Sheet packaging and sheet assembly packaging

Abstract

To provide a sheet package that achieves both compactification and inhibition of decline of convenience in taking out sheets.SOLUTION: A sheet package comprises: a rectangular sheet laminate formed by laminating a plurality of sheets; a resin film packaging bag containing the sheet laminate; and a take-out slot which is formed on the top surface of the packaging bag and through which the sheets are drawn out. In the sheet package, the sheet laminate in a compressed state is contained in the packaging bag, and the volume of the sheet package is from 90% to 99% inclusive based on the volume of the sheet laminate before being contained in the packaging bag.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] For sanitary thin papers such as tissue paper, the carton type in which the web is housed in a cardboard box is widespread; however, from the standpoints of transportation, storage, disposal, environmental impact, cost, etc., there has been an increasing demand in recent years for film packs in which the web is housed in a packaging bag made of resin film (see, for example, Patent Document 1).

[0003] Furthermore, the individual film packs are further housed in a film-like packaging bag and distributed as collective packages (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-177901 A [Patent Document 2] Patent Publication No. 2021-54517 Summary of the Invention [Problem to be solved by the invention]

[0005] From the standpoint of improving transportation efficiency and reducing the amount of raw material film resin used, it has become essential to make film packs more compact. However, when film packs are made more compact, the sheets become crushed, and become more likely to get jammed or tear when removed.

[0006] An object of the present invention is to provide a sheet packaging body that is compact and prevents a decrease in ease of removal of sheets. [Means for solving the problem]

[0007] A first aspect of the present invention provides a sheet packaging body having a rectangular sheet laminate formed by stacking a plurality of sheets, a packaging bag made of a resin film for containing the sheet laminate, and an outlet formed on the top surface of the packaging bag through which the sheets are pulled out, wherein the sheet packaging body is contained in the packaging bag in a tightened state, and the volume of the sheet packaging body is 90% or more and 99% or less of the volume of the sheet laminate before it is contained in the packaging bag.

[0008] In the first aspect, the volume of the sheet packaging body is 90% or more and 99% or less of the volume of the sheet laminate before being placed in a packaging bag, so that even if the sheet laminate is placed in a packaging bag in a tightened state, the sheets are not easily crushed and can be prevented from becoming clogged or torn. Therefore, according to the first aspect, it is possible to provide a sheet packaging body that is both compact and prevents a decrease in the ease of removing the sheets.

[0009] A second aspect of the present invention provides the sheet wrapping body according to the first aspect, wherein the sheet wrapping body has a stiffness RH in a height direction of 4% or more and 10% or less.

[0010] In this specification, the hardness RH in the height direction of the sheet packaging is a hardness of 100 gf / 2 cm2 measured by a compression tester (KES-G5, manufactured by Kato Tech Co., Ltd.) at the center of the upper surface of the sheet packaging when the sheet packaging is placed so that the stacking direction of the sheet stack is perpendicular to the ground. 2 (Early detection 1.0gf / 2cm 2 This shows the ratio [(AH-BH) / (AH)] × 100(%) of the difference (AH-BH) between the length before load (AH) and the length after load (BH) to the length before load (AH) in the vertical direction of the sheet packaging when a load of 100 mm (AH-BH) is applied.

[0011] In the second aspect, the sheet packaging body has a height direction hardness RH of 4% to 10%, which prevents the sheet from being crushed in the packaging bag. Therefore, according to the second aspect, the sheet can be prevented from being easily removed.

[0012] A third aspect of the present invention provides the sheet packaging body according to the first or second aspect, wherein the sheet packaging body has a short-side stiffness RS of 2% or more and 5% or less.

[0013] In this specification, the hardness RS of the sheet packaging in the short-side direction is a hardness of 100 gf / 2 cm2 measured by a compression tester (KES-G5, manufactured by Kato Tech Co., Ltd.) at the center of the upper surface of the sheet packaging in a state where the sheet packaging is placed so that the short-side direction of the sheet laminate is perpendicular to the ground. 2 (Early detection 1.0gf / 2cm 2 This shows the ratio [(AS-BS) / (AS)] × 100(%) of the difference (AS-BS) between the length before load (AS) and the length after load (BS) of the sheet packaging body in the vertical direction to the length before load (AS) when a load of 100 mm (AS-BS) is applied.

[0014] In the third aspect, the short-side hardness RS of the sheet packaging body is 2% or more and 5% or less, so that the sheet can be prevented from being crushed in the packaging bag, and therefore, according to the third aspect, the sheet can be prevented from being easily removed.

[0015] A fourth aspect of the present invention provides the sheet packaging body according to any one of the first to third aspects, wherein the stiffness RL of the sheet packaging body in the longitudinal direction is 0.1% or more and 4% or less.

[0016] In this specification, the longitudinal hardness RL of the sheet packaging body is defined as a hardness of 100 gf / 2 cm2 measured by a compression tester (KES-G5, manufactured by Kato Tech Co., Ltd.) at the center of the upper surface of the sheet packaging body when the sheet packaging body is placed so that the longitudinal direction of the sheet laminate is perpendicular to the ground. 2 (Early detection 1.0gf / 2cm 2 When a load of 0.05 mm is applied, the length before the load (A) is compared with the length before the load (AL) in the vertical direction of the sheet packaging body. L ) and length after loading (B L ) (AL-BL) difference [(AL-BL) / (AL)] × 100 (%).

[0017] In the fourth aspect, the longitudinal stiffness RL of the sheet packaging body is 0.1% to 4%, which prevents the sheet from being crushed in the packaging bag, and therefore prevents the sheet from being easily removed.

[0018] A fifth aspect of the present invention provides a sheet packaging body according to any one of the first to fourth aspects, wherein, in the longitudinal direction of the sheet packaging body, the length of the outlet is 20% or more and 90% or less of the length of the top surface, and, in the short direction of the sheet packaging body, the width of the outlet is 20% or more and 40% or less of the width of the top surface.

[0019] In the fifth aspect, the length of the outlet is set to 20% to 90% of the length of the top surface in the longitudinal direction of the sheet packaging body, and the width of the outlet is set to 20% to 40% of the width of the top surface in the lateral direction of the sheet packaging body, so that the sheet is less likely to get stuck in the outlet. Therefore, according to the fifth aspect, even if the sheet stack is contained in a packaging bag in a tightened state, the ease of removing the sheet can be prevented from decreasing.

[0020] A sixth aspect of the present invention provides the sheet packaging body according to any one of the first to fifth aspects, wherein the shape of the outlet port is gourd-shaped or dumbbell-shaped in plan view.

[0021] In this specification, a gourd shape or a dumbbell shape refers to a shape in which the width of the center of the outlet is narrower than the width of both ends of the outlet.

[0022] In the sixth aspect, the outlet is gourd-shaped or dumbbell-shaped in plan view, so that the outlet is less likely to become clogged when the sheet is pulled out, and this can prevent the sheet from being torn or the sheet package from being lifted up. Therefore, even if the sheet stack is contained in a packaging bag in a tightened state, the ease of removing the sheet can be prevented from being reduced.

[0023] A seventh aspect of the present invention provides the sheet packaging body according to any one of the first to sixth aspects, wherein the sheet contains a moisturizing agent.

[0024] In this specification, the moisturizing agent refers to a component that has the function of absorbing moisture into the sheet by hygroscopicity and increasing the moisture content. When a sheet containing a moisturizing agent is placed in a packaging bag in a tightened sheet laminate (applied compaction), the sheet becomes thin and the sheets stick to each other, resulting in a significant decrease in ease of removal.

[0025] In contrast, in the seventh aspect, the volume of the sheet package is 90% or more and 99% or less of the volume of the sheet laminate before being placed in a packaging bag, so that even if the laminate of sheets containing a moisturizing agent is placed in a packaging bag in a tightened state, the sheets are not easily crushed, and clogging or tearing of the sheets when taken out can be prevented. 7 According to this aspect, it is possible to provide a sheet packaging body that achieves both compactness and suppression of a decrease in ease of removal of the sheet, even when the sheet contains a moisturizing agent.

[0026] An eighth aspect of the present invention provides a sheet assembly packaging body having a rectangular parallelepiped sheet laminate formed by stacking a plurality of sheets, a packaging bag made of resin film that contains the sheet laminate, an assembly of a plurality of sheet packaging bodies each having an outlet formed on the top surface of the packaging bag through which the sheets are pulled out, and an assembly packaging bag made of resin film that contains the assembly, wherein the sheet assembly packaging body is contained in the assembly packaging bag in a tightened state, and the volume of the sheet assembly packaging body is 85% or more and 95% or less of the volume of the assembly before it is contained in the assembly packaging bag.

[0027] In the eighth aspect, the volume of the sheet assembly packaging body is 85% to 95% of the volume of the assembly before it is contained in the collective packaging bag, so that even if the assembly is contained in a collective packaging bag in a tightened state, the sheets in each sheet packaging body are unlikely to be crushed, and clogging and tearing of the sheets can be prevented. Therefore, according to the eighth aspect, it is possible to provide a sheet assembly packaging body that is both compact and prevents a decrease in ease of removal of the sheets.

[0028] A ninth aspect of the present invention provides the sheet assembly packaging body according to the eighth aspect, wherein the sheet assembly packaging body has a stiffness ARH in a height direction of 2% or more and 6% or less.

[0029] In this specification, the height-wise hardness ARH of a sheet assembly packaging body refers to the ratio [(AB) / (A)] x 100(%) of the difference (AB) between the height (A) before the load and the height (B) after the load of the assembly when 10 minutes have passed since a 3 mm thick acrylic plate was placed on top of an assembly in which five sheet packaging bodies are stacked in the height direction of the sheet packaging bodies, and a weight of a specified weight (500 g or a load equivalent to five sheet packaging bodies) was placed on the center of the acrylic plate and the assembly was loaded.

[0030] In the ninth aspect, the sheet assembly wrapping body has a height direction hardness ARH of 2% to 6%, which prevents the sheet assembly wrapping body from being crushed in the assembly wrapping bag, and further prevents the sheets of each sheet wrapping body from being crushed in the wrapping bag. Therefore, according to the ninth aspect, it is possible to prevent a decrease in the ease of removing the sheets.

[0031] A tenth aspect of the present invention provides a sheet assembly packaging body according to the eighth or ninth aspect, wherein the assembly includes two to ten sheet packaging bodies stacked in the height direction of the sheet packaging bodies, such that the bottom surface of one of the sheet packaging bodies faces the top surface of the other sheet packaging body.

[0032] In a tenth aspect, in an assembly in which 2 to 10 sheet wrapping bodies are stacked in such a way that the bottom surface of one sheet wrapping body faces the top surface of the other sheet wrapping body in the height direction of the sheet wrapping bodies, compaction is also performed in the height direction of the overlapping sheet wrapping bodies. Therefore, in the tenth aspect, it is possible to prevent the sheet assembly wrapping body from expanding in the height direction of the overlapping sheet wrapping bodies.

[0033] An eleventh aspect of the present invention provides a sheet assembly packaging body described in any one of the eighth to tenth aspects, in which two or more and three or less sheet packaging bodies are stacked in the longitudinal direction of the sheet packaging bodies so that one short side of one of the sheet packaging bodies faces the other short side of the other sheet packaging body.

[0034] In an eleventh aspect, in an assembly in which two or more and three or less sheet wrapping bodies are stacked so that one short side of one sheet wrapping body faces the other short side of the other sheet wrapping body in the longitudinal direction of the sheet wrapping bodies, compaction is also performed in the longitudinal direction of the sheet wrapping bodies where the sheet wrapping bodies overlap, so that in the eleventh aspect, it is possible to prevent the sheet assembly wrapping body from expanding in the longitudinal direction of the sheet wrapping bodies where the sheet wrapping bodies overlap.

[0035] A twelfth aspect of the present invention provides a sheet assembly packaging body described in any one of the eighth to eleventh aspects, in which two or more and three or less sheet packaging bodies are stacked in the short direction of the sheet packaging bodies so that one long side of one of the sheet packaging bodies faces the other long side of the other sheet packaging body.

[0036] In a twelfth aspect, an assembly of two to three sheet wrapping bodies is compacted in the short-side direction of the overlapping sheet wrapping bodies so that one long side of one sheet wrapping body faces the other long side of the other sheet wrapping body in the short-side direction of the sheet wrapping bodies. Therefore, in the twelfth aspect, it is possible to prevent the sheet assembly wrapping body from expanding in the short-side direction of the overlapping sheet wrapping bodies.

[0037] A thirteenth aspect of the present invention provides the sheet assembly package according to any one of the eighth to twelfth aspects, wherein the sheets contain a moisturizing agent.

[0038] In the thirteenth aspect, the volume of the sheet assembly packaging is 85% to 95% of the volume of the assembly before it is housed in the assembly packaging bag, so that even if the assembly of sheet packaging bodies housing a laminate of sheets containing a moisturizing agent is housed in a packaging bag in a tightened state, the sheets are less likely to be crushed and clogging or tearing of the sheets when removed can be prevented. Therefore, according to the thirteenth aspect, it is possible to provide a sheet assembly packaging body that achieves both compactness and suppression of a decrease in the ease of removal of the sheets, even for sheets containing a moisturizing agent. Effect of the Invention

[0039] According to one aspect of the present invention, it is possible to provide a sheet packaging body that is compact and prevents a decrease in ease of removal of sheets. [Brief description of the drawings]

[0040] [Figure 1] 1A and 1B are diagrams showing a sheet wrapping body and a mode for measuring hardness in the height direction thereof. [Diagram 2] 11A and 11B are diagrams showing a mode for measuring the hardness in the short direction of the sheet wrapping body. [Diagram 3] 11A and 11B are diagrams showing a mode for measuring the hardness of a sheet wrapping body in the longitudinal direction. [Figure 4] FIG. [Diagram 5] 11A and 11B are diagrams showing a manner in which the hardness of a sheet assembly package in the height direction is measured. [Figure 6] 13A and 13B are diagrams showing another manner of measuring the hardness in the height direction of the sheet assembly package. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In some cases, parts common to each drawing are given the same reference numerals and their explanations are omitted. In addition, the scale of each member in each drawing may differ from the actual scale.

[0042] In this specification, the directions of the drawings are described using a three-dimensional Cartesian coordinate system with three axial directions (X, Y, and Z directions). In each drawing, the left-right direction (the longitudinal direction of the sheet wrapping body or sheet assembly wrapping body) is the X direction, the front-rear direction (the lateral direction of the sheet wrapping body or sheet assembly wrapping body) is the Y direction, and the up-down direction (the height direction of the sheet wrapping body or sheet assembly wrapping body) is the Z direction.

[0043] In addition, in this specification, deviations in each direction are permitted to the extent that they do not impair the functions and effects of the embodiments. Furthermore, perpendicular may include substantially perpendicular.

[0044] <Sheet packaging> Fig. 1 is a diagram showing a sheet packaging body. The sheet packaging body 100 according to this embodiment has a sheet laminate SL and a packaging bag 10 (Fig. 1). In this embodiment, the sheet laminate SL is contained in the packaging bag 10 so that the stacking direction of the sheets constituting the sheet laminate SL is the height direction (Z direction). The sheet packaging body 100 is an example of the sheet packaging body according to this embodiment.

[0045] The sheet stack SL is made by stacking a plurality of sheets (or a plurality of sets of sheets (not shown). The shape of the sheet stack SL is a rectangular parallelepiped. The sheet stack SL is designed so that the sheets can be pulled out one by one (or one set by one) through an outlet (not shown) formed on the top surface 11 of the packaging bag 10.

[0046] The material of the sheet is not particularly limited, and may be, for example, paper, nonwoven fabric, or cloth, and is preferably tissue paper. When the sheet is tissue paper, the pulp composition may be a known composition for tissue paper. The blending ratio of pulp may be, for example, 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0047] The basis weight of the sheet is not particularly limited, but in the case of paper, it is 5 g / m depending on the number of plies. 2 More than 80g / m 2 less than 8 g / m 2 More than 50g / m 2 Less than 10 g / m 2 More than 20g / m 2 For nonwoven fabrics, the maximum is 20 g / m 2 More than 100g / m 2 The following is preferable. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0048] The thickness of the sheet is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be used. For example, when the sheet is a thin paper, the thickness of the thin paper is 40 μm or more and 500 μm or less per ply (two plies in the case of two plies), preferably 50 μm or more and 400 μm or less, more preferably 60 μm or more and 300 μm or less.

[0049] From the viewpoint of pulling out the sheets one by one or one set at a time, the sheet stack SL is preferably one in which the sheets are alternately stacked in a folded state (a so-called pop-up type sheet stack SL). Furthermore, the form of the sheet stack SL is not limited to one that can be pulled out in a pop-up type, and it may be one in which multiple sheets (or multiple sets) are simply stacked, or one in which each sheet is stacked in a folded state.

[0050] In addition, the dimensions of the sheet laminate SL can be such that the length in the longitudinal direction (X direction) of the sheet packaging body 100 is 155 mm or more and 230 mm or less, the length in the transverse direction or depth direction (Y direction) perpendicular to the longitudinal direction (X direction) of the sheet packaging body 100 is 80 mm or more and 120 mm or less, and the thickness in the height direction or thickness direction (Z direction) is 30 mm or more and 100 mm or less.

[0051] The form of the sheets constituting the sheet laminate SL is not particularly limited, and can be applied to, for example, sanitary thin paper such as tissue paper, toilet paper, kitchen paper, paper towels, etc. Sheets such as tissue paper and paper towels also include sheets containing moisturizing ingredients (or moisturizing agents) (for example, lotion tissue, etc.). The use of the sheets is also not particularly limited, and can be applied to any of industrial, household, and portable uses. Among these, it is preferably used for household tissue paper.

[0052] In addition, when the sheet contains a moisturizing agent, a component having a function of taking in water into the paper by hygroscopicity and increasing the moisture content (moisture retention function) is used as the moisturizing agent. An example of such a component having a moisture retention function is polyol.

[0053] Examples of polyols include glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose, etc., which may be used alone or in combination of two or more. Among these, glycerin and diglycerin are preferred.

[0054] The method for manufacturing the sheet stack SL is not particularly limited. For example, the sheet stack SL can be manufactured using a rotary interfolder, a multi-stand interfolder (a device that folds sheets with a single folding plate and stacks them alternately to manufacture a web), etc. Note that the multi-stand interfolder has a high sheet supplying capacity.

[0055] In the sheet stack SL manufactured using the multi-stand type interfolder, the sheets are stacked so that the direction in which the sheets are pulled out is the MD direction (the flow direction of the fibers that make up the sheets). That is, the movement direction of the sheets when they are pulled out from the outlet of the sheet packaging body 100 is the MD direction. The movement direction of the sheets is also the MD direction in the state of the sheet stack SL inside the sheet packaging body 100.

[0056] In addition, in the sheet stack SL manufactured using the rotary interfolder, the sheets are stacked so that the direction in which the sheets are pulled out is the CD direction (perpendicular to the MD direction). That is, the movement direction of the sheets when they are pulled out from the outlet of the sheet wrapping body 100 is the CD direction. The movement direction of the sheets is also the CD direction in the state of the sheet stack SL inside the sheet wrapping body 100.

[0057] In addition, when the sheet laminate SL stacked in the multi-stand type interfolder is rectangular, the pair of long sides of the sheet laminate SL viewed in the longitudinal direction (X direction) from one short side of the sheet laminate SL tend to become misaligned (the folds of the sheets tend to shift in the stacking direction (Z direction)). On the other hand, the multi-stand type interfolder has a high sheet supply capacity, so it can improve the productivity of the sheet laminate, the sheet packaging that contains the sheet laminate, and the sheet assembly packaging that contains multiple sheet packaging.

[0058] In addition, when a sheet stack is stacked in a rotary interfolder and the sheet stack is rectangular, a pair of long sides of the sheet stack when viewed in the longitudinal direction (X direction) from one short side of the sheet stack tend to align (the folds of the sheets are less likely to shift in the stacking direction).

[0059] The packaging bag 10 contains the sheet laminate SL.

[0060] The packaging bag 10, with the sheet laminate SL contained therein, has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, side surfaces 15, and side surfaces 16. In the packaging bag 10, the top surface 11 and the bottom surface 12 face each other in the up-down direction (Z direction), the front surface 13 and the back surface 14 face each other in the front-rear direction (Y direction), and the side surfaces 15 and 16 face each other in the left-right direction (X direction). The side surfaces 15 and 16 are continuous with all of the top surface 11, the bottom surface 12, the front surface 13, and the back surface 14 (see FIG. 1).

[0061] The sheet laminate SL contained in the packaging bag 10 has a top surface, a bottom surface, a pair of long sides, and a pair of short sides that face the top surface 11, bottom surface 12, front surface 13, back surface 14, side surfaces 15, and side surfaces 16 of the packaging bag 10, respectively.

[0062] A take-out opening (not shown) is provided on the top surface 11 of the packaging bag 10. The take-out opening is configured so that the sheet can be pulled out. The take-out opening is configured as an opening. The opening that configures the take-out opening may be configured by breaking a perforation (intermittent cut).

[0063] The shape of the opening constituting the outlet is gourd-shaped or dumbbell-shaped in plan view. An outlet that is gourd-shaped or dumbbell-shaped in plan view has a shape in which the width of the center of the outlet is narrower than the width of both ends of the outlet. The shape of the center of the outlet is not particularly limited, but may be, for example, a long and narrow rectangle. The shapes of both ends of the outlet are not particularly limited, but may be, for example, a circle, a sector, etc.

[0064] The width of the center part of the outlet (width in the Y direction) is not particularly limited, but is preferably 1 mm or more and 10 mm or less, more preferably 3 mm or more and 8 mm or less, and more preferably 4 mm or more and 6 mm or less.

[0065] The width of both ends of the outlet (maximum width in the Y direction) is not particularly limited, but is preferably 5 mm or more and 40 mm or less, more preferably 10 mm or more and 37 mm or less, and more preferably 15 mm or more and 35 mm or less.

[0066] The ratio of the width of the center of the outlet (width in the Y direction) to the width of both ends of the outlet (maximum width in the Y direction) is not particularly limited, but is preferably 5% or more and 40% or less, more preferably 10% or more and 35% or less, and even more preferably 15% or more and 30% or less.

[0067] The width of both ends of the take-out opening (maximum width in the Y direction) is relative to the width of the top surface 11 of the packaging bag 10 of the sheet packaging body 100 in the short direction (Y direction). 10 % or more and 40% or less, preferably 20 % or more and 35% or less, more preferably 25 % or more and 30% or less.

[0068] The total length of the outlet in the longitudinal direction (X direction) is not particularly limited, and is, for example, 20% or more and 90% or less of the total length in the longitudinal direction (X direction) of the top surface 11 of the packaging bag 10 of the sheet packaging body 100, preferably 25% or more and 85% or less, and more preferably 30% or more and 80% or less.

[0069] The ratio of the length of the central part of the outlet in the longitudinal direction (X direction) to the entire length of the outlet in the longitudinal direction (X direction) is not particularly limited, but is preferably 10% or more and 50% or less, more preferably 15% or more and 40% or less, and even more preferably 20% or more and 30% or less.

[0070] The ratio of each of the lengths of both ends of the outlet in the longitudinal direction (X direction) to the total length of the outlet in the longitudinal direction (X direction) is not particularly limited, but is preferably 5% or more and 45% or less, more preferably 10% or more and 30% or less, and even more preferably 15% or more and 25% or less.

[0071] The packaging bag 10 is made of a resin film. The resin film constituting the packaging bag 10 is flexible. The resin used for the resin film is not particularly limited, and for example, 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. As the polyethylene, high density polyethylene, low density polyethylene, etc. can be used.

[0072] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferred because they are flexible, easy to handle, have high sealability when heat sealed, and are inexpensive. Polyethylene is also preferred because it is odorless, has excellent water resistance and chemical resistance, and can be mass-produced at low cost. Polypropylene is also preferred because it is robust, easy to mold, has good color development when printed, and can be given a glossy finish.

[0073] The materials used to form the packaging bag 10 can be biodegradable materials (biodegradable plastics such as polylactic acid) or biomass materials (renewable organic resources derived from living organisms, such as biomass films, excluding fossil resources).

[0074] The form of the resin film forming the packaging bag 10 is not particularly limited, and may be a single-layer film formed of a single layer of the above-mentioned resin, a laminate film in which the above-mentioned resin is laminated, a film in which the above-mentioned resin is bonded or laminated with pulp paper or nonwoven fabric, or a mixed film formed from a mixture of two or more of the above-mentioned resins.

[0075] The thickness of the resin film forming the packaging bag 10 is not particularly limited, and is preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 70 μm or less. By making the thickness of the resin film 20 μm or more, it is possible to ensure sufficient strength for the packaging bag 10 in which the sheet is contained. Furthermore, by making the thickness of the resin film 100 μm or less, it is possible to ensure the flexibility and light weight of the packaging bag 10 and to reduce costs.

[0076] The packaging form of the packaging bag 10 is not particularly limited. In this embodiment, for example, packaging in which both ends of a cylindrical resin film are folded and sealed (caramel packaging), packaging in which both ends or either one of the ends of a cylindrical resin film folded in a gusset shape are sealed (pillow packaging), packaging in which a heat-shrinkable resin film is heated and adhered to the packaged object (shrink packaging), or a combination of these may be used. Among these, caramel packaging is preferred because it is easy to control the compaction of the sheet laminate SL (see FIG. 1).

[0077] In caramel packaging, the sheet laminate SL is wrapped in a resin film by rolling it into a cylinder with both ends in the longitudinal direction (X direction) open, and the overlapping parts in the rolling direction are bonded by a fusion process or adhesive. Next, both ends in the longitudinal direction (X direction) of the cylindrical resin film are folded toward the end face side of the sheet laminate SL, and at least the leading edge portions of the approximately triangular or approximately trapezoidal pieces formed in this process are overlapped and bonded by a fusion process or adhesive to seal the opening of the cylinder. In this embodiment, both ends of the cylindrical resin film (sides 15 of the packaging bag 10, 16 ) is folded and sealed (see Figure 1).

[0078] In the sheet packaging body 100, the sheet laminate SL is contained in a packaging bag 10 in a tightened state. Specifically, the sheet laminate SL is subjected to compaction (compression) so that the volume of the sheet packaging body 100 is 90% or more and 99% or less, preferably 91% or more and 98% or less, and more preferably 92% or more and 97% or less of the volume of the sheet laminate SL before being contained in the packaging bag 10.

[0079] The compaction at this time is such that the hardness RH in the height direction (Z direction) of the sheet wrapping body 100 is preferably 4% or more and 10% or less, more preferably 4% or more and 8% or less, and further preferably 4% or more. 6 % or less.

[0080] Here, the hardness RH of the sheet wrapping body 100 in the height direction (Z direction) is measured by a compression tester (Kato Tech Co., Ltd., KES-G5) at the center of the upper surface of the sheet wrapping body 100, with the sheet wrapping body 100 placed so that the stacking direction of the sheet stack SL is perpendicular to the ground, as shown in FIG. 2 (Early detection 1.0gf / 2cm 2 ) is applied, the ratio [(AH-BH) / (AH)] × 100(%) of the difference (AH-BH) between the length before load (AH) and the length after load (BH) to the length before load (AH) in the vertical direction (H1 direction) of the sheet packaging body 100.

[0081] The compaction is adjusted so that the hardness RS of the sheet wrapping body 100 in the short direction (Y direction) is preferably 2% to 5%, more preferably 2% to 4%, and even more preferably 2% to 3%.

[0082] Here, the hardness RS of the sheet wrapping body 100 in the short side direction (Y direction) is measured by a compression tester (Kato Tech Co., Ltd., KES-G5) at the center of the upper surface of the sheet wrapping body 100, with the short side direction of the sheet laminate SL being perpendicular to the ground, as shown in FIG. 2. 2 (Early detection 1.0gf / 2cm2 The figure shows the ratio of the difference (AS-BS) between the length before load (AS) and the length after load (BS) to the length before load (AS) in the vertical direction (D1 direction) of the sheet packaging body 100 when a load of 100 mm (AS-BS) is applied [(AS-BS) / (AS)] × 100 (%).

[0083] Furthermore, the compaction is adjusted so that the hardness RL in the longitudinal direction (X direction) of the sheet wrapping body 100 is preferably 0.1% to 4%, more preferably 0.5% to 3%, and even more preferably 1% to 2.5%.

[0084] Here, the hardness RL of the sheet wrapping body 100 in the longitudinal direction (X direction) is, as shown in FIG. 3, measured by a compression tester (KES-G5, manufactured by Kato Tech Co., Ltd.) at the terminal W1 in the center of the upper surface of the sheet wrapping body 100 in a state in which the sheet wrapping body 100 is placed so that the longitudinal direction of the sheet laminate SL is perpendicular to the ground. 2 (Early detection 1.0gf / 2cm 2 When a load of A ) is applied, the length (A ) of the sheet wrapping body 100 in the vertical direction (L1 direction) before the load is applied L ) to the length before loading (A L ) and length after loading (B L ) difference (A L -B L ) ratio [(A L -B L ) / (A L )] × 100 (%).

[0085] In the sheet packaging body 100 of this embodiment, the volume of the sheet packaging body 100 is 90% or more and 99% or less of the volume of the sheet laminate SL before being contained in the packaging bag 10, so that the sheets are less likely to be crushed and can be prevented from becoming clogged or torn even if the sheet laminate SL is contained in a tightened state in the packaging bag 10. Therefore, according to this embodiment, it is possible to provide a sheet packaging body 100 that is both compact and prevents a decrease in the ease of removing the sheets.

[0086] In this embodiment, the hardness RH of the sheet packaging body 100 in the height direction (Z direction) is 4% or more and 10% or less, so that the sheet can be prevented from being crushed in the packaging bag 10. Therefore, according to this embodiment, it is possible to prevent a decrease in the ease of removing the sheet.

[0087] In this embodiment, the hardness RS of the sheet packaging body 100 in the short side direction (Y direction) is 2% or more and 5% or less, so that the sheet can be prevented from being crushed in the packaging bag 10. Therefore, according to this embodiment, it is possible to prevent a decrease in the ease of removing the sheet.

[0088] In this embodiment, the stiffness RL of the sheet packaging body 100 in the longitudinal direction (X direction) is 0.1% or more and 4% or less, so that the sheet can be prevented from being crushed in the packaging bag 10. Therefore, according to this embodiment, it is possible to prevent a decrease in the ease of removing the sheet.

[0089] In this embodiment, the top surface of the sheet packaging body 100 in the longitudinal direction (X direction) Top The length of the take-out opening is set to 20% or more and 90% or less of the length of the sheet wrapping body 100 in the short direction (Y direction), and the top surface (of the packaging bag 10) in the short direction (Y direction) of the sheet wrapping body 100 is set to 20% or more and 90% or less of the length of the take-out opening. Top By making the width of the take-out opening 20% ​​or more and 40% or less of the width of the sheet stack 11), the sheet is less likely to get stuck in the take-out opening. Therefore, according to this embodiment, even if the sheet stack SL is contained in the packaging bag 10 in a tightened state, it is possible to prevent a decrease in the ease of taking out the sheet.

[0090] In this embodiment, the shape of the take-out opening is gourd-shaped or dumbbell-shaped in plan view, so that the take-out opening is less likely to become clogged when the sheet is pulled out, and this can prevent the sheet from being torn or the sheet packaging body 100 from being lifted up. Therefore, even if the sheet stack SL is contained in the packaging bag 10 in a tightened state, it is possible to prevent a decrease in the ease of taking out the sheet.

[0091] In this embodiment, the volume of the sheet packaging body 100 is 90% or more and 99% or less of the volume of the sheet laminate SL before being contained in the packaging bag 10, so that even if a laminate of sheets containing a moisturizing agent (sheet laminate SL) is contained in a tightened state in the packaging bag 10, the sheets are unlikely to be crushed, and clogging or tearing of the sheets during removal can be prevented. Therefore, according to the embodiment, it is possible to provide a sheet packaging body 100 that achieves both compactness and suppression of a decrease in the ease of removal of the sheets, even for sheets containing a moisturizing agent.

[0092] <Sheet assembly packaging> 4 is a diagram showing a sheet assembly packaging body. The sheet assembly packaging body 200 has a collective packaging bag 50 and an assembly 70. The collective packaging bag 50 contains the assembly 70.

[0093] The collective packaging bag 50, with the assembly 70 contained therein, has a top surface 51, a bottom surface 52, a front surface 53, a back surface 54, and side surfaces 55 and 56. In the collective packaging bag 50, the top surface 51 and the bottom surface 52 face each other in the up-down direction (Z direction), the front surface 53 and the back surface 54 face each other in the front-rear direction (Y direction), and the side surfaces 55 and 56 face each other in the left-right direction (X direction). The side surfaces 55 and 56 are continuous with all of the top surface 51, the bottom surface 52, the front surface 53, and the back surface 54 (see FIG. 4).

[0094] A handle 60 is provided on the top surface 51 of the collective packaging bag 50. The handle 60 is provided with an opening (not shown) for hanging fingers. The handle 60 is formed integrally with the collective packaging bag 50, and can be turned from a state where it is laid down on the top surface 51 of the collective packaging bag 50 to a standing state when the user grasps the handle 60 (FIG. 4).

[0095] The collective packaging bag 50 is made of a resin film. The resin film constituting the collective packaging bag 50 is flexible. The resin used for the resin film is not particularly limited, and examples of resins that can be used include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), and the like.

[0096] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferred because they are flexible and easy to handle, have high sealability when heat sealed, are inexpensive, etc. Polyethylene is also preferred because it is odorless, has excellent water resistance and chemical resistance, and can be mass-produced at low cost.

[0097] As the polyethylene, high density polyethylene, low density polyethylene, etc. can be used. Moreover, polypropylene is preferable from the viewpoints of being robust, easy to mold, good color development when printed, and ability to impart gloss.

[0098] In addition, the materials used to form the collective packaging bag 50 can be biodegradable materials (biodegradable plastics, etc.) and biomass materials (renewable organic resources derived from living organisms, such as biomass films, excluding fossil resources).

[0099] The form of the resin film forming the collective packaging bag 50 is not particularly limited, and may be a monolayer 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.

[0100] The thickness of the resin film forming the collective packaging bag 50 is not particularly limited, and is preferably 20 μm to 100 μm, more preferably 25 μm to 70 μm. By making the thickness of the resin film 20 μm or more, it is possible to ensure sufficient strength for the collective packaging bag 50 in which the assembly 70 of the sheet wrapping bodies 100 is contained. In addition, by making the thickness of the resin film 100 μm or less, it is possible to ensure flexibility and light weight of the collective packaging bag 50 and reduce costs.

[0101] The packaging form of the collective packaging bag 50 is not particularly limited. For example, packaging in which both ends or one of the ends of a cylindrical resin film folded in a gusset shape are sealed (gusset packaging or pillow packaging), packaging in which both ends or one of the ends of a cylindrical resin film are folded and glued or sealed (caramel packaging), packaging in which a heat-shrinkable resin film is heated to make it adhere to the packaged object (shrink packaging), or a combination of these may be adopted. Among these, gusset packaging is preferred because it is easy to control the compaction of the aggregate 70 contained in the collective packaging bag 50.

[0102] The assembly 70 is formed by stacking a plurality of the above-mentioned sheet wrapping bodies 100. In this embodiment, the plurality of sheet wrapping bodies 100 are stacked so that the height direction of the sheet wrapping body 100 corresponds to the horizontal direction (X direction) of the sheet assembly wrapping body 200, and the longitudinal direction of the sheet wrapping body 100 corresponds to the height direction (Z direction) of the sheet assembly wrapping body 200. 、 This constitutes an assembly 70 (FIG. 4). The number of sheet wrapping bodies 100 constituting the assembly 70 is not limited, and may be two or more.

[0103] The assembly 70 may be formed by stacking two to ten sheet wrapping bodies 100 in the height direction of the sheet wrapping bodies 100, with the bottom surface 12 of one sheet wrapping body 100 facing the top surface 11 of the other sheet wrapping body 100 (Figure 4).

[0104] Specifically, five sheet packaging bodies 100 are lined up in the horizontal direction (X direction) of the sheet assembly packaging body 200 so that the bottom surface 12 of the packaging bag 10 of one adjacent sheet packaging body 100 faces the top surface 11 of the packaging bag 10 of the other sheet packaging body 100 (Figures 1 and 4).

[0105] The assembly 70 may be stacked in a single row or in two or more rows in the longitudinal direction of the sheet wrapping body 100. When the assembly 70 is stacked in two or more rows in the longitudinal direction of the sheet wrapping body 100, it is preferable to stack two to three sheet wrapping bodies 100 so that one short side surface 16 of one sheet wrapping body 100 faces the other short side surface 15 of the other sheet wrapping body.

[0106] Specifically, two sheet packaging bodies 100 are overlapped in the height direction (Z direction) of the sheet assembly packaging body 200 so that a short side 16 of the packaging bag 10 of one of the overlapping sheet packaging bodies 100 faces a short side 15 of the packaging bag 10 of the other sheet packaging body 100 (Figures 1 and 4).

[0107] The assemblies 70 may be stacked in a single row or in two or more rows in the short side direction of the sheet wrapping body 100. When the assemblies 70 are stacked in two or more rows in the short side direction of the sheet wrapping body 100, one long side surface 14 of one sheet wrapping body 100 faces the other long side surface of the other sheet wrapping body. 13 It is preferable to stack two or more and three or less sheet wrapping bodies 100 so that they face each other.

[0108] Specifically, two sheet packaging bodies 100 are overlapped in the height direction (Z direction) of the sheet assembly packaging body 200 so that the long side 14 of the packaging bag 10 of one of the overlapping sheet packaging bodies 100 faces the long side 13 of the packaging bag 10 of the other sheet packaging body 100 (Figure 1).

[0109] In the sheet assembly packaging body 200, the assembly 70 is contained in a fastened state in the assembly packaging bag 50. Specifically, the volume of the sheet assembly packaging body 200 is 85% to 95%, preferably 86% to 94%, of the volume of the assembly 70 before being contained in the assembly packaging bag 50. 、 More preferably, compaction is performed so that the density becomes 87% or more and 93% or less.

[0110] The compaction at this time is adjusted so that the hardness ARH in the height direction (L2 direction) of the sheet assembly packaging body 200 is 2% to 6%, more preferably 2.5% to 5.5%, and even more preferably 3% to 5%. Note that the height direction (L2 direction) of the sheet assembly packaging body 200 when measuring the hardness ARH is a direction perpendicular to the height direction (H2 direction) when the sheet assembly packaging body 200 is held by the handle 60.

[0111] Where: Sheet assembly package 200 The stiffness ARH in the height direction (L2 direction) of the sheet packaging body 100 is the ratio [(AB) / (A)] × 100 (%) of the difference (AB) between the height before load (A) and the height after load (B) of the sheet packaging body 200 when a weight W2 is placed on the top surface (side surface 55 of the collective packaging bag 50) of the sheet packaging body 200, which contains an assembly 70 in which five sheet packaging bodies are stacked in the height direction of the sheet packaging body 100, to the height before load (A) of the sheet packaging body 200 when the sheet packaging body 200 is loaded with a weight W2, as shown in Figures 5 and 6.

[0112] Specifically, the state in which an acrylic plate B with marks (not shown) is placed on four places on the top surface (side surface 55 of collective packaging bag 50) of the sheet assembly packaging body 200 is defined as the state before loading the sheet assembly packaging body 200, and the state in which a weight W2 of 500 g (or a load equivalent to five sheet packaging bodies 100) is placed on the center of the top surface of the acrylic plate B and 10 minutes have passed is defined as the state after loading the sheet assembly packaging body 200. Then, the hardness ARH is calculated by applying the average of the heights before loading and the average of the heights after loading at the four marked places to the above formula (FIGS. 5 and 6).

[0113] In the sheet assembly packaging body 200 of this embodiment, the volume of the sheet assembly packaging body 200 is 85% to 95% of the volume of the assembly 70 before it is contained in the collective packaging bag 50, so that even if the assembly 70 is contained in a tightened state in the collective packaging bag 50, the sheets are unlikely to be crushed in each sheet packaging body 100, and clogging and tearing of the sheets can be prevented. Therefore, according to the eighth aspect, it is possible to provide a sheet assembly packaging body that is both compact and prevents a decrease in ease of removal of the sheets.

[0114] In this embodiment, the hardness ARH in the height direction (L2 direction) of the sheet assembly packaging body 200 is 2% or more and 6% or less, so that the sheet packaging body 100 is prevented from being crushed in the assembly packaging bag 50, and further, the sheets of each sheet packaging body 100 are prevented from being crushed in the packaging bag 10. Therefore, according to this embodiment, it is possible to prevent a decrease in the ease of removing the sheets.

[0115] In this embodiment, an assembly 70 in which 2 to 10 sheet wrapping bodies 100 are accumulated in a height direction (X direction in FIG. 4) of the sheet wrapping bodies 100 such that the bottom surface (bottom surface 12 of the packaging bag 10) of one sheet wrapping body 100 faces the top surface (top surface 11 of the packaging bag 10) of the other sheet wrapping body 100, is also subjected to compaction in the height direction of the sheet wrapping bodies 100 where the sheet wrapping bodies 100 overlap. Therefore, in this embodiment, it is possible to prevent the sheet assembly wrapping body 200 from expanding in the height direction (X direction in FIG. 4) of the sheet wrapping bodies 100 where the sheet wrapping bodies 100 overlap.

[0116] In this embodiment, an assembly in which two to three sheet wrapping bodies 100 are piled up in the longitudinal direction (Z direction in FIG. 4) of the sheet wrapping bodies 100 so that one short side surface (short side surface 16 of the packaging bag 10) of one sheet wrapping body 100 faces the other short side surface (short side surface 15 of the packaging bag 10) of the other sheet wrapping body 100, is also subjected to compaction in the longitudinal direction (Z direction in FIG. 4) of the sheet wrapping bodies 100 where the sheet wrapping bodies 100 overlap. Therefore, in this embodiment, it is possible to prevent the sheet assembly wrapping body 200 from expanding in the longitudinal direction of the sheet wrapping bodies 100 where the sheet wrapping bodies 100 overlap.

[0117] In this embodiment, in the short direction of the sheet packaging body 100, one long side surface of one sheet packaging body 100 (long side surface 14 of the packaging bag 10) is aligned with the other long side surface of the other sheet packaging body 100 (long side surface 13In the assembly 70 in which two to three sheet wrapping bodies 100 are accumulated so that the sheet wrapping bodies 100 face each other, compaction is also performed in the short side direction of the sheet wrapping bodies 100 where the sheet wrapping bodies 100 overlap. Therefore, in this embodiment, it is possible to prevent the sheet assembly wrapping body 200 from expanding in the short side direction of the sheet wrapping bodies 100 where the sheet wrapping bodies 100 overlap.

[0118] In this embodiment, the volume of the sheet assembly packaging body 200 is 85% or more and 95% or less of the volume of the assembly 70 before being accommodated in the assembly packaging bag 50, so that the assembly 70 of the sheet packaging body 100 accommodating the layered body SL of sheets containing a moisturizing agent can be packed in a fastened state. Group packaging bag 50 Therefore, according to the present embodiment, it is possible to provide a sheet assembly package 200 that is compact and prevents the sheets from being easily removed, even when the sheets contain a moisturizing agent. EXAMPLES

[0119] The present invention will now be described in more detail with reference to examples. The evaluations of the examples and comparative examples were carried out under the following conditions. The conditions and evaluation results of the examples and comparative examples are shown in Tables 1 to 3.

[0120] [Sheet packaging (individually wrapped)] A sheet package 100 (hereinafter sometimes referred to as a film pack or pack) was prepared by caramel-packing tissue paper (dimensions: height (Z direction) approximately 58 mm, width (X direction) approximately 180 mm, length (Y direction) approximately 101 mm, weight approximately 120 g) in which sheets containing moisturizers were folded alternately as a sheet laminate SL (web) and stacked so that they could be pulled out one by one in a pop-up style (see Figure 1). The tissue paper was made of a laminated polyethylene film approximately 62 μm thick and had a packaging bag 10 with an opening formed on the top surface 11.

[0121] The sheets containing the moisturizing agent were extracted by the Soxhlet extraction method using a Soxhlet extractor with a mixed solvent of acetone and ethanol (acetone:ethanol = 1:1 by volume) under reflux for 4 hours. The amount of the moisturizing agent attached was measured as the attached amount (g / m 2 The amount of moisturizer contained in the tissue paper is not necessarily limited, but is preferably 10% by mass to 30% by mass, more preferably 15% by mass to 28% by mass, and even more preferably 20% by mass to 26% by mass. In Table 1, "%" is based on mass.

[0122] The ratio of the width (length in the longitudinal direction) of the outlet is taken out opening width (length in the longitudinal direction) ÷ pack width ( Long The ratio of the width (length in the short direction) was calculated based on the formula: depth of removal opening ÷ pack depth × 100, and the ratio to the top surface was calculated based on the formula: area of ​​removal opening ÷ area of ​​top surface × 100.

[0123] [Compactness rate of sheet packaging] The volume Vw of the sheet laminate SL was calculated based on the formula: width L x maximum depth T x height H1. The volume Vw of the sheet laminate SL is the volume 2 hours after the web is removed from the sheet packaging body 100. The volume VC of the film pack was calculated based on the formula: width (length in the longitudinal direction) x maximum depth (length in the transverse direction) x height. Furthermore, the ratio of the volume of the film pack to the web was calculated based on the formula: volume Vw of the web laminate ÷ volume VC of the film pack x 100.

[0124] [Hardness of the sheet packaging] The average, maximum, and minimum values ​​of hardness (RH, RS, RL) in the height direction (Z direction), width direction (Y direction), and length direction (X direction) of the sheet packaging body (individually packaged body) were measured. The number of samples was 5. A compression tester (KES-G5, manufactured by Kato Tech Co., Ltd.) was used as the measuring device, and measurements were made under the following conditions. Sample: Cloth, film, etc. SENS:2 Force gauge type: 1kg SPEED RANGE: 0.1cm / s DEF Sensitivity: 20mm / 10V Pressurized area: 2cm 2 Capture interval: 0.100 Measurement load: 10 Maximum load: 100gf / 2cm 2

[0125] The hardness (RH) in the height direction (Z direction) of the sheet packaging was measured by placing the sheet packaging so that the stacking direction (Z direction) of the sheet laminate SL was perpendicular to the ground, and the terminal W1 of the compression tester was initially detected (1 gf / 2 cm 2 ) to the upper load (100gf / 2cm 2 ) is loaded, the difference between the height before loading (initial height T0) and the length after loading (TM) (indentation amount DS: T0-TM) in relation to the height before loading [mm] in the vertical direction (Z direction) of the sheet packaging is calculated as [DS / D] x 100 (%) (see Figure 1). Hardness (RH) is calculated as: 4 % or more and 10% or less, the compactness was evaluated as good, and when it was outside the range of 4% or more and 10% or less, the compactness was evaluated as poor.

[0126] The hardness (RS) of the short side (Y direction) of the sheet packaging was measured by placing the sheet packaging so that the short side (Y direction) was perpendicular to the ground, and the terminal W1 of the compression tester was initially detected (1gf / 2cm 2 ) to the upper load (100gf / 2cm 2 ) when the sheet packaging is loaded in the vertical direction ( Y The ratio [DS / H] x 100 (%) of the difference between the length before loading (initial height T0) and the length after loading (TM) (indentation amount DS: T0-TM) to the length before loading [mm] in the direction (see Figure 2) is calculated (see Figure 2). For hardness (RS), compactness was evaluated as good when it was between 2% and 5%, and as poor when it was outside the range of 2% and 5%.

[0127] The stiffness (RL) of the sheet packaging in the longitudinal direction (X direction) is calculated by dividing the sheet packaging in the longitudinal direction ( X With the sheet package placed so that its surface (direction) is perpendicular to the ground, the terminal W1 of the compression tester is initially detected (1gf / 2cm) at the center of the top surface of the sheet package. 2 ) to the upper load (100gf / 2cm 2 ) when the sheet packaging is loaded in the vertical direction ( X The ratio [DS / H] x 100 (%) of the difference between the length before loading (initial height T0) and the length after loading (TM) (indentation amount DS: T0-TM) to the length before loading [mm] in the direction (see Figure 3) is calculated (see Figure 3). For hardness (RL), if it was between 0.1% and 4%, the compactness was evaluated as good, and if it was outside the range of 0.1% and 4%, the compactness was evaluated as poor.

[0128] [Sheet assembly packaging] The sheet assembly packaging body 200 is prepared by pillow-packaging ten sheet packaging bodies 100 (five sheet packaging bodies 100 arranged in the horizontal direction (X direction) of the sheet assembly packaging body 200 such that the bottom surface 12 of the packaging bag 10 of one of the adjacent sheet packaging bodies 100 faces the top surface 11 of the packaging bag 10 of the other sheet packaging body 100, and two sheet packaging bodies 100 overlapping each other in the height direction (Z direction) of the sheet assembly packaging body 200 such that the short side surface 16 of the packaging bag 10 of one of the overlapping sheet packaging bodies 100 faces the short side surface 15 of the packaging bag 10 of the other sheet packaging body 100) in an assembly packaging bag 50 formed of a polyethylene film having a thickness of approximately 35 μm (see FIG. 4).

[0129] [Compactness rate of sheet assembly packaging] The volume VP of the film pack assembly package was calculated based on the formula: width dimension (horizontal length) x maximum depth (front-rear length) x height. Furthermore, the ratio of the volume of the sheet assembly package to the volume of the sheet package was calculated based on the formula: film pack volume VC ÷ film pack assembly package volume VP x 100.

[0130] [Hardness of sheet assembly packaging] The hardness ARH in the height direction (L2 direction) of the sheet assembly packaging body 200 was measured. In measuring the hardness ARH, a mark was made at the center of each of the four sides of an acrylic plate B having a thickness (Z direction) of 3 mm, a length (Y direction) of 165 mm, and a width (X direction) of 320 mm. top surface (side surface 55 of collective packaging bag 50), and the height from the bottom surface (56 of collective packaging bag 50) of sheet collective packaging body 200 (collective packaging bag 50) to four points on acrylic plate B was measured, and the average value of the heights up to the four points was determined as the height before loading. difference A weight W2 weighing 500 g (or a load equivalent to five sheet wrapping bodies 100) is placed on the center of the acrylic plate B, and after 10 minutes, the height from the bottom surface (56 of the collective wrapping bag 50) of the sheet collective wrapping body 200 (collective wrapping bag 50) to four points on the acrylic plate B is measured, and the average value of the heights up to the four points is defined as the height after loading. L2 The indentation amount DH is calculated by subtracting the height after loading L2 from the height before loading. The hardness ARH is calculated as (indentation amount DH / height before loading) x 100. When the hardness ARH was between 2% and 6%, the compactness was evaluated as good, and when it was outside the range of between 2% and 6%, the compactness was evaluated as poor.

[0131] [Extraction resistance value] A jig (double clip CP-103, manufactured by PLUS Corporation) was attached to the sheet end of the sheet packaging body 100 that was visible from the take-out opening, and the sheet was pulled out vertically using a push-pull gauge (digital force gauge Z2-20N, manufactured by IMADA Co., Ltd.), and the resistance value (peak) during pulling was measured. Measurements were taken 10 times for the first to tenth sets, and the average value was calculated as the take-out resistance value. When the take-out resistance value was less than 2, the take-out property was evaluated as good, and when the average value of the take-out resistance value was 2 or more, the take-out property was evaluated as poor.

[0132] [Table 1]

[0133] [Table 2]

[0134] [Table 3]

[0135] From Tables 1 to 3, it was found that a sheet package whose volume is 90% or more and 99% or less of the volume of the sheet laminate before being placed in a packaging bag, and a sheet assembly package whose volume is 85% or more and 95% or less of the volume of the assembly before being placed in a packaging bag, can achieve both compactness and suppression of a decrease in the ease of removing sheets (Examples 1 to 8).

[0136] On the other hand, it was found that sheet packaging bodies whose volume is outside the range of 90% or more and 99% or less of the volume of the sheet laminate before it is contained in a packaging bag, and sheet assembly packaging bodies whose volume is outside the range of 85% or more and 95% or less of the volume of the assembly before it is contained in a packaging bag, are unable to achieve both compactness and suppression of reduced sheet removal ability (Comparative Examples 1 to 4).

[0137] Although an embodiment of the present invention has been described above, the present invention is not limited to a specific embodiment, and various modifications and changes are possible within the scope of the invention described in the claims. [Explanation of symbols]

[0138] 100 Sheet packaging SL Sheet laminate 10 packaging bags 11 Top 12 Bottom 13 Long side 14 Long side 15 short side 16 short side W1 Compression Tester Terminal 200 Sheet assembly packaging 50 collective packaging bags 51 Top 52 Bottom 53 Front 54 Back 55 Side 56 Side 70 Aggregate W2 Weight

Claims

1. A sheet package including a rectangular parallelepiped sheet laminate in which a plurality of sheets are laminated, a packaging bag made of a resin film for accommodating the sheet laminate, and an outlet formed on a top surface of the packaging bag for pulling out the sheets, The sheet stack is formed by stacking the sheets such that the long sides of the sheet stack are irregular. The sheet packaging body is contained in the packaging bag in a state where the sheet stack is fastened in a direction in which the misaligned long sides face each other, The volume of the sheet wrapping body is 90% or more and 99% or less of the volume of the sheet laminate before being contained in the packaging bag, The sheet wrapping body has a short-side hardness RS of 2% or more and 3% or less.

2. The sheet packaging body according to claim 1 , wherein the stiffness RH of the sheet packaging body in the height direction is 4% or more and 10% or less.

3. The sheet packaging body according to claim 1 , wherein the stiffness RL of the sheet packaging body in the longitudinal direction is 0.1% or more and 4% or less.

4. In the longitudinal direction of the sheet wrapping body, the length of the outlet is 20% or more and 90% or less of the length of the top surface, The sheet packaging body according to claim 1 , wherein the width of the outlet port is 20% to 40% of the width of the top surface in the short side direction of the sheet packaging body.

5. The sheet packaging body according to claim 1 , wherein the outlet opening has a gourd shape or a dumbbell shape in a plan view.

6. The sheet packaging body according to claim 1 , wherein the sheet contains a moisturizing agent.

7. An assembly in which a plurality of the sheet packaging bodies according to claim 1 are accumulated; A sheet assembly packaging body having a resin film assembly packaging bag for containing the assembly, The sheet assembly packaging body is a body of the sheet assembly that is contained in the assembly packaging bag in a fastened state, The volume of the sheet assembly packaging body is 85% or more and 95% or less of the volume of the assembly before it is contained in the assembly packaging bag.

8. The sheet assembly packaging body according to claim 7 , wherein the stiffness ARH of the sheet assembly packaging body in the height direction is 2% or more and 6% or less.

9. The sheet assembly packaging body according to claim 7, wherein the assembly is formed by stacking two or more and ten or less sheet packaging bodies in the height direction of the sheet packaging bodies so that the bottom surface of one of the sheet packaging bodies faces the top surface of the other sheet packaging body.

10. The sheet assembly packaging body according to claim 7, wherein two or more and three or less sheet packaging bodies are stacked in the longitudinal direction of the sheet packaging bodies so that one short side of one of the sheet packaging bodies faces the other short side of the other sheet packaging body.

11. The sheet assembly packaging body according to claim 7, wherein two or more and three or less sheet packaging bodies are stacked in the short direction of the sheet packaging bodies so that one long side of one of the sheet packaging bodies faces the other long side of the other sheet packaging body.

12. The sheet assembly package according to claim 7 , wherein the sheet contains a moisturizing agent.

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