Sheet packaging

Abstract

To provide a sheet packaging that is easy to open, generates no waste when opened, allows for easy removal of the sheet, prevents the sheet from falling out, and prevents the packaging bag from lifting up. [Solution] The sheet packaging comprises a packaging bag for containing a plurality of stacked sheets, and an outlet formed on the top surface of the packaging bag, wherein the outlet has a first slit extending in a first direction of the packaging bag, and second slits that are continuous with both ends of the first slit and extend to one side in a second direction intersecting the first direction of the packaging bag, the first slit curves toward the one side in the second direction, the second slit curves toward the side away from the first slit in the first direction, the first slit is formed by perforations, and the plan view shape of the perforations is an arc shape without inflection points.

Description

Technical Field

[0001] The present disclosure relates to a sheet package.

Background Art

[0002] Hygienic thin paper such as tissue paper that is housed in a cardboard box called a carton is widely prevalent. On the other hand, carton-type hygienic thin paper has problems such as bulkiness during carrying and storage, disposal after use, environmental load, and cost. In recent years, demand for sheet packages in which sheets such as hygienic thin paper are housed in a flexible film packaging bag has been increasing.

[0003] For example, Patent Document 1 discloses a tissue paper package in which a slit-shaped take-out port is formed when a linear perforated portion formed on the upper surface of a film pack in which tissue paper is stored in a pop-up manner is torn. Patent Document 2 discloses a film package in which an elongated annular take-out port is formed when a perforation formed on the top surface of a film packaging bag in which tissue paper is folded and stored so as to be taken out in a pop-up manner is torn.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, conventional sheet packaging has perforations that form the opening, which are either straight or elongated ring-shaped, making it difficult to open. Furthermore, if the perforations are straight, the sheet may fall out or the packaging bag may lift up during use. Additionally, if the perforations are ring-shaped, waste is generated when opening the package.

[0006] The purpose of this disclosure is to provide a sheet packaging that is easy to open, generates no waste when opened, allows for easy removal of the sheet, prevents the sheet from falling out, and prevents the packaging bag from lifting up. [Means for solving the problem]

[0007] A first aspect of the present disclosure is a sheet packaging comprising a packaging bag for containing a plurality of stacked sheets, and an outlet formed on the top surface of the packaging bag, wherein the outlet has a first slit extending in a first direction of the packaging bag, and second slits continuous with both ends of the first slit and extending to one side in a second direction intersecting the first direction of the packaging bag, the first slit curves toward the one side in the second direction, the second slit curves toward the side away from the first slit in the first direction, the first slit is formed by perforations, and the plan view shape of the perforations is an arc shape without inflection points.

[0008] In the first embodiment, the perforations forming the first slit of the dispensing opening are arc-shaped with no inflection points in plan view, so there are no corners or irregularities on the perforations of the first slit. As a result, when a force to tear the perforations of the first slit is applied to the top surface of the packaging bag, a part of the perforations tears locally, and the entire perforation can be torn starting from that point. Therefore, according to the first embodiment, the dispensing opening of the sheet packaging is easy to open.

[0009] In the first embodiment, a pair of second slits, which curve away from the first slit in the first direction, are continuous with a first slit that curves toward one side in a second direction intersecting the first direction, but the pair of second slits are not continuous with each other. As a result, after the dispensing opening is opened, a portion of the top surface covering the dispensing opening is formed, but this portion of the top surface is not separated from the packaging bag. Therefore, it is possible to prevent waste from being generated when the dispensing opening is opened.

[0010] In the first embodiment, the dispensing opening has a first slit that curves to one side in the second direction, so that when the dispensing opening is opened, a portion of the top surface covering the dispensing opening easily curls upward (or bends) near the first slit. This makes the dispensing opening easier to open with a fingertip, and makes it easier to take out the first sheet or set of sheets contained in the packaging bag.

[0011] In the first embodiment, the dispensing opening has a second slit that extends to one side in the second direction such that it curves away from the first slit in the first direction, so that a part of the top surface covering the dispensing opening is more likely to curl upward (or bend) even near the second slit. As a result, when pulling a sheet out of the dispensing opening, the opening width of the dispensing opening is widened near both the first and second slits, allowing the sheet to be pulled out smoothly from the dispensing opening.

[0012] Furthermore, in the first embodiment, this configuration prevents sheets from getting stuck at both ends of the dispensing opening or the dispensing opening from tearing when sheets are taken out. As a result, even when the number of sheets stored decreases, the sheets being pulled out are less likely to get caught in the dispensing opening, thus preventing the packaging bag from lifting up (hereinafter referred to as "packaging bag lifting").

[0013] Furthermore, in the first embodiment, the dispensing opening has a flap formed along the curved first slit and a part of the top surface that covers the dispensing opening, and the sheet is held between the part of the top surface that covers the dispensing opening and the flap formed along the first slit, so that the sheet does not fall into the packaging bag (hereinafter referred to as "sheet falling").

[0014] Furthermore, in the first embodiment, the sheet is supported between a portion of the top surface covering the dispensing opening and a flap formed along the first slit, making it less likely for the sheet held in the dispensing opening to fall over. This prevents the sheet from coming into contact with the top surface, allowing for hygienic use of the sheet.

[0015] A second aspect of the present disclosure is the sheet packaging according to the first aspect, wherein the plan view shape of the perforations is arc-shaped. In the second aspect, because the plan view shape of the perforations forming the first slit of the dispensing opening is arc-shaped, the force that tears the perforations of the first slit is easily transmitted to the entire perforation. Therefore, according to the second aspect, opening the dispensing opening is even easier.

[0016] A third aspect of the present disclosure is a sheet packaging according to the first or second aspect, wherein the tie-cut ratio of the perforations is 0.27 or greater. In the third aspect, the tie-cut ratio of the perforations forming the first slit of the dispensing opening is 0.27 or greater, which prevents the perforations forming the first slit from unexpectedly tearing before use of the sheet packaging (e.g., during transport, storage, etc.).

[0017] A fourth aspect of the present disclosure is a sheet packaging according to any one of the first to third aspects, wherein the plan view shape of the second slit is an arc shape without inflection points. In the fourth aspect, because the second slit of the dispensing opening is an arc shape without inflection points in plan view, there are no corners or changes in unevenness on the second slit of the dispensing opening.

[0018] This reduces the frictional force on the sheet as it passes through both ends of the outlet. Therefore, according to the fourth embodiment, the sheet can be removed from the outlet more smoothly.

[0019] A fifth aspect of the present disclosure is the sheet package according to the fourth aspect, wherein the second slit has an arcuate shape in plan view. In the fifth aspect, since the shape of the second slit of the take-out port in plan view is arcuate, the frictional force on the sheet passing through both end portions of the take-out port can be further reduced. Therefore, according to the fourth aspect, the sheet can be taken out more smoothly from the take-out port.

[0020] A sixth aspect of the present disclosure is the sheet package according to any one of the first to fifth aspects, wherein a first tie is formed at a position of the second slit where the take-out port has a maximum length in the first direction. In the sixth aspect, in the second slit of the take-out port, the presence of the tie at the position where the take-out port has the maximum length in the first direction makes the second slit less likely to turn up.

[0021] In the sixth aspect, with such a configuration, it is possible to prevent dust from entering the packaging bag from the end of the take-out port before use of the sheet package (for example, during production, at the time of sale, etc.). In addition, it is possible to prevent the perforations forming the first slit continuous with the second slit from being unexpectedly torn before use of the sheet package (for example, during transportation, during storage, etc.).

[0022] A seventh aspect of the present disclosure is the sheet package according to the sixth aspect, wherein a second tie is provided at a position of the second slit between the first tie and an end portion of the first slit. In the seventh aspect, in the second slit of the take-out port, at a position between the tie formed at the position where the take-out port has the maximum length in the first direction and the end portion of the first slit continuous with the second slit, the additional presence of the tie makes the second slit even less likely to turn up.

[0023] Further, when forming the take-out port, if the perforations of the first slit are torn, the momentum can cause the second tie on the second slit to tear, and further cause the first tie on the second slit to tear. Therefore, in the seventh aspect, even when the ties are provided on the second slit, the take-out port can be easily opened.

[0024] An eighth aspect of the present disclosure is a packaging bag that accommodates a plurality of stacked sheets and has an outlet extending in a first direction formed on the top surface, wherein the outlet includes a first slit extending in the first direction, and second slits that are continuous with both end portions of the first slit respectively and extend toward one side in a second direction intersecting the first direction of the packaging bag, the first slit is curved toward the one side in the second direction, the second slits are curved toward the side away from the first slit in the first direction, the first slit is formed by a perforation, and the planar view shape of the perforation is an arc shape with no inflection point.

[0025] In the eighth aspect, the perforation forming the first slit of the outlet has an arc shape with no inflection point in a planar view, so that no corner portion or uneven change exists on the perforation of the first slit. Accordingly, when a force for tearing the perforation of the first slit is applied to the top surface of the packaging bag, a part of the perforation is locally torn, and the entire perforation can be torn starting from that part. Therefore, according to the eighth aspect, the outlet of the packaging bag can be easily opened.

[0026] In the eighth aspect, a pair of second slits curved toward the side away from the first slit in the first direction are continuous with the first slit curved toward one side in the second direction intersecting the first direction, and the pair of second slits are not continuous with each other. Thereby, after the outlet is opened, a part of the top surface covering the outlet is formed, and this part of the top surface is not separated from the packaging bag. Therefore, generation of waste when opening the outlet can be prevented.

[0027] In the eighth aspect, the outlet has the first slit curved toward one side in the second direction, so that when opening the outlet, the part of the top surface covering the outlet is easily turned up (or easily deflected) upward in the vicinity of the first slit. This makes the outlet easy to open with a fingertip, and facilitates taking out the first sheet or the first set of sheets accommodated in the packaging bag.

[0028] In the eighth embodiment, the dispensing opening has a second slit that extends to one side in the second direction such that it curves away from the first slit in the first direction, so that a portion of the top surface covering the dispensing opening is more likely to curl upward (or bend) even near the second slit. As a result, when pulling a sheet out of the dispensing opening, the opening width of the dispensing opening is widened near both the first and second slits, allowing the sheet to be pulled out smoothly from the dispensing opening.

[0029] Furthermore, in the eighth embodiment, this configuration prevents sheets from getting stuck at both ends of the dispensing opening or the dispensing opening from tearing when a sheet is removed. As a result, even when the number of sheets stored decreases, the sheets being pulled out are less likely to get caught in the dispensing opening, thus preventing the packaging bag from lifting up (hereinafter referred to as "packaging bag lifting").

[0030] Furthermore, in the eighth embodiment, the dispensing opening has a flap formed along the curved first slit and a part of the top surface that covers the dispensing opening, and the sheet is held between the part of the top surface that covers the dispensing opening and the flap formed along the first slit, so that the sheet does not fall into the packaging bag (hereinafter referred to as "sheet falling").

[0031] Furthermore, in the eighth embodiment, the sheet is supported between a portion of the top surface covering the dispensing opening and a flap formed along the first slit, making it less likely for the sheet held in the dispensing opening to fall over. This prevents the sheet from coming into contact with the top surface, allowing for hygienic use of the sheet. [Effects of the Invention]

[0032] According to one aspect of this disclosure, it is possible to provide a sheet packaging that is easy to open, does not generate waste when opened, allows for easy removal of the sheet, prevents the sheet from falling out, and prevents the packaging bag from lifting up. [Brief explanation of the drawing]

[0033] [Figure 1] This is a perspective view showing a sheet packaging body of an embodiment. [Figure 2] This is a view of the sheet packaging of the embodiment from the top. [Figure 3] This figure shows the dispensing opening of the sheet packaging body of the embodiment. [Figure 4] This is a magnified view of the end of the dispensing opening of the sheet packaging body of the embodiment. [Figure 5] This is a diagram showing the opening of the sheet packaging of the embodiment. [Figure 6] This figure shows the usage state of the sheet packaging according to the embodiment. [Modes for carrying out the invention]

[0034] Embodiments of this disclosure will be described in detail with reference to the drawings. In the following description, parts common to each figure may be denoted by the same reference numeral and their description may be omitted. Also, for ease of understanding, the scale of each component in each drawing may differ from that of the actual components.

[0035] In this specification, the directions in the figures are described using a three-dimensional Cartesian coordinate system with three axial directions (X, Y, and Z). In each figure, the X direction is the first direction of the sheet packaging (left-right direction or the longitudinal direction of the sheet), the Y direction is the second direction of the sheet packaging (front-back direction or the short direction of the sheet packaging), and the Z direction is the up-down direction (the height direction of the sheet packaging).

[0036] Furthermore, in this specification, deviations in each direction are permitted to the extent that they do not impair the function and effect of the embodiment. Note that orthogonal and rectangular parallelepipeds may include substantially orthogonal and substantially rectangular parallelepipeds.

[0037] Figure 1 is a perspective view showing the sheet packaging of the embodiment. Figure 2 is a view of the sheet packaging of the embodiment from the top. Figure 3 is a view showing the dispensing opening of the sheet packaging of the embodiment. Figure 4 is a magnified view of the end of the dispensing opening of the sheet packaging of the embodiment. Figure 5 is a view of the sheet packaging of the embodiment with the dispensing opening opened. Figure 6 is a view showing the sheet packaging of the embodiment in use.

[0038] <Sheet packaging> As shown in Figure 1, the sheet packaging 100 of this embodiment has a packaging bag 10 and an opening 20 formed in the packaging bag 10.

[0039] <Packaging bag> The packaging bag 10 contains multiple sheets S.

[0040] The sheets S are contained in the packaging bag 10 as a laminate SL, which is made up of multiple sheets S stacked together. The laminate SL of sheets S is contained in the packaging bag 10 such that the stacking direction SD of the sheets S is in the height direction (Z direction). As shown in Figures 1 and 6, the laminate SL of sheets S can be pulled out one set at a time through an opening 20 (opening OP) formed in the packaging bag 10.

[0041] The laminated sheet S SL is not limited to simply stacking multiple sheets S; each sheet S may be stacked in a folded state, or it may be a so-called pop-up type laminated sheet in which each sheet S is stacked alternately in a folded state. It is preferable that the laminated sheet S SL be a pop-up type laminated sheet that allows for the pulling out of one sheet S at a time.

[0042] Furthermore, the dimensions of the laminated sheet S SL can be such that the length in the longitudinal direction (X direction) of the sheet packaging 100 is approximately 80 to 250 mm, the length in the depth direction (Y direction) perpendicular to the longitudinal direction (X direction) of the sheet packaging 100 when viewed from above is approximately 50 to 130 mm, and the height direction (Z direction) is approximately 30 to 1000 mm. Such a laminate of thin paper can be manufactured, for example, by a rotary type or multi-stand type interfolder.

[0043] The form of the sheet S is not particularly limited and can be applied to sanitary tissue paper such as tissue paper, paper towels, toilet paper, and kitchen paper. These sanitary tissue papers also include sanitary tissue paper containing moisturizing ingredients (e.g., lotion tissue). Furthermore, the use of the sheet S is not particularly limited and can be applied to industrial, household, or portable use. Among these, the sheet packaging 100 of this embodiment is preferably used for household tissue paper.

[0044] The number of plies in sheet S is not particularly limited, but can be one or more, preferably one ply (single layer), and more preferably two plies (two layers). The shape of sheet S is also not particularly limited, but for example, it is preferable that the contour shape of a two-ply sheet is rectangular when folded.

[0045] The material of the sheet S is not particularly limited and may be, for example, paper, nonwoven fabric, or cloth, and preferably tissue paper. When the sheet is tissue paper, the pulp composition may be any known composition for tissue paper. The pulp blending ratio may be, for example, 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0046] Furthermore, the basis weight of sheet S is not particularly limited, but depending on the number of plies, it is 5 g / m² in the case of paper. 2 More than 80g / m 2 For nonwoven fabrics, the following is 20g / m². 2 More than 100g / m 2The following are preferred. The basis weight will be measured in accordance with the provisions of JIS P 8124 (2011).

[0047] Furthermore, the thickness of the sheet S is not particularly limited, and the paper thickness measured under the conditions of JIS P 8111 (1998) can be used. For example, if the sheet is tissue paper, the paper thickness of the tissue paper can be 50 μm or more and 500 μm or less per ply (or 2 plies in the case of 2 plies), and preferably 60 μm or more and 330 μm or less.

[0048] Furthermore, the paper sheets that make up sheet S may be embossed. Such embossing can be achieved by pressing an emboss (not shown) onto both ends of a paper sheet using a known contact embossing or edge embossing method and laminating multiple paper sheets; by inserting a pin (not shown) into a paper sheet using a known pin embossing method to form a pin emboss on one side of the paper sheet; or by heating and melting a water-soluble adhesive (such as starch) to bond the laminated paper sheets (not shown) and form an emboss using a known embossing method.

[0049] The packaging bag 10 has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, a side surface 15, and a side surface 16. In the packaging bag 10, as shown in Figure 1, the top surface 11 and the bottom surface 12 face each other in the vertical direction (Z direction), the front surface 13 and the back surface 14 face each other in the front-to-back direction (Y direction), and the side surface 15 and the side surface 16 face each other in the left-to-right direction (X direction). Also, the side surface 15 and the side surface 16 are continuous with any of the top surface 11, the bottom surface 12, the front surface 13, and the back surface 14. In this disclosure, the packaging bag 10 has a rectangular parallelepiped shape when the sheet laminate SL is contained within it.

[0050] The material of the packaging bag 10 is not particularly limited and can include resin, paper, or a laminate of resin and paper, but resin is preferred in that it imparts flexibility to the packaging bag 10. The resin that constitutes the packaging bag 10 is not particularly limited and can include, for example, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), and polyamide (PA). As for polyethylene, high-density polyethylene, low-density polyethylene, etc. can be used.

[0051] Among these materials, polyethylene, polypropylene, and polyethylene terephthalate are preferred due to their flexibility, ease of handling, high sealing performance when heat-sealed, and low cost. Polyethylene is also preferred because it is odorless, has excellent water and chemical resistance, and can be mass-produced at low cost. Polypropylene is also preferred from the viewpoint of being robust, easy to mold, producing good color when printed, and being able to give gloss.

[0052] Furthermore, the material used to form the packaging bag 10 can be a biodegradable material (such as a biodegradable plastic like polylactic acid) or a biomass material (such as a biomass film, which is a renewable, biologically derived organic resource excluding fossil resources).

[0053] The form of the resin forming the packaging bag 10 is not particularly limited and may be a single-layer film formed by forming the above-mentioned resin in a single layer, a laminated 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 by mixing two or more of the above-mentioned resins.

[0054] The thickness of the resin forming the packaging bag 10 is not particularly limited, and is, for example, 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 resin thickness 20 μm or more, sufficient strength can be ensured for the packaging bag 10 that contains the sheet S. Furthermore, by making the resin thickness 100 μm or less, flexibility and lightness of the packaging bag 10 can be ensured, and costs can be reduced.

[0055] Furthermore, the packaging method of the packaging bag 10 is not particularly limited. In this embodiment, for example, packaging in which both ends or one end of a tubular resin film folded in a gusset shape are sealed (pillow packaging), packaging in which both ends of a tubular resin film are folded and sealed (caramel packaging), packaging in which a heat-shrinkable resin film is heated and adhered to the packaged object (shrink packaging), or packaging that combines these can be used. In this disclosure, both sides 15 and 16 of the packaging bag 10 are formed by sealed portions 30 and 40 sealed with caramel packaging (see Figure 1).

[0056] <Outlet> The dispensing opening 20 is formed on the top surface 11 of the packaging bag 10. The dispensing opening 20 is positioned approximately in the center of the top surface 11 of the packaging bag 10 in the longitudinal direction (X direction) of the sheet packaging body 100 and extends in the first direction (X direction). In this embodiment, the first direction (X direction) in which the dispensing opening 20 extends corresponds to the longitudinal direction (X direction) of the sheet packaging body 100.

[0057] The outlet 20 has a first slit 21 and second slits 22 and 23.

[0058] The first slit 21 extends in a first direction (X direction) of the packaging bag 10. In this specification, the first direction (X direction) refers to a direction along a predetermined one direction on the top surface 11 of the packaging bag 10. In this disclosure, it refers to the longitudinal direction (X direction) of the rectangular parallelepiped constituting the packaging bag 10.

[0059] Furthermore, the first slit 21 curves to one side in a second direction (Y direction) that intersects with the first direction (X direction) of the packaging bag 10. In this specification, the second direction (Y direction) that intersects with the first direction (X direction) refers to a direction that is aligned with a predetermined direction on the top surface 11 of the packaging bag 10 and a direction that intersects with a brace. In this disclosure, the second direction (Y direction) refers to a direction perpendicular to the first direction (X direction) of the packaging bag 10.

[0060] Furthermore, one side in the second direction (Y direction) corresponds to the front 13 side of the packaging bag 10. In this specification, "curved" means bending in a convex manner.

[0061] The first slit 21 is formed by perforations M1 (see Figure 3). In this specification, perforations are intermittent cutting lines (cutting lines) in which cuts and ties (uncut portions between two cuts) are arranged alternately, and when a tie breaks, the adjacent cuts become continuous cuts.

[0062] In perforation M1, the length of cut C1 and the length of tie T1 are not limited. The length of each cut C1 can be 1.0 mm or more and 5.0 mm or less, preferably 1.5 mm or more and 4.5 mm or less, and more preferably 2.5 mm or more and 4.0 mm or less. The length of each tie T1 can be 0.3 mm or more and 5.0 mm or less, preferably 0.4 mm or more and 2.0 mm or less, and more preferably 0.5 mm or more and 1.5 mm or less.

[0063] In the perforation M1, the ratio of the length of tie T1 to the length of cut C1 (hereinafter referred to as the tie-cut ratio) is preferably 0.27 or more, more preferably 0.275 or more, and even more preferably 0.28 or more. The upper limit of the tie-cut ratio is not particularly limited and should be within the range in which the perforation M1 can be opened, for example, 0.5 or less, preferably 0.45 or less, and more preferably 0.4 or less.

[0064] The plan view shape of perforation M1 is an arc without inflection points. In this specification, "without inflection points" means that in plan view, the curve has no concave or concave surfaces, and remains either convex or concave. An arc means that it is curved in an arc shape. As long as an arc without inflection points is a curve that bends in an arc shape, either convex or concave, its radius of curvature (R) may be constant or variable.

[0065] In this disclosure, the plan view shape of the perforation M1 is preferably arc-shaped. An arc shape refers to the shape of a part of the circumference. For a perforation with an arc shape in plan view, the radius of curvature (R) is constant.

[0066] The second slits 22 and 23 are continuous with both ends 21A and 21B of the first slit 21, respectively. In this disclosure, as shown in Figure 3, the end 22A of the second slit 22 is continuous with the end 21A of the first slit 21, and the end 23A of the second slit 23 is continuous with the end 21B of the first slit 21.

[0067] The second slits 22 and 23 extend to one side of the second direction (Y direction) intersecting the first direction (X direction) of the packaging bag 10. In this disclosure, as shown in Figure 3, the end 22B of the second slit 22 is located away from the end 21A of the first slit 21 in the second direction (Y direction), and the end 23B of the second slit 23 is located away from the end 21B of the first slit 21 in the second direction (Y direction).

[0068] Furthermore, the second slits 22 and 23 curve away from the first slit 21 in the first direction (X direction). In this specification, curving away from the first slit in the first direction (X direction) means that the second slit is bent so as to be convex toward the ends of the first slit in the first direction (X direction). In this disclosure, the second slit 22 curves away from the end 21A of the first slit 21 in the first direction (X direction), and the second slit 23 curves away from the end 21B of the first slit 21 in the first direction (X direction).

[0069] The plan view shape of the second slits 22 and 23 is not particularly limited, but is more preferably an arc shape without inflection points, and more preferably a circular arc shape.

[0070] Furthermore, if the plan view shape of the second slits 22 and 23 is arc-shaped, the radius of curvature (R) of the second slits 22 and 23 is preferably 3 mm or more and 20 mm or less, more preferably 5 mm or more and 15 mm or less, and even more preferably 8 mm or more and 12 mm or less.

[0071] Preferably, the second slits 22 and 23 have a first tie T21 (T2) formed at a position where the outlet 20 has its maximum length in the first direction (X direction). In this disclosure, the second slit 22 is composed of perforations M2, and the portion where the first tie T21 (T2) is not formed corresponds to a cut C2. Similarly, the second slit 23 is composed of perforations M3, and the portion where the first tie T2 is not formed corresponds to a cut C2 (see Figures 3 and 4).

[0072] Here, the position where the outlet 20 has its maximum length in the first direction (X direction) is the position on the second slits 22 and 23 where the length of the opening OP of the outlet 20 in the first direction (X direction) is the longest. In this disclosure, as shown in Figure 4, this corresponds to a position that is 0° with respect to the imaginary line VC passing through the position where the outlet 20 has its maximum length in the first direction (X direction) of the second slits 22 and 23.

[0073] In the second slits 22 and 23, it is preferable that a second tie T22(T2) is further provided between the first tie T21 and the ends 21A and 21B of the first slit 21. The portions of the second slits 22 and 23 where the first tie T21(T2) is not formed are composed of cuts C2 (cuts C21, C22, and C23).

[0074] Here, the position between the first tie T21 and the ends 21A and 21B of the first slit 21 corresponds to a position at θ° with respect to a virtual line VC that passes through the position where the outlet 20 has its maximum length in the first direction (X direction) of the second slits 22 and 23. In this disclosure, θ° is preferably 35° or more and 55° or less, more preferably 40° or more and 50° or less, and even more preferably 43° or more and 47° or less.

[0075] In the sheet packaging 100, the dimensions (length L2) of the dispensing opening 20 in the first direction (X direction) can be arbitrarily determined according to the capacity of the packaging bag 10 and the dimensions of the sheet S. For example, the length L2 of the dispensing opening 20 can be 100% or less of the length L1 of the packaging bag 10 in which the sheet S is contained, preferably 5% to 80%, and more preferably 10% to 75% (see Figure 2).

[0076] Furthermore, at the dispensing opening 20, the top 21C of the first slit 21 is the part where the distance D1 from the edge 11A of the top surface 11 located on one side in the second direction (Y direction) (the side of the front 13 of the packaging bag 10) to the first slit 21 along the second direction (Y direction) is shortest (the part where the shortest distance D2 is from the edge 11A of the top surface 11) (see Figure 2).

[0077] Furthermore, at the dispensing opening 20, it is preferable that the shortest distance D3 from the edge 11A of the top surface 11 located on the other side in the second direction (Y direction) (the front surface 13 side of the packaging bag 10) to the ends 22B and 23B of the second slits 22 and 23 along the second direction (Y direction) is shorter than the shortest distance D2 from the edge 11A of the top surface 11 to the top 21C of the first slit 21 (see Figure 2).

[0078] In the sheet packaging 100, the width W2 of the region where the first slit 21 exists in the second direction (Y direction) can be 1% to 25% of the width W1 of the top surface 11 of the packaging bag 10, preferably 3% to 20%, and more preferably 5% to 15% (see Figure 2). Also, in the second direction (Y direction), the width W3 of the region where the second slits 22 and 23 curve or extend can be 5% to 35% of the width W1 of the top surface 11 of the packaging bag 10, preferably 10% to 30%, and more preferably 15% to 25% (see Figure 2).

[0079] Furthermore, with respect to the shortest distance D2 from the edge 11A of the top surface 11 to the top 21C of the first slit 21, the shortest distance D3 from the edge 11A of the top surface 11 to the ends 22B and 23B of the second slits 22 and 23 along the second direction (Y direction) can be 60% to 95%, preferably 75% to 95%, and more preferably 80% to 90%.

[0080] In the sheet packaging 100, when the first slit 21 and the second slits 22 and 23 rupture at the dispensing opening 20, a flap F1 is formed, surrounded by the first slit 21, the second slits 22 and 23, and the first base end (base end B1) extending in the first direction (X direction) (see Figure 5). The flap F1 has a straight base end B1 that connects to the top surface 11 on one side in the second direction (Y direction) (the front surface 13 side of the packaging bag 10), and a concave tip A1 that becomes a free end on the inside of the dispensing opening 20 (see Figure 5). The flap F1 is a portion formed by a part 11B of the top surface 11. The base end B1 is the portion shown by the dashed line in Figure 5.

[0081] Here, the flap is formed on the top surface 11 of the packaging bag 10 and is a part of the packaging bag 10 that bends (or deforms) due to the frictional force (or resistance force) when the sheet S is pulled out from the opening 20. The base end indicates the end of the flap that is the starting point for the flap to bend (or deform).

[0082] Furthermore, in the sheet packaging 100, a flap F2 is formed, enclosed by the first slit 21 and a second base end (base end B2) extending in the first direction (X direction). The flap F2 has a straight base end B2 that connects to the top surface 11 on the other side in the second direction (Y direction) (the back surface 14 side of the packaging bag 10), and a convex tip A2 that becomes a free end inside the dispensing opening 20 (see Figure 5). Note that the base end B2 is the part shown by the dashed line in Figure 5.

[0083] Furthermore, in the sheet packaging 100, a flap F3 is formed, surrounded by the second slits 22 and 23 and a third base end (base end B3) extending in the second direction (Y direction). The flap F3 is made up of both ends 21B and 21C of the first slit 21 and has a straight base end B3 extending from the ends 22A and 23A of the second slits 22 and 23 along the ends 22B and 23B, and an arc-shaped edge E that becomes a free end inside the dispensing opening 20. The base end B3 is the part shown by the dashed line in Figure 5.

[0084] In the sheet packaging 100, the area of ​​the opening OP of the dispensing outlet 20 is not particularly limited as an area ratio to the area of ​​the top surface 11 of the packaging bag 10, but is preferably 3% to 30%, more preferably 4% to 25%, and even more preferably 5% to 20%.

[0085] As described above, in the sheet packaging 100 according to this disclosure, the perforations M1 forming the first slit 21 of the dispensing opening 20 are arc-shaped with no inflection points in plan view, so there are no corners or irregularities on the perforations M1 of the first slit 21. As a result, when a force that tears the perforations M1 of the first slit 21 is applied to the top surface 11 of the packaging bag 10, a part of the perforations M1 tears locally, and the entire perforations M1 can be torn starting from that point. Therefore, the dispensing opening 20 of the sheet packaging 100 is easy to open.

[0086] In the sheet packaging 100, a pair of second slits 22 and 23 are continuous with a first slit 21 that curves toward one side (the front 13 side of the packaging bag 10) in the second direction (Y direction) intersecting the first direction (X direction), and the second slits 22 and 23 are continuous with the first slit 21 in the first direction (X direction), but the pair of second slits 22 and 23 are not continuous with each other. As a result, after opening the dispensing opening 20, a part 11B of the top surface 11 that covers the dispensing opening 20 is formed, but this part 11B of the top surface 11 is not separated from the packaging bag 10. Therefore, it is possible to prevent waste from being generated when opening the dispensing opening 20.

[0087] In the sheet packaging 100, the dispensing opening 20 has a first slit 21 that curves toward one side in the second direction (Y direction) (towards the front 13 side of the packaging bag 10). This makes it easier for a portion 11B of the top surface 11 covering the dispensing opening 20 to curl upward (or bend) near the first slit 21 when the dispensing opening 20 is opened. As a result, the dispensing opening 20 is easier to open with a fingertip, making it easier to take out the first sheet or set of sheets S contained in the packaging bag 10.

[0088] In the sheet packaging 100, the dispensing opening 20 has second slits 22 and 23 that extend in one direction (Y direction) (towards the front 13 side of the packaging bag 10) in the second direction (Y direction) such that the opening 20 curves away from the first direction (X direction) from the first slit 21. As a result, a part 11B of the top surface 11 that covers the dispensing opening 20 is more likely to curl upward (or bend) even near the second slits 22 and 23. This allows the opening width of the dispensing opening 20 to widen near both the first slit 21 and the second slits 22 and 23 when pulling out the sheet S from the dispensing opening 20, enabling the sheet S to be smoothly removed from the dispensing opening 20.

[0089] In the sheet packaging 100, this configuration prevents the sheet S from getting stuck in both ends of the dispensing opening 20 (corresponding to the second slits 22 and 23) or the dispensing opening 20 from tearing when the sheet S is removed. Therefore, even when the amount of sheets S stored decreases, the sheets S being pulled out are less likely to get caught in the dispensing opening 20, thus preventing the packaging bag 10 from lifting up.

[0090] Furthermore, in the sheet packaging 100, the dispensing opening 20 has a flap F2 formed along the curved first slit 21 and a part 11B of the top surface 11 that covers the dispensing opening 20. Because the sheet S is held between the part 11B of the top surface 11 that covers the dispensing opening 20 and the flap F2 formed along the first slit 21, the weight of the sheet S held in the dispensing opening 20 prevents the sheet S from falling into the packaging bag 10 (sheet S falling in).

[0091] Furthermore, in the sheet packaging 100, the sheet S is supported between a part 11B (corresponding to the flap F1) of the top surface 11 that covers the dispensing opening 20 and the flap F2 formed along the first slit 21. This makes it less likely for the sheet S held in the dispensing opening 20 to fall over. As a result, the sheet S can be prevented from coming into contact with the top surface 11, allowing for hygienic use of the sheet S.

[0092] In the sheet packaging 100 according to this disclosure, as described above, the plan view shape of the perforation M1 forming the first slit 21 of the dispensing opening 20 is arc-shaped, so the force that tears the perforation M1 of the first slit 21 is easily transmitted to the entire perforation M1. Therefore, opening the dispensing opening 20 is even easier in the sheet packaging 100.

[0093] As described above, in the sheet packaging 100 according to this disclosure, the tie-cut ratio of the perforations M1 forming the first slit 21 of the dispensing opening 20 is 0.27 or more, which prevents the perforations M1 forming the first slit 21 from unexpectedly tearing before use of the sheet packaging 100 (for example, during transport, storage, etc.).

[0094] As described above, in the sheet packaging 100 according to this disclosure, the second slits 22 and 23 of the dispensing opening 20 are arc-shaped with no inflection points in plan view, so there are no corners or irregularities on the second slits 22 and 23 of the dispensing opening 20. This reduces the frictional force on the sheet S passing through both ends of the dispensing opening 20 (the parts corresponding to the second slits 22 and 23). Therefore, the sheet S can be removed more smoothly from the dispensing opening 20 in the sheet packaging 100.

[0095] As described above, in the sheet packaging 100 according to this disclosure, the plan view shape of the second slits 22 and 23 of the dispensing opening 20 is arc-shaped, which further reduces the frictional force on the sheet S passing through both ends of the dispensing opening 20 (the parts corresponding to the second slits 22 and 23). Therefore, the sheet S can be removed from the dispensing opening 20 even more smoothly in the sheet packaging 100.

[0096] In the sheet packaging 100 according to this disclosure, as described above, the tie T21 is located at the position where the second slits 22 and 23 of the dispensing opening 20 have their maximum length in the first direction (the length L2 of the dispensing opening 20 is the maximum), making it difficult for the second slits 22 and 23 to curl up.

[0097] With this configuration, the sheet packaging 100 can prevent dust from entering the packaging bag 10 from the end of the dispensing opening 20 (the part corresponding to the second slits 22 and 23) before use of the sheet packaging 100 (for example, during manufacturing, sales, etc.). In addition, the perforations M1 that form the first slit 21, which is continuous with the second slits 22 and 23, can be prevented from unexpectedly tearing before use of the sheet packaging 100 (for example, during transportation, storage, etc.).

[0098] In the sheet packaging 100 according to this disclosure, as described above, in the second slits 22 and 23 of the outlet 20, there is a tie T21 (T2) formed at a position where the outlet 20 is at its maximum length (the length L2 of the outlet 20 is at its maximum) in the first direction (X direction), and there is an additional tie T22 (T2) between the end parts 21A and 21B of the first slit 21 where the second slits 22 and 23 are continuous, which makes the second slits 22 and 23 even less likely to curl up.

[0099] Furthermore, when forming the dispensing opening 20, if the perforation M1 of the first slit 21 rips open, the second tie T22(T2) on the second slits 22 and 23 will rip open due to the resulting impact, and then the first tie T21(T2) on the second slits 22 and 23 will also rip open. Therefore, even when ties T2 are provided on the second slits 22 and 23 of the sheet packaging 100, the dispensing opening 20 can be easily opened.

[0100] As described above, in the packaging bag 10 according to this disclosure, the perforation M1 forming the first slit 21 of the dispensing opening 20 is an arc shape without inflection points in plan view, so there are no corners or changes in unevenness on the perforation M1 of the first slit 21. As a result, when a force that tears the perforation M1 of the first slit 21 is applied to the top surface 11 of the packaging bag 10, a part of the perforation M1 tears locally, and the entire perforation M1 can be torn starting from that point. Therefore, the dispensing opening 20 of the packaging bag 10 is easy to open.

[0101] In the packaging bag 10, a pair of second slits 22 and 23 are continuous with a first slit 21 that curves toward one side in the second direction (Y direction) intersecting the first direction (X direction), and these second slits 22 and 23 curve toward the side away from the first slit 21 in the first direction (X direction), but the pair of second slits 22 and 23 are not continuous with each other. As a result, after opening the dispensing opening 20, a part 11B of the top surface 11 that covers the dispensing opening 20 is formed, but this part 11B of the top surface 11 is not separated from the packaging bag 10. Therefore, it is possible to prevent waste from being generated when opening the dispensing opening 20.

[0102] In the packaging bag 10, the dispensing opening 20 has a first slit 21 that curves toward one side in the second direction (Y direction) (towards the front 13 side of the packaging bag 10). This makes it easier for a portion 11B of the top surface 11 covering the dispensing opening 20 (the portion corresponding to the flap F1) to curl upward (or bend) near the first slit 21 when the dispensing opening 20 is opened. As a result, the dispensing opening 20 is easier to open with a fingertip, making it easier to take out the first sheet or set of sheets S contained in the packaging bag 10.

[0103] In the packaging bag 10, the dispensing opening 20 has second slits 22 and 23 that extend to one side in the second direction (Y direction) (the front surface 13 side of the packaging bag 10) such that the opening 20 curves away from the first direction (X direction) from the first slit 21. As a result, a part 11B of the top surface 11 covering the dispensing opening 20 (the part corresponding to the flap F1) is more likely to curl upward (or bend) even near the second slits 22 and 23. This allows the opening width of the dispensing opening 20 to widen near both the first slit and the second slits 22 and 23 when pulling out the sheet S from the dispensing opening 20, enabling the sheet S to be smoothly removed from the dispensing opening 20.

[0104] Furthermore, with this configuration, the packaging bag 10 prevents the sheets S from getting stuck in the ends of the dispensing opening 20 (corresponding to the second slits 22 and 23) or the dispensing opening 20 from tearing when the sheets S are removed. As a result, even when the amount of sheets S stored inside decreases, the sheets S being pulled out are less likely to get caught in the dispensing opening 20, thus preventing the packaging bag 10 from lifting up.

[0105] Furthermore, in the packaging bag 10, the dispensing opening 20 has a flap F2 formed along the curved first slit 21 and a part 11B (corresponding to the flap F1) of the top surface 11 that covers the dispensing opening 20. The sheet S held in the dispensing opening 20 is held between the part 11B of the top surface 11 that covers the dispensing opening 20 and the flap F2 formed along the first slit 21, thus preventing the sheet S from falling out.

[0106] Furthermore, in the packaging bag 10, the sheet S is supported between a portion 11B (corresponding to the flap F1) of the top surface 11 that covers the dispensing opening 20 and the flap F2 formed along the first slit 21. This makes it less likely for the sheet S held in the dispensing opening 20 to fall over. As a result, the sheet S can be prevented from coming into contact with the top surface 11, allowing for hygienic use of the sheet S. [Examples]

[0107] The present disclosure will be further described in detail below using examples. The examples and comparative examples were evaluated by the following tests.

[0108] [Sheet packaging (test specimen)] As a test specimen, a sheet package 100 was prepared, in which a sheet laminate SL, consisting of multiple sheets S stacked together, was packaged in a packaging bag 10, as shown in Figure 1. The sheet laminate SL is made of tissue paper (basis weight: 10.7 g / m²) in which the sheets S are folded alternately and stacked so that they can be pulled out one set at a time in a pop-up fashion. 2 The paper used was 110 μm thick, 2 plies, 150 sets (300 sheets), with dimensions of approximately 40 mm in height, 178 mm in width, and 100 mm in length. The laminated sheet SL was placed in the packaging bag 10 so that the lamination direction was in the height direction (Z direction) of the sheet packaging 100. The packaging bag 10 was made of polyethylene (PE) with a thickness of 40 μm. The packaging of the packaging bag 10 was sealed on both sides 15 and 16 with caramel wrapping (forming seal portions 30 and 40). The dimensions of the packaging bag 10 were approximately 180 mm in the longitudinal direction (X direction), approximately 100 mm in the depth direction (Y direction), and approximately 40 mm in the height direction (Z direction). An opening 20 extending in the longitudinal direction (X direction) was formed on the top surface 11 of the packaging bag 10.

[0109] [Openability] The ease of opening the dispensing opening 20 of the sheet packaging 100 was confirmed. As measuring equipment, a digital force gauge (IMADA DST-200N) was mounted on an electric measuring stand (IMADA MX-500N / 1000N), and a hook was attached to the end of the digital force gauge. For the measurement method, masking tape was applied to both sides in the depth direction of the test specimen (both sides of the dispensing opening) in a position that did not touch the perforations. The masking tape was folded back so that the portion adhering to the test specimen was approximately 20 mm, the folded portion was clamped with a clip, the hook was attached to the hole in the clip, and while holding down the lower clip by hand to prevent the test specimen from lifting, the digital force gauge was raised at a speed of 100 mm / min, and the maximum force applied when the perforations were opened was measured. The ease of opening was evaluated by calculating the average value from the results of 5 tests. If the average value was 18.5 N or less, it was evaluated as good (○), and if the average value exceeded 18.5 N or the above measurement could not be performed, it was evaluated as poor (×).

[0110] [Depressed] When sheets S were continuously pulled out from the sheet stack SL through the opening 20 of the packaging bag 10, from the first set to the last, the number of times the sheet S following the pulled-out sheet S fell back into the packaging bag 10 (falls) was checked. The average value of the falls was calculated from the results of 5 tests, and if the average value was less than 5.0, it was evaluated as good (○), and if the average value was 5.0 or higher, it was evaluated as poor (×).

[0111] [Waste generated] The generation of fragments (pieces, small fragments, etc. separated from the packaging bag) when opening the dispensing opening 20 was checked. Waste generation was evaluated as good (○) if no fragments were separated from the packaging bag 10, and as poor (×) if fragments were separated.

[0112] Examples and comparative examples will be described below.

[0113] [Example 1] In the sheet packaging 100 (test specimen), the dispensing opening 20 is formed by a first slit 21 extending in the first direction (X direction) of the packaging bag 10, and second slits 22 and 23 that are continuous with both ends 21A and 21B of the first slit 21 and extend to one side of the second direction (Y direction) that intersects the first direction (X direction) of the packaging bag 10 (towards the front 13 side of the packaging bag 10). The first slit 21 is curved toward one side of the second direction 22 and 23 (towards the front 13 side of the packaging bag 10), and the second slits 22 and 23 are curved toward the side away from the first slit in the first direction. The first slit 21 is formed by a perforation M1, and the planar shape of the perforation M1 is made into an arc shape without inflection points. The length of the outlet 20 in the first direction (X direction) was 120 mm, the minimum width in the second direction (Y direction) was 20 mm, the tie was 1 mm and the cut was 3.5 mm at the perforation M1 of the first slit 21, the circumference of the opening OP of the outlet 20 was 160 mm, and ties were formed at positions of 0° and 45° with respect to the imaginary line VC passing through the position where the outlet 20 is at its maximum length in the first direction (X direction) of the second slits 22 and 23, and the radius of the second slits 22 and 23 was set to 10 mm (see Figures 1 to 5). The ease of opening, drop-off, and waste generation of the fabricated test specimens were evaluated. The results are shown in Table 1.

[0114] [Example 2] Except for setting the length of the outlet 20 in the first direction (X direction) to 127 mm and the circumference of the opening OP of the outlet 20 to 166 mm, a test specimen was prepared and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0115] [Comparative Example 1] The test specimens were prepared and evaluated in the same manner as in Example 1, except that the length of the outlet 20 in the first direction (X direction) was 75 to 180 mm, the outlet 20 was formed with straight perforations, and the tie length in the perforations was 1.5 to 6.0 mm and the cut length was 0.5 to 5.0 mm. The results are shown in Table 1.

[0116] [Comparative Example 2] The ratio of the length of the opening 20 in the first direction (X direction) to the length of the top surface 11 of the packaging bag 10 in the first direction (X direction) was set to 60-90%, the width of the opening 20 in the second direction (Y direction) was set to 3-12 mm, and the maximum width W2 of the opening 20 was 5 mm, and the width W2 in the second direction (Y direction) was 5 mm, all other than being the same as in Comparative Example 1, and the opening 20 being formed with elongated ring-shaped perforations, all other than being the same as in Example 1, a test specimen was prepared and evaluated. The results are shown in Table 1.

[0117] [Table 1]

[0118] As shown in Table 1, in Examples 1 and 2, sheet packaging with an outlet that had an arc-shaped perforation of the first slit without any inflection points exhibited good ease of opening, slippage, and waste generation.

[0119] On the other hand, in Comparative Examples 1 and 2, sheet packaging with only a straight slit or an elongated slit as an opening did not have good opening and spillage, and in Comparative Example 2, waste generation was also poor.

[0120] Although embodiments of this disclosure have been described above, this disclosure is not limited to any particular embodiment, and various modifications and changes are possible within the scope of the invention as described in the claims. [Explanation of Symbols]

[0121] 100-sheet package ST Sheet (Sanitary Tissue Paper) SL sheet laminate SD stacking direction 10 packaging bags 11 Top surface 12. Base 13 Front 14 Back 15 Side view 16 Side view 20 Outlet 21. First Slit 21A, 21B end 21C Top M1 perforation C1 Cut T1 Thailand 22, 23 Second Slit 22A, 22B, 23A, 23B ends M2, M3 perforations C2, C21, C22, C23 cut T2, T21, T22 Thailand VC virtual line θ angle 30, 40 sealing part F1 flaps B1 proximal end A1 Tip F2 Flap B2 proximal end A2 tip F2 Flap B3 proximal end E edge OP opening L1, L2 Length W1, W2, W3 width D1, D2, D3 interval

Claims

1. A packaging bag that contains multiple stacked sheets, A sheet packaging body having an outlet formed on the top surface of the packaging bag, The aforementioned outlet is, The first slit extending in the first direction of the packaging bag, The packaging bag has a second slit that is continuous with both ends of the first slit and extends to one side in a second direction that intersects the first direction of the packaging bag, The first slit is curved toward one side in the second direction, The second slit is curved toward the side away from the first slit in the first direction, The first slit is formed by perforations, The sheet packaging has a perforation pattern that, when viewed from above, is an arc shape with no inflection points.

2. The sheet packaging according to claim 1, wherein the perforation has an arc shape when viewed from above.

3. The sheet packaging according to claim 1, wherein the tie-cut ratio of the perforations is 0.27 or more.

4. The sheet packaging according to claim 1, wherein the plan view shape of the second slit is an arc shape without an inflection point.

5. The sheet packaging according to claim 4, wherein the plan view shape of the second slit is arc-shaped.

6. The sheet packaging according to claim 1, wherein a first tie is formed in the second slit at a position in the first direction where the outlet has the maximum length.

7. The sheet packaging according to claim 6, wherein the second tie is provided in the second slit at a position between the first tie and the end of the first slit.

8. Multiple stacked sheets are contained within, A packaging bag having an opening on its top surface that extends in a first direction, The aforementioned outlet is, A first slit extending in the first direction, The packaging bag has a second slit that is continuous with both ends of the first slit and extends to one side in a second direction that intersects the first direction of the packaging bag, The first slit is curved toward one side in the second direction, The second slit is curved toward the side away from the first slit in the first direction, The first slit is formed by perforations, A packaging bag in which the perforations, when viewed from above, are arc-shaped with no inflection points.

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