bulk packaging bag.

[0222] In the fifteenth aspect, the aforementioned collective packaging bag can be obtained by implementing a process of making a collective packaging bag using the residue from a collective packaging bag. In other words, in the sixteenth aspect, since the resin film constituting the collective packaging bag for packaging multiple sheets of toilet paper contains components derived from the residue from the collective packaging bag, by packaging multiple sheets of toilet paper with this resin film, a collective packaging bag with low environmental impact and excellent openability can be obtained.

[0223] Furthermore, in the fifteenth aspect, since the scrap material of the bulk packaging bag is resin film scraps used for bulk packaging bags and / or resin film scraps used for individual packaging bags, by using resin film that utilizes such scraps to package multiple sheets of toilet paper, it is possible to obtain bulk packaging bags with a color close to that of bulk packaging bags made from non-recycled or virgin materials.

[0224] The embodiments of the present invention have been described above, but the present invention is not limited to specific embodiments. Various modifications and alterations can be made within the scope of the invention as described in the claims.

[0225] This application claims priority based on Japanese Patent Application No. 2024-057195, filed on March 29, 2024, the entire contents of which are incorporated herein by reference.

[0226] Explanation of reference numerals in the attached figures 1. Master roll 2. Printing area P 3. Cutting line T 4. Trimmed area 5. Master roll 6. Handle 100. Toilet paper packaging body 10. Toilet paper laminate 10A. Toilet paper (facial tissue) 11. Top surface 12. Bottom surface 13, 14. Long side surface 15, 16. Short side surface LD. Lamination direction 20. Packaging bag 21. Top surface 22. Bottom surface 23. Front surface 24. Back surface 25. Side surface 26. Side surface 30. Take-out port 31. Central section 32, 33. End M OP. Tear line Opening 200. Packaging bag material 210. Printed section 220. Remaining section (trimmed edge) 300. Collective packaging bag material 310. Required section 320. Remaining section (trimmed edge)

Claims

1. A packaging bag, which is a packaging bag made of resin film for packaging sanitary paper, The resin film contains components from the residue of the packaging bag, and The load when the resin film has a 2% elongation in the MD direction is 2.0N or more and 6.5N or less.

2. The packaging bag according to claim 1, wherein the scrap material is the offcut of the resin film used for the packaging bag.

3. The packaging bag according to claim 1, wherein the load when the resin film constituting the packaging bag has a 2% elongation in the TD direction is 2.5N or more and 7.0N or less.

4. The packaging bag according to claim 1, wherein the tear strength in the MD direction of the resin film constituting the packaging bag is 700mN or more and 2000mN or less.

5. The packaging bag according to claim 1, wherein the tensile modulus of elasticity in the MD direction of the resin film constituting the packaging bag is 150 MPa or more and 450 MPa or less.

6. The packaging bag according to claim 1, wherein the tensile modulus of the resin film constituting the packaging bag in the TD direction is 250 MPa or more and 550 MPa or less.

7. The packaging bag according to claim 1, wherein the elongation in the MD direction of the resin film constituting the packaging bag is 500% or more and 850% or less.

8. The packaging bag according to claim 1, wherein the tensile strength in the MD direction of the resin film constituting the packaging bag is 10 N / cm or more and 30 N / cm or less.

9. The packaging bag according to claim 1, wherein the content of the component from the residue in the resin film constituting the packaging bag is 2% by mass or more.

10. The packaging bag according to claim 1, wherein the content of the printing component in the composition of the residue is less than 0.2% by mass.

11. A sanitary paper packaging body comprising a packaging bag as described in any one of claims 1 to 10, and Sanitary paper stored in the aforementioned packaging bag.

12. A method for manufacturing a packaging bag, comprising the following steps: The master roll of the resin film is made using the residue from the packaging bag.

13. A type of packaged bag, which is a packaged bag made of resin film for packaging multiple packs of toilet paper. The resin film contains components from the residue of the aggregated packaging bag. The load when the resin film has a 2% elongation in the MD direction is 2.0N or more and 6.5N or less.

14. The aggregate packaging bag according to claim 13, wherein the scrap material is scrap of resin film used for the aggregate packaging bag and / or scrap of resin film used for individual packaging bags made of resin film used for packaging the sanitary paper.

15. A method for manufacturing a bulk packaging bag, as described in claim 13 or 14, comprising the following steps: The assembly packaging bag is made using the scrap material from the assembly packaging bag.

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