JP7615479B2 - Sheet packaging - Google Patents

Description

The present invention relates to a sheet packaging body.

In sheet packages such as pocket tissues, a sheet such as tissue paper is contained in a packaging bag made of resin film. The top surface of the packaging bag is formed with linear perforations, and by tearing the perforations, an outlet is formed in the top surface of the packaging bag. By inserting a fingertip into the packaging bag through this outlet and pinching the topmost sheet, the sheet can be pulled out (for example, see Patent Document 1).

JP 2015-47270 A

The objective of the present invention is to provide a sheet package that allows easy removal of sheets.

The first aspect of the present invention is a sheet packaging body having a packaging bag that contains multiple stacked sheets, an access opening that opens on the top surface of the packaging bag when a portion of the top surface is torn, and a lid that is formed from the torn portion of the top surface and closes the access opening in a resealable manner, the lid having a portion of its edge connected to the top surface and a processed portion that delays the closing action of the lid.

In this specification, "opening the top surface when a portion of the top surface of the packaging bag is torn" means that an access port is formed by a tearing score line formed on the top surface, and when this tearing score line is torn, an opening is formed on the top surface of the packaging bag, and this opening becomes the access port. "Closing the access port in a resealable manner" means that the lid covers the open access port. "Part of the edge is connected to the top surface" means that the lid is fixed to the top surface via part of the edge even after the access port is opened.

Delaying the closing action of the lid refers to slowing down the movement of the lid as it tries to return to its original state to close the outlet when the lid is deployed in the direction that opens the outlet. The movement of the lid as it tries to return to its original state is thought to be the movement of the lid caused by elastic stress (hereafter referred to as stress) that occurs inside the lid due to an external force applied to the lid. One of the reasons for the delay in the closing action of the lid is thought to be that the elastic stress distribution that occurs inside the lid is discontinuously or partially alleviated by the processed portion (hereafter referred to as the stress of the lid being alleviated).

In the first aspect, the lid that closes the outlet so as to be resealable has a processed portion that delays the closing action of the lid, so that when the lid is deployed in the direction to open the outlet, the movement of the lid that attempts to return to its original state in which the deployed lid closes the outlet can be slowed. This makes it possible to maintain the deployed lid away from the outlet when the sheet is taken out from the outlet.

With this configuration, in the first aspect, even if a lid is provided to cover the outlet, the lid is unlikely to get in the way when removing the sheet from the outlet. Therefore, according to the first aspect, it is possible to provide a sheet packaging body that allows easy removal of the sheet.

In addition, in the first aspect, a portion of the torn top surface forms a lid that closes the outlet so that it can be resealed, making it difficult for dirt, dust, etc. (hereinafter, referred to as dust) to enter the packaging bag through the closed outlet. This allows the sheet packaging body to be used hygienically in the first aspect.

Furthermore, in the first aspect, a portion of the split top surface becomes a lid that closes the outlet port so that it can be resealed, and because a portion of the edge of the lid is connected to the top surface, the lid that constitutes the split top surface becomes a small piece connected to the top surface without being separated from the packaging bag. Therefore, in the first aspect, no fragments (such as pieces separated from the packaging bag) are generated when the outlet port is opened.

The second aspect of the present invention is a sheet packaging body in which a pillow packaging seal is formed on at least one end of both ends in a first direction of the top surface, the removal opening is formed on the at least one end side in the first direction, the edge of the lid body on the seal side is connected to the top surface, and the processing part is provided on the seal side of the lid body.

In this specification, the first direction refers to a direction along a specific direction on the top surface of the packaging bag. Pillow packaging refers to a packaging form in which both ends or either one end of a tubular film folded in three or a tubular film folded in a gusset shape is sealed.

In the second aspect, the processed portion of the lid is provided on the sealing portion side of the lid, so that the vicinity of the edge of the lid connected to the top surface becomes the processed portion of the lid. The vicinity of the edge on the sealing portion side of the lid is an area where stress is likely to occur when the lid is unfolded to open the outlet, so by providing the processed portion of the lid in this area, the stress on the lid is more likely to be alleviated. Therefore, according to the second aspect, the function of delaying the closing action of the lid can be improved.

In addition, in the second aspect, since the outlet is formed on at least one end side of the top surface in the first direction, the outlet is not formed on the entire top surface. Therefore, the shape of the packaging bag is easily maintained even after the outlet is opened, and the state of the sheets contained in the packaging bag is not easily disturbed. Therefore, according to the second aspect, the sheet packaging body can be used neatly to the very end.

In the second aspect, the outlet can be formed on at least one end of the top surface in the first direction, so that the outlet can open to the seal portion side of the top surface. This allows the sheet to be pulled out toward the top surface when the sheet is removed from the outlet, and also pulled out toward the seal portion along the first direction. Therefore, according to the second aspect, it is possible to provide a sheet packaging body that is easy to use.

A third aspect of the present invention is a sheet packaging body in which the processed portion extends in a second direction intersecting the first direction of the top surface. In this specification, the second direction intersecting the first direction of the top surface refers to a direction perpendicular to the first direction on the top surface or a direction along a direction intersecting a brace.

In the third aspect, the processed portion of the lid extends in a second direction intersecting with the first direction of the top surface, so that the processed portion can be provided along the edge of the lid connected to the top surface. This makes it easier to relieve stress on the lid in the third aspect, and further enhances the function of delaying the closing action of the lid.

A fourth aspect of the present invention is a sheet packaging body in which the length of the processed portion in the second direction is the same as the width of the outlet in the second direction. In the fourth aspect, by making the length of the processed portion of the lid body in the second direction the same as the width of the outlet in the second direction, the processed portion can be provided in the entire vicinity of the edge of the lid body on the seal side (the portion where stress is likely to occur when the lid body is unfolded to open the outlet). Therefore, according to the fourth aspect, the stress of the lid body is further easily alleviated, and the function of delaying the closing operation of the lid body can be further improved.

A fifth aspect of the present invention is a sheet packaging body in which the length of the processed portion in the second direction is shorter than the width of the lid body in the second direction. In the fifth aspect, by making the length of the processed portion of the lid body in the second direction shorter than the width of the lid body in the second direction, it is possible to reduce the area in which the processed portion is formed in the lid body without significantly reducing the stress relief function of the lid body. Therefore, according to the fifth aspect, it is possible to adjust the time for delaying the closing operation of the lid body while imparting the function of delaying the closing operation of the lid body.

A sixth aspect of the present invention is a sheet packaging body in which the processed portion is formed by a perforation. In this specification, a perforation refers to an alternating arrangement of cuts and ties (uncut portions between two cuts). In the sixth aspect, the processed portion of the lid body is formed by such perforations, which makes it easier to form the processed portion of the lid body. Also, in the sixth aspect, the stress on the lid body is relieved by the portion of the lid body where the perforations are provided, so that a function of delaying the closing action of the lid body can be imparted.

The seventh aspect of the present invention is a sheet packaging body in which the processed portion is formed by pressing. In this specification, pressing refers to deforming by pressing a mold or the like against the processed portion. In the seventh aspect, the processed portion of the lid is formed by such pressing, so the work of forming the processed portion of the lid is easy. Also, in the seventh aspect, the stress on the lid is relieved by the portion of the lid that has been deformed by pressing, so that a function of delaying the closing action of the lid can be imparted.

The eighth aspect of the present invention is a sheet packaging body in which the processed portion is formed by heating. In this specification, heating refers to pressing a heated mold against the sheet packaging body to cause thermal deformation. In the eighth aspect, the processed portion of the lid body is formed by such heating, so the work of forming the processed portion of the lid body is easy. Also, in the eighth aspect, the thermally deformed portion of the lid body relieves stress on the lid body, so that the function of delaying the closing action of the lid body can be imparted.

A ninth aspect of the present invention is a sheet packaging body in which a pillow-packaged seal portion is formed at each end of the top surface in a first direction, the removal opening is formed on at least one end side of both ends of the top surface in a second direction intersecting the first direction, the lid body has an edge on the at least one end side in the second direction connected to the top surface, and the processed portion is provided on the at least one edge side of the lid body.

In the ninth aspect, by providing the processed portion of the lid body on at least one end side in the second direction, the processed portion of the lid body can be provided near the edge of the lid body connected to the top surface (a portion where stress is likely to occur when the lid body is unfolded to open the outlet). Therefore, according to the ninth aspect, stress on the lid body is easily alleviated, and the function of delaying the closing action of the lid body can be improved.

In addition, in the ninth aspect, since the outlet is formed on at least one end side of the top surface in the second direction, the outlet is not formed on the entire top surface. Therefore, the shape of the packaging bag is easily maintained even after the outlet is opened, and the state of the sheets contained in the packaging bag is not easily disturbed. Therefore, according to the ninth aspect, the sheet packaging body can be used neatly to the very end.

Furthermore, in the ninth aspect, by forming the outlet on at least one end side of the top surface in the second direction, the outlet can be opened on at least one end side of the top surface in the second direction. This allows the sheet to be pulled out toward the top surface when the sheet is removed from the outlet, and can also be pulled out along the second direction to at least one end side of the second direction. Therefore, according to the ninth aspect, a sheet packaging body that is easy to use can be provided.

A tenth aspect of the present invention is a sheet packaging body in which a pillow packaging seal portion is formed at each end of the top surface in a first direction, the removal opening is formed in the center of the top surface, the lid body is connected to the top surface at at least one edge in a second direction intersecting the first direction, and the processing portion is provided on the at least one edge side of the lid body.

In this specification, the central part of the top surface refers to an area that includes the center (centroid) of the top surface and is approximately one-tenth to one-fifth of the area of the entire top surface.

In the tenth aspect, the processed portion of the lid is provided on at least one end side in the second direction, so that the processed portion of the lid can be provided near the edge of the lid connected to the top surface (a portion where stress is likely to occur when the lid is unfolded to open the outlet). Therefore, according to the tenth aspect, stress on the lid is easily alleviated, and the function of delaying the closing action of the lid can be improved.

In addition, in the tenth aspect, the outlet is formed in the center of the top surface, so the outlet is not formed on the entire top surface. Therefore, the shape of the packaging bag is easily maintained even after the outlet is opened, and the state of the sheets contained in the packaging bag is not easily disturbed. Therefore, according to the tenth aspect, the sheet packaging body can be used neatly to the very end.

Furthermore, in the tenth aspect, by forming the outlet in the center of the top surface, the outlet can be opened in the center of the top surface. This allows the sheet to be pulled out from the center of the top surface when it is taken out from the outlet. Therefore, according to the tenth aspect, it is easy to take out the sheet from the outlet, and the sheet can be taken out stably from the outlet.

An eleventh aspect of the present invention is a sheet packaging body in which the lid body is provided with an adhesive seal on the edge opposite the edge connected to the top surface. The edge opposite the edge connected to the top surface is a free end that is not connected to the top surface. The adhesive seal is a seal that adheres to the top surface while being fixed to the lid body.

In an eleventh aspect, an adhesive seal is provided on the edge of the lid opposite the edge connected to the top surface, and the adhesive seal can be pinched as a trigger to tear open a portion of the top surface. When the trigger is pulled upward, the portion of the top surface tears open, forming an outlet that opens into the top surface, and the torn portion of the top surface forms a lid that closes the outlet so that it can be resealed.

In this configuration, the outlet can be opened without pressing down on the top surface of the packaging bag. This makes it possible to prevent the sheet from tearing when the outlet is opened in the eleventh aspect.

In addition, in the eleventh aspect, since the lid is provided with such an adhesive seal, the lid can be adhered to the top surface with the outlet closed. This makes it easy to reseal the outlet with the lid. Furthermore, with the outlet closed, the shape of the packaging bag is easily maintained, and the state in which the sheets are contained within the packaging bag is less likely to become disturbed. Furthermore, since the lid is kept closed, it is possible to prevent dust from entering the packaging bag through the closed outlet.

In the eleventh aspect, since such an adhesive sticker is provided on the lid, there is a risk that the sheet will stick to the adhesive sticker when the sheet is taken out from the outlet. However, in the eleventh aspect, as described above, the movement of the unfolded lid as it returns to its original state to close the outlet can be slowed down, so that the lid is less likely to get in the way. Therefore, in the eleventh aspect, even if an adhesive sticker is provided on the lid, the sheet is less likely to stick to the adhesive sticker.

According to one aspect of the present invention, it is possible to provide a sheet package that allows easy removal of sheets.

1 is a diagram showing a sheet wrapping body according to a first embodiment; 2 is a diagram showing a sheet stack contained in the sheet packaging body of FIG. 1 . FIG. 2 is a view of the sheet packaging body of FIG. 1 as seen from the top side. 2 is a view of the sheet packaging body of FIG. 1 as seen from the bottom side. FIG. FIG. 2 is a front view of the sheet wrapping body of FIG. 1 . 2 is a view of the sheet wrapping body of FIG. 1 as seen from the left side. FIG. 2 is a view of the sheet wrapping body of FIG. 1 as seen from the right side. FIG. 4 is an enlarged view of a portion of the take-out opening and the seal portion in the sheet packaging body of FIG. 3. 2 is a diagram showing the sheet packaging body of FIG. 1 with an outlet opening. FIG. 9 is a view of the sheet wrapping body of FIG. 8 as seen from the front side. 10 is a view showing the sheet packaging body of FIG. 9 with the outlet opening closed. FIG. 11 is a diagram illustrating a first modified example of the first embodiment. FIG. 11 is a diagram illustrating a second modified example of the first embodiment. FIG. 13 is a diagram illustrating a third modified example of the first embodiment. FIG. 13 is a diagram illustrating a fourth modified example of the first embodiment. 13 is an enlarged view of a portion of the outlet and the seal portion in a sheet packaging body according to a second embodiment. FIG. 13 is an enlarged view of a portion of the outlet and the seal portion in the sheet packaging body according to the third embodiment. FIG. FIG. 13 is a diagram showing a sheet wrapping body according to a fourth embodiment. FIG. 13 is a diagram showing a sheet wrapping body according to a fifth embodiment.

The embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, unless otherwise specified, the same or corresponding configurations may be given the same reference numerals and the description may be omitted. In each drawing, the scale of each component may differ from the actual scale.

In each figure, a three-dimensional Cartesian coordinate system is used in three axial directions (X, Y, and Z directions), with the longitudinal direction of the sheet packaging body defined as the X direction, the width direction defined as the Y direction, and the height direction (vertical direction) defined as the Z direction. Furthermore, the upper side refers to the upper side of the top surface of the packaging bag in the height direction (Z direction) of the sheet packaging body, and the lower side refers to the lower side of the top surface of the packaging bag in the height direction (Z direction) of the sheet packaging body.

Fig. 1 is a diagram showing a sheet packaging body according to a first embodiment. Fig. 2 is a diagram showing a sheet laminate housed in the sheet packaging body of Fig. 1. Fig. 3 is a diagram showing the sheet packaging body of Fig. 1 as viewed from the top side. Fig. 4 is a diagram showing the sheet packaging body of Fig. 1 as viewed from the bottom side. Fig. 5 is a diagram showing the sheet packaging body of Fig. 1 as viewed from the front side. Fig. 6 is a diagram showing the sheet packaging body of Fig. 1 as viewed from the left side side. Fig. 7 is a diagram showing the sheet packaging body of Fig. 1 as viewed from the right side side.

As shown in FIG. 1, the sheet packaging body 100 according to the first embodiment has a packaging bag 10 and an outlet 20. The sheet packaging body 100 is an example of a sheet packaging body according to an embodiment. The packaging bag 10 and the outlet 20 are an example of a packaging bag and an outlet that constitute the sheet packaging body according to an embodiment.

As shown in FIG. 1, the packaging bag 10 contains multiple stacked sheets (or multiple sets) of sheets S (hereinafter referred to as the sheet stack SL). The sheet stack SL is contained in the packaging bag 10 so that the stacking direction (LD direction) of the sheets S is the height direction (Z direction) (FIGS. 1 and 2). The sheet stack SL is designed so that the sheets S can be pulled out one by one (or one set by one) through an outlet 20 (opening OP) formed in the packaging bag 10 (FIG. 9).

The form of the sheet stack SL is not particularly limited, and may be, for example, a stack in which the sheets S are folded so that the creases F of the sheets S can be pinched (Figure 2), a stack in which the sheets S are folded and alternately stacked (a so-called pop-up sheet stack), or a stack in which multiple sheets S are simply stacked.

The dimensions of the sheet laminate SL can be such that the length in the longitudinal direction (X direction) of the sheet wrapping body 100 is 80 mm or more and 195 mm or less, the width in the transverse direction (Y direction) perpendicular to the longitudinal direction (X direction) of the sheet wrapping body 100 is 50 mm or more and 145 mm or less, and the height in the height direction (Z direction) is 5 mm or more and 80 mm or less (Figure 2).

The form of the sheet stack SL is not particularly limited. For example, the sheet stack SL may be one in which one sheet (or a set of sheets) is Z-folded, the top and bottom fold edges are folded in half, and the sheets are further folded in half at the center in the longitudinal direction and stacked.

The form of the sheets S constituting the sheet laminate SL is not particularly limited, and can be applied to sanitary thin papers such as tissue paper, toilet paper, kitchen paper, paper towels, etc. These sanitary thin papers also include sanitary thin papers containing moisturizing ingredients (e.g., lotion tissue, etc.). Furthermore, these sanitary thin papers may contain aqueous solutions of alcohol or sodium hypochlorite, fragrances such as air fresheners, chemicals such as deodorants, etc.

The use of the sheet S is not particularly limited, and it can be used for industrial, household, or portable purposes. Among these, the sheet in this embodiment is preferably used as a lotion tissue for household or portable use.

The number of plies of the sheet S is not particularly limited and can be one or more, preferably one ply, and more preferably two plies (two plies stacked). The shape of the sheet S is also not particularly limited, and for example, it is preferable that the shape of the two-ply sheet when folded is quadrangular (rectangular, square, etc.) in a plan view.

The material of the sheet S is not particularly limited, and may be, for example, a sheet of paper, nonwoven fabric, cloth, or the like, and is preferably a paper sheet (hereinafter referred to as a 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 a known composition for paper sheets. For example, the blending ratio of pulp may be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

The pulp composition in the sheet S (paper sheet) is not particularly limited. For example, any ratio of softwood pulp such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp) and hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp) can be used. The ratio of softwood pulp to hardwood pulp is not limited, and is preferably 10:90 to 80:20, and more preferably a pulp composition in which the ratio of softwood pulp to hardwood pulp is higher. The pulp contained in the sheet S (paper sheet) may be recycled paper pulp.

The basis weight of the sheet S is not particularly limited, but is preferably 5 g/m2 or ^more and 80 g/m2 ^{or less} in the case of paper, and 20 g/m2 or ^more and 100 g/m2 or ^less in the case of nonwoven fabric, depending on the number of plies. The basis weight can be measured in accordance with the provisions of JIS P 8124.

The thickness of the sheet S (paper sheet) is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be used. For example, the thickness of the sheet S (paper sheet) can be 50 μm or more and 500 μm or less per two plies, preferably 60 μm or more and 330 μm or less, and more preferably 100 μm or more and 200 μm or less.

The sheet S (paper sheet) may also be embossed. Such embossing can be performed using a known embossing method.

In this embodiment, the sheet S (sheet laminate SL) is pillow-packaged. Pillow packaging is a packaging form in which both ends or one of both ends of a cylindrical film folded in three or a cylindrical flexible film folded in a gusset shape are sealed. Specifically, in the sheet packaging body 100, seal portions 30, 40 are formed at both ends 10A, 10B in the first direction (X direction) of the packaging bag 10 so that the sheet laminate SL is pillow-packaged (Figs. 1 and 3).

The sealed portion 30 extends in a second direction (Y direction) intersecting the first direction (X direction) on the same plane as the top surface 11, and constitutes a part of the packaging bag 10 that seals the end 11A of the packaging bag 10. The sealed portion 40 extends in the second direction (Y direction), and constitutes a part of the packaging bag 10 that seals the end 11B of the packaging bag 10. The sealed portion 40 is an example of a sealed portion in a sheet packaging body according to an embodiment (a sealed portion of a pillow package formed at least one end of both ends in the first direction of the top surface).

The first direction (X direction) refers to a direction along a specific direction on the top surface 11 of the packaging bag 10 (Figs. 1 and 3). The second direction (Y direction) that intersects with the first direction (X direction) on the same plane as the top surface 11 refers to a direction perpendicular to the first direction (X direction) on the top surface 11 of the packaging bag 10 or a direction that intersects with the braces (Figs. 1 and 3).

The material of the packaging bag 10 is not particularly limited, and resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), etc. can be used.

Among these resins, polyethylene, polypropylene, polyethylene terephthalate, and the like are preferred from the viewpoints of flexibility, excellent handling, high sealing properties, and low cost. Polyethylene is also preferred from the viewpoints of odorlessness, excellent water resistance and chemical resistance, and low cost mass production. As polyethylene, high density polyethylene, low density polyethylene, and the like can be used. Polypropylene is also preferred from the viewpoints of robustness, ease of molding, good color development when printed, and ability to impart gloss.

The form of 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 in which the above-mentioned resin is laminated, or a mixed film formed of a mixture of two or more of the above-mentioned resins.

The thickness of the packaging bag 10 is not particularly limited, and is preferably 10 μm or more and 100 μm or less, and more preferably 15 μm or more and 70 μm or less. By making the thickness of the packaging bag 10 10 μm or more, sufficient strength for the packaging bag 10 in which the sheet S is contained can be ensured. Furthermore, by making the thickness of the packaging bag 10 100 μm or less, the flexibility and light weight of the packaging bag 10 can be ensured, and costs can be reduced.

The material from which the packaging bag 10 is made is not limited to the resin material such as the flexible film described above, and paper materials (such as craft paper) may also be used. The material from which the packaging bag 10 is made may also be biodegradable materials (such as biodegradable plastics and biodegradable paper) or biomass materials (renewable organic resources derived from living organisms, such as biomass film, excluding fossil resources).

The packaging bag 10 has a top surface 11 and a bottom surface 12. In the sheet packaging body 100, the top surface 11 and the bottom surface 12 face each other in the vertical direction (Z direction) (Figs. 1, 3 to 7). The top surface 11 is an example of the top surface of the packaging bag that constitutes the sheet packaging body according to this embodiment.

The top surface 11 has ends 11A, 11B in the first direction (X direction) and ends 11C, 11D in the second direction (Y direction). Sealing portions 30, 40 are formed on the ends 11A, 11B of the top surface 11 (Fig. 3). The bottom surface 12 has ends 12A, 12B in the first direction (X direction) and ends 12C, 12D in the second direction (Y direction). Sealing portions 30, 40 are formed on the ends 12A, 12B of the bottom surface 12, together with the ends 11A, 11B of the top surface 11 (Fig. 4).

The dimensions of the packaging bag 10 can be such that the length L1 in the longitudinal direction (X direction) of the sheet packaging body 100 is 80 mm or more and 200 mm or less, the width W1 in the lateral direction (Y direction) perpendicular to the longitudinal direction (X direction) of the sheet packaging body 100 is 50 mm or more and 150 mm or less, and the height H1 in the height direction (Z direction) is 5 mm or more and 85 mm or less (FIG. 3 ). Note that the dimensions of the packaging bag 10 are shown in a state in which the sheet laminate SL is contained in the packaging bag 10 (FIGS. 1 to 7).

The outlet 20 is formed on the top surface 11, through which the sheet S is taken out (Fig. 9). The outlet 20 opens on the top surface 11 when a portion BL of the top surface 11 of the packaging bag 10 is torn open (Figs. 1 and 9). In this embodiment, the outlet 20 is formed by a tearing cut line CL (e.g., a perforation) formed on the top surface 11, and when this tearing cut line CL is torn, an opening OP is formed on the top surface 11 of the packaging bag 10, and this opening OP becomes the outlet 20 (Figs. 1, 3, and 9).

The cut line CL for splitting is a cut line where cuts C1 and ties T1 (the uncut parts between two cuts C1) are arranged alternately, and when a tie T1 breaks, the adjacent cuts C1 on both sides become continuous cuts (Figs. 1 and 3). In the cut line CL for splitting, the length of the cuts C1 and the length of the ties T1 are arbitrary.

In the tearing cut line CL, the length of each cut C1 can be 0.8 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 3.5 mm or less. Also, 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.

The shape of the outlet 20 is arbitrary. In this embodiment, the shape of the outlet 20 is a semi-ellipse in a plan view. The outlet 20 is formed so that it extends from an end 20A on the end 11B side of the top surface to an end 20B, and is convex 20C from the end 11B of the top surface toward the center 11E (FIGS. 1, 3, and 8). Here, the center 11E of the top surface 11 includes the center (centroid) G of the top surface 11, and indicates an area of about one-tenth to one-fifth of the entire top surface 11 (FIG. 3).

The spacing L2 of the outlets 20 in the first direction (X direction) is 20% to 60% of the length L1 of the packaging bag 10 in the longitudinal direction (X direction), preferably 30% to 55%, and more preferably 40% to 50%. The spacing W2 of the outlets 20 in the second direction (Y direction) is 50% to 90% of the width W1 of the packaging bag 10 in the width direction (Y direction), preferably 60% to 85%, and more preferably 70% to 80% (Figure 3).

The sheet packaging body 100 of this embodiment further includes a lid body 50. The lid body 50 is formed from a portion BL of the cleaved top surface 11, and closes the outlet 20 in a reclosable manner. Here, closing the outlet 20 in a reclosable manner means that the lid body 50 covers the open outlet 20 (opening OP) (FIGS. 9 and 11).

The lid body 50 has a portion of its edge 51 connected to the top surface 11. Here, "a portion of its edge 51 connected to the top surface 11" means that the lid body 50 remains fixed to the top surface 11 via the portion of its edge 51 even after the outlet 20 (opening OP) is opened (Figure 9).

In the sheet packaging body 100 of this embodiment, the lid body 50 is provided with a processed portion 60 (FIGS. 1 and 8). The processed portion 60 has a function of delaying the closing action of the lid body 50. Here, delaying the closing action of the lid body 50 means slowing down the movement of the lid body 50 to return to its original state for closing the outlet 20 when the lid body 50 is unfolded in the direction of opening the outlet 20.

The movement of the lid body 50 to return to its original state is believed to be the movement of the lid body 50 caused by elastic stress (hereinafter referred to as stress) generated inside the lid body 50 due to an external force applied to the lid body 50. The elastic stress distribution generated inside the lid body 50 is discontinuously or partially alleviated by the processed portion 60 (hereinafter referred to as the stress of the lid being alleviated), which is believed to be one of the reasons why the closing operation of the lid body 50 is delayed (Figures 9 and 10).

In the sheet packaging body 100 of this embodiment, the removal opening 20 is formed on the end 11B side in the first direction (X direction). The edge 51 of the lid body 50 on the sealing portion 40 side is connected to the top surface 11. The processing portion 60 is provided on the sealing portion 40 side of the lid body 50 (FIGS. 1, 3, and 8).

In the sheet packaging body 100 of this embodiment, the processed portion 60 extends in a second direction (Y direction) that intersects with the first direction (X direction) of the top surface 11. Specifically, the processed portion 60 extends parallel to the sealed portion 40 along the second direction (Y direction) at a position that is a distance L3 of about 1 mm away from the sealed portion 40 in the first direction (X direction) (FIGS. 3 and 8).

The distance L3 between the sealing portion 40 and the processed portion 60 in the first direction (X direction) is not limited to the distance in this embodiment. For example, the distance L3 between the sealing portion 40 and the processed portion 60 is 0.5% to 20% of the distance L2 of the outlet 20 in the first direction (X direction), preferably 1% to 15%, and more preferably 2% to 10%.

The length (width W3) of the processed portion 60 in the second direction (Y direction) is not limited to the distance in this embodiment. For example, the length (width W3) of the processed portion 60 is 65% to 100% of the spacing (width W2) of the outlets 20 in the second direction (Y direction), preferably 70% to 100%, and more preferably 75 to 100% (Figure 3).

In this embodiment, the length (width W3) of the processed portion 60 in the second direction (Y direction) is the same as the width W2 in the second direction (Y direction) of the outlet 20 (FIGS. 1, 3, and 8). That is, the processed portion 60 is formed along the second direction (Y direction) from edge 53 to edge 54 in the second direction (Y direction) of the lid 50 (FIG. 8).

In order to facilitate positioning when providing the processing section 60, the processing section 60 may be provided so that the length (width W3) of the processing section 60 in the second direction (Y direction) is longer than the width W2 of the outlet 20 in the second direction (Y direction).

In the sheet packaging body 100 of this embodiment, the processed portion 60 is formed by perforations PF (FIGS. 1, 3, and 8). Here, the perforations PF are formed by alternating cuts C2 and ties T2 (the uncut portion between two cuts C2, C2) (FIG. 8). In this embodiment, the perforations PF that constitute the processed portion 60 have a ratio of the length of the cuts C2 to the length of the ties T2 of 1:1.

In the perforation PF, the length of the cut C2 and the length of the tie T2 are arbitrary. For example, the length of each cut C2 can be 0.3 mm or more and 5 mm or less, preferably 0.5 mm or more and 4.5 mm or less, and more preferably 1 mm or more and 3.5 mm or less. Also, the length of each tie T2 can be 0.3 mm or more and 5 mm or less, preferably 0.5 mm or more and 4.5 mm or less, and more preferably 1 mm or more and 3.5 mm or less.

In the sheet packaging body 100 according to this embodiment, an adhesive seal 70 is provided on the edge 52 of the lid body 50 opposite the edge 51 connected to the top surface 11 (FIGS. 1 and 3). Here, the edge 52 opposite the edge 51 connected to the top surface 11 constitutes a free end that is not connected to the top surface 11.

The adhesive seal 70 is a seal that adheres to the top surface 11 while being fixed to the lid body 50. The adhesive seal 70 is composed of a fixing part 71 fixed to the edge 52 of the lid body 50, and an adhesive part 72 that is removably attached to the top surface 11. The form of the adhesive seal 70 is not limited, and it can be, for example, a base material (not shown) on which the fixing part 71 is applied with an adhesive, and the adhesive part 72 is applied with an adhesive having a weaker adhesive strength than the fixing part 71.

The material of the substrate is not limited, but may be a resin material such as the flexible film used in the packaging bag 10 described above, a paper material, a biodegradable material, a biomass material, etc. The form of the substrate is not limited, and may be a single layer film, a laminate film, or a mixed film used in the packaging bag 10 described above. Furthermore, the thickness of the substrate may be the same as the thickness of the flexible film used in the packaging bag 10 described above.

The adhesive material of the fixing portion 71 is not limited, but is preferably an adhesive with an adhesive strength of 9 N/25 mm to 30 N/25 mm. The adhesive material of the adhesive portion 72 is not limited, but is preferably an adhesive with an adhesive strength of 1 N/25 mm to 8 N/25 mm. Here, adhesive strength refers to the peel resistance value measured by an adhesive strength test method based on JIS Z0237.

In the sheet packaging body 100 of the first embodiment, as described above, the lid body 50 that closes the outlet 20 in a resealable manner has a processed portion 60 that delays the closing action of the lid body 50, so that when the lid body 50 is unfolded in the direction to open the outlet 20, the movement of the unfolded lid body 50 that attempts to return to its original state to close the outlet 20 can be slowed down. This makes it possible to maintain the unfolded lid body 50 away from the outlet 20 when the sheet S is taken out from the outlet 20 (FIGS. 9 and 10).

In this embodiment, even if a lid 50 is provided to cover the outlet 20, the lid 50 is unlikely to get in the way when removing the sheet S from the outlet 20 (FIGS. 9 and 10). Therefore, this embodiment can provide a sheet packaging body 100 that allows easy removal of the sheet S.

In addition, in this embodiment, the ruptured portion BL of the top surface 11 constitutes a lid 50 that closes the outlet 20 in a resealable manner, making it difficult for dirt, dust, and the like (hereinafter referred to as dust) to enter the packaging bag 10 through the closed outlet 20. This allows the sheet packaging body 100 to be used hygienically in this embodiment (FIG. 11).

Furthermore, in this embodiment, the cleaved portion BL of the top surface 11 becomes the lid 50 that closes the outlet 20 in a resealable manner, and a portion of the edge 51 of the lid 50 is connected to the top surface 11, so that the lid 50 constituting the cleaved portion BL of the top surface 11 becomes a small piece BL that is connected to the top surface 11 without being separated from the packaging bag 10. Therefore, in this embodiment, no fragments (such as pieces separated from the packaging bag 10) are generated when the outlet 20 is opened (Figures 9 to 11).

In the sheet packaging body 100 of the first embodiment, as described above, the processed portion 60 of the lid body 50 is provided on the seal portion 40 side of the lid body 50, so that the vicinity 51A of the edge 51 of the lid body 50 connected to the top surface 11 becomes the processed portion 60 of the lid body 50. The vicinity 51A of the edge 51 on the seal portion 40 side of the lid body 50 is a portion where stress is likely to occur when the lid body 50 is unfolded to open the removal opening 20, so by providing the processed portion 60 of the lid body 50 in this portion, the stress of the lid body 50 is easily alleviated. Therefore, according to this embodiment, the function of delaying the closing operation of the lid body 50 can be improved (FIGS. 9 and 10).

In addition, in this embodiment, the outlet 20 is formed on one end 11B side of the top surface 11 in the first direction (X direction), so the outlet 20 is not formed on the entire top surface 11. Therefore, the shape of the packaging bag 10 is likely to be maintained even after the outlet 20 is opened, and the storage state of the sheet S (sheet stack SL) inside the packaging bag 10 is unlikely to be disturbed. Therefore, according to this embodiment, the sheet packaging body 100 can be used neatly to the very end (Figs. 9 and 10).

In addition, in this embodiment, by forming the outlet 20 on one end 11B side of the top surface 11 in the first direction (X direction), the outlet 20 can be opened on the sealing portion 40 side of the top surface 11. As a result, when removing the sheet S from the outlet 20, the sheet S can be pulled out toward the top surface 11, and can also be pulled out toward the sealing portion 40 along the first direction (X direction). Therefore, according to this embodiment, it is possible to provide a sheet packaging body 100 that is easy to use (Figs. 9 and 10).

In the sheet packaging body 100 of the first embodiment, as described above, the processed portion 60 of the lid body 50 extends in the second direction (Y direction) intersecting with the first direction (X direction) of the top surface 11, so that the processed portion 60 can be provided along the edge 51 of the lid body 50 connected to the top surface 11. As a result, in this embodiment, the stress of the lid body 50 is further easily alleviated, and the function of delaying the closing operation of the lid body 50 can be further improved (Figures 9 and 10).

In this embodiment, as described above, by making the length (width W3) of the processed portion 60 of the lid 50 in the second direction (Y direction) the same as the width W2 of the outlet 20 in the second direction (Y direction), the processed portion 60 can be provided over the entire vicinity 51A of the edge 51 on the seal portion 40 side of the lid 50 (a portion where stress is likely to occur when the lid 50 is unfolded to open the outlet 20). Therefore, according to this embodiment, the stress of the lid 50 is further easily alleviated, and the function of delaying the closing operation of the lid 50 can be further improved (Figures 9 and 10).

In this embodiment, as described above, the processing portion 60 of the lid body 50 is configured with the perforations PF, which makes it easier to form the processing portion 60 of the lid body 50. In addition, in this embodiment, the portion of the lid body 50 where the perforations PF are provided (processing portion 60) relieves stress on the lid body 50, so that it is possible to provide a function of delaying the closing operation of the lid body 50.

In this embodiment, as described above, the adhesive seal 70 is provided on the edge 52 opposite to the edge 51 connected to the top surface 11 of the lid 50, so that the adhesive seal 70 can be pinched as a trigger TG for tearing open the portion BL of the top surface 11. When the trigger TG is pulled upward, the portion BL of the top surface 11 tears open, forming an outlet 20 that opens into the top surface 11, and the torn portion BL of the top surface 11 constitutes the lid 50 that closes the outlet 20 in a resealable manner (Fig. 1, Figs. 9 to 11).

In this embodiment, this configuration allows the outlet 20 to be opened without pressing the top surface 11 of the packaging bag 10. This prevents the sheet S from being torn when the outlet 20 is opened (FIGS. 1, 3, 9, and 10).

In addition, in this embodiment, since the lid 50 is provided with such an adhesive seal 70, the lid 50 can be adhered to the top surface 11 with the outlet 20 closed. This makes it easy to reseal the outlet 20 with the lid 50. Furthermore, with the outlet 20 closed, the shape of the packaging bag 10 is easily maintained, and the state in which the sheets S (sheet stack SL) are contained within the packaging bag 10 is less likely to be disturbed. Furthermore, because the lid 50 is kept closed, it is possible to prevent dust from entering the packaging bag 10 through the closed outlet 20 (Figures 1, 3, 9 to 11).

In this embodiment, since the lid 50 is provided with such an adhesive seal 70, there is a risk that the sheet S will stick to the adhesive seal 70 when the sheet S is taken out from the outlet 20. However, in this embodiment, as described above, the movement of the unfolded lid 50 as it returns to its original state to close the outlet 20 can be slowed down, and the lid 50 is less likely to get in the way. Therefore, in this embodiment, even if the adhesive seal 70 is provided on the lid 50, the sheet S is less likely to stick to the adhesive seal 70 (FIGS. 1, 3, 9, 10).

Figure 12 is a diagram showing a first modified example of the first embodiment. In Figure 12, the parts common to Figure 8 will not be described. In the sheet packaging body 100 according to the first modified example of the first embodiment, the processed portion 60 extends parallel to the sealed portion 40 along the second direction (Y direction) at a position at a distance L3 of about 5 mm from the sealed portion 40 in the first direction (X direction) (Figure 12).

In the first modified example of the first embodiment, the distance between the processed portion 60 and the seal portion 40 is longer than in the first embodiment described above (FIG. 8). However, since the processed portion 60 is provided over the entire vicinity 51A (a portion where stress is likely to occur when the lid body 50 is unfolded to open the outlet 20) close to the edge 51 on the seal portion 40 side of the lid body 50, the stress on the lid body 50 is alleviated, and the function of delaying the closing operation of the lid body 50 can be maintained (FIGS. 9 and 10).

Figure 13 is a diagram showing a second modified example of the first embodiment. In Figure 13, the parts common to Figure 8 will not be described. In the sheet packaging body 100 according to the second modified example of the first embodiment, the length (width W3) of the processed portion 60 in the second direction (Y direction) is shorter than the width W2 of the lid body 50 in the second direction (Y direction) (Figure 13).

In the second modified example of the first embodiment, the length (width W3) of the processed portion 60 of the lid body 50 in the second direction (Y direction) is made shorter than the width W2 of the lid body 50 in the second direction (Y direction), thereby making it possible to reduce the area in which the processed portion 60 is formed in the lid body 50 without significantly reducing the stress relief function of the lid body 50. Therefore, according to this embodiment, it is possible to adjust the time for delaying the closing operation of the lid body 50 while imparting the function of delaying the closing operation of the lid body 50.

Figure 14 is a diagram showing a third modified example of the first embodiment. In Figure 14, the parts common to Figure 8 will not be described. In the sheet packaging body 100 according to the second modified example of the first embodiment, the processed portion 60 is composed of a pair of processed portions 60 spaced apart from each other on the edge 53, 54 side of the lid body 50 in the second direction (Y direction) (Figure 14).

In the third modified example of the first embodiment, the length (sum of widths W31 and W32) of the processed portion 60 in the second direction (Y direction) is shorter than the width W2 of the lid body 50 in the second direction (Y direction) (FIG. 14). Therefore, in this embodiment, similar to the second modified example of the first embodiment (FIG. 13), it is possible to reduce the formation area of the processed portion 60 in the lid body 50 without significantly reducing the stress relaxation function of the lid body 50.

Figure 15 is a diagram showing a fourth modified example of the first embodiment. In Figure 15, the parts common to Figure 8 will not be described. In the sheet packaging body 100 according to the fourth modified example of the first embodiment, the perforation PF constituting the processed portion 60 has a ratio of the length of the cut C2 to the length of the tie T2 of 3:1 (Figure 15).

In the fourth modified example of the first embodiment, compared to the first embodiment described above (FIG. 8), even if the ratio between the length of cut C2 and the length of tie T2 is changed so that the length of cut C2 is longer than the length of tie T2, the processed portion 60 is provided over the entire vicinity 51A (a portion where stress is likely to occur when the lid body 50 is unfolded to open the outlet 20) close to the edge 51 on the sealing portion 40 side of the lid body 50, so in this embodiment, the stress on the lid body 50 is alleviated and the function of delaying the closing operation of the lid body 50 can be maintained (FIG. 15).

Figure 16 is an enlarged view of a portion of the removal opening and the seal portion in the sheet packaging body according to the second embodiment. In Figure 16, the portions common to Figure 8 will not be described. In the sheet packaging body 200 of the second embodiment, the processed portion 60 is formed by pressing. Here, pressing refers to pressing a mold or the like against the processed portion to cause deformation. In this embodiment, the portion of the lid body 50 where the processed portion 60 is provided is configured as the pressure deformation portion PD (Figure 16).

In the second embodiment, the processed portion 60 of the lid body 50 is formed by such pressing, so the work of forming the processed portion 60 of the lid body 50 is easy. Also, in the second embodiment, the stress of the lid body 50 is relieved by the pressurized and deformed portion of the lid body 50 (pressurized and deformed portion PD), so that a function of delaying the closing action of the lid body 50 can be imparted (FIG. 16).

Figure 17 is an enlarged view of a portion of the removal opening and the seal portion in a sheet packaging body according to the third embodiment. In Figure 17, the portions common to Figure 8 will not be described. In the sheet packaging body 300 of the third embodiment, the processed portion 60 is formed by heating. Here, heating refers to pressing a heated mold against the processed portion to cause thermal deformation. In this embodiment, the portion of the lid body 50 where the processed portion 60 is provided is configured as a thermally deformed portion HD (Figure 17).

In the third embodiment, the processed portion 60 of the lid body 50 is formed by such heating, so the work of forming the processed portion 60 of the lid body 50 is easy. Also, in the third embodiment, the thermally deformed portion of the lid body 50 (thermally deformed portion HD) relieves the stress of the lid body 50, so that it is possible to provide a function of delaying the closing operation of the lid body 50 (FIG. 17).

Figure 18 is a diagram showing a sheet packaging body according to the fourth embodiment. In Figure 18, the description of the parts common to Figure 3 will be omitted. In the sheet packaging body 400 of the fourth embodiment, the removal opening 20 is formed on one end 11C of both ends 11C, 11D in the second direction (Y direction) intersecting with the first direction (X direction) of the top surface 11, and the edge 51 of the lid body 50 on the one end 11C side in the second direction (Y direction) is connected to the top surface 11, and the processing portion 60 is provided on the one edge 51 side of the lid body 50 (Figure 18).

In the fourth embodiment, the processed portion 60 of the lid body 50 is provided on one end 11C side in the second direction (Y direction), so that the processed portion 60 of the lid body 50 can be provided in the vicinity 51A of the edge 51 of the lid body 50 connected to the top surface 11 (a portion where stress is likely to occur when the lid body 50 is unfolded to open the outlet 20). Therefore, according to the fourth embodiment, the stress of the lid body 50 is easily alleviated, and the function of delaying the closing operation of the lid body 50 can be improved (Figure 18).

In addition, in the fourth embodiment, the outlet 20 is formed on one end 11C of the top surface 11 in the second direction (Y direction), so the outlet 20 is not formed on the entire top surface 11. Therefore, the shape of the packaging bag 10 is easily maintained even after the outlet 20 is opened, and the storage state of the sheet S (sheet stack SL) inside the packaging bag 10 is not easily disturbed. Therefore, according to the fourth embodiment, the sheet packaging body 100 can be used neatly to the very end (FIG. 18).

Furthermore, in the fourth embodiment, by forming the outlet 20 on one end 11C side in the second direction (Y direction) of the top surface 11, the outlet 20 can be opened on one end 11C side in the second direction (Y direction) of the top surface 11. As a result, when the sheet S is taken out from the outlet 20, the sheet S can be pulled out toward the top surface 11, and can also be pulled out along the second direction (Y direction) to one end 11C side in the second direction (Y direction). Therefore, according to the fourth embodiment, it is possible to provide a sheet packaging body 100 that is easy to use (FIG. 18).

Figure 19 is a diagram showing a sheet packaging body according to the fifth embodiment. In Figure 19, the description of the parts common to Figure 3 will be omitted. In the sheet packaging body 500 of the fifth embodiment, the removal opening 20 is formed in the center 11E of the top surface 11, the lid body 50 has one edge 51 connected to the top surface 11 in a second direction (Y direction) intersecting with the first direction (X direction) of the top surface 11, and the processing portion 60 is provided on the one edge 51 side of the lid body 50 (Figure 19).

In the fifth embodiment, the processed portion 60 of the lid body 50 is provided on one end 11C side in the second direction (Y direction), so that the processed portion 60 of the lid body 50 can be provided in the vicinity 51A of the edge 51 of the lid body 50 connected to the top surface 11 (a portion where stress is likely to occur when the lid body 50 is unfolded to open the outlet 20). Therefore, according to the fifth embodiment, the stress of the lid body 50 is easily alleviated, and the function of delaying the closing operation of the lid body 50 can be improved (FIG. 19).

In addition, in the fifth embodiment, the outlet 20 is formed in the center 11E of the top surface 11, and therefore the outlet 20 is not formed over the entire top surface 11. Therefore, the shape of the packaging bag 10 is easily maintained even after the outlet 20 is opened, and the state in which the sheets S (sheet stack SL) are contained within the packaging bag 10 is not easily disturbed. Therefore, according to the fifth embodiment, the sheet packaging body 100 can be used neatly to the very end (FIG. 19).

Furthermore, in the fifth embodiment, the outlet 20 is formed in the central portion 11E of the top surface 11, so that the outlet 20 can be opened in the central portion 11E of the top surface 11. This allows the sheet S to be pulled out from the central portion 11E of the top surface 11 when removing the sheet S from the outlet 20. Therefore, according to the fifth embodiment, the sheet S can be easily removed from the outlet 20, and the sheet S can be stably removed from the outlet 20 (FIG. 19).

The present embodiment will now be described in more detail using examples. The examples and comparative examples were evaluated using the following tests.

[Sheet packaging (test specimen)]
A sheet package in which a plurality of sheets (laminate) were packaged in a packaging bag was prepared as a test specimen (FIGS. 1 to 19). The sheet laminate was a tissue paper containing moisturizing ingredients in which sheets were laminated in a folded state (product name "Elleair Zeitaku Moisturizing", manufactured by Daio Paper Corporation, 2 ply, number of sets: 14 sets (28 sheets), dimensions: length (width) about 125 mm, depth (length) about 75 mm), height (bulk) about 13 mm. The sheet laminate was placed in the packaging bag so that the stacking direction was the height direction (Z direction) of the sheet package. The packaging bag was made of polyethylene (PE) with a thickness of 62 μm. The packaging form of the packaging bag was a pillow package in which both ends in the longitudinal direction of the packaging bag were sealed to form a seal portion. The dimensions of the packaging bag were a length in the longitudinal direction of about 134 mm, a width in the transverse direction of about 84 mm, and a height in the vertical direction of about 12 mm. A tearing score line is provided on the top surface 11 of the packaging bag 10, which forms an opening on the top surface when the top surface of the packaging bag is torn. A lid body is formed from a part of the torn top surface and closes the opening so that it can be resealed, and a part of the edge of the lid body is connected to the top surface. A processed part is provided on the lid body to delay the closing action of the lid body.

[Sheet tears when opened]
The tearing of the sheet when the sheet package was opened was confirmed when the top surface of the packaging bag was torn along the tearing score line to open the outlet. The tearing of the sheet when opened was evaluated as ◯ (good) when the sheet was not torn when opened, and × (bad) when it was torn.

[Lid angle]
The angle of the lid in the sheet packaging was measured when the top surface of the packaging bag was torn along the tearing score line, the lid was opened about 180° in the direction of opening the outlet, and left for about 3 seconds. The angle was the angle θ from the edge connected to the top surface of the lid to the tip (opposite edge) from the outlet (Figure 10).

[Removability]
The ease of removal of the sheet package was checked by tearing the top surface of the packaging bag along the tearing score line and unfolding the lid in the direction of opening the outlet. The ease of removal was evaluated as ◯ (good) when the lid angle was 90° or more in the above-mentioned confirmation of openability, and × (bad) when it was less than 90°.

[Sheet sticking]
Regarding the adhesion of the sheet in the sheet packaging, the lid was unfolded in the direction of opening the outlet, and the adhesion of the sheet to the adhesive seal of the lid was checked when the sheet was taken out from the outlet. When the sheet did not stick to the adhesive seal of the lid, it was marked as ◯ (good), and when it did stick, it was marked as × (bad).

[Storage]
The storage stability of the sheet packaging was checked by checking the disorder of the sheet (laminated sheet) after the outlet was opened. The storage stability was evaluated as ⊚ (very good) when the outlet was kept closed and the sheet (laminated sheet) did not collapse in the packaging bag, ◯ (good) when the sheet (laminated sheet) did not collapse in the packaging bag, and × (bad) when it collapsed.

[Hygiene]
The sanitation of the sheet packaging was checked by checking the ease of dust intrusion from the outlet after it was opened. The sanitation was evaluated as follows: ◎ (very good) when the outlet was kept closed and the gap between the outlet and the lid was less than 1 mm at most; ○ (good) when the gap between the outlet and the lid was less than 1 mm at most; and × (bad) when the gap between the outlet and the lid was 1 mm or more at most.

The following describes examples and comparative examples.

[Example 1]
A semi-elliptical outlet (cut line for tearing) with a dimension of 55 mm in the width direction (second direction) and 40 mm in the length direction (first direction) of the packaging bag is formed at the end in the length direction of the packaging bag, the processed portion of the lid is formed by a perforation, the ratio of the cut length to the tie length is 1:1, it is located at a distance of about 1 mm from the sealed portion in the first direction (X direction), and has a length of about 55 mm in the width direction of the packaging bag (the same length as the width of the outlet in the second direction) ( FIG. 8 ).

[Example 2]
Except for providing the processed portion of the lid at a distance of about 5 mm from the seal portion in the first direction (X direction) (FIG. 12), the evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

[Example 3]
The evaluation was performed in the same manner as in Example 1, except that the length of the processed portion of the lid was about 45 mm in the width direction of the packaging bag (a length shorter than the width of the outlet in the second direction) (FIG. 13). The results are shown in Table 1.

[Example 4]
The evaluation was performed in the same manner as in Example 3, except that the processed portion of the lid was configured as a pair of processed portions (two places) spaced apart from each other on the end side of the lid 50 in the second direction, and each had a length of about 20 mm in the width direction of the packaging bag ( FIG. 14 ). The results are shown in Table 1.

[Example 5]
The evaluation was carried out in the same manner as in Example 1, except that the ratio of the length of the cut perforation in the processed portion of the lid to the length of the tie was set to 3:1 (FIG. 15). The results are shown in Table 1.

Except for the fact that the processed portion of the lid was pressed to provide a pressure-deformed portion (FIG. 16), evaluation was carried out in the same manner as in Example 2. The results are shown in Table 1.

[Example 7]
Except for the fact that the processed portion of the lid was heated to provide a thermally deformed portion (FIG. 17), evaluation was performed in the same manner as in Example 2. The results are shown in Table 1.

[Example 8]
The evaluation was carried out in the same manner as in Example 1, except that an adhesive seal was provided on the edge of the lid opposite to the edge connected to the top surface (FIG. 1). The results are shown in Table 1.

[Example 9]
An outlet having a width dimension (second direction) of 25 mm and a length dimension (first direction) of 80 mm for the packaging bag was formed on one end side in the second direction of the top surface, an edge on one end side in the second direction of the lid was connected to the top surface, a processed portion was provided on the edge side connected to the top surface of the lid, and the length in the width direction of the packaging bag was about 80 mm (the same length as the width of the outlet in the first direction) (FIG. 18). Evaluation was performed in the same manner as in Example 8. The results are shown in Table 1.

[Example 10]
The evaluation was performed in the same manner as in Example 9, except that the outlet was formed in the center of the top surface, one edge of the lid in the second direction was connected to the top surface, and the processed portion was provided on the edge side of the lid connected to the top surface (FIG. 19). The results are shown in Table 1.

[Comparative Example 1]
Except for the fact that no processed portion was provided, evaluation was carried out in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 2]
Except for providing an adhesive seal on the edge opposite to the edge connected to the top surface of the lid, evaluation was performed in the same manner as in Comparative Example 1. The results are shown in Table 1.

[Comparative Example 3]
The evaluation was performed in the same manner as in Example 1, except that a linear outlet (a tearing score line) extending in the first direction was provided in the middle of the packaging bag in the second direction, and neither a lid nor a processed portion was provided. The results are shown in Table 1.

As can be seen from Table 1, a semi-elliptical removal opening (a score line for tearing) is provided at the longitudinal end of the packaging bag, a lid is formed with a part of the edge connected to the top surface when the score line for tearing is torn, and the lid is provided with a processed part for delaying the closing action of the lid. The sheet packaging body has good removal, storage, and hygiene properties (Examples 1 to 10, Figures 1 to 19).

In contrast, a sheet packaging body that did not have a processed portion on the lid that delayed the closing action of the lid had poor removal properties (Comparative Example 1). Also, a conventional sheet packaging body in which a linear removal opening (a tearing score line) was provided on the entire top surface of the packaging bag had poor storage properties and sanitation (Comparative Example 3).

In addition, the sheet packaging with an adhesive seal on the lid showed good resistance to tearing and sticking of the sheet when opened (Examples 8 to 10, Figures 1 to 7, and Figures 9 to 11).

In contrast, a sheet package in which an adhesive seal was provided on the lid but no processed portion for delaying the closing action of the lid was poor in terms of removal and sheet adhesion (Comparative Example 2). Also, a conventional sheet package in which a linear removal opening (a tearing score) was provided on the entire top surface of the packaging bag was poor in terms of tearing the sheet when opened (Comparative Example 3).

From these results, it was found that a sheet packaging body having an access opening that opens on the top surface when a portion of the top surface of the packaging bag is torn open, a lid formed from the torn portion of the top surface that closes the access opening in a resealable manner, a portion of the lid surface being connected to the top surface, and a processed portion being provided on the lid surface that delays the closing action of the lid surface, allows for easy removal of the sheet and is a sheet packaging body that is excellent in storability and hygiene.

In addition, it was found that the sheet packaging, in which the lid has an adhesive seal on the edge opposite the edge connected to the top surface, is a sheet packaging in which the sheet is less likely to tear when opened and is less likely to stick when removed from the outlet.

Although the embodiment of the present invention has been described above, the present invention is not limited to a specific embodiment, and various modifications and variations are possible within the scope of the invention described in the claims.

100 Sheet packaging body S Sheet F Fold SL Sheet laminate LD Stacking direction 10 Packaging bag 10A, 10B End 11 Top surface BL Part (small piece)
11A, 11B, 11C, 11D Ends 11E Center G Center (centroid)
12 Bottom surface 12A, 12B, 12C, 12D End 20 Extraction port CL Cut line for tearing 20A, 20B End 20C Convex C1 Cut T1 Tie OP Opening 30 Sealed portion 40 Sealed portion 50 Lid 51 Edge 51A Vicinity 52 Opposite edge 53, 54 Edge in second direction 60 Processed portion PF Perforation C2 Cut T2 Tie PD Pressure deformation portion HD Heat deformation portion 70 Adhesive seal TG Trigger 71 Fixed portion 72 Adhesive portion L1, L2, L3 Length W1, W2, W3 Width

Claims (10)

A packaging bag for accommodating a plurality of stacked sheets;
a take-out opening that opens on the top surface when a portion of the top surface of the packaging bag is torn;
a cover formed by a part of the split top surface and configured to close the outlet in a resealable manner;
The cover is connected to the top surface at a portion of an edge thereof corresponding to a portion of an edge of the opening serving as the outlet ,
The lid body is provided with a linear processed portion that delays the closing operation of the lid body,
A seal portion for pillow packaging is formed on at least one end of both ends of the top surface in the first direction,
The outlet is formed on the at least one end side in the first direction,
The lid has an edge on the sealing portion side connected to the top surface,
A sheet packaging body, wherein the processed portion is provided only in the vicinity of the end edge of the lid body. The sheet packaging body according to claim 1, wherein the processed portion extends in a second direction intersecting the first direction of the top surface. The sheet packaging body according to claim 2, wherein the length of the processed portion in the second direction is the same as the width of the outlet in the second direction. The sheet packaging body according to claim 2, wherein the length of the processed portion in the second direction is shorter than the width of the lid body in the second direction. The sheet packaging body according to any one of claims 1 to 4, wherein the processed portion is formed by a perforation. The sheet packaging body according to any one of claims 1 to 4, wherein the processed portion is formed by pressing. The sheet packaging body according to any one of claims 1 to 4, wherein the processed portion is formed by heating. A packaging bag for accommodating a plurality of stacked sheets;
a take-out opening that opens on the top surface when a portion of the top surface of the packaging bag is torn;
a cover formed by a part of the split top surface and configured to close the outlet in a resealable manner;
The cover is connected to the top surface at a portion of an edge thereof corresponding to a portion of an edge of the opening serving as the outlet ,
The lid body is provided with a linear processed portion that delays the closing operation of the lid body,
A pillow-packaged seal portion is formed at each end of the top surface in the first direction,
The outlet is formed on at least one end side of both ends of the top surface in a second direction intersecting with the first direction,
The cover has an edge on the at least one end side in the second direction connected to the top surface,
A sheet packaging body, wherein the processed portion is provided only in the vicinity of the at least one end edge of the lid body. A packaging bag for accommodating a plurality of stacked sheets;
a take-out opening that opens on the top surface when a portion of the top surface of the packaging bag is torn;
a cover formed by a part of the split top surface and configured to close the outlet in a resealable manner;
The cover is connected to the top surface at a portion of an edge thereof corresponding to a portion of an edge of the opening serving as the outlet ,
The lid body is provided with a linear processed portion that delays the closing operation of the lid body,
A pillow-packaged seal portion is formed at each end of the top surface in the first direction,
The outlet is formed in the center of the top surface,
The cover has at least one edge of the top surface in a second direction intersecting with the first direction, the edge being connected to the top surface,
A sheet packaging body, wherein the processed portion is provided only in the vicinity of the at least one end edge of the lid body. The sheet packaging body according to any one of claims 1 to 9, wherein the lid body has an adhesive seal on the edge opposite the edge connected to the top surface.

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