Packaging bag and sheet package

Abstract

To provide a packaging bag which is easy to open, and in which a sheet is easy to take out, the sheet to be taken out is hard to break, and the sheet hardly breaks at the time of taking out, even in the case where the packaging bag has hardly any flexibility.SOLUTION: In a packaging bag, a plurality of laminated sheets are stored, and a sheet take-out port is provided at a top surface. The take-out port has: a pair of first perforations extending in a first direction of the packaging bag, and arranged having a predetermined interval in a second direction orthogonal to the first direction; a pair of second perforations continued to end parts of the first perforations and extending in the second direction between the first perforations; and a pair of third perforations which are continued to the end parts of the first perforations and extending in a direction separated from the first perforations, and in which the interval in the second direction becomes larger as it is further separated from the first perforations.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a packaging bag and a sheet packaging body. [Background technology]

[0002] Sheet packages containing sheets such as tissue paper are distributed in the form of multiple sheets contained in a packaging bag made of resin film (for example, Patent Documents 1 and 2). On the other hand, from the viewpoint of reducing the amount of resin used in the packaging bag, a package in which a layered paper product is covered with a packaging base material containing paper is known (for example, Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7312282 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-22799 [Patent Document 3] Japanese Patent Publication No. 2021-123339 Summary of the Invention [Problem to be solved by the invention]

[0004] However, paper packaging bags are almost as flexible as plastic packaging bags, making them difficult to open, making it difficult to remove the sheets, and making it easy for the sheets to tear when being removed, and the packaging bag itself to tear when the sheets are removed.

[0005] To provide a packaging bag which is easy to open, easy to take out a sheet from, and hardly breaks when the sheet is taken out, even when the packaging bag has almost no flexibility. [Means for solving the problem]

[0006] A first aspect of the present invention is a packaging bag that contains a plurality of stacked sheets and has an opening for removing the sheets on the top surface, the opening having a pair of first perforations that extend in a first direction of the packaging bag and are arranged at a predetermined interval in a second direction perpendicular to the first direction, a pair of second perforations that are continuous with the ends of the first perforations and extend between the first perforations in the second direction, and a pair of third perforations that are continuous with the ends of the first perforations and extend in a direction away from the first perforations, the spacing in the second direction increasing with increasing distance from the first perforations.

[0007] In the first aspect, a pair of first perforations extending in a first direction of the packaging bag are arranged at a predetermined interval in a second direction perpendicular to the first direction, and a pair of second perforations extending in the second direction between the first perforations are continuous with the ends of the first perforations, so that the area surrounded by the pair of first perforations and the pair of second perforations has a predetermined length and a predetermined interval. As a result, in the first aspect, even if the packaging bag has almost no flexibility, the area surrounded by the pair of first perforations and the pair of second perforations is easy to grasp, making it easy to open the packaging bag via the first perforations and the second perforations.

[0008] In addition, in the first aspect, a pair of third perforations extending in a direction away from the first perforations are continuous with the ends of a pair of first perforations extending in a first direction, and the spacing in the second direction becomes wider as they move away from the first perforations, so that when the first perforations, second perforations, and third perforations are torn open, a pair of flaps surrounded by the first perforations and the third perforations is formed in the second direction, and a pair of flaps surrounded by the second perforations and the pair of third perforations is formed in the first direction.

[0009] As a result, in the first aspect, the force applied to the removal opening when the sheet is removed is cushioned by the first direction flap and the second direction flap, making it easier to remove the sheet even if the packaging bag has little flexibility, making the removed sheet less likely to tear, and making the packaging bag less likely to tear when the sheet is removed.

[0010] Furthermore, in the first aspect, when multiple sheets are stacked alternately in a folded state (so-called pop-up stacking), after the first sheet is removed, the second and subsequent sheets are likely to be pinched between the flap facing in the first direction and the flap facing in the second direction. Therefore, in the first aspect, even if the packaging bag has almost no flexibility, the sheets are likely to be held at the removal opening, and it is possible to prevent the sheets from falling at the removal opening.

[0011] A second aspect of the present invention is the packaging bag according to the first aspect, which is made of 100% paper. In the second aspect, since the packaging bag is made of 100% paper, it is possible to reduce the amount of resin used in the packaging bag.

[0012] In the second aspect, a packaging bag made of 100% paper has almost no flexibility, but as described above, the area surrounded by a pair of first perforations and a pair of second perforations has a predetermined length and a predetermined spacing, making the packaging bag easy to open. Also, as described above, by forming a pair of flaps in the first direction and a pair of flaps in the second direction, the sheet is easy to remove, the removed sheet is less likely to tear, the packaging bag is less likely to tear when the sheet is removed, and the sheet can be prevented from falling.

[0013] A third aspect of the present invention is the packaging bag according to the first or second aspect, wherein the first direction of the packaging bag is the CD direction of the base material constituting the packaging bag. In this specification, the CD direction refers to a direction perpendicular to the MD direction (machine direction). In the third aspect, since the first direction of the packaging bag is the CD direction of the base material constituting the packaging bag, the direction in which the first perforation extends is the CD direction of the base material constituting the packaging bag. As a result, in the third aspect, the first perforation is formed in the CD direction, which is the direction in which the base material constituting the packaging bag is less likely to tear, and therefore, unexpected tearing of the first perforation can be prevented.

[0014] A fourth aspect of the present invention is the packaging bag according to any one of the first to third aspects, wherein a pair of side surfaces of the packaging bag facing the first direction are sealed with caramel wrapping. In the fourth aspect, because the pair of side surfaces of the packaging bag facing the first direction are sealed with caramel wrapping, even if the amount of sheet inside the packaging bag decreases and a space is created inside the packaging bag, the packaging bag is less likely to be crushed in the vertical direction, and because a pair of flaps are formed in each of the first and second directions as described above, it is possible to prevent the sheet from falling.

[0015] A fifth aspect of the present invention is the packaging bag according to any one of the first to fourth aspects, wherein the angle between the first perforation and the third perforation is between 85 degrees and 119 degrees. In the fifth aspect, when the angle between the first perforation and the third perforation is between 85 degrees and 119 degrees, the distance from the base end to the tip end of the flaps facing in the first direction does not become too long, so that when sheets are stacked in a pop-up style, the second and subsequent sheets are more likely to be sandwiched between the flaps facing in the first direction and the flaps facing in the second direction. Therefore, in the fifth aspect, it is possible to reliably prevent sheets from falling into the take-out opening.

[0016] A sixth aspect of the present invention is the packaging bag according to any one of the first to fifth aspects, wherein the spacing between the third perforations in the second direction is 25% to 50% of the length of the top surface in the second direction. In the sixth aspect, the spacing between the third perforations in the second direction is 25% to 50% of the length of the top surface in the second direction, so that the distance from the base end to the tip end of the flaps facing in the second direction does not become too short. This makes it easier for the second and subsequent sheets to be sandwiched between the flaps facing in the first direction and the flaps facing in the second direction when stacked in a pop-up style. Therefore, the sixth aspect reliably prevents sheets from falling into the take-out opening.

[0017] A seventh aspect of the present invention is the packaging bag according to any one of the first to sixth aspects, wherein the shortest distance between the end of the first perforation, where the third perforation is continuous, and the edge of the top surface in the first direction is 10% to 30% of the length of the top surface in the first direction. In the seventh aspect, since the shortest distance between the end of the first perforation, where the third perforation is continuous, and the edge of the top surface in the first direction is 10% to 30% of the length of the top surface in the first direction, the shortest distance between the end of the first perforation and the edge of the top surface in the first direction is not too long, making it easier for the sheet to be sandwiched between the flap facing in the first direction and the flap facing in the second direction. Therefore, in the seventh aspect, it is possible to reliably prevent the sheet from falling into the dispensing opening.

[0018] An eighth aspect of the present invention is the packaging bag according to any one of the first to seventh aspects, wherein the length of the tie at the third perforation is 0.6 mm or more and 2 mm or less. In the eighth aspect, the length of the tie at the third perforation is 0.6 mm or more and 2 mm or less, so that the third perforation can be torn by the force applied to the dispensing opening when the sheet is removed. Therefore, in the eighth aspect, it is not necessary to tear the third perforation when opening the packaging bag. Furthermore, by providing a tie at the third perforation with a length of 0.6 mm or more and 2 mm or less, it is possible to prevent the third perforation from unexpectedly tearing.

[0019] A ninth aspect of the present invention is the packaging bag according to any one of the first to eighth aspects, which has a first slit that forms an arc-shaped opening at the tip of the third perforation. In the ninth aspect, by having a first slit that forms an arc-shaped opening at the tip of the third perforation, the tip of the slit formed after the third perforation is ruptured is less likely to tear. Therefore, in the ninth aspect, the sheet is easy to remove, the removed sheet is less likely to tear, the packaging bag is less likely to tear when the sheet is removed, and it is possible to maintain a state in which the sheet does not fall down.

[0020] A tenth aspect of the present invention is the packaging bag according to the ninth aspect, wherein the angle of the portion of the imaginary circle including the arc where no arc exists is between 60 degrees and 119 degrees. In the tenth aspect, since the angle of the portion of the imaginary circle including the arc where no arc exists is between 60 degrees and 119 degrees, it is possible to prevent the tip of the third perforation from curling up or tearing before the packaging bag is used.

[0021] An eleventh aspect of the present invention is the packaging bag according to the ninth or tenth aspect, wherein the diameter of an imaginary circle including the arc is 7 mm or less. In the eleventh aspect, by setting the diameter of the arc to 7 mm or less, it is possible to reliably prevent the tip of the third perforation from turning up or tearing.

[0022] A twelfth aspect of the present invention is the packaging bag according to any one of the first to eleventh aspects, wherein the second perforation curves in a direction away from the first perforation. In the twelfth aspect, the second perforation curves in a direction away from the first perforation, so that the force applied to the dispensing opening when the sheet is removed can be released in the first direction. Therefore, in the twelfth aspect, both ends of the dispensing opening in the first direction are less likely to tear, and as a result, the tip of the flap facing the first direction is less likely to tear.

[0023] A thirteenth aspect of the present invention is the packaging bag according to any one of the first to twelfth aspects, wherein the length of the tie at the second perforation is 0.6 mm or more and 2 mm or less. In the thirteenth aspect, the length of the tie at the second perforation is 0.6 mm or more and 2 mm or less, thereby making it possible to prevent both ends of the dispensing opening in the first direction from turning up before the packaging bag is opened or from tearing unexpectedly.

[0024] A fourteenth aspect of the present invention is the packaging bag according to any one of the first to thirteenth aspects, which has a second slit that is continuous with an intermediate portion of the first perforations and extends between the first perforations in the second direction. In the fourteenth aspect, the second slit that is continuous with the intermediate portion of the first perforations extends between the first perforations in the second direction, so that the packaging bag can be opened through the second slit.

[0025] A fifteenth aspect of the present invention is a sheet packaging body including the packaging bag according to any one of the first to fourteenth aspects and a sheet contained in the packaging bag. In the fifteenth aspect, by configuring a sheet packaging body in which a sheet is contained in the packaging bag, the same effects as the packaging bag described above can be obtained. That is, according to the fifteenth aspect, the packaging bag is easy to open, the sheet is easy to remove, the removed sheet is not easily torn, the packaging bag is not easily torn when the sheet is removed, and the sheet can be prevented from falling. [Effects of the Invention]

[0026] According to one aspect of the present invention, a packaging bag is provided that is easy to open, the sheet can be easily removed, the removed sheet is not easily torn, and the sheet is not easily torn when being removed, even if the packaging bag has almost no flexibility. [Brief explanation of the drawings]

[0027] [Figure 1] 1A and 1B are diagrams showing an example of a sheet packaging body using the packaging bag of the embodiment. [Figure 2] 1A and 1B are diagrams illustrating an example of a sheet contained in a packaging bag according to an embodiment. [Figure 3] FIG. 2 is a view of FIG. 1 as seen from the top side. [Figure 4] FIG. 4 is a diagram showing a state in which the outlet in FIG. 3 is open. [Figure 5] FIG. 4 is a diagram showing only the first perforation, the second perforation, and the third perforation in FIG. 3. [Figure 6] 4 is a diagram showing the shortest distance between the end of the first perforation, to which the third perforation is continuous, and the edge of the top surface of the packaging bag in the first direction in FIG. 3. FIG. [Figure 7] FIG. 4 is an enlarged view of a portion of the third perforation in FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Common parts in the drawings will be designated by the same reference numerals and their explanations may be omitted. Also, the scale of each component in each drawing may differ from the actual scale.

[0029] In this specification, directions in the drawings are explained using a three-dimensional Cartesian coordinate system with three axial directions (X, Y, and Z). In each drawing, the left-right direction (the longitudinal direction of the sheet laminate, packaging bag, or sheet packaging body) is the X direction, the front-rear direction (the lateral direction of the sheet laminate, packaging bag, or sheet packaging body) is the Y direction, and the up-down direction (the height direction of the sheet laminate, packaging bag, or sheet packaging body) is the Z direction.

[0030] 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.

[0031] Fig. 1 is a diagram showing an example of a sheet package using the packaging bag of the embodiment. Fig. 2 is a diagram showing a sheet contained 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 Fig. 3 in a state where the outlet is open.

[0032] The packaging bag 10 constitutes a part of the sheet packaging body 100. As shown in Fig. 2, the packaging bag 10 contains a plurality of stacked sheets S (a sheet stack SL). The sheet stack SL is contained in the packaging bag 10 so that the stacking direction of the sheets S is the height direction (Z direction). The sheet stack SL is configured so that the sheets S can be pulled out one set at a time through an outlet (opening OP) formed in the packaging bag 10, which will be described later.

[0033] The form of the sheet stack SL is not particularly limited, and may be, for example, a stack of sheets S in a folded state, a stack of sheets S in a folded state and stacked alternately (a so-called pop-up sheet stack), or a stack of multiple sheets S simply stacked.

[0034] The dimensions of the sheet S (sheet laminate SL) can be about 150 to 250 mm in the longitudinal direction (X direction) of the packaging bag 10, about 70 to 150 mm in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the packaging bag 10, and about 20 to 100 mm in the height direction (Z direction). Such a tissue paper laminate can be manufactured, for example, by a rotary or multi-stand interfolder.

[0035] The form of the sheet S is not particularly limited, and it 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 tissue, etc.).

[0036] The use of the sheet S is not particularly limited, and it can be used for industrial, home, or portable purposes. Among these, tissue paper for home or portable use is preferably used as the sheet in this embodiment.

[0037] The number of plies of the sheet S is not particularly limited, but can be one or more, and is preferably one or two (two layers stacked together). The shape of the sheet S is also not particularly limited, but it is preferable that, for example, a one-ply sheet has a quadrangular (rectangular, square, etc.) outline shape when folded.

[0038] The material of the sheet S is not particularly limited, but may be, for example, a sheet of paper, nonwoven fabric, or cloth, and is preferably paper (paper sheet). When the sheet S is a paper sheet, base paper containing pulp as the main raw material is used. The pulp composition may be any known composition for paper sheets. For example, the pulp content may be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0039] Furthermore, there are no particular limitations on the pulp composition of the paper sheet used for the sheet S. 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.

[0040] The ratio of hardwood pulp to softwood pulp in the paper sheet 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 the paper sheet.

[0041] The basis weight of the sheet S 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).

[0042] The thickness of the paper sheet is not particularly limited, and can be the paper thickness measured under the environment of JIS P 8111 (1998). For example, when the sheet S is paper, the thickness is 50 μm or more and 600 μm or less, preferably 60 μm or more and 500 μm or less, and more preferably 130 μm or more and 400 μm or less per two plies.

[0043] The paper sheet used for the sheet S may be embossed. Such embossing can be carried out by a known embossing method. The embossing method is not particularly limited, and examples thereof include a steel rubber method and a steel match method.

[0044] There is no particular limitation on the material of the packaging bag 10. The material of the packaging bag 10 is, for example, resin, a laminate of resin and paper, or paper. The packaging bag 10 of this embodiment is made of 100% paper.

[0045] When a resin is used for the packaging bag 10, the type of resin is not particularly limited. Examples of resins that can be used for the packaging bag 10 include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), etc. As the polyethylene, high-density polyethylene, low-density polyethylene, etc. can be used.

[0046] In addition, biodegradable materials (biodegradable plastics such as polylactic acid, etc.) and biomass materials (renewable organic resources derived from living organisms, such as biomass film, excluding fossil resources) can be used as the resin that makes up the packaging bag 10.

[0047] The form of the resin film forming the packaging bag 10 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.

[0048] The thickness of the resin constituting the packaging bag 10 is not particularly limited, and is preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 70 μm or less, and even more preferably 30 μm or more and 50 μm or less. By making the thickness of the resin film 20 μm or more, it is possible to ensure sufficient strength for the packaging bag 10 in which the sheet S is contained. Furthermore, by making the thickness of the resin film 100 μm or less, it is possible to ensure the lightweight nature of the packaging bag 10 and reduce costs.

[0049] When paper is used for the packaging bag 10, the type of paper is not particularly limited. Examples of paper that can be used for the packaging bag 10 include kraft paper and rayon paper. Note that the kraft paper may be one-sided glossy kraft paper.

[0050] Here, kraft paper is paper made from kraft pulp. Rayon paper is made by blending rayon fiber, which is chemically synthesized from wood pulp, with kraft pulp. From the perspective of achieving both softness and strength in the packaging bag 10, it is preferable that the rayon fiber content of the rayon paper be 20% or less by mass.

[0051] The basis weight of the paper used for the packaging bag 10 is not limited, but is preferably 20 g / m 2 More than 80g / m 2 or less, more preferably 25 g / m 2 More than 70g / m 2 or less, more preferably 30 g / m 2 More than 60g / m 2 The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0052] The thickness of the paper used for the packaging bag 10 is not limited, but is, for example, preferably 20 μm or more and 300 μm or less, more preferably 30 μm or more and 200 μm or less, and even more preferably 40 μm or more and 180 μm or less. The thickness is measured in accordance with the provisions of JIS P 8118 (2014).

[0053] The paper used for the packaging bag 10 may be embossed. Such embossing can be performed by a known embossing method. The embossing method is not particularly limited, and examples thereof include a steel rubber method and a steel match method.

[0054] In addition, when the paper used for the packaging bag 10 is embossed, the thickness of the paper indicates the thickness of the paper before being embossed.

[0055] In this embodiment, the packaging bag 10 is preferably made of 100% paper.

[0056] The packaging bag 10 is made of a base material having an MD direction and a CD direction. The MD direction is the machine direction of the base material, and the CD direction is a direction perpendicular to the machine direction of the base material (cross direction).

[0057] In this embodiment, the first direction (X direction) of the packaging bag 10 is preferably the CD direction of the base material that constitutes the packaging bag 10.

[0058] The shape of the packaging bag 10 is not particularly limited, but is generally a rectangular parallelepiped when the sheet laminate SL is housed in the packaging bag 10. Such a generally rectangular parallelepiped packaging bag 10 has a top surface 11, a bottom surface 12, side surfaces 13 and 14, end surfaces 15 and 16. As shown in Figures 1, 3, and 4, the top surface 11 and the bottom surface 12 face each other in the vertical direction (Z direction), the side surfaces 13 and 14 face each other in the width direction (Y direction), and the end surfaces 15 and 16 face each other in the longitudinal direction (X direction). Furthermore, the end surfaces 15 and 16 are continuous with all of the top surface 11, bottom surface 12, side surfaces 13, and side surfaces 14.

[0059] The longitudinal direction (X direction) corresponds to the first direction in the packaging bag 10 of this embodiment, and the width direction (Y direction) corresponds to the second direction in the packaging bag 10 of this embodiment.

[0060] The dimensions of the packaging bag 10 are not particularly limited. For example, as shown in Figures 1 and 3, the length L1 of the packaging bag 10 in the longitudinal direction (X direction) can be about 150 to 250 mm, the length S1 of the packaging bag 10 in the lateral direction (Y direction) perpendicular to the longitudinal direction (X direction) can be about 70 to 150 mm, and the height H1 in the height direction (Z direction) can be about 20 to 100 mm. Note that the dimensions of the packaging bag 10 are the dimensions when a sheet laminate SL is contained in the packaging bag 10, as shown in Figures 1 and 2.

[0061] There are no particular limitations on the packaging form of the packaging bag 10. Examples of packaging forms that can be used for the packaging bag 10 include 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 is sealed (pillow packaging), packaging in which a heat-shrinkable resin film is heated to make it adhere tightly to the packaged item (shrink packaging), and packaging that combines these.

[0062] In this embodiment, a pair of side surfaces (end surfaces 15, 16 in this embodiment) of the packaging bag 10 facing each other in the first direction (X direction) are sealed with caramel packaging.

[0063] A take-out opening 20 is formed on the top surface 11 of the packaging bag 10. The take-out opening 20 has a pair of first perforations 21, 22, a pair of second perforations 23, 24, and a pair of third perforations 30, 40 and 50, 60. In this specification, the perforations are tear-opening score lines in which cuts and ties (uncut portions between two cuts) are arranged alternately, and when a tie is broken, the adjacent cuts on both sides become continuous cuts.

[0064] The pair of first perforations 21, 22 extend in a first direction (X direction) of the packaging bag 10. The pair of first perforations 21, 22 are also arranged at a predetermined interval S2 in a second direction (Y direction) perpendicular to the first direction.

[0065] The lengths of the cuts and ties in the first perforations 21 and 22 are arbitrary. The length of each cut in the first perforations 21 and 22 can be 1.0 mm to 5.0 mm, preferably 1.5 mm to 4.5 mm, and more preferably 2.5 mm to 3.5 mm. The length of each tie can be 0.3 mm to 1.2 mm, preferably 0.4 mm to 1.1 mm, and more preferably 0.5 mm to 1.0 mm.

[0066] The length of the tie, the remaining tie portion (hereinafter referred to as "remaining tie portion"), and the ease of opening the packaging bag were checked at the first perforations 21 and 22. The results are shown in Table 1.

[0067] [Table 1]

[0068] The remaining tie portions were evaluated as A if all ties remained before the first perforations 21 and 22 were torn, B if only some ties remained, and C if no ties remained. The openability was evaluated as A if the packaging bag 10 was very easy to open when the subject tore the first perforations 21 and 22, B if the packaging bag 10 could be opened, and C if the packaging bag 10 could not be opened.

[0069] As can be seen from Table 1, when the length of the tie at the first perforations 21 and 22 was 0.5 mm, 0.75 mm, or 1.0 mm, both the remaining tie portion and the ease of opening were good. On the other hand, when the length of the tie was 1.5 mm, the remaining tie portion was good, but the ease of opening was poor.

[0070] The pair of second perforations 23, 24 are continuous with the ends 21A, 21B, 22A, 22B of the first perforations 21, 22. The pair of second perforations 23, 24 extend in the second direction (Y direction) between the first perforations 21, 22. The pair of second perforations 23, 24 may be curved in a direction away from the first perforations 21, 22, as shown in Figures 1, 3, and 4.

[0071] The lengths of the cuts and ties in the second perforations 23, 24 are arbitrary. The length of each cut in the second perforations 23, 24 can be 1.0 mm to 5.0 mm, preferably 1.5 mm to 4.5 mm, and more preferably 2.5 mm to 3.5 mm. The length of each tie can be 0.6 mm to 2 mm, preferably 0.7 mm to 1.8 mm, and more preferably 0.75 mm to 1.5 mm.

[0072] The length of the tie, the remaining tie portion, and the ease of opening the packaging bag were checked at the second perforations 23 and 24. The results are shown in Table 2.

[0073] [Table 2]

[0074] The remaining tie portions were evaluated as A if all ties remained before the second perforations 23 and 24 were torn, B if only some ties remained, and C if no ties remained. In addition, the openability was evaluated as A if the packaging bag 10 was very easy to open when the subject tore the second perforations 23 and 24, B if the packaging bag 10 could be opened, and C if the packaging bag 10 could not be opened.

[0075] As can be seen from Table 2, when the tie length at the second perforations 23 and 24 was 0.75 mm, both the tie remaining portion and the ease of opening were good. On the other hand, when the tie length was 0.5 mm, the tie remaining portion was poor, and when the tie length was 1.0 mm or 1.5 mm, the tie remaining portion was good but the ease of opening was poor.

[0076] The pairs of third perforations 30, 40 and 50, 60 are continuous with the ends 21A, 21B, 22A, 22B of the first perforations 21, 22. The pairs of third perforations 30, 40 and 50, 60 extend in directions away from the first perforations 21, 22. The distance D1 between the pairs of third perforations 30, 40 and 50, 60 in the second direction (Y direction) increases as they move away from the first perforations 21, 22.

[0077] The lengths of the cuts and ties in the third perforations 30, 40, 50, and 60 are arbitrary. The length of each cut in the third perforations 30, 40, 50, and 60 can be 1.0 mm to 5.0 mm, preferably 1.5 mm to 4.5 mm, and more preferably 2.5 mm to 3.5 mm. The length of each tie can be 0.6 mm to 2 mm, preferably 0.7 mm to 1.8 mm, and more preferably 0.75 mm to 1.5 mm.

[0078] The length of the tie, the remaining tie portion, and the ease of opening the packaging bag were checked at the third perforations 30, 40, 50, and 60. The results are shown in Table 2.

[0079] [Table 3]

[0080] The remaining ties were evaluated as A if all ties remained before the third perforations 30, 40 and 50, 60 were torn, B if some ties remained, and C if no ties remained. The openability was evaluated as A if the subject felt that the packaging bag 10 was very easy to open when the third perforations 30, 40 and 50, 60 were torn, B if the packaging bag 10 could be opened, and C if the packaging bag 10 could not be opened.

[0081] From Table 3, when the tie length at the third perforations 30, 40 and 50, 60 was 0.75 mm, both the tie remaining portion and the ease of opening were good. On the other hand, when the tie length was 0.5 mm, the tie remaining portion was poor, and when the tie length was 1.0 mm and 1.5 mm, the tie remaining portion was good but the ease of opening was poor.

[0082] As shown in Figure 3, the packaging bag 10 of this embodiment may have a second slit 25 that is continuous with the middle portions 21C, 22C of the first perforations 21, 22 and extends in the second direction (Y direction) between the first perforations 21, 22.

[0083] In the packaging bag 10 of this embodiment, the angles θ1, θ2, θ3, and θ4 between the first perforations 21, 22 and the third perforations 30, 40 and 50, 60 are preferably 85 degrees or more and 119 degrees or less, more preferably 90 degrees or more and 117 degrees or less, and more preferably 95 degrees or more and 115 degrees or less.

[0084] The sheet insertion and removal properties were checked for angles θ1, θ2, θ3, and θ4 between the first perforations 21, 22 and the third perforations 30, 40 and 50, 60. The results are shown in Table 4.

[0085] [Table 4]

[0086] Regarding sheet insertion, if the sheet was sandwiched between the first direction flap and the second direction flap described below, it was evaluated as ◯, and if it was not sandwiched, it was evaluated as ×. Regarding sheet removal, if the subject felt that it was easy to remove the first sheet from the removal opening, it was evaluated as ◯, and if the subject felt that it was difficult or impossible to remove the first sheet from the removal opening, it was evaluated as ×.

[0087] From Table 4, when the angles θ1, θ2, θ3, θ4 between the first perforations 21, 22 and the third perforations 30, 40 and 50, 60 were 95 degrees, 100 degrees, 105 degrees, 110 degrees, and 115 degrees, respectively, both the sheet insertion and the sheet removal were good. On the other hand, when the angles θ1, θ2, θ3, θ4 were 80 degrees, both the sheet insertion and the sheet removal were poor, and when the angles were 120 degrees and 130 degrees, the sheet insertion was good but the sheet removal was poor.

[0088] In the packaging bag 10 of this embodiment, as shown in Figure 5, the spacing D2 in the second direction (Y direction) between the third perforations 30, 40 and 50, 60 is preferably 25% or more and 50% or less of the length S1 in the second direction (Y direction) of the top surface 11 of the packaging bag 10, more preferably 27% or less and 48% or less, and even more preferably 29% or less and 45% or less.

[0089] In the packaging bag 10 of this embodiment, as shown in Figure 6, the shortest distance D3 between the ends 21A, 21B, 22A, 22B of the first perforations 21, 22, where the third perforations 30, 40 and 50, 60 are continuous, and the edge 11A in the first direction (X direction) of the top surface 11 of the packaging bag 10 is preferably 10% or more and 30% or less of the length L1 of the top surface 11 in the first direction (X direction), more preferably 12% or more and 28% or less, and even more preferably 15% or more and 27% or less.

[0090] The sheet removal efficiency was checked based on the shortest distance D3 between the ends 21A, 21B, 22A, and 22B of the first perforations 21 and 22 and the edge 11A in the first direction (X direction) of the top surface 11 of the packaging bag 10. The results are shown in Table 5.

[0091] [Table 5]

[0092] The ease of removing the sheets was evaluated as ◯ if the subject felt it was easy to remove the first sheet from the outlet, and as × if the subject felt it was difficult or impossible to remove the first sheet from the outlet.

[0093] From Table 5, when the shortest distance D3 between the ends 21A, 21B, 22A, 22B of the first perforations 21, 22 and the edge 11A in the first direction (X direction) of the top surface 11 of the packaging bag 10 was 20 mm, 25 mm, 30 mm, or 35 mm, the sheet removal property was good. On the other hand, when the shortest distance D3 was 15 mm or 40 mm, the sheet removal property was poor.

[0094] As shown in Figures 3 to 6, the packaging bag 10 of this embodiment has first slits 31, 41 and 51, 61 that form arc-shaped openings 31A, 41A and 51A, 61A at the ends 30A, 40A and 50A, 60A of the third perforations 30, 40 and 50, 60.

[0095] In this embodiment, the first slits 31, 41 and 51, 61 are curved inward along the first direction (X direction). The first slits 31, 41 and 51, 61 may be curved outward along the first direction (X direction). Alternatively, some of the first slits 31, 41 and 51, 61 may be curved inward along the first direction (X direction), and the remaining some may be curved outward along the first direction (X direction).

[0096] In the first slits 31, 41 and 51, 61, as shown in Fig. 7, the angle θ6 of the portion of the imaginary circle including the arc where the arc does not exist is preferably 60 degrees or more and 115 degrees or less, more preferably 67 degrees or more and 113 degrees or less, and even more preferably 75 degrees or more and 110 degrees or less. Note that the imaginary circle including the arc indicates the outline of the openings 31A, 41A and 51A, 61A, which are substantially circular in top view as shown in Fig. 7.

[0097] The tearing of the packaging bag was confirmed at an angle θ6 of a portion where no arc exists in an imaginary circle including the arcs of the first slits 31, 41 and 51, 61. The results are shown in Table 6.

[0098] [Table 6]

[0099] The ease of removing the sheets was evaluated as ◯ if the subject felt it was easy to remove the first sheet from the outlet, and as × if the subject felt it was difficult or impossible to remove the first sheet from the outlet.

[0100] From Table 6, when the angle θ6 of the portion of the imaginary circle including the arcs of the first slits 31, 41 and 51, 61 where no arc exists was 75 degrees or 100 degrees, the sheet removal was good. On the other hand, when the angle θ6 was 45 degrees, the sheet removal was poor.

[0101] The diameter of the imaginary circle including the arc is preferably 7 mm or less, more preferably 1 mm or more and 6 mm or less, and even more preferably 2 mm or more and 5 mm or less.

[0102] In this embodiment, a pair of first perforations 21, 22 extending in a first direction (X direction) of the packaging bag 10 are arranged at a predetermined interval S2 in a second direction (Y direction) perpendicular to the first direction (X direction), and a pair of second perforations 23, 24 extending in the second direction (Y direction) between the first perforations 21, 22 are continuous with the ends 21A, 21B, 22A, 22B of the first perforations 21, 22, so that the area R surrounded by the pair of first perforations 21, 22 and the pair of second perforations 23, 24 has a predetermined length L2 and a predetermined interval S2, as shown in Figure 3.

[0103] As a result, in this embodiment, even if the packaging bag 10 has almost no flexibility, the area R surrounded by the pair of first perforations 21, 22 and the pair of second perforations 23, 24 becomes easy to pinch, making it easier to open the packaging bag 10 via the first perforations 21, 22 and the second perforations 23, 24.

[0104] In this embodiment, a pair of third perforations 30, 40 and 50, 60 extend continuously from the ends 21A, 21B, 22A, 22B of the pair of first perforations 21, 22 extending in the first direction (X direction) and in a direction away from the first perforations 21, 22. As the distance from the first perforations 21, 22 increases, the distance D1 between the first perforations 21, 22 and the second perforations 23, 24 and When the third perforations 30, 40 and 50, 60 are torn, as shown in Figure 4, a pair of flaps F1, F2 are formed in the second direction (Y direction) surrounded by the first perforations 21, 22 and the third perforations 30, 40 and 50, 60, respectively, and a pair of flaps F3, F4 are formed in the first direction (X direction) surrounded by the second perforations 23, 24 and the pair of third perforations 30, 40 and 50, 60, respectively.

[0105] As a result, in this embodiment, the force applied to the removal port 20 (opening OP) when the sheet S is removed is buffered by the flaps F1 and F2 in the first direction (X direction) and the flaps F3 and F4 in the second direction (Y direction), making it easier to remove the sheet S even if the packaging bag 10 has almost no flexibility, making the removed sheet S less likely to tear, and making the packaging bag 10 less likely to tear when the sheet S is removed.

[0106] Furthermore, in this embodiment, when multiple sheets S are stacked alternately in a folded state (so-called pop-up stacking), after the first sheet S is removed, the second and subsequent sheets S are likely to be sandwiched between the flaps F1 and F2 facing in the first direction (X direction) and the flaps F3 and F4 facing in the second direction (Y direction). Therefore, in this embodiment, even if the packaging bag 10 has almost no flexibility, the sheets S are likely to be held at the take-out opening 20 (opening OP), and it is possible to prevent the sheets S from falling at the take-out opening 20 (opening OP).

[0107] In this embodiment, the packaging bag is made of 100% paper, so the amount of resin used in the packaging bag 10 can be reduced.

[0108] Furthermore, in this embodiment, packaging bag 10, which is made of 100% paper, has almost no flexibility, but as described above, region R surrounded by a pair of first perforations 21, 22 and a pair of second perforations 23, 24 has a predetermined length L2 and a predetermined interval S2, making packaging bag 10 easy to open. Furthermore, as described above, by forming pairs of flaps F1, F2 and F3, F4 in the first direction (X direction) and the second direction (Y direction), respectively, sheet S is easy to remove, the removed sheet S is less likely to tear, and packaging bag 10 is less likely to tear when sheet S is removed, preventing sheet S from falling.

[0109] In this embodiment, the first direction (X direction) of the packaging bag 10 is the CD direction of the base material that constitutes the packaging bag 10, and therefore the direction (X direction) in which the first perforations 21, 22 extend is the CD direction of the base material that constitutes the packaging bag 10. As a result, in this embodiment, the first perforations 21, 22 are formed in the CD direction, which makes it difficult for the base material that constitutes the packaging bag 10 to tear, and therefore it is possible to prevent the first perforations 21, 22 from unexpectedly tearing.

[0110] In this embodiment, a pair of side surfaces (end surfaces 15, 16) facing the first direction (X direction) of the packaging bag 10 are sealed with caramel packaging, so even if the amount of sheet S inside the packaging bag 10 decreases and space is created inside the packaging bag 10, the packaging bag 10 is less likely to be crushed in the vertical direction (Z direction).However, as described above, a pair of flaps F1, F2 and F3, F4 are formed in the first direction (X direction) and the second direction (Y direction), respectively, so that the sheet S can be prevented from falling.

[0111] In this embodiment, when the angle between the first perforations 21, 22 and the third perforations 30, 40 and 50, 60 is between 85 degrees and 119 degrees, the distance from the base ends P1, P2 of the flaps F1, F2 facing in the first direction (X direction) to the tip ends T1, T2 does not become too long, as shown in Fig. 4. Therefore, when stacked in a pop-up format, the second and subsequent sheets S are more likely to be sandwiched between the flaps F1, F2 facing in the first direction (X direction) and the flaps F3, F4 facing in the second direction (Y direction). Therefore, in this embodiment, it is possible to reliably prevent the sheets S from falling into the dispensing opening 20 (opening OP).

[0112] In this embodiment, the distance D2 in the second direction (Y direction) between the third perforations 30, 40 and 50, 60 is 25% to 50% of the length S1 in the second direction (Y direction) of the top surface 11 of the packaging bag 10, so that the distance from the base ends P3, P4 to the tip ends T3, T4 of the flaps F3, F4 facing in the second direction (Y direction) does not become too short, and therefore, when stacked in a pop-up style, the second and subsequent sheets S are more likely to be sandwiched between the flaps F1, F2 facing in the first direction (X direction) and the flaps F3, F4 facing in the second direction (Y direction). Therefore, in this embodiment, it is possible to reliably prevent the sheets S from falling into the dispensing opening 20 (opening OP).

[0113] In this embodiment, the shortest distance D3 between the ends 21A, 21B, 22A, and 22B of the first perforations 21 and 22, where the third perforations 30, 40 and 50, 60 are continuous, and the edge 11A in the first direction (X direction) of the top surface 11 of the packaging bag 10 is 10% to 30% of the length of the top surface 11 in the first direction (X direction). This prevents the shortest distance D3 between the ends 21A, 21B, 22A, and 22B of the first perforations 21 and 22 and the edge 11A in the first direction (X direction) of the top surface 11 from becoming too long, making it easier for the sheet S to be sandwiched between the flaps F1 and F2 facing in the first direction (X direction) and the flaps F3 and F4 facing in the second direction (Y direction). Therefore, in this embodiment, it is possible to reliably prevent the sheet S from falling into the dispensing opening 20 (opening OP).

[0114] In this embodiment, the ties of the third perforations 30, 40 and 50, 60 have a length of 0.6 mm or more and 2 mm or less, so that the third perforations 30, 40 and 50, 60 can be torn by the force applied to the dispensing opening 20 (opening OP) when the sheet S is taken out. Therefore, in this embodiment, it is not necessary to tear the third perforations 30, 40 and 50, 60 when opening the packaging bag 10. Furthermore, by providing ties of a length of 0.6 mm or more and 2 mm or less at the third perforations 30, 40 and 50, 60, it is possible to prevent the third perforations 30, 40 and 50, 60 from tearing unexpectedly.

[0115] In this embodiment, by providing first slits 31, 41 and 51, 61 that form arc-shaped openings 31A, 41A and 51A, 61A at the tips 30A, 40A and 50A, 60A of the third perforations 30, 40 and 50, 60, the tips of the slits S (tips 30A, 40A and 50A, 60A of the third perforations 30, 40 and 50, 60) formed after the third perforations 30, 40 and 50, 60 are torn open are less likely to tear. Therefore, in this embodiment, the sheet S is easy to remove, the removed sheet S is less likely to tear, the packaging bag is less likely to tear when the sheet S is removed, and a state can be maintained in which the sheet S is prevented from falling.

[0116] In this embodiment, the angle θ6 of the part of the imaginary circle including the arc where the arc does not exist is between 60 degrees and 119 degrees, thereby preventing the tips 30A, 40A and 50A, 60A of the third perforations 30, 40 and 50, 60 from turning over or tearing before the packaging bag 10 is used.

[0117] In this embodiment, the diameter of the arc is 7 mm or less, so that the tips 30A, 40A and 50A, 60A of the third perforations 30, 40 and 50, 60 can be reliably prevented from turning up or being torn.

[0118] 3 and 4 to 5, the second perforations 23 and 24 are curved in a direction away from the first perforations 21 and 22, which allows the force applied to the outlet 20 (opening OP) when the sheet S is taken out to be released in the first direction (X direction). Therefore, in this embodiment, both end portions (end portions 20A and 20B) of the outlet 20 (opening OP) in the first direction (X direction) are less likely to tear, and as a result, the tips T1 and T2 of the flaps F1 and F2 facing in the first direction (X direction) are less likely to tear.

[0119] In this embodiment, the length of the ties of the second perforations 23, 24 is 0.6 mm or more and 2 mm or less, thereby preventing both ends (ends 20A, 20B) of the outlet 20 (opening OP) in the first direction (X direction) from flipping up or tearing unexpectedly before opening the packaging bag 10.

[0120] In this embodiment, the second slit 25, which is continuous with the middle portions 21C, 22C of the first perforations 21, 22, extends in the second direction (Y direction) between the first perforations 21, 22, so that the packaging bag 10 can be opened through the second slit 25.

[0121] In this embodiment, by configuring a sheet packaging body 100 in which a sheet S is accommodated in the packaging bag 10 described above, the same effects as those of the packaging bag 10 described above can be obtained. That is, according to this embodiment, the packaging bag 10 is easy to open, the sheet S can be easily removed, the removed sheet S is less likely to tear, the packaging bag 10 is less likely to tear when the sheet S is removed, and the sheet S can be prevented from falling.

[0122] 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]

[0123] 100 sheet packaging S seat SL Sheet laminate 10 packaging bags 11 Top 11A Edge 12 Bottom 13, 14 Side 14 Side 15, 16 Wife face 16 Wife Face 20 Outlet 20A, 20B end R region OP Opening 21, 22 First perforation 21A, 21B, 22A, 22B ends 21C, 22C middle part 23, 24 Second perforation 25 Second slit 30, 40, 50, 60 3rd perforation B Slit 30A, 40A, 50A, 60A tip 31, 41, 51, 61 First slit 31A, 41A, 51A, 61A opening F1, F2, F3, F4 flaps P1, P2, P3, P4 proximal end T1, T2, T3, T4 tips

Claims

1. A packaging bag that contains a plurality of stacked sheets and has an opening for removing the sheets on a top surface, The outlet is a pair of first perforations extending in a first direction of the packaging bag and arranged at a predetermined interval in a second direction perpendicular to the first direction; a pair of second perforations extending in the second direction between the first perforations and continuous with the ends of the first perforations; A packaging bag having a pair of third perforations that are continuous with the ends of the first perforations and extend in a direction away from the first perforations, and whose spacing in the second direction increases as they move away from the first perforations.

2. The packaging bag according to claim 1, wherein the packaging bag is made of 100% paper.

3. The packaging bag according to claim 1 , wherein the first direction of the packaging bag is a CD direction of a base material constituting the packaging bag.

4. The packaging bag according to claim 1 , wherein a pair of side surfaces of the packaging bag that face each other in the first direction are sealed with a caramel wrap.

5. The packaging bag according to claim 1 , wherein the angle between the first perforation and the third perforation is equal to or greater than 85 degrees and equal to or less than 119 degrees.

6. The packaging bag according to claim 1 , wherein the spacing of the third perforations in the second direction is 25% to 50% of the length of the top surface in the second direction.

7. The packaging bag of claim 1, wherein the shortest distance between the end of the first perforation to which the third perforation is continuous and the edge of the top surface in the first direction is 10% or more and 30% or less of the length of the top surface in the first direction.

8. The packaging bag according to claim 1, wherein the length of the tie of the third perforation is 0.6 mm or more and 2 mm or less.

9. The packaging bag according to claim 1 , further comprising a first slit at a tip of the third perforation that forms an arc-shaped opening.

10. The packaging bag according to claim 9, wherein an angle of a portion of an imaginary circle including the arc where the arc does not exist is equal to or greater than 60 degrees and equal to or less than 119 degrees.

11. The packaging bag according to claim 9, wherein the diameter of an imaginary circle including the arc is 7 mm or less.

12. The packaging bag according to claim 1 , wherein the second perforation curves in a direction away from the first perforation.

13. The packaging bag according to claim 1, wherein the length of the tie of the second perforation is 0.6 mm or more and 2 mm or less.

14. The packaging bag according to claim 1 , further comprising a second slit that is continuous with a middle portion of the first perforation and extends between the first perforations in the second direction.

15. The packaging bag according to any one of claims 1 to 14; A sheet package comprising: a sheet contained in the packaging bag.

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