Packaging bag, sanitary paper package, method for manufacturing packaging bag, collective packaging bag, and method for manufacturing collective packaging bag

Abstract

To provide a packaging bag having a low environmental load and an easy-to-open property.SOLUTION: The packaging bag is a resin film packaging bag for packaging sanitary paper. The resin film contains a component derived from residual material of the packaging bag, and the 2% elongation load in the MD direction of the resin film is 2.0 N or more and 6.5 N or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a packaging bag, a sanitary paper package, a manufacturing method of a packaging bag, a collective packaging bag, and a manufacturing method of a collective packaging bag. [Background technology]

[0002] Patent Document 1 discloses a bag-packed household tissue paper in which household tissue paper is stored in a bag body formed from a flexible film, perforations are formed on the surface of the bag body, and the household tissue paper is pulled out from a slit that is opened by tearing open the side perforations. Patent Document 2 also discloses a film package with perforations for opening, in which perforations for opening are formed in a flexible film base material in which a sanitary paper laminate of sanitary paper is wrapped. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 2008-183034 [Patent Document 2] Japanese Patent Application Publication No. 2018-177364 Summary of the Invention [Problem to be solved by the invention]

[0004] However, packaging bags in which sanitary paper such as tissue paper and paper towels is packaged can be difficult to open to prevent the opening from being torn during transportation or sales. While promoting the use of recycled resources such as biomass and recycled raw materials is required from the perspective of a recycling-oriented society and reducing environmental impact, using recycled resources does not provide the same transparency and physical properties as regular products.

[0005] An object of the present invention is to provide a packaging bag that has a low environmental impact and is easy to open. [Means for solving the problem]

[0006] A first aspect of the present invention is a packaging bag made of a resin film for packaging sanitary paper, wherein the resin film contains components derived from leftover materials from the packaging bag, and the load at 2% elongation in the MD direction of the resin film is 2.0 N or more and 6.5 N or less.

[0007] In this specification, the MD direction of a resin film refers to the flow direction of the resin constituting the resin film. The load at 2% elongation of a resin film is a value measured in accordance with JIS K 7127 (1999), and indicates the load when the distance between two benchmark lines of the resin film is elongated by 2% from the original level.

[0008] In the first aspect, the resin film that constitutes the packaging bag for packaging sanitary paper contains components derived from the packaging bag, so that the packaging bag made of such a resin film has a low environmental impact.

[0009] In the first aspect, the resin film constituting the packaging bag contains a component derived from the leftover material of the packaging bag, so that the load at 2% elongation in the MD direction is 2.0 N or more and 6.5 N or less. Such a resin film is difficult to stretch and is easy for a perforation blade to penetrate when forming perforations for opening, so packaging bags made from such a resin film have excellent openability. Furthermore, by forming a packaging bag from such a resin film, the amount of lubricant used can be reduced.

[0010] A second aspect of the present invention is the packaging bag according to the first aspect, in which the remnant material is a scrap of resin film used for the packaging bag. Resin film packaging bags for packaging sanitary paper are usually printed, but the scrap of resin film used for the packaging bag is the cut position of the resin film used for the packaging bag and its surrounding area, so it is not printed, or at least not printed all over like the part that will become the packaging bag.

[0011] In the second aspect, the remaining material of the packaging bag is a scrap of resin film used in such packaging bags, and therefore the remaining material of the packaging bag contains a small amount of printed components. Therefore, in a packaging bag made of resin film containing such remaining material, the color of the packaging bag can be made closer to the color of a packaging bag made from unrecycled or virgin material.

[0012] Therefore, in the second aspect, even if the resin film constituting the packaging bag contains components derived from packaging bag waste, the packaging bag can be printed in various colors according to the manufacturer's wishes. This promotes the reuse of materials in the field of sanitary paper and promotes efforts to realize a sustainable society.

[0013] A third aspect of the present invention is the packaging bag according to the first or second aspect, wherein the load at 2% elongation in the TD direction of the resin film constituting the packaging bag is 2.5 N or more and 7.0 N or less. In this specification, the TD direction of the resin film refers to the direction perpendicular to the MD direction (the direction of flow of the resin constituting the resin film).

[0014] In the third aspect, as described above, the resin film constituting the packaging bag contains a component derived from the remaining material of the packaging bag, and thus the load at 2% elongation in the TD direction can be 2.5 N or more and 7.0 N or less. Such a resin film is even less likely to stretch, and the perforation blade can penetrate more easily when forming the perforations for opening, so packaging bags made of such a resin film have even better openability.

[0015] A fourth aspect of the present invention is the packaging bag according to any one of the first to third aspects, wherein the tear strength in the MD direction of the resin film constituting the packaging bag is 700 mN or more and 2000 mN or less. In this specification, the tear strength of the resin film is a numerical value measured in accordance with JIS K 7128-2 (1998) and indicates the strength when the resin film is torn.

[0016] In the fourth aspect, as described above, the resin film constituting the packaging bag contains a component derived from the remaining material of the packaging bag, and thus the tear strength in the MD direction can be 700 mN or more and 2000 mN or less. Such a resin film is even less likely to stretch, and the perforation blade can penetrate more easily when forming the perforations for opening, so that packaging bags made of such a resin film have even better openability.

[0017] A fifth aspect of the present invention is the packaging bag according to any one of the first to fourth aspects, wherein the resin film constituting the packaging bag has a tensile modulus in the MD direction of 150 MPa or more and 450 MPa or less. In this specification, the tensile modulus of the resin film is a value measured in accordance with JIS K 7127 (1999), and indicates the ratio of the tensile stress per unit cross-sectional area of ​​the resin film to the strain generated in the stress direction.

[0018] In the fifth aspect, as described above, the resin film constituting the packaging bag contains components derived from the packaging bag waste, which can result in a tensile modulus in the MD of 150 MPa or more and 450 MPa or less. Such a resin film easily maintains its shape, and a packaging bag made of such a resin film allows the sanitary paper contained in the packaging bag to be removed one sheet at a time, resulting in excellent sanitary paper removal properties.

[0019] A sixth aspect of the present invention is the packaging bag according to any one of the first to fifth aspects, wherein the resin film constituting the packaging bag has a tensile modulus in the TD direction of 250 MPa or more and 550 MPa or less.

[0020] In the sixth aspect, the resin film constituting the packaging bag contains components derived from the packaging bag waste, as described above, and thus the tensile modulus in the TD direction can be 250 MPa or more and 500 MPa or less. Such a resin film easily maintains its shape, and therefore packaging bags made of such a resin film have excellent ease of removal of sanitary paper.

[0021] A seventh aspect of the present invention is the packaging bag according to any one of the first to sixth aspects, wherein the resin film constituting the packaging bag has a tensile elongation in the MD direction of 500% or more and 850% or less. In this specification, the tensile elongation of the resin film is a numerical value measured in accordance with JIS K 7127 (1999), and indicates the percentage of elongation until the resin film breaks when pulled at a predetermined speed.

[0022] In the seventh aspect, the resin film constituting the packaging bag contains components derived from the leftover material of the packaging bag, as described above, and thus the tensile elongation in the MD direction can be 500% or more and 850% or less. Such a resin film is even less likely to stretch, and is easier for a perforation blade to penetrate when forming perforations for opening, so packaging bags made of such a resin film have even better openability.

[0023] An eighth aspect of the present invention is the packaging bag according to any one of the first to seventh aspects, wherein the resin film constituting the packaging bag has a tensile strength in the MD direction of 10 N / cm or more and 30 N / cm or less. In this specification, the tensile strength of the resin film is a numerical value measured in accordance with JIS K 7127 (1999), and indicates the force when the resin film is pulled until it breaks.

[0024] In the eighth aspect, the resin film constituting the packaging bag contains components derived from the packaging bag waste, as described above, and thus the tensile strength in the MD direction can be 10 N / cm or more and 30 N / cm or less. Such a resin film is more likely to maintain its shape, and therefore a packaging bag made of such a resin film can improve the ease of removing sanitary paper.

[0025] A ninth aspect of the present invention is the packaging bag according to any one of the first to eighth aspects, wherein the content of components derived from the waste material in the resin film constituting the packaging bag is 2% by mass or more. In the ninth aspect, by containing 2% by mass or more of components derived from the waste material of the packaging bag in the resin film constituting the packaging bag, the resin film constituting the packaging bag is reliably made less likely to stretch, and therefore a packaging bag with excellent openability can be obtained with high precision.

[0026] A tenth aspect of the present invention is the packaging bag according to any one of the first to ninth aspects, wherein the content of the printed component in the components derived from the waste material is 0.2 mass% or less. In this specification, the printed component refers to the component that was used to print the resin film contained in the waste material of the packaging bag.

[0027] In the tenth aspect, by setting the content of the printing component in the components derived from the packaging bag waste material to 0.2% by mass or less, even if the components derived from the packaging bag waste material include the printing component, the color of the packaging bag can be made to approach the color of a packaging bag made from unrecycled or virgin materials. Therefore, in the tenth aspect, even if the resin film constituting the packaging bag is made from a packaging bag waste material, the packaging bag can be printed in various colors as desired by the manufacturer.

[0028] An eleventh aspect of the present invention is a sanitary paper package comprising the packaging bag according to any one of the first to tenth aspects and sanitary paper contained in the packaging bag. In the eleventh aspect, by configuring a sanitary paper package in which sanitary paper is contained in the above-mentioned packaging bag, the same effects as the above-mentioned packaging bag can be obtained.

[0029] That is, in the 11th aspect, the resin film that constitutes the packaging bag in which the sanitary paper is packaged contains components derived from the leftover materials of the packaging bag, and the sanitary paper package obtained by packaging the sanitary paper in such a resin film has a low environmental impact, is easy to open, and allows the sanitary paper to be easily removed.

[0030] In addition, in the 11th aspect, the leftover material from the packaging bag is scrap material from the resin film used in the packaging bag, and in the sanitary paper package obtained by wrapping sanitary paper in resin film made from such leftover material from the packaging bag, the color of the packaging bag can be made closer to the color of a packaging bag made from unrecycled or virgin material.

[0031] A twelfth aspect of the present invention is a method for manufacturing a packaging bag according to any one of the first to tenth aspects, which includes a step of producing a raw sheet of the resin film using leftover material from the packaging bag.

[0032] In a twelfth aspect, the packaging bag described above is obtained by carrying out a step of producing a raw roll of resin film using leftover packaging bag materials. That is, in the twelfth aspect, leftover packaging bag materials are used for the resin film that constitutes the packaging bag for packaging sanitary paper, and by wrapping sanitary paper in such resin film, a packaging bag that has a low environmental impact, is easy to open, and allows the sanitary paper to be easily removed is obtained.

[0033] In addition, in the 12th aspect, the remaining material of the packaging bag is leftover material from the resin film used for the packaging bag, and when sanitary paper is wrapped in resin film made from such leftover material, the color of the packaging bag obtained is close to the color of packaging bags made from unrecycled or virgin materials.

[0034] A thirteenth aspect of the present invention is a collective packaging bag made of a resin film for packaging a plurality of sanitary paper sheets, wherein the resin film contains components derived from leftover materials from the collective packaging bag, and the load at 2% elongation in the MD direction of the resin film is 2.0 N or more and 6.5 N or less.

[0035] In the thirteenth aspect, the resin film that constitutes the collective packaging bag contains components derived from leftover materials from the collective packaging bag, so that the collective packaging bag made of such a resin film has a low environmental impact.

[0036] In a thirteenth aspect, the resin film constituting the collective packaging bag contains a component derived from the leftover material of the collective packaging bag, so that the load at 2% elongation in the MD direction is 2.0 N or more and 6.5 N or less. Such a resin film is difficult to stretch and is easy for a perforation blade to penetrate when forming perforations for opening, so collective packaging bags made from such a resin film have excellent openability. Furthermore, by forming collective packaging bags from such a resin film, the amount of lubricant used can be reduced.

[0037] A fourteenth aspect of the present invention is the collective packaging bag according to the thirteenth aspect, in which the remnants are scraps of resin film used for the collective packaging bag and / or scraps of resin film used for the individual packaging bags made of resin film for packaging the sanitary paper. Collective packaging bags made of resin film for packaging a plurality of sanitary paper sheets and individual packaging bags made of resin film for packaging sanitary paper sheets are usually printed, but the scraps of resin film used for the collective packaging bag and the individual packaging bags are the cutting positions and surrounding areas of the resin film used for the collective packaging bag and the individual packaging bags, and therefore are not printed, or at least not printed overall like the parts that become the collective packaging bag or the individual packaging bags.

[0038] In the fourteenth aspect, the leftover materials of the collective packaging bag are scraps of resin film used in such collective packaging bags and / or scraps of resin film used in individual packaging bags, and therefore collective packaging bags made from resin film using such scraps can have a color that is closer to the color of collective packaging bags made from unrecycled or virgin materials.

[0039] A fifteenth aspect of the present invention is a method for manufacturing a collective packaging bag according to the thirteenth or fourteenth aspect, which includes a step of producing the collective packaging bag using leftover material from the collective packaging bag.

[0040] In a fifteenth aspect, the above-mentioned collective packaging bag is obtained by carrying out a step of producing a collective packaging bag using leftover materials from collective packaging bags. That is, in a sixteenth aspect, the resin film constituting the collective packaging bag that packages a plurality of sanitary paper sheets contains components derived from the leftover materials from collective packaging bags, and by wrapping a plurality of sanitary paper sheets in such a resin film, a collective packaging bag that has a low environmental impact and is easy to open is obtained.

[0041] In addition, in the 15th aspect, the leftover materials of the collective packaging bag are scraps of resin film used for the collective packaging bag and / or scraps of resin film used for the individual packaging bags, and by wrapping multiple sanitary papers in resin film made from such scraps, a collective packaging bag whose color is close to the color of collective packaging bags made from unrecycled or virgin materials is obtained. [Effects of the Invention]

[0042] According to one aspect of the present invention, a packaging bag that has a low environmental impact and is easy to open can be provided. [Brief explanation of the drawings]

[0043] [Figure 1] FIG. 1 is a diagram showing an example of a sanitary paper package using the packaging bag of the embodiment. [Figure 2] FIG. 10 is a diagram showing an example of sanitary paper packed in the packaging bag of the embodiment. [Figure 3] FIG. 2 is a view of FIG. 1 as seen from the top side. [Figure 4] FIG. 2 is a diagram showing the sanitary paper packaging of FIG. 1 in use. [Figure 5] FIG. 10 is a diagram showing an example of a leftover packaging bag. [Figure 6] FIG. 1 is a flow chart illustrating some steps in a method for manufacturing a sanitary paper package. [Figure 7] FIG. 2 is a diagram showing an original sheet of resin film that constitutes a packaging bag. [Figure 8] FIG. 8 is a diagram showing the state in which printing is performed on the base web of FIG. 7. [Figure 9] FIG. 9 is a diagram showing the state in which the printed raw material of FIG. 8 has been cut. [Figure 10] FIG. 2 is a flow diagram for explaining a part of the steps (production of a resin film) in the method for producing a packaging bag. [Figure 11] FIG. 10 is a diagram showing an example of a leftover material of a collective packaging bag. [Figure 12] FIG. 2 is a diagram showing an original sheet of resin film that constitutes a collective packaging bag. [Figure 13]FIG. 1 is a flow diagram of a method for manufacturing a sanitary paper package, including a method for manufacturing a collective packaging bag. [Figure 14] FIG. 1 is a flow diagram for explaining a part of the steps (packaging a plurality of sanitary paper sheets) in a method for manufacturing a sanitary paper package, including a method for manufacturing a collective packaging bag. DETAILED DESCRIPTION OF THE INVENTION

[0044] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Common parts in the drawings will be given the same reference numerals and their explanations may be omitted. Also, the scale of each member in each drawing may differ from the actual scale.

[0045] In this specification, the directions in the drawings are explained using a three-dimensional Cartesian coordinate system with three axes (X, Y, and Z). In each drawing, the left-right direction (the lengthwise direction of the sanitary paper laminate, packaging bag, or sanitary paper package) is the X direction, the front-rear direction (the widthwise direction of the sanitary paper laminate, packaging bag, or sanitary paper package) is the Y direction, and the up-down direction (the heightwise direction of the sanitary paper laminate, packaging bag, or sanitary paper package) is the Z direction.

[0046] In this specification, deviations in each direction are permitted to the extent that they do not impair the functions and effects of the embodiments. Note that perpendicular may include substantially perpendicular.

[0047] <Packaging bags and sanitary paper packaging> Fig. 1 is a diagram showing an example of a sanitary paper package using the packaging bag of the embodiment. Fig. 2 is a diagram showing an example of sanitary paper packaged in the packaging bag of the embodiment. Fig. 3 is a diagram showing Fig. 1 as viewed from the top side, and Fig. 4 is a diagram showing the sanitary paper package of Fig. 1 in use. Fig. 5 is a diagram showing an example of leftover material from the packaging bag.

[0048] In Figure 1, the sanitary paper package 100 has a packaging bag 20 and multiple pieces of sanitary paper 10A (sanitary paper laminate 10). The packaging bag 20 forms part of the sanitary paper package 100. As shown in Figure 2, the packaging bag 20 packages multiple (multiple sheets or multiple sets) stacked pieces of sanitary paper 10A (sanitary paper laminate 10). The sanitary paper laminate 10 is contained in the packaging bag 20 so that the stacking direction LD of the sanitary paper 10A is the height direction (Z direction). The sanitary paper laminate 10 is designed so that the sanitary paper 10A can be pulled out one set at a time through an outlet 30 (opening OP) formed in the packaging bag 20, which will be described later.

[0049] The form of the sanitary paper laminate 10 is not particularly limited, and can be, for example, a laminate of sanitary paper 10A in a folded state, a laminate of sanitary paper 10A in a folded state and stacked alternately (a so-called pop-up sanitary paper laminate), or a laminate of multiple sanitary paper 10A simply stacked.

[0050] The dimensions of the sanitary paper 10A (sanitary paper laminate 10) can be approximately 150 to 250 mm in the longitudinal direction (X direction) of the packaging bag 20, approximately 70 to 150 mm in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the packaging bag 20, and approximately 20 to 100 mm in the height direction (Z direction). Such tissue paper laminates can be manufactured, for example, using a rotary or multi-stand interfolder.

[0051] The sanitary paper 10A is not particularly limited in its form, and can be applied to, for example, sanitary thin papers such as tissue paper, paper towels, kitchen paper, toilet paper, etc. These sanitary thin papers also include sanitary thin papers containing moisturizing ingredients (for example, lotion tissues, etc.).

[0052] The sanitary paper 10A is not particularly limited in its intended use, and can be used for industrial, home, or portable purposes. Of these, tissue paper for home or portable use is preferably used as the sanitary paper in this embodiment.

[0053] The number of plies in the sanitary paper 10A is not particularly limited, but can be one or more, and is preferably one or two (two layers).The shape of the sanitary paper 10A is also not particularly limited, but it is preferable that the outline shape of one ply of sanitary paper when folded is quadrangular (rectangular, square, etc.).

[0054] The material of the sanitary paper 10A is not particularly limited, but for example, base paper made primarily of pulp is used. The pulp composition can be any known sanitary paper composition. For example, the pulp content can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0055] The pulp composition of the sanitary paper 10A is not particularly limited. For example, any ratio of softwood pulp, such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp), to hardwood pulp, such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp), can be used.

[0056] In sanitary paper, the ratio of hardwood pulp to softwood pulp is not limited, but is preferably 90:10 to 20:80, and more preferably a pulp composition in which the ratio of hardwood pulp to softwood pulp is higher. Furthermore, recycled paper pulp may be used as the pulp contained in sanitary paper.

[0057] The basis weight of the sanitary paper 10A is not particularly limited, but in the case of paper, it is 5 g / m depending on the number of plies. 2 More than 80g / m 2 and preferably 10 g / m 2 More than 60g / m 2 Less than 10 g / m, more preferably 2 More than 45g / m 2 In the case of nonwoven fabric, the density is 20 g / m 2 More than 100g / m 2 The following is desirable: Basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0058] The thickness of the sanitary paper is not particularly limited, and can be the paper thickness measured under the environment of JIS P 8111 (1998). For example, if the sanitary paper 10A is paper, the paper thickness per two plies is 50 μm to 600 μm, preferably 60 μm to 500 μm, and more preferably 130 μm to 400 μm.

[0059] The sanitary paper 10A may also be embossed. Such embossing can be performed using a known embossing method. The embossing method is not particularly limited, and examples include the steel rubber method and the steel match method.

[0060] The packaging bag 20 is made of a resin film. The components of the resin film that constitutes the packaging bag 20 are not particularly limited, and examples of resins that can be used include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), etc. Note that the polyethylene that can be used includes high-density polyethylene, low-density polyethylene, etc.

[0061] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferred because they are flexible and easy to handle, have high heat-sealing properties, are inexpensive, etc. Furthermore, polyethylene is preferred because it is odorless, has excellent water and chemical resistance, and can be mass-produced at low cost.

[0062] In addition to the resin, the resin film may contain additives such as stabilizers, fillers, etc. The color of the resin film in the present disclosure (the color in an unprinted state) is white, milky white, or transparent.

[0063] The form of the resin film forming the packaging bag 20 is not particularly limited, and may be a single-layer film formed of a single layer of the above-mentioned resin, a laminate film formed by laminating the above-mentioned resin, a film formed by bonding or laminating the above-mentioned resin with pulp paper or nonwoven fabric, or a mixed film formed from a mixture of two or more of the above-mentioned resins.

[0064] 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 making the resin film thickness 20 μm or more, sufficient strength can be ensured for the packaging bag 20 that contains the sanitary paper laminate 10. Furthermore, by making the resin film thickness 100 μm or less, flexibility of the packaging bag 20 can be ensured and it can be made lighter.

[0065] The shape of the packaging bag 20 is not particularly limited, but is generally a rectangular parallelepiped when the sanitary paper laminate 10 is contained in the packaging bag 20. Such a generally rectangular parallelepiped packaging bag 20 has a top surface 21, a bottom surface 22, a front surface 23, a back surface 24, and side surfaces 25 and 26. As shown in Figures 1, 3, and 4, the top surface 21 and the bottom surface 22 of the packaging bag 20 face each other in the vertical direction (Z direction), the front surface 23 and the back surface 24 face each other in the width direction (Y direction), and the side surfaces 25 and 26 face each other in the longitudinal direction (X direction). In addition, the side surfaces 25 and 26 are continuous with all of the top surface 21, bottom surface 22, front surface 23, and back surface 24.

[0066] 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 to 250 mm, the length of the packaging bag 20 in the short direction (Y direction) perpendicular to the longitudinal direction (X direction) can be approximately 70 to 150 mm, and the height in the height direction (Z direction) can be approximately 20 to 100 mm. Note that the dimensions of the packaging bag 20 are the dimensions when the sanitary paper laminate 10 is contained in the packaging bag 20, as shown in Figures 1 and 2.

[0067] Furthermore, there are no particular limitations on the packaging form of the packaging bag 20. In this embodiment, for example, packaging in which both ends of a tubular resin film are folded and sealed (caramel packaging), packaging in which both ends or either one of the ends of a tubular resin film folded in a gusset shape are sealed (pillow packaging), packaging in which a heat-shrinkable resin film is heated to make it adhere tightly to the packaged object (shrink packaging), or packaging in which a combination of these may be used.

[0068] In this embodiment, a pair of side surfaces (side surfaces 25, 26 in this embodiment) of the packaging bag 20 facing each other in the first direction (X direction) are sealed with caramel packaging.

[0069] The packaging bag 20 contains the sanitary paper laminate 10.

[0070] As shown in Fig. 1, the packaging bag 20 has a top surface 21, a bottom surface 22, a front surface 23, a back surface 24, side surfaces 25, and side surfaces 26 when the sanitary paper laminate 10 is stored inside. In the packaging bag 20, the top surface 21 and the bottom surface 22 face each other in the up-down direction (Z direction), the front surface 23 and the back surface 24 face each other in the front-to-back direction (Y direction), and the side surfaces 25 and 26 face each other in the left-to-right direction (X direction). The side surfaces 25 and 26 are continuous with all of the top surface 21, bottom surface 22, front surface 23, and back surface 24.

[0071] The sanitary paper laminate 10 contained in the packaging bag 20 has a top surface 11, a bottom surface 12, a long side surface 13, a long side surface 14, a short side surface 15, and a short side surface 16 facing the top surface 21, a bottom surface 22, a front surface 23, a back surface 24, a side surface 25, and a side surface 26 of the packaging bag 20, respectively.

[0072] An outlet 30 is provided on the top surface 21 of the packaging bag 20. The outlet 30 is designed to allow the sanitary paper 10A to be pulled out. The outlet 30 is configured as an opening OP. The opening OP that forms the outlet 30 may be configured by tearing perforations M (intermittent cuts), as shown in Figures 1 and 3.

[0073] The shape of the opening OP that constitutes the outlet 30 is not particularly limited, and may be, for example, a straight line, an elongated rectangle, an ellipse, a truck shape, a gourd shape (or a dumbbell shape) or the like in a plan view. Here, the gourd shape (or a dumbbell shape) refers to an ellipse with a narrowed central portion. Among these, a straight line, an ellipse, a truck shape, and a gourd shape (or a dumbbell shape) are preferred, more preferably a truck shape or a gourd shape (or a dumbbell shape), and even more preferably a gourd shape (or a dumbbell shape).

[0074] As shown in Figures 1, 3, and 4, the outlet 30, which is gourd-shaped (or dumbbell-shaped) in plan view, has a shape in which the width of the central portion 31 of the outlet 30 is narrower than the width of the ends 32, 33 of the outlet 30. The shape of the central portion 31 of the outlet 30 is not particularly limited, but may be, for example, an elongated rectangle. The shapes of the ends 32, 33 of the outlet 30 are not particularly limited, but may be, for example, an oval or a sector.

[0075] When the outlet 30 is gourd-shaped (or dumbbell-shaped) in a planar view, 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 or more and 10 mm or less, more preferably 3 mm or more and 8 mm or less, and more preferably 4 mm or more and 6 mm or less.

[0076] The width (maximum width in the Y direction) of both ends 32, 33 of 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 more preferably 15 mm or more and 40 mm or less.

[0077] 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 both ends 32, 33 of the outlet 30 is not particularly limited, but is preferably 5% or more and 40% or less, more preferably 7% or more and 30% or less, and even more preferably 10% or more and 25% or less.

[0078] The total length of the outlet 30 in the longitudinal direction (X direction) is not particularly limited, and is, for example, 40% or more and 100% or less of the total length of the top surface 21 of the packaging bag 20 of the sanitary paper packaging body 100 in the longitudinal direction (X direction), preferably 45% or more and 90% or less, and more preferably 50% or more and 80% or less.

[0079] 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 is preferably 35% or more and 75% or less, more preferably 40% or more and 70% or less, and even more preferably 45% or more and 65% or less.

[0080] The ratio of the length of each of the ends 32, 33 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 is preferably 5% or more and 45% or less, more preferably 10% or more and 30% or less, and even more preferably 15% or more and 25% or less.

[0081] In the sanitary paper package 100 of the present disclosure, the resin film that constitutes the packaging bag 20 contains components derived from packaging bag leftovers. In this specification, packaging bag leftovers (hereinafter sometimes simply referred to as leftovers) refer to unnecessary or excess materials that were generated from the resin film used in the resin film packaging bags that package sanitary paper and that were not used to make the packaging bag.

[0082] Components derived from packaging bag waste materials are 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), polyamide (PA), etc. Furthermore, examples of polyethylene include high-density polyethylene and low-density polyethylene.

[0083] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferred because they are flexible and easy to handle, have high heat-sealing properties, are inexpensive, etc. Furthermore, polyethylene is preferred because it is odorless, has excellent water and chemical resistance, and can be mass-produced at low cost.

[0084] The packaging bags that are the source of the leftovers are packaging bags made of resin film used to package sanitary paper. The leftover packaging bags are preferably scraps of the resin film used for the packaging bags. For example, as shown in FIG. 5, the scraps of the resin film used for the packaging bags are the remaining portion (also called trim) 220 after removing the printed portion 210 required for the packaging bag from packaging bag material 200.

[0085] The content of components derived from leftover materials in the resin film constituting 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. Note that the upper limit of the content of components derived from leftover materials in the resin film constituting 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.

[0086] In addition, the packaging bags made of resin film used to package sanitary paper are usually printed, and the remaining material from the packaging bags used for such packaging bags contains printed components.

[0087] Therefore, in the packaging bag 20 of the present disclosure, the content of the printed component in the components derived from the packaging bag waste 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. Note that the lower limit of the content of the printed component in the components derived from the packaging bag waste is arbitrary, but from the viewpoint of controlling the color of the packaging bag as much as possible, it is preferably 0% by mass.

[0088] The resin film constituting the packaging bag 20 of the present disclosure has a load at 2% elongation in the MD direction of 2.0 N or more and 6.5 N or less, preferably 2.5 N or more and 6.0 N or less, and more preferably 3.0 N or more and 5.5 N or less. The MD direction of the resin film indicates the direction in which the resin constituting the resin film flows.

[0089] Here, the load at 2% elongation of the resin film is a value measured in accordance with JIS K 7127 (1999), and indicates the load when the distance between two benchmark lines of the resin film is elongated by 2% from the original level.

[0090] The load at 2% elongation in the TD direction is 2.5 N or more and 7.0 N or less, preferably 3.0 N or more and 6.5 N or less, and more preferably 3.5 N or more and 6.0 N or less. The TD direction of the resin film refers to the direction perpendicular to the MD direction (the flow direction of the resin that constitutes the resin film).

[0091] The tear strength in the MD direction of the resin film constituting the packaging bag 20 of the present disclosure 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 in accordance with JIS P 8116 (2000) and indicates the strength when the resin film is torn.

[0092] The tear strength in the TD direction is preferably 9,500 mN or more and 13,000 mN or less, more preferably 10,000 mN or more and 12,500 mN or less, and even more preferably 10,500 mN or more and 11,900 mN or less.

[0093] The resin film constituting the packaging bag 20 of the present disclosure preferably has a tensile modulus in the MD direction of 150 MPa to 450 MPa, more preferably 200 MPa to 430 MPa, and even more preferably 230 MPa to 400 MPa. Here, the tensile modulus of the resin film is a value measured in accordance with JIS K 7127 (1999), and indicates the ratio of the tensile stress per unit cross-sectional area of ​​the resin film to the strain generated in the stress direction.

[0094] 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.

[0095] The resin film constituting the packaging bag 20 of the present disclosure preferably has a tensile elongation in the MD direction of 500% to 850%, more preferably 550% to 800%, and even more preferably 600% to 750%. Here, the tensile elongation of the resin film is a value measured in accordance with JIS K 7127 (1999), and indicates the percentage of elongation until the resin film breaks when pulled at a predetermined speed.

[0096] The tensile elongation in the TD direction is preferably 550% or more and 900% or less, more preferably 600% or more and 850% or less, and even more preferably 650% or more and 800% or less.

[0097] The resin film constituting the packaging bag 20 of the present disclosure preferably has a tensile strength in the MD direction of 10 N / cm to 30 N / cm, more preferably 12 N / cm to 25 N / cm, and even more preferably 15 N / cm to 20 N / cm. Here, the tensile strength of the resin film is a value measured in accordance with JIS K 7127 (1999), and indicates the force when the resin film is pulled until it breaks.

[0098] The resin film constituting the packaging bag 20 of the present disclosure preferably has a tensile strength in the TD direction of 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.

[0099] As described above, in the packaging bag 20 of the present disclosure, the resin film that constitutes the packaging bag 20 that packages the sanitary paper 10A contains components derived from leftover materials from the packaging bag, and therefore, the packaging bag 20 made of such a resin film has a low environmental impact.

[0100] Furthermore, the resin film that constitutes packaging bag 20 contains components derived from packaging bag remnants, so that the load at 2% elongation in the MD direction is 2.0 N or more and 6.5 N or less. Such a resin film is difficult to stretch and is easy for a perforation blade to penetrate when forming perforations for opening, so packaging bag 20 made from such a resin film has excellent openability. Furthermore, by forming a packaging bag from such a resin film, the amount of lubricant used can be reduced.

[0101] In the packaging bag 20 of the present disclosure, as described above, the remaining material of the packaging bag is scrap material of the packaging bag 20, and therefore the amount of printed components in the remaining material of the packaging bag is small. Therefore, in a packaging bag made of a resin film containing such scrap material, the color of the packaging bag 20 can be made closer to the color of a packaging bag made from unrecycled or virgin material.

[0102] Therefore, even if the resin film that makes up the packaging bag 20 contains components derived from packaging bag waste, the packaging bag can be printed in various colors according to the manufacturer's wishes. This promotes the reuse of materials in the field of sanitary paper and promotes efforts to realize a sustainable society.

[0103] In the packaging bag 20 of the present disclosure, as described above, the resin film constituting the packaging bag 20 contains components derived from the leftover material of the packaging bag, and therefore the load at 2% elongation in the TD direction can be 2.5 N or more and 7.0 N or less. Such a resin film is even less likely to stretch, and is easier for the perforation blade to penetrate when forming the perforations for opening, so that the packaging bag 20 made of such a resin film has even better openability.

[0104] In the packaging bag 20 of the present disclosure, as described above, the resin film constituting the packaging bag 20 contains components derived from the leftover material of the packaging bag, and this allows the tear strength in the MD direction to be 700 mN or more and 2000 mN or less. Such a resin film is even less likely to stretch, and is easier for the perforation blade to penetrate when forming the perforations for opening, so that the packaging bag 20 made of such a resin film has even better openability.

[0105] As described above, in the packaging bag 20 of the present disclosure, the resin film that makes up the packaging bag 20 contains components derived from the packaging bag's leftover material, which allows the tensile modulus in the MD to be 150 MPa or more and 450 MPa or less. This type of resin film easily maintains its shape, and a packaging bag 20 made from this resin film allows the sanitary paper 10A contained in the packaging bag 20 to be removed one sheet at a time, resulting in excellent ease of removal of the sanitary paper 10A.

[0106] In the packaging bag 20 of the present disclosure, the resin film constituting the packaging bag 20 contains components derived from the packaging bag waste material, as described above, and can have a tensile modulus in the TD direction of 250 MPa or more and 500 MPa or less. Because such a resin film easily maintains its shape, a packaging bag 20 made of such a resin film has excellent ease of removal of the sanitary paper 10A.

[0107] In the packaging bag 20 of the present disclosure, the resin film constituting the packaging bag 20 contains components derived from the leftover material of the packaging bag, as described above, and thus the tensile elongation in the MD direction can be 500% or more and 850% or less. Such a resin film is even less likely to stretch, and is easier for the perforation blade to penetrate when forming the perforations for opening, so that the packaging bag 20 made of such a resin film has even better openability.

[0108] In the packaging bag 20 of the present disclosure, the resin film that constitutes the packaging bag 20 contains components derived from the packaging bag remnants, as described above, and can therefore have a tensile strength in the MD direction of 10 N / cm or more and 30 N / cm or less. Such a resin film is more likely to retain its shape, and therefore a packaging bag 20 made of such a resin film can improve the ease of removal of the sanitary paper 10A.

[0109] In the packaging bag 20 of the present disclosure, the resin film constituting the packaging bag 20 contains 2% by mass or more of components derived from the leftover material of the packaging bag, which ensures that the resin film constituting the packaging bag 20 is less likely to stretch, thereby enabling a packaging bag 20 with excellent openability to be obtained with high precision.

[0110] As described above, in the packaging bag 20 of the present disclosure, the content of the printing component in the components derived from the packaging bag leftovers is 0.2 mass% or less, so that even if the components derived from the packaging bag leftovers include the printing component, the color of the packaging bag 20 can be made to approximate the color of a packaging bag made from unrecycled or virgin materials. Therefore, in the packaging bag 20 of the present disclosure, even if the resin film constituting the packaging bag 20 uses leftover packaging bag materials, the packaging bag can be printed in various colors as desired by the manufacturer.

[0111] Furthermore, the sanitary paper package 100 of the present disclosure is configured by placing sanitary paper 11A in the above-described packaging bag 20, thereby achieving the same effects as the above-described packaging bag 20. That is, in the sanitary paper package 100 of the present disclosure, the resin film that makes up the packaging bag 20 that packages the sanitary paper 11A contains components derived from leftover packaging bag materials, and the sanitary paper package 100 obtained by packaging the sanitary paper 11A in such a resin film has a low environmental impact, is easy to open, and allows the sanitary paper to be easily removed.

[0112] Furthermore, in the sanitary paper packaging 100 of the present disclosure, the remaining material of the packaging bag is scraps of the resin film used in the packaging bag, so the color of the packaging bag can be made closer to the color of a packaging bag made from unrecycled or virgin materials.

[0113] <Manufacturing method of packaging bags> Fig. 6 is a flow chart for explaining some steps in a method for producing a packaging bag. Fig. 7 is a diagram showing an original roll of resin film that constitutes a packaging bag, Fig. 8 is a diagram showing a state in which printing has been applied to the original roll of Fig. 7, and Fig. 9 is a diagram showing a state in which the printed original roll of Fig. 8 has been cut. Fig. 10 is a flow chart for explaining some steps (production of resin film) in a method for producing a packaging bag.

[0114] The method for manufacturing the packaging bag of the present disclosure is a method for manufacturing the above-mentioned packaging bag, and includes a step of producing a raw sheet of the resin film using leftover material from the packaging bag.

[0115] Specifically, as shown in Figure 6, the method for manufacturing a packaging bag of the present disclosure includes a step (S1) of manufacturing a raw sheet of resin film, a step (S2) of cutting the raw sheet, a step (S3) of collecting leftover packaging bag materials, and a step (S4) of manufacturing a raw sheet of resin film using the leftover materials. Note that the step (S4) of manufacturing a raw sheet of resin film using the leftover packaging bag materials is an example of a step of manufacturing a raw sheet of resin film using leftover packaging bag materials in the method for manufacturing a packaging bag of the present disclosure.

[0116] In the step (S1) of preparing a raw sheet of resin film, a raw sheet of resin film 1 in the form of a long roll is prepared. A plurality of packaging bags, which will be described later, can be obtained from the raw sheet of resin film 1 in the form of a long roll. As shown in FIG. 7, the raw sheet of resin film 1 in the form of a long flat sheet is obtained by joining the ends of the resin film in the width direction to form a cylindrical shape.

[0117] The obtained long roll raw material 1 is further printed with printing P in an area (hereinafter referred to as a printing area) 2 that will later become a packaging bag. Note that printing P is not printed on an area (hereinafter referred to as a trim area) T that will later become a trim.

[0118] In the process (S2) of cutting the raw material, the raw material 1 of the long roll of resin film is cut to a predetermined size. The raw material 1 is cut at predetermined intervals along cutting lines C as shown in FIG. 8 while the long roll of raw material 1 is fed in a predetermined transport direction.

[0119] By cutting this raw web 1, a plurality of rolls of resin film 3 that form packaging bags are obtained, as shown in Fig. 9. Furthermore, by cutting both end portions of the raw web 1, scraps 4 are obtained. The scraps 4 are an example of leftover material from packaging bags in the manufacturing method for packaging bags of the present disclosure. The scraps 4 are also an example of scrap material from resin film used for packaging bags in the manufacturing method for packaging bags of the present disclosure.

[0120] The process of producing a raw sheet of resin film using leftover materials (S4 in FIG. 6) may include a known method for producing resin films. A typical resin film production flow will be described with reference to FIG. 10. As shown in FIG. 10, the process of producing a resin film using leftover materials (S4 in FIG. 6) may include producing leftover pellets from collected scrap material 4 (S41 in FIG. 10), melting the resin material containing the produced leftover pellets (S42 in FIG. 10), and forming the resin material into a film (S43 in FIG. 10).

[0121] The production of remnant pellets (FIG. 10, S41) can also be performed using known methods. For example, as shown in FIG. 10, the remnants of packaging bags (such as scraps) can be sorted, any foreign matter removed, and the remnants can be crushed and washed. The material can then be melted, formed into pellets, cooled, and dehydrated to obtain the remnant pellets.

[0122] In the step (S4) of producing a raw sheet of resin film using the remnant material, the obtained remnant material pellets can be used alone, in which case a resin film made from the remnant material is produced. On the other hand, the remnant material pellets can also be used together with, for example, unrecycled resin pellets (virgin resin pellets). In this case, the remnant material pellets and the unrecycled resin pellets or unrecycled resin material can be mixed in any ratio.

[0123] However, the greater the proportion of residual pellets, the greater the proportion of renewable materials, which is more preferable from the perspective of realizing a sustainable society. For example, the proportion of components derived from residual packaging bags in the recycled resin film may be preferably 20% by mass or more, more preferably 30% by mass or more.

[0124] From the viewpoint of improving the strength of the resin film produced, it is preferable to use unrecycled resin material (virgin resin material) in the resin material melting step (S42 in FIG. 10). It is preferable to use materials derived from leftover materials (leftover pellets) in a proportion that keeps the strength of the resulting film to 10% or less (i.e., a proportion that ensures that the strength of the resulting film is 90% or more), assuming that the strength of a resin film produced from unrecycled resin material is 100%. From this viewpoint, for example, the proportion of unrecycled resin material (virgin resin material) in the recycled resin film may be preferably 70% by mass or more, more preferably 80% by mass or more.

[0125] In forming the film (FIG. 10, S43), known methods such as inflation, a method using a T-die, and extrusion molding can be used.

[0126] In the method for manufacturing a packaging bag of the present disclosure, the above-mentioned packaging bag is obtained by carrying out a step of producing a raw roll of resin film using leftover packaging bag materials. That is, in the method for manufacturing a packaging bag of the present disclosure, leftover packaging bag materials are used for the resin film that constitutes the packaging bag that packages sanitary paper, and by wrapping sanitary paper in such resin film, a packaging bag that has a low environmental impact, is easy to open, and allows the sanitary paper to be easily removed is obtained.

[0127] Furthermore, in the manufacturing method of the packaging bag disclosed herein, the remaining material of the packaging bag is scrap material of the resin film used for the packaging bag, and by wrapping sanitary paper in resin film made from such scrap material, a packaging bag whose color is close to the color of a packaging bag made from unrecycled or virgin material can be obtained.

[0128] As described above, the manufacturing method of the packaging bag of the present disclosure includes a step (S1) of preparing a raw roll, a step (S2) of cutting the raw roll, a step (S3) of collecting the remaining material, and a step (S4) of preparing a raw roll using the remaining material, and this series of steps can be repeated as shown in Figure 6.

[0129] In this repeatable series of processes, resin film made from leftover materials (recycled resin film) can be used from the second cycle of the series of processes. This establishes a circular route for recycling resin materials. This will promote efforts to recycle materials in this field and contribute to achieving the Sustainable Development Goals.

[0130] <Collective packaging bag> 11 is a diagram showing an example of leftover material from a collective packaging bag. The collective packaging bag of the present disclosure is used to package multiple pieces of sanitary paper. The multiple pieces of sanitary paper packaged in the collective packaging bag may be the sanitary paper packages of the present disclosure described above, or may be rolls of sanitary paper that are not packaged in a packaging bag.

[0131] The collective packaging bag of the present disclosure is made of a resin film, and the resin film constituting the collective packaging bag contains components derived from leftover materials from the collective packaging bag. As a result, collective packaging bags made of such a resin film have a low environmental impact.

[0132] Furthermore, the resin film that constitutes the collective packaging bag contains components derived from the leftover materials of the collective packaging bag, so that the load at 2% elongation in the MD direction is 2.0 N or more and 6.5 N or less. This type of resin film is difficult to stretch and is easy for the perforation blade to penetrate when forming the perforations for opening, so collective packaging bags made from this type of resin film have excellent openability.

[0133] In the collective packaging bag of the present disclosure, the components derived from the leftover materials of the collective packaging bag are not particularly limited, and examples thereof include resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), etc. Furthermore, examples of polyethylene include high-density polyethylene and low-density polyethylene.

[0134] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferred because they are flexible and easy to handle, have high heat-sealing properties, are inexpensive, etc. Furthermore, polyethylene is preferred because it is odorless, has excellent water and chemical resistance, and can be mass-produced at low cost.

[0135] In addition, from the viewpoint of ensuring the stability of the resin film constituting the collective packaging bag, it is preferable that the component derived from the leftover material of the collective packaging bag be the same type as the component of the resin film constituting the collective packaging bag. For example, if the component of the resin film constituting the collective packaging bag is polyethylene, it is preferable that the component derived from the leftover material of the collective packaging bag is also polyethylene.

[0136] In the collective packaging bag of the present disclosure, the collective packaging bag that is the source of the leftover material is a collective packaging bag that packages multiple sanitary paper packages. Furthermore, the leftover material of the collective packaging bag is preferably leftover material of the resin film used in the collective packaging bag and / or leftover material of the resin film used in the individual packaging bags made of resin film that package the sanitary paper.

[0137] The leftover resin film material used for the collective packaging bag is, for example, the remaining portion (trim) 320 after removing the portion 310 required for the packaging bag from the collective packaging bag material 300, as shown in Fig. 11. The leftover resin film material used for the individual packaging bags made of resin film for packaging sanitary paper is, for example, the trim 220 in the packaging bag material 200 shown in Figs. 5 and 9 described above.

[0138] In the collective packaging bag of the present disclosure, the remaining material of the packaging bag is thus scraps of the resin film used in the collective packaging bag, and therefore the printed components in the remaining material of the collective packaging bag are small. Therefore, in a collective packaging bag made of resin film containing such scraps, the color of the collective packaging bag can be made closer to the color of a collective packaging bag made from unrecycled or virgin materials.

[0139] Therefore, even if the resin film that makes up the collective packaging bag contains components derived from the leftover materials of the collective packaging bag, the collective packaging bag can be printed in various colors according to the manufacturer's wishes. This will encourage the reuse of materials in the field of sanitary paper as well, and promote efforts to realize a sustainable society.

[0140] In the collective packaging bag of the present disclosure, as described above, the resin film constituting the collective packaging bag contains components derived from leftover materials of the collective packaging bag, and therefore the load at 2% elongation in the TD direction can be 2.5 N or more and 7.0 N or less. Such a resin film is even less likely to stretch, and is easier for the perforation blade to penetrate when forming the perforations for opening, so collective packaging bags made of such a resin film have even better openability.

[0141] In the collective packaging bag of the present disclosure, as described above, the resin film constituting the collective packaging bag contains components derived from the leftover material of the collective packaging bag, which can result in a tear strength in the MD direction of 700 mN or more and 2000 mN or less. Such a resin film is even less likely to stretch, making it easier for a perforation blade to penetrate when forming perforations for opening, and therefore collective packaging bags made of such a resin film have even better openability.

[0142] In the collective packaging bag of the present disclosure, as described above, the resin film constituting the collective packaging bag contains components derived from the leftover material of the collective packaging bag, and thus the tensile modulus in the MD direction can be 150 MPa or more and 450 MPa or less. Because such a resin film easily maintains its shape, collective packaging bags made of such a resin film can stably store the sanitary paper packages contained in the collective packaging bag.

[0143] In the collective packaging bag of the present disclosure, the resin film constituting the collective packaging bag contains components derived from the leftover material of the collective packaging bag, as described above, and thus the tensile modulus in the TD direction can be 250 MPa or more and 500 MPa or less. Because such a resin film easily maintains its shape, collective packaging bags made of such a resin film can stably store the sanitary paper packages contained in the collective packaging bag.

[0144] In the collective packaging bag of the present disclosure, the resin film constituting the collective packaging bag contains components derived from the leftover material of the collective packaging bag, as described above, and thus the tensile elongation in the MD direction can be 500% or more and 850% or less. Such a resin film is even less likely to stretch, and is easier for the perforation blade to penetrate when forming the perforations for opening, so collective packaging bags made of such a resin film have even better openability.

[0145] In the collective packaging bag of the present disclosure, the resin film constituting the collective packaging bag contains components derived from the leftover material of the collective packaging bag, as described above, and therefore the tensile strength in the MD direction can be 10 N / cm or more and 30 N / cm or less. Such a resin film is more likely to retain its shape, so a collective packaging bag made of such a resin film can stably store the sanitary paper packages contained in the collective packaging bag.

[0146] In the collective packaging bag of the present disclosure, the resin film that constitutes the collective packaging bag contains 2% by mass or more of components derived from leftover materials from the collective packaging bag, which ensures that the resin film that constitutes the collective packaging bag is less likely to stretch, allowing collective packaging bags with excellent openability to be obtained with high precision.

[0147] As described above, in the collective packaging bag of the present disclosure, the content of printed components in the components derived from the leftover materials of the collective packaging bag is 0.2% by mass or less, so that even if the components derived from the leftover materials of the collective packaging bag include printed components, the color of the collective packaging bag can be made to approach the color of packaging bags made from unrecycled materials or virgin materials. Therefore, the collective packaging bag of the present disclosure can be printed in various colors as desired by the manufacturer.

[0148] <Manufacturing method of collective packaging bags> 12 is a diagram showing an original roll of resin film that constitutes the collective packaging bag. The manufacturing method of the collective packaging bag of the present disclosure is a method for manufacturing the above-mentioned collective packaging bag, and includes a step of producing the collective packaging bag using leftover material from the collective packaging bag.

[0149] Specifically, a collective packaging bag can be manufactured in the same manner as the manufacturing method of the packaging bag shown in Figures 6 to 10. Note that in the manufacturing method of the collective packaging bag of the present disclosure, points common to the manufacturing method of the packaging bag described above are denoted by the same or corresponding reference numerals, and description thereof will be omitted.

[0150] The method for manufacturing a collective packaging bag of the present disclosure includes a step (S1) of manufacturing a raw roll of resin film, a step (S2) of cutting the raw roll, a step (S3) of collecting leftover materials from collective packaging bags, and a step (S4) of manufacturing a raw roll of resin film using the leftover materials, as shown in Fig. 6. The steps S1 to S4 shown in Fig. 6 are an example of steps for manufacturing a collective packaging bag using leftover materials from collective packaging bags in the method for manufacturing a collective packaging bag of the present disclosure.

[0151] 9, the scrap 4 is an example of a leftover material of a collective packaging bag in the manufacturing method of a collective packaging bag of the present disclosure. The scrap 4 is also an example of a scrap material of a resin film used in a collective packaging bag and / or a scrap material of a resin film used in an individual packaging bag in the manufacturing method of a collective packaging bag of the present disclosure.

[0152] In the step (S1) of preparing a raw sheet of resin film, a raw sheet 5 of resin film in a long roll shape is wound into a roll, as shown in Fig. 12. The raw sheet 5 of resin film in a long roll shape is folded into a gusset shape. Handles 6 are provided at predetermined intervals on the raw sheet 5.

[0153] In the process (S2) of cutting the raw web, the wound raw web 5 is pulled out and cut at predetermined intervals.

[0154] The step (S3) of collecting the remaining materials of the collective packaging bag and the step (S4) of producing a raw roll of resin film using the remaining materials are the same as those for the packaging bag described above.

[0155] In the method for manufacturing a collective packaging bag of the present disclosure, the above-mentioned collective packaging bag is obtained by carrying out a step of producing a collective packaging bag using leftover materials from collective packaging bags. That is, in the method for manufacturing a collective packaging bag of the present disclosure, the resin film that constitutes the collective packaging bag that packages multiple pieces of sanitary paper contains components derived from the leftover materials from collective packaging bags, and therefore, by wrapping multiple pieces of sanitary paper in such a resin film, a collective packaging bag that has a low environmental impact and is easy to open is obtained.

[0156] Furthermore, in the manufacturing method of the collective packaging bag disclosed herein, the leftover material of the collective packaging bag is scraps of the resin film used for the collective packaging bag and / or scraps of the resin film used for the individual packaging bags, and by wrapping multiple pieces of sanitary paper in resin film made from such scraps, a collective packaging bag whose color is close to the color of collective packaging bags made from unrecycled or virgin materials can be obtained.

[0157] Furthermore, the manufacturing method of the assembly packaging bag of the present disclosure may be in an embodiment in which the original roll of resin film that constitutes the assembly packaging bag is not used, as will be shown below. Figure 13 is a flow diagram of a manufacturing method of a sanitary paper package that includes the manufacturing method of the assembly packaging bag. Figure 14 is a flow diagram for explaining a part of the process (production of the resin film) of the manufacturing method of a sanitary paper package that includes the manufacturing method of the assembly packaging bag.

[0158] 13, a method for manufacturing a sanitary paper package, including a method for manufacturing a collective packaging bag, includes a step (S10) of manufacturing sanitary paper, a step (S20) of packaging the manufactured sanitary paper in packaging material including a resin film, a step (S30) of collecting leftover materials from the collective packaging bag, and a step (S40) of manufacturing packaging material including a resin film using the leftover materials. Note that the step (S40) of manufacturing packaging material including a resin film using the leftover materials is an example of a step of manufacturing a collective packaging bag using leftover materials from a collective packaging bag in the method for manufacturing a collective packaging bag of the present disclosure.

[0159] In the step (S10) of producing sanitary paper, a known production method for producing the desired sanitary paper can be used.

[0160] The process of packaging sanitary paper (S20) may include, for example, a process of forming a long tubular packaging bag precursor from a packaging material containing a resin film (S21), a process of placing sanitary paper in the packaging precursor (S22), and a process of cutting and joining the packaging bag precursor at a position where there is no sanitary paper (S23), as shown in Figure 14.

[0161] More specifically, the process of packaging sanitary paper (S20) involves preparing a long resin film (packaging material) that will later become the packaging bag 20, and forming a resin film precursor (Fig. 14, S21). The resin film precursor is fed in a predetermined transport direction, and can be obtained by joining the ends of the long resin film in the width direction to form a cylindrical shape.

[0162] Alternatively, the resin film precursor may not be a flat sheet-like resin film, but may be a resin film formed into a long cylindrical shape. The long cylindrical resin film precursor can be transported by a transport unit (not shown) with the portion corresponding to the gusset of the packaging bag pre-folded inward, or it can be wound up in this state beforehand onto a roll and provided to the production line, and then unwound from the roll into the transport unit.

[0163] Next, sanitary paper is placed inside the packaging bag precursor (FIG. 14, S22). During this placement, multiple pieces of sanitary paper can be placed (packed) into the open side of the packaging bag precursor. At this time, air or the like can be blown into the flattened packaging bag precursor to open an opening large enough for the sanitary paper to pass through.

[0164] After the sanitary paper is placed inside the packaging bag precursor, the packaging bag precursor is cut along a direction perpendicular to the predetermined conveying direction at a position where the sanitary paper is not present, and then joined to obtain a sealed packaging bag (FIG. 14, S23). When cutting, scraps (also called trims) of the packaging material are cut off. In this specification, the scraps are an example of.

[0165] The resin films can be joined together by heat sealing, ultrasonic sealing, adhesives, etc. Of these, heat sealing is preferred because it is a less complicated operation and can form a more reliable bond.

[0166] The joining and cutting of the packaging bag precursor (FIG. 14, S23) can be performed by joining and / or cutting units (not shown) that are arranged above and below the packaging bag precursor and are capable of applying pressure and / or heat in the vertical direction (thickness direction). The joining and / or cutting units may be, for example, members that are arranged above and below the packaging bag precursor and are capable of applying pressure and / or heat in the vertical direction (thickness direction). The joining and / or cutting unit may be an integrated joining unit and cutting unit, or may include a joining unit and cutting unit that can move separately from each other. Therefore, the joining and cutting of packaging bag 20 may be performed simultaneously or at different times.

[0167] Before the sanitary paper is placed inside the packaging bag precursor, the packaging bag precursor is cut and joined upstream of the sanitary paper to form a packaging bag precursor with one end joined and the other end open. After the sanitary paper is placed inside the packaging bag precursor, the cutting and joining are performed downstream of the placed sanitary paper. However, the timing of the joining and cutting is not limited to this method. For example, when using pillow packaging or the like as described above, the packaging bag precursor can be cut and joined downstream and then upstream after the sanitary paper is placed inside the packaging bag precursor.

[0168] In this way, through the above steps S21 to S23, a plurality of sanitary paper sheets can be wrapped and sealed in the packaging material containing the resin film.

[0169] In this disclosure, furthermore, the waste materials generated during the process (S20) of packaging the sanitary paper in packaging material are collected (S30) and utilized. Note that in this specification, the concept of waste materials may include scraps generated during the cutting and joining process (S23) as described above, as well as defective products, including resin film portions that are not included in the finished packaging bag, packaging bag precursor portions, and packaging bags, for example, portions that did not become products due to missing prints, etc.

[0170] One possible way to recycle resin film is to collect packaging bags for sanitary paper that have already been used by users and then create a resin film from them, but the outer surface of the packaging bags is usually printed entirely to prevent the sanitary paper contained therein from being seen from the outside, to prevent the sanitary paper from being affected by light such as ultraviolet rays, etc. Therefore, when packaging bags are collected and the resin film is recycled, the color of the recycled resin film will be heavily dependent on the original packaging bag, and it may be difficult to print the recycled resin film in the desired color.

[0171] In contrast, leftover materials have less printing or many unprinted areas compared to the packaging bags in the finished product (sanitary paper packaging). Therefore, when a new resin film is produced using leftover materials according to this embodiment, that is, when a resin film containing components derived from leftover materials is produced, it is possible to obtain a resin film with a color close to the color (white, milky white, transparent, etc.) of a resin film produced from unrecycled materials (virgin materials).

[0172] Therefore, according to this embodiment, the recycled resin film can be printed in various colors as desired, which increases the freedom in the configuration and design of packaging bags made from recycled resin film, promoting the reuse of packaging bags made from resin film and, ultimately, efforts to realize a sustainable society in this field.

[0173] Furthermore, the recycled resin film produced by this manufacturing method uses materials collected during the manufacture of sanitary paper packaging, which means that the resin film contains fewer contaminants than when the packaging bags left over after consumers have removed the sanitary paper are collected and reused.Also, the refining process for removing contaminants and other such components can be eliminated or reduced during the production of the resin film.

[0174] The collection of packaging bag residues (S30) includes separating and collecting the residues from the product, and may be done by a dedicated device or by hand. The packaging bag residues collected in step S30 may be those generated during any step in the step (S20) of wrapping sanitary paper with packaging material, but are preferably scraps generated during the step (S23) of cutting and joining the packaging bag precursors at positions where there is no sanitary paper.

[0175] As described above, the packaging bag waste includes scraps and other scraps generated in the process of cutting and joining the packaging bag precursor (S23), but it is preferable that the packaging bag waste contains at least a large amount of resin film scraps, and it is even more preferable that it is resin film scraps.

[0176] The packaging bag 20 for sanitary paper is usually printed all over. Such printing can be applied in advance, for example, to the resin film that is the packaging material that will later be used to form the packaging bag 20. The printing may also include product information (not shown) about the details of the sanitary paper that is contained therein.

[0177] The printed portions of the packaging bag precursor are printed areas (not shown) that are entirely printed (have printed portions entirely) in the portions that will later become the packaging bag 20 (portions that will later constitute the packaging bag 20), but the portions between the portions that will later become the packaging bag 20 are inter-printed areas that are not printed or are entirely unprinted (do not have printed portions or are entirely free of printed portions). That is, the packaging bag precursor has printed areas and inter-printed areas alternately in the longitudinal direction (conveyance direction).

[0178] In the cutting and joining step (S23), the packaging bag precursor can be cut at a position within the region between the printed regions, specifically at the planned cutting positions. The region between the planned cutting positions is the planned scrap region that will become scrap after the cutting and joining step (S23). As described above, the region between the printed regions is an area with significantly fewer printed areas or no printed areas compared to the printed regions that will later form the packaging bag 20, so the planned scrap region, and therefore the resulting scrap, will also be an area with significantly fewer printed areas or no printed areas compared to the printed regions.

[0179] In the step (S40) of producing a resin film using the remaining material, the resin film can be produced by applying some of the steps (production of resin film) of the method for producing a packaging bag shown in FIG. 10 described above.

[0180] The process includes a step (S20) of packaging the produced sanitary paper in a packaging material containing a resin film, a step (S30) of collecting the remaining materials, and a step (S40) of producing a packaging material containing a resin film using the remaining materials. This series of steps can be repeated as shown in Figure 13. From the second round of this repeatable series of steps, the resin film made from the remaining materials (recycled resin film) can be used. This establishes a circular route for recycling resin materials. This will promote material recycling efforts in this field and contribute to achieving the Sustainable Development Goals.

[0181] As described above, the manufacturing method of the collective packaging bag disclosed herein includes a step of producing the collective packaging bag using leftover materials from the collective packaging bag, and therefore the resin film that makes up the packaging bag that packages the sanitary paper contains components derived from the leftover materials from the collective packaging bag. Therefore, by wrapping multiple pieces of sanitary paper in such a resin film, a collective packaging bag that has a low environmental impact and is easy to open can be obtained.

[0182] Furthermore, the manufacturing method of the collective packaging bag disclosed herein includes a step of producing the collective packaging bag using leftover materials from the collective packaging bag, and by packaging multiple pieces of sanitary paper in the collective packaging bag using such leftover materials, a collective packaging bag whose color is close to the color of a packaging bag made from unrecycled or virgin materials can be obtained. [Example]

[0183] The present invention will be described in more detail below using examples. The examples and comparative examples were evaluated by the following tests. Note that "%" is based on mass unless otherwise specified.

[0184] [Hygienic paper packaging and packaging bags] As shown in Figures 1 and 2, a sanitary paper package was prepared in which a sanitary paper laminate (manufactured by Daio Paper Co., Ltd., Ina Soft Pack Tissue 150 packs) consisting of multiple sets of two-ply tissue paper stacked in a pop-up style was placed in a resin film packaging bag with a take-out opening on the top surface. Polyethylene was used for the resin film constituting the packaging bag. In the example, scraps of the resin film used for the polyethylene film packaging bag were mixed into the resin film constituting the packaging bag as leftover material.

[0185] [Thickness of packaging bag] The thickness of the packaging bag was measured using a thickness measuring device (PEACOCK Dial Thickness Gauge G-1A, manufactured by Ozaki Seisakusho Co., Ltd.) by measuring the thickness of three points of the packaging bag six times each, and the average value was calculated as the paper thickness.

[0186] [Tensile strength of packaging bag] The tensile strength of the packaging bag was measured in accordance with the provisions of JIS P 7127 (1999). The unit of tensile strength is N / cm. Measurements were made five times in both the MD and CD directions, and the average of the measurements was used as the tensile strength in each direction.

[0187] [Tensile elongation of packaging bag] The tensile elongation of the packaging bag was measured in accordance with the provisions of JIS P 7127 (1999). The unit of tensile elongation is %. Measurements were made five times in each of the MD and CD directions, and the average of the measured values ​​was used as the tensile elongation in each direction.

[0188] [Load at 2% elongation of packaging bag] The load at 2% elongation of the packaging bag was measured in accordance with the provisions of JIS P 7127 (1999). The unit of the load at 2% elongation is N / 20cm. Measurements were taken five times in both the MD and CD directions, and the average of the measured values ​​was used as the load at 2% elongation in each direction.

[0189] [Tensile modulus of packaging bag] The tensile modulus of the packaging bag was measured in accordance with the provisions of JIS P 7127 (1999). The unit of tensile modulus is MPa. Measurements were made five times in each of the MD and CD directions, and the average of the measured values ​​was used as the tensile modulus in each direction.

[0190] [Tear strength of packaging bag] The tear strength of the packaging bag was measured in accordance with the provisions of JIS P 7128-2 (1998). The unit of tear strength is mN. Measurements were made five times in each of the MD and CD directions, and the average of the measurements was used as the tear strength in each direction.

[0191] [HAZE on packaging bags] The haze of the packaging bags was measured in accordance with the JIS K 7136 (2000) standard. Haze is an index that indicates the degree of cloudiness (or the degree of light diffusion) of a material, and is expressed in %. Five measurements were taken, and the average of the measurements was taken as the haze. A haze of 12% or less was rated as good, and a haze of more than 12% was rated as poor.

[0192] [Glossiness of packaging bag] The glossiness of the packaging bags was measured in accordance with the provisions of JIS P 8142 (2005). Glossiness is an index of glossiness, expressed in units of %, and is the ratio of the intensity of incident light to specularly reflected light when light is irradiated onto an object. Measurements were made five times, and the average of the measured values ​​was taken as the glossiness. A glossiness of 100% or more was rated as good, and a glossiness of less than 100% was rated as poor.

[0193] [Openability] The openability of the packaging bag was checked. To check the openability, 10 mm from the left end of the opening was opened, a clip (25 mm double clip, manufactured by Kokuyo Co., Ltd.) was clamped there, an attachment was attached to a push-pull gauge (Z2-20N, manufactured by Imada Co., Ltd.), the clip was hooked onto the attachment, and the opening strength was measured when it was pulled up at a 45° angle at a speed of 150 mm / sec. The opening strength is measured in N. Five measurements were taken, and the average of the opening strength measurements was taken as the openability. An opening strength of 1.5 N or more but less than 1.9 N was rated as excellent, 1.3 N or more but less than 1.5 N or 1.9 N or more but less than 2.1 N was rated as good, and all other cases were rated as poor.

[0194] [Pop-up] The degree of sagging of the sanitary paper was checked when the sanitary paper was pulled out from the first set to the last set of sanitary paper in the sanitary paper package. Evaluation was based on the following criteria: 0 to 5 saggings were rated as good, and 6 to 10 saggings were rated as poor.

[0195] [Drawability] An attachment was attached to a push-pull gauge (IMADA, Z2-20N), a clip (KOKUYO, double clip, 25 mm) was attached to the attachment, and the center 10 mm of each sanitary tissue was clamped with the clip. The first set of tissue was pulled out, and the pull-out strength of the second to fifth sets was measured for five samples. The pull-out strength is measured in N. The tissue was pulled perpendicular to the top of the packaging bag at a pulling speed of 230 mm / sec. The pull-out strength was the maximum value before the tissue separated from the packaging bag. Pull-out properties were rated as excellent if the pull-out strength was less than 1.5 N, good if between 1.5 N and 2.0 N, and poor if 2.0 N or more.

[0196] [Appearance of packaging bag] A sensory evaluation was conducted by 10 subjects, and the appearance of the packaging bag was evaluated based on whether foreign matter was noticeable or not, compared to a conventional product (Comparative Example 1). The appearance was evaluated as excellent if 0 subjects were bothered by the appearance, good if 1 to 5 subjects were bothered by the appearance, and poor if 6 or more subjects were bothered by the appearance.

[0197] [Environmental friendliness of packaging bags] The environmental friendliness of the packaging bags was evaluated. Environmental friendliness was evaluated as excellent if the content of packaging bag waste material in the resin film that makes up the packaging bag was over 10%, good if it was over 0% but not more than 10%, and poor if it was 0%.

[0198] Examples and comparative examples will be described below.

[0199] [Example 1] A hygienic paper package was fabricated and evaluated. The packaging bag contained 5% resin film scraps, had a thickness of 40 μm, a tensile strength of 18.5 N / cm in the MD direction and 19.0 N / cm in the TD direction, a tensile elongation of 640% in the MD direction and 780% in the TD direction, a load at 2% elongation of 3.69 N / 20 cm in the MD direction and 4.42 N / 20 cm in the TD direction, a tensile modulus of 279 MPa in the MD direction and 349 MPa in the TD direction, and a tear strength of 1352 mN in the MD direction and 11072 mN in the TD direction. The results are shown in Table 1.

[0200] [Example 2] The proportion of resin film scraps used in the packaging bag without printed components was 20%, the tensile strength was 19.4 N / cm in the MD direction and 19.4 N / cm in the TD direction, the tensile elongation was 655% in the MD direction and 755% in the TD direction, the load at 2% elongation was 3.70 N / 20 cm in the MD direction and 4.42 N / 20 cm in the TD direction, the tensile modulus was 271 MPa in the MD direction and 341 MPa in the TD direction, and the tear strength was 1440 mN in the MD direction and 11520 mN in the TD direction. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0201] [Example 3] The proportion of resin film scraps used in the packaging bag without 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 tensile elongation was 656% in the MD direction and 746% in the TD direction, the load at 2% elongation was 3.75 N / 20 cm in the MD direction and 4.48 N / 20 cm 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. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0202] [Example 4] The percentage of scraps in the resin film used for the packaging bag was 3%, the percentage of printed components (components other than polyethylene) contained in the scraps (hereinafter referred to as the scrap printing percentage) was 0.9%, and the percentage of printed components in the entire resin film making up the packaging bag (hereinafter referred to as the scrap printing percentage / total 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 tensile elongation was 714% in the MD direction and 728% in the TD direction. The load at 2% elongation was 4.39 N / 20 cm in the MD direction and 5.60 N / 20 cm in the TD direction. The tensile modulus was 370 MPa in the MD direction and 479 MPa in the TD direction. The tear strength was 1157 mN in the MD direction and 11000 mN in the TD direction. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0203] [Example 5] The proportion of resin film scraps used in the packaging bag was 5%, the scrap printing ratio / total 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 tensile elongation was 668% in the MD direction and 714% in the TD direction, the load at 2% elongation was 4.60 N / 20 cm in the MD direction and 5.62 N / 20 cm 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. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 4. The results are shown in Table 1.

[0204] [Example 6] The proportion of resin film scraps used in the packaging bag was 10%, the scrap printing ratio / total film was 0.09%, the tensile strength was 17.6 N / cm in the MD direction and 17.3 N / cm in the TD direction, the tensile elongation was 621% in the MD direction and 700% in the TD direction, the load at 2% elongation was 4.82 N / 20 cm in the MD direction and 5.64 N / 20 cm 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 11,800 mN in the TD direction. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 4. The results are shown in Table 1.

[0205] [Example 7] The thickness was 35 μm (the 35 μm thickness was assumed to be the thickness of a collective packaging bag), the tensile strength was 16.6 N / cm in the MD direction and 16.9 N / cm in the TD direction, the tensile 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. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 2. The results are shown in Table 1.

[0206] [Example 8] The proportion of resin film scraps used in the packaging bag was 25%, the scrap printing ratio / total 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 tensile elongation was 550% in the MD direction and 678% in the TD direction, the load at 2% elongation was 5.13 N / 20 cm in the MD direction and 5.68 N / 20 cm 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 12,000 mN in the TD direction. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 4. The results are shown in Table 1.

[0207] [Comparative Example 1] The resin film constituting the packaging bag did not contain any scraps of the resin film used in the packaging bag (the proportion of scraps of the resin film used in the packaging bag was 0%), and the tensile strength was 18.5 N / cm in the MD direction and 18.4 N / cm in the TD direction, the tensile elongation was 650% in the MD direction and 790% in the TD direction, the load at 2% elongation was 3.52 N / 20 cm in the MD direction and 4.18 N / 20 cm in the TD direction, the tensile modulus was 265 MPa in the MD direction and 331 MPa in the TD direction, and the tear strength was 1424 mN in the MD direction and 11072 mN in the TD direction. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0208] Comparative Example 2 The resin film constituting the packaging bag did not contain any scraps of the resin film used in the packaging bag (the proportion of scraps of the resin film used in the packaging bag was 0%), and the tensile strength was 16.9 N / cm in the MD direction and 17.0 N / cm in the TD direction, the tensile elongation was 610% in the MD direction and 765% in the TD direction, the load at 2% elongation was 3.19 N / 20 cm in the MD direction and 3.75 N / 20 cm in the TD direction, the tensile modulus was 227 MPa in the MD direction and 311 MPa in the TD direction, and the tear strength was 1128 mN in the MD direction and 10240 mN in the TD direction. Other than that, a sanitary paper package was produced and evaluated in the same manner as in Example 7. The results are shown in Table 1.

[0209] [Table 1]

[0210] As shown in Table 1, in Examples 1 to 8, the sanitary paper packages using packaging bags in which the resin film constituting the packaging bag contained components derived from leftover packaging bag materials and the load at 2% elongation in the MD direction was 2.5 N or more and 6.5 N or less were good in environmental compatibility. In addition, compared to the sanitary paper packages of Comparative Examples 1 and 2 (conventional sanitary paper packages), the haze, gloss, and openability were good.

[0211] Furthermore, in Examples 1 to 7, the sanitary paper packages using packaging bags in which the content of printing components in the components derived from waste materials was 0.2 mass% or less had even better appearance and better pop-up and pull-out properties.

[0212] Furthermore, in Examples 2 and 3, the sanitary paper packages in which the content of components derived from leftover materials in the resin film constituting the packaging bag was 20% by mass or more were even more environmentally friendly.

[0213] Although the embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims. [Explanation of symbols]

[0214] 1 Original fabric 2 Print area P printing C cutting line T Trim Area 3. Rolled resin film 4 Scraps 5 Original fabric 6 Handle 100 Sanitary paper packaging 10 Sanitary paper laminate 10A Sanitary Paper (Tissue Paper) 11 Top 12 Bottom 13, 14 long side 15, 16 short side LD stacking direction 20 packaging bags 21 Top 22 bottom 23 Front 24 Back 25 Side 26 Side 30 Outlet 31 Central part 32, 33 End M perforation OP Opening 200 Packaging bag materials 210 Printed part 220 Remaining part (trim) 300 Materials for assembly packaging bags 310 Necessary Parts 320 Remaining part (trim)

Claims

1. A packaging bag made of resin film for packaging sanitary paper, The resin film contains a component derived from a leftover material of the packaging bag, and The load at 2% elongation in the MD direction of the resin film is 2.0 N or more and 6.5 N or less. packaging bag.

2. The remaining material is a scrap of a resin film used for the packaging bag. The packaging bag according to claim 1.

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

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

5. 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. The packaging bag according to claim 1.

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

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

8. 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. The packaging bag according to claim 1.

9. The content of components derived from the waste material in the resin film constituting the packaging bag is 2% by mass or more. The packaging bag according to claim 1.

10. The content of the printing component in the component derived from the residue is 0.2% by mass or less. The packaging bag according to claim 1.

11. The packaging bag according to any one of claims 1 to 10; and sanitary paper contained in the packaging bag. Sanitary paper packaging.

12. A method for manufacturing the packaging bag according to any one of claims 1 to 10, A process for producing a raw sheet of the resin film using a leftover material of the packaging bag is included. Manufacturing method of packaging bags.

13. A resin film collective packaging bag for packaging multiple sanitary papers, The resin film contains a component derived from the leftover material of the collective packaging bag, The load at 2% elongation in the MD direction of the resin film is 2.0 N or more and 6.5 N or less. Collective packaging bag.

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

15. A method for manufacturing the collective packaging bag according to claim 13 or 14, A step of producing the collective packaging bag using leftover materials from the collective packaging bag, Manufacturing method of collective packaging bags.

Images