Sheet set package

Abstract

To provide a sheet collective package which maintains load efficiency while improving productivity.SOLUTION: A sheet collective package 200 is given with a resin film collective package bag 40 accommodating an aggregation 30 aggregating a plurality of sheet packages 100 in a height direction which includes: a resin film package bag accommodating a rectangular parallelepiped sheet laminate where a plurality of sheets are laminated; and a take-out port which is formed on a top surface of the package bag and from which a sheet is taken out. The sheet laminate is laminated in a CD direction where a sheet is taken out, and the sheet package is accommodated in the package bag in a tightened condition so that a lamination direction of the sheet laminate becomes a height direction of the sheet package. The aggregation is given in which the plurality of sheet packages are aggregated so that a longer direction of the sheet package becomes the height direction of the sheet collective package, and stiffness (LF) in the longer direction orthogonal to the height direction of the sheet collective package is 2.0% or more and 4.5% or less.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to Body sheet set packaging.

Background Art

[0002] Regarding sanitary thin papers such as tissue paper, the carton type in which the web is housed in a cardboard box has become widespread. However, from the viewpoints of transportation, storage, disposal, environmental load, cost, etc., in recent years, the demand for film packs in which the web is housed in a resin film-made packaging bag has been increasing.

[0003] In the production of film packs, in order to prevent a decrease in the extractability of sanitary thin paper due to web compression when the web is housed in the packaging bag, a rotary interfolder in which the sides of the web to be housed are easily aligned is used (see, for example, Patent Document 1).

[0004] Moreover, the individual packages of film packs are distributed as a set package in which a plurality are housed in a film-like packaging bag (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the production of film packs using a rotary interfolder, since the supply capacity of the web is low, the productivity of the film packs cannot be increased.

[0007] In addition, when using a multi-stand type interfolder with high web supply capacity instead of a rotary type interfolder, although the productivity of the film pack is improved, since the sides of the web are not aligned, the capacity of the film pack increases accordingly. As a result, in the collective package of film packs, the capacity increases by the number of film packs, and the same quantity of collective packages cannot be packed in a conventional case for packing a plurality of collective packages (the loading efficiency decreases).

[0008] Furthermore, a film pack with non-aligned sides of the web can have its capacity reduced by strongly compressing the web or the collective package, but when the sides of the contained web are not aligned, it may be crushed during manufacturing or storage, resulting in a decrease in the extractability of the sanitary tissue paper.

[0009] An object of the present invention is to provide a sheet collective package that can maintain the loading efficiency while improving productivity.

Means for Solving the Problems

[0010] A first aspect of the present invention is a sheet collective package having a rectangular parallelepiped sheet laminate in which a plurality of sheets are laminated, a resin film packaging bag that houses the sheet laminate, and an outlet formed on the top surface of the packaging bag through which the sheet is drawn out. The sheet collective package includes an aggregate in which a plurality of the sheet packages are integrated in the height direction of the sheet package, and a resin film collective packaging bag that houses the aggregate. The sheet laminate is laminated such that the direction in which the sheet is drawn out is the CD direction. The sheet package is housed in the packaging bag in a state where the sheet laminate is tightened such that the lamination direction of the sheet laminate becomes the height direction of the sheet package. The aggregate is formed by integrating a plurality of the sheet packages such that the longitudinal direction of the sheet package becomes the height direction of the sheet collective package. The sheet collective package has a longitudinal firmness (LF) orthogonal to the height direction of the sheet collective package of 2.0% or more and 4.5% or less.

[0011] In this specification, the CD direction refers to the direction orthogonal to the flow direction (MD direction) of the fibers constituting the sheet. "The direction in which the sheet is pulled out is the CD direction" means that when the sheet is pulled out from the outlet of the sheet package, the moving direction of the sheet is the CD direction, and also means that the moving direction of the sheet is the CD direction even in the stacked state within the package.

[0012] The sheet laminate laminated such that the direction in which the sheet is pulled out is the CD direction includes those in which the sheets are laminated by a multi-stand interfolder (a device that manufactures a web by alternately stacking sheets while folding them with one folding plate).

[0013] A sheet laminate in which the sheets are laminated by a multi-stand interfolder usually constitutes a sheet laminate laminated such that the direction in which the sheet is pulled out is the CD direction. Also, in the case where the sheet laminate is in a rectangular parallelepiped shape, when the sheet laminate is laminated by a multi-stand interfolder, a pair of long sides are likely to be uneven (the fold lines of the sheets are likely to shift in the stacking direction).

[0014] The longitudinal direction orthogonal to the height direction of the sheet set package is the height direction of the sheet package constituting the assembly packaged in the collective packaging bag when the longitudinal direction of the sheet package is the height direction of the sheet set package.

[0015] The firmness (LF) in the longitudinal direction orthogonal to the height direction of the sheet set package is the ratio [(A - B) / (A)]×100 (%) of the difference (A - B) between the length (A) before loading and the length (B) after loading in the vertical direction of the sheet set package when a weight of a predetermined weight (for example, 500 g) is placed on the upper surface of the sheet set package and loaded in a state where the height direction of the sheet set package is parallel to the ground and the longitudinal direction of the sheet set package is perpendicular to the ground.

[0016] In the first aspect, since the sheet laminate laminated such that the direction in which the sheet is pulled out is the CD direction is laminated by a multi-stand type interfolder with high supply capacity, the productivity of the sheet packages constituting the sheet set package can be improved.

[0017] Also, in the first aspect, the longitudinal hardness (LF) of the sheet set package composed of sheet packages in which the sheet laminate is housed in a packaging bag in a state where the sheet laminate is tightened so that the lamination direction of the sheet laminate is the height direction of the sheet package is 2.0% or more and 4.5% or less. Thereby, an increase in the capacity of the sheet set package in which the sheet packages are stacked can be prevented, and the stacking efficiency of the sheet set package can be maintained.

[0018] Furthermore, in the first aspect, since the longitudinal hardness (LF) of the sheet set package is 2.0% or more and 4.5% or less, an appropriate compaction is applied to each sheet package constituting the sheet set package. Therefore, even if the long sides of the sheet laminate manufactured by the multi-stand type interfolder are uneven, they will not be crushed, so that a decrease in the sheet take-out property during use of the sheet package can be prevented.

[0019] A second aspect of the present invention provides the sheet set package according to the first aspect, in which at least the long sides of each of the sheet packages are housed in the collective packaging bag in a tightened state.

[0020] In the second aspect, since the assembly is housed in the collective packaging bag in a state where at least the long sides of each sheet package constituting the assembly are tightened, compaction can be applied to the long sides of the sheet laminate in each sheet package constituting the sheet set package. Therefore, an increase in the capacity of each sheet package constituting the sheet set package can be prevented. As a result, an increase in the capacity of the sheet set package in which the sheet packages are stacked can be prevented, and the stacking efficiency of the sheet set package can be maintained.

[0021] A third aspect of the present invention provides the sheet assembly package according to the first or second aspect, wherein the collective packaging bag is a gusset packaging bag. In the present specification, a gusset packaging bag is a packaging bag in which both ends or one end of a tubular resin film folded in a gusset shape is sealed.

[0022] In the third aspect, since the collective packaging bag is a gusset packaging bag, when the assembly is accommodated in the collective packaging bag, the long side surfaces of the respective sheet packages constituting the assembly are tightened by the tubular resin film. Therefore, an increase in the volume of the sheet assembly package in which the sheet packages are stacked can be prevented, and the stacking efficiency of the sheet assembly package can be maintained.

[0023] A fourth aspect of the present invention provides the sheet assembly package according to any one of the first to third aspects, wherein the sheet package is one in which the sheet laminate is caramel-packaged. In the present specification, caramel packaging means being packaged in a packaging bag in which both ends or one end of a tubular film is folded and adhered or sealed.

[0024] In the fourth aspect, by caramel-packaging the sheet laminate, the compaction of each sheet package constituting the sheet assembly package becomes easy. Therefore, it becomes easy to adjust the longitudinal firmness (LF) of the sheet assembly package composed of such sheet packages.

[0025] A fifth aspect of the present invention provides the sheet assembly package according to any one of the first to fourth aspects, wherein the ratio of the longitudinal length of the sheet assembly package to the total height of the sheet laminate before packaging is 90% or less.

[0026] In this specification, the total height of the sheet laminate before packaging refers to the height in the stacking direction of the sheet laminate before being accommodated in the packaging bag of the sheet package, multiplied by the number of sheet packages constituting the sheet collective package. Also, the length in the longitudinal direction of the sheet collective package refers to the length before loading when measuring the firmness (LF) in the longitudinal direction of the sheet collective package.

[0027] In the fifth aspect, by making the ratio of the length in the longitudinal direction of the sheet collective package to the total height of the sheet laminate before packaging 90% or less, even when using a sheet laminate manufactured by a multi-stand type interfolder, an increase in the capacity of the sheet package can be prevented. Therefore, in a sheet collective package composed of such sheet packages, an increase in the capacity of the sheet collective package itself can be prevented, and the loading efficiency of the sheet collective package can be maintained.

[0028] The sixth aspect according to the present invention provides a sheet collective package according to any one of the first to fifth aspects, wherein the collective body is accommodated in the collective packaging bag in a state where a plurality of them are stacked in the height direction of the sheet collective package.

[0029] In the sixth aspect, since a plurality of collective bodies are accommodated in the collective packaging bag in a state where they are stacked in the height direction of the sheet collective package, a plurality of sheet packages are stacked not only in the height direction but also in the longitudinal direction, and compaction can be applied to the long side surface of each sheet package. Therefore, while maintaining the loading efficiency of the sheet collective package, the number of sheet packages accommodated in the sheet collective package can be increased.

[0030] The seventh aspect according to the present invention is a sheet package constituting the collective body of the sheet collective package according to any one of the first to sixth aspects.

[0031] In the seventh aspect, since the sheet package constitutes the above-described sheet collective package, the effects of the sheet package used for the above-described sheet collective package can be obtained as they are.

Advantages of the Invention

[0032] According to one aspect of the present invention, it is possible to provide a sheet set package that can maintain the loading efficiency while improving productivity.

Brief Description of the Drawings

[0033]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals may be given to common parts and the description thereof may be omitted. In addition, the scales of the respective members in the drawings may be different from the actual ones.

[0035] In this specification, the directions of the figures will be described using a three-dimensional orthogonal coordinate system of three axial directions (X direction, Y direction, Z direction). In each figure, the left-right direction (longitudinal direction of the sheet package or the sheet set package) is the X direction, the front-back direction (lateral direction of the sheet package or the sheet set package) is the Y direction, and the up-down direction (height direction of the sheet package or the sheet set package) is the Z direction.

[0036] In the present specification, in each direction, a deviation that does not impair the operation and effect of the embodiment is allowed. The orthogonal may include a substantially orthogonal. The rectangular parallelepiped shape may include a substantially rectangular parallelepiped shape.

[0037] <Sheet package> FIG. 1 is a view showing a sheet package according to an embodiment. FIG. 2 is a view showing a sheet laminate housed in the sheet package (individual package). FIG. 3 is an enlarged view of the sheet laminate before packaging as seen from one side surface side.

[0038] The sheet package 100 according to the present embodiment has a sheet laminate 10 and a packaging bag 20 (FIG. 1). In the present embodiment, the sheet laminate 10 is housed in the packaging bag 20 such that the stacking direction (SD direction) of the sheets 10A is the height direction (Z direction). Note that the sheet package 100 is an example of the sheet package according to the present embodiment.

[0039] The sheet laminate 10 is formed by laminating a plurality of (or a plurality of sets of) sheets 10A (FIG. 2). The shape of the sheet laminate 10 is a rectangular parallelepiped. The sheets 10A can be pulled out one by one (or one set by one set) through an outlet 21A formed in the top surface 21 of the packaging bag 20 (see FIG. 1).

[0040] The material of the sheet 10A is not particularly limited, and examples thereof include paper, non-woven fabric, or cloth, and preferably tissue paper. When the sheet is tissue paper, a known composition in the tissue paper can be used as the pulp composition. The blending ratio of the pulp can be, for example, 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0041] Also, the basis weight of the sheet 10A is not particularly limited, but depending on the ply number, in the case of paper, it is 5 g / m 2 or more and 80 g / m 2 or less, and in the case of non-woven fabric, it is 20 g / m 2 or more and 100 g / m 2 or less, which is desirable. Note that the basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0042] In addition, the thickness of the sheet 10A is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be adopted. For example, when the sheet is tissue paper, the paper thickness of the tissue paper can be 50 μm or more and 500 μm or less per ply (2 plies in the case of 2 plies), preferably 60 μm or more and 330 μm or less.

[0043] In addition, from the viewpoint of pulling out the sheets 10A one by one or one set at a time, the sheet laminate 10 is preferably one in which the sheets 10A are alternately laminated in a folded state (so-called pop-up type sheet laminate 10). Further, the form of the sheet laminate 10 is not limited to one that can be pulled out in a pop-up manner, and may be one in which a plurality of sheets (or a plurality of sets) of the sheet 10A are simply laminated, or one in which the sheets 10A are laminated in a folded state.

[0044] In addition, the dimensions of the sheet laminate 10 can be such that the length in the longitudinal direction (X direction) of the sheet package 100 is 155 mm or more and 230 mm or less, the length in the short side direction or the depth direction (Y direction) orthogonal to the longitudinal direction (X direction) of the sheet package 100 is 90 mm or more and 120 mm or less, and the thickness in the height direction or the thickness direction (Z direction) is 30 mm or more and 100 mm or less.

[0045] The form of the sheet 10A constituting the sheet laminate 10 is not particularly limited, and for example, it can be applied to sanitary thin papers such as tissue paper, toilet paper, kitchen paper, and paper towels. Note that sanitary thin papers such as tissue paper and paper towels also include sanitary thin papers containing a moisturizing component (for example, lotion tissue, etc.). In addition, the use of the sheet 10A is not particularly limited, and it can be applied to any of industrial, household, and portable uses. Among these, it is preferably used for household tissue paper.

[0046] The sheet laminate 10 is laminated such that the direction in which the sheet 10A is pulled out is the CD direction (the direction orthogonal to the flow direction (MD direction) of the fibers constituting the sheet 10A).

[0047] That the direction in which the sheet is pulled out is the CD direction means that the moving direction of the sheet 10A when the sheet 10A is pulled out from the outlet 21A of the sheet package 100 is the CD direction, and also means that the moving direction of the sheet 10A is the CD direction even in the state of the sheet laminate 10 in the sheet package 100.

[0048] The sheet laminate 10 laminated such that the pulling direction of the sheet 10A is the CD direction is preferably one in which the sheet 10A is laminated by a multi-stand type interfolder (a device that manufactures a web by alternately stacking sheets while folding them with one folding plate).

[0049] The sheet laminate 10 in which the sheets are laminated by a multi-stand type interfolder usually constitutes a sheet laminate laminated such that the direction in which the sheets are pulled out is the CD direction. When the sheet laminate 10 is in the shape of a rectangular parallelepiped, as shown in FIG. 2, a pair of long side surfaces LS viewed in the longitudinal direction (X direction) from one short side surface SS of the sheet laminate 10 is likely to be uneven (the fold lines of the sheets are likely to shift in the stacking direction SD).

[0050] Note that the sheet laminate 10 laminated by a conventional rotary type interfolder usually becomes a sheet laminate laminated such that the direction in which the sheets are pulled out is the MD direction. Also, when the sheet laminate 10 laminated by a rotary type interfolder is in the shape of a rectangular parallelepiped, as shown in FIG. 6, a pair of long side surfaces LS viewed in the longitudinal direction (X direction) from one short side surface SS of the sheet laminate 10 is likely to be aligned (the fold lines of the sheets are less likely to shift in the stacking direction SD).

[0051] The packaging bag 20 houses the sheet laminate 10.

[0052] The packaging bag 20 has a top surface 21, a bottom surface 22, a front surface 23, a back surface 24, a side surface 25, and a side surface 26 in a state where the sheet laminate 10 is accommodated. In the packaging bag 20, the top surface 21 and the bottom surface 22 face each other in the vertical direction (Z direction), the front surface 23 and the back surface 24 face each other in the front-rear direction (Y direction), and the side surface 25 and the side surface 26 face each other in the left-right direction (X direction). The side surface 25 and the side surface 26 are continuous with any of the top surface 21, the bottom surface 22, the front surface 23, and the back surface 24 (see FIG. 1).

[0053] An outlet 21A is provided on the top surface 21 of the packaging bag 20. The outlet 21A is configured such that the sheet 10A can be pulled out. The form of the outlet 21A is not particularly limited, and for example, it can be configured by continuous cuts, elongated openings, etc. The shape of the opening is not particularly limited, and it can be in the shape of a straight line, a wavy line, a rectangle, an ellipse, a dumbbell type, etc. Note that these cuts and openings may be formed by breaking the perforations (intermittent cuts) (see FIG. 1).

[0054] The packaging bag 20 is made of a resin film. The resin film constituting the packaging bag 20 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), and polyamide (PA) can be used. Further, as polyethylene, high-density polyethylene, low-density polyethylene, etc. can be used.

[0055] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferable in terms of being flexible, having excellent handleability, having high sealability when heat-sealed, and being inexpensive. Also, polyethylene is preferable in terms of being odorless, having excellent water resistance and chemical resistance, and being capable of mass production at low cost. Further, polypropylene is preferable from the viewpoints of being robust, being easy to mold, having good color development during printing, and being able to impart gloss.

[0056] In addition, biodegradable materials (such as biodegradable plastics) and biomass materials (renewable organic resources derived from living organisms such as biomass films, excluding fossil resources) can be used for the resin film forming the packaging bag 20.

[0057] The form of the resin film forming the packaging bag 20 is not particularly limited, and it may be a single-layer film formed of the above-mentioned resin in a single layer, a laminate film in which the above-mentioned resins are laminated, or a mixed film formed of a mixture of two or more of the above-mentioned resins.

[0058] The thickness of the resin film forming the packaging bag 20 is not particularly limited, preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 70 μm or less. By setting the thickness of the resin film to 20 μm or more, sufficient strength as the packaging bag 20 for accommodating the sheet 10A can be ensured. Also, by setting the thickness of the resin film to 100 μm or less, the flexibility and light weight of the packaging bag 20 can be ensured, and the cost can be reduced.

[0059] Also, the packaging mode of the packaging bag 20 is not particularly limited. In this embodiment, for example, packaging (caramel packaging) in which both ends of a tubular resin film are folded and sealed, packaging (pillow packaging) in which both ends or either one end of a tubular resin film folded into a gusset shape is sealed, packaging (shrink packaging) in which a heat-shrinkable resin film is heated and adhered to the object to be packaged, or a combination of these can be adopted. Among these, caramel packaging is preferable (see FIG. 1) in terms of easy control of the compaction with respect to the sheet laminate 10.

[0060] In the caramel packaging, the sheet laminate 10 is wrapped by being rolled into a cylindrical shape with both ends in the longitudinal direction (X direction) open with a resin film, and the overlapping portions in the rolling direction are adhered by a fusion process or an 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 10, and at least the leading edge portions of the substantially triangular or substantially trapezoidal pieces formed at that time are overlapped and adhered by a fusion process or an adhesive to seal the opening of the cylinder. In the present embodiment, both end portions (side faces 25, 26 of the packaging bag 20) of the cylindrical resin film are folded and sealed (see FIG. 1).

[0061] In the sheet package 100, the sheet laminate 10 is accommodated in the packaging bag in a tightened state. Specifically, when the sheet laminate 10 is caramel-packaged, compression is applied to the sheet laminate 10. The compression at this time is adjusted in consideration of the hardness (LF) of the sheet set package described later.

[0062] <Sheet set package> FIG. 4 is a view showing a sheet set package. The sheet set package 200 has an aggregate 30 and an aggregate packaging bag 40.

[0063] The aggregate 30 has a plurality of sheet packages 100 integrated in the height direction (Z direction) of the sheet package 100. Also, in the aggregate 30, a plurality of sheet packages 100 are integrated such that the longitudinal direction (X direction) of the sheet package 100 becomes the height direction (X direction) of the sheet set package 200. Further, the aggregate 30 is accommodated in the aggregate packaging bag 40 in a state where a plurality of them are integrated in the height direction (X direction) of the sheet set package 200.

[0064] Specifically, in the above-described sheet package 100, a set of five sheet packages 100 stacked in a row in the height direction (Z direction) such that the top surface 21 of one packaging bag 20 faces the bottom surface 22 of another packaging bag 20 form a plurality of sets 30 arranged in two rows in the longitudinal direction (X direction) such that the side surface 25 of one packaging bag 20 faces the side surface 26 of another packaging bag 20 (FIG. 4). Note that the number of sheet packages 100 constituting the set 30 is not limited, and two or more sheet packages 100 may be used.

[0065] The collective packaging bag 40 houses the set 30.

[0066] The collective packaging bag 40 has a top surface 41, a bottom surface 42, a front surface 43, a back surface 44, a side surface 45, and a side surface 46 in a state where the set 30 is housed. In the collective packaging bag 40, the top surface 41 and the bottom surface 42 face each other in the left-right direction (X direction), the front surface 43 and the back surface 44 face each other in the front-back direction (Y direction), and the side surface 45 and the side surface 46 face each other in the up-down direction (Z direction). The side surfaces 45 and 46 are continuous with any of the top surface 41, the bottom surface 42, the front surface 43, and the back surface 44 (see FIG. 4).

[0067] A handle 50 is provided on the top surface 41 of the collective packaging bag 40. The handle 50 is provided with an opening 51 for hanging a finger. The handle 50 is formed integrally with the collective packaging bag 40 and can be changed from a state of lying on the top surface 41 of the collective packaging bag 40 to a state of standing up when the user grabs the handle 50 (FIG. 4).

[0068] The collective packaging bag 40 is made of a resin film. The resin film constituting the collective packaging bag 40 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), and polyamide (PA) can be used. Further, as the polyethylene, high-density polyethylene, low-density polyethylene, etc. can be used.

[0069] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferable in terms of being flexible, having excellent handling properties, high sealing properties when heat-sealed, and being inexpensive. Also, polyethylene is preferable in that it is odorless, has excellent water resistance and chemical resistance, and can be mass-produced at low cost. Further, polypropylene is preferable from the viewpoints of being robust, easy to mold, having good color development during printing, and being able to impart gloss.

[0070] In addition, biodegradable materials (such as biodegradable plastics) and biomass materials (renewable organic resources derived from living organisms such as biomass films, excluding fossil resources) can be used for the resin film forming the collective packaging bag 40.

[0071] The form of the resin film forming the collective packaging bag 40 is not particularly limited, and it may be a single-layer film formed of a single layer of the above-mentioned resin, a laminate film formed by laminating the above-mentioned resins, or a mixed film formed of a mixture of two or more of the above-mentioned resins.

[0072] The thickness of the resin film forming the collective packaging bag 40 is not particularly limited, preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 70 μm or less. By setting the thickness of the resin film to 20 μm or more, sufficient strength as the collective packaging bag 40 for accommodating the aggregate 30 of the sheet packaging bodies 100 can be ensured. Also, by setting the thickness of the resin film to 100 μm or less, the flexibility and light weight of the collective packaging bag 40 can be ensured, and the cost can be suppressed.

[0073] Also, the packaging mode of the collective packaging bag 40 is not particularly limited. For example, packaging (gusset packaging or pillow packaging) in which both ends or one end of a tubular resin film folded in a gusset shape is sealed, packaging (caramel packaging) in which both ends or one end of a tubular resin film are folded and adhered or sealed, packaging (shrink packaging) in which a heat-shrinkable resin film is heated and adhered to the object to be packaged, or a combination of these can be adopted. Among these, gusset packaging (the collective packaging bag 40 being a gusset packaging bag) is preferable in terms of easy control of the compaction of the aggregate 30 accommodated in the collective packaging bag 40.

[0074] In the sheet collective package 200, at least the side surface of the aggregate 30 is accommodated in the collective packaging bag 40 in a tightened state. Specifically, when the aggregate 30 is pillow-packaged in a gusset shape, compaction (compression) is applied to the side surface (at least the long side surface) LS of the aggregate 30 (the sheet laminate 10 accommodated in each sheet package 100) when the aggregate 30 is pillow-packaged in a gusset shape. The compaction at this time is adjusted in consideration of the hardness (LF) of the sheet collective package described later.

[0075] The sheet collective package 200 has a hardness (LF) in the longitudinal direction (Z direction) orthogonal to the height direction (X direction) of the sheet collective package 200 of 2.0% or more and 4.5% or less, preferably 2.3% or more and 4.3% or less, more preferably 2.6% or more and 4.1% or less.

[0076] Here, when the longitudinal direction (X direction) of the sheet package 100 is the height direction (X direction) of the sheet collective package 200 as in this embodiment, the longitudinal direction (Z direction) orthogonal to the height direction (X direction) of the sheet collective package 200 is the height direction (Z direction) of the sheet package 100 constituting the aggregate 30 packaged in the collective packaging bag 40.

[0077] Further, the firmness (LF) in the longitudinal direction (Z direction) orthogonal to the height direction (X direction) of the sheet set package 200 is such that when the sheet set package 200 is placed with its height direction (X direction) parallel to the ground and its longitudinal direction (Z direction) perpendicular to the ground, a weight 70 is placed on the upper surface (side surface 45 in this embodiment) of the sheet set package 200 (collective packaging bag 40) and loaded. It represents the ratio [(A - B) / (A)]×100 (%) of the difference (A - B) between the length (A) before loading and the length (B) after loading in the vertical direction (Z direction) of the sheet set package 200 to the length (A) before loading.

[0078] Specifically, the state where an acrylic plate 60 with marks (marks 61 to 64) made at four positions on the top surface 41 of the sheet set package 200 is placed is taken as before loading of the sheet set package 200, and the state where a 500 g weight 70 is placed on the acrylic plate 60 is taken as after loading of the sheet set package 200. Then, the firmness (LF) is calculated by applying the average of the lengths before loading and the average of the lengths after loading at the four positions where the marks 61 to 64 are made to the above formula.

[0079] In this embodiment, as shown in FIG. 5, the firmness (LF) in the longitudinal direction (Z direction) orthogonal to the height direction (X direction) of the sheet set package 200, which is formed by accommodating an assembly 30 composed of five sheet packages 100 in a collective packaging bag 40 arranged in three rows, is 2.0% or more and 4.5% or less.

[0080] For the sheet set package 200, the ratio (H2 / HA) of the length H2 in the longitudinal direction (Z direction) of the sheet set package 200 to the total height HA of the sheet laminate 10 before packaging is preferably 90% or less, and more preferably 85% or less.

[0081] Here, the total height of the sheet laminate 10 before packaging is shown as H1×N, where H1 is the height in the stacking direction SD of the sheet laminate 10 before being accommodated in the packaging bag 20 of the sheet package 100, and N is the number of sheet packages 100 in one row that make up the sheet collective package 200. Also, the length of the sheet collective package indicates the length before loading when measuring the stiffness (LF) in the longitudinal direction (Z direction) of the sheet collective package 200 (the length with the acrylic plate 60 placed on it).

[0082] In the present embodiment, as shown in FIGS. 2 and 5, the total height of the sheet laminate 10 before packaging is H1×5, where H1 is the height in the stacking direction SD of the sheet laminate 10 before packaging and 5 is the number of sheet packages 100 in one row that make up the sheet collective package 200. Therefore, the ratio of the length L2 in the longitudinal direction (Z direction) of the sheet collective package 200 to the total height of the sheet laminate 10 before packaging is L2 / (H1×5) and is 90% or less.

[0083] In the sheet collective package 200 of the present embodiment, as described above, the sheet laminate 10 laminated such that the direction in which the sheet 10A is pulled out is the CD direction is laminated by a multi-stand type interfolder with high supply capacity. Therefore, the productivity of the sheet packages 100 that make up the sheet collective package 200 can be improved.

[0084] Also, in the sheet collective package 200 of the present embodiment, as described above, the stiffness (LF) in the longitudinal direction (Z direction) orthogonal to the height direction (X direction) of the sheet collective package 200 composed of the sheet packages 100 in which the sheet laminate 10 is accommodated in the packaging bag 20 in a state where the sheet laminate 10 is tightened so that the stacking direction SD of the sheet laminate 10 is the height direction (Z direction) of the sheet package 100 is 2.0% or more and 4.5% or less. Thereby, an increase in the volume of the sheet collective package 200 in which the sheet packages 100 are stacked can be prevented, and the stacking efficiency of the sheet collective package 200 can be maintained.

[0085] Furthermore, in the sheet set package 200 of the present embodiment, since the firmness (LF) in the longitudinal direction (Z direction) of the sheet set package 200 is 2.0% or more and 4.5% or less, an appropriate compaction is applied to each sheet package 100 constituting the sheet set package 200. Therefore, as described above, even if the side surface (long side surface) LS of the sheet laminate 10 manufactured by the multi-stand interfolder is uneven, it will not be crushed, so that it is possible to prevent a decrease in the extractability of the sheet 10A when using the sheet package 100.

[0086] Also, in the sheet set package 200 of the present embodiment, as described above, since the assembly 30 is accommodated in the assembly packaging bag 40 in a state where at least the long side surface LS of each sheet package 100 constituting the assembly 30 is tightened, it is possible to apply compaction to the long side surface LS of the sheet laminate 10 in each sheet package 100 constituting the sheet set package 200. Therefore, it is possible to prevent an increase in the capacity of each sheet package 100 constituting the sheet set package 200. As a result, it is possible to prevent an increase in the capacity of the sheet set package 200 in which the sheet packages 100 are stacked, and it is possible to maintain the stacking efficiency of the sheet set package 200.

[0087] In the sheet set package 200 of the present embodiment, as described above, since the assembly packaging bag 40 is a gusset packaging bag, when the assembly 30 is accommodated in the assembly packaging bag 40, the long side surface LS of each sheet package 100 constituting the assembly 30 is tightened by the tubular resin film. Therefore, it is possible to prevent an increase in the capacity of the sheet set package 200 in which the sheet packages 100 are stacked, and it is possible to maintain the stacking efficiency of the sheet set package 200.

[0088] In the sheet set package 200 of the present embodiment, as described above, by packaging the sheet laminate 10 with caramel, the compaction of each sheet package 100 constituting the sheet set package 200 becomes easier. Therefore, it becomes easier to adjust the firmness (LF) in the longitudinal direction (Z direction) of the sheet set package 200 composed of such sheet packages 100.

[0089] In the sheet set package 200 of the present embodiment, as described above, by setting the ratio of the length L2 in the longitudinal direction (Z direction) of the sheet set package 200 to the total height HA of the sheet laminate 10 before packaging to 90% or less, even when the sheet laminate 10 manufactured by a multi-stand interfolder is used, an increase in the capacity of the sheet package 100 can be prevented. Therefore, in the sheet set package 200 configured by such a sheet package 100, an increase in the capacity of the sheet set package 200 itself can be prevented, and the loading efficiency of the sheet set package 200 can be maintained.

[0090] In the sheet set package 200 of the present embodiment, as described above, since the plurality of assemblies 30 are accommodated in the collective packaging bag 40 in a state where they are stacked in the height direction (X direction) of the sheet set package 200, the plurality of sheet packages 100 are stacked not only in the height direction (Z direction) but also in the longitudinal direction (X direction), and compaction can be applied to the long side surface LS of each sheet package 100. Therefore, while maintaining the loading efficiency of the sheet set package 200, the number of sheet packages 100 accommodated in the sheet set package 200 can be increased.

[0091] Further, as described above, the sheet package 100 of the present embodiment constitutes the sheet set package 200 of the present embodiment, so that the effects of the sheet package 100 used for the sheet set package 200 can be obtained as they are.

[0092] Specifically, in the sheet package 100 of the present embodiment, as described above, since the sheet laminate 10 laminated so that the direction in which the sheet 10A is pulled out is the CD direction is laminated by a multi-stand interfolder with high supply capacity, the productivity of the sheet package 100 constituting the sheet set package 200 can be improved.

[0093] Further, as described above, the sheet package 100 of the present embodiment is a sheet package 100 housed in a packaging bag 20 in a state where the sheet laminate 10 is tightened so that the stacking direction SD of the sheet laminate 10 becomes the height direction (Z direction) of the sheet package 100, and the sheet package 100 constitutes a sheet collective package 200. The hardness (LF) in the longitudinal direction (Z direction) orthogonal to the height direction (X direction) of the sheet collective package 200 is 2.0% or more and 4.5% or less. Thereby, an increase in the volume of the sheet collective package 200 in which the sheet packages 100 are stacked can be prevented, and the stacking efficiency of the sheet collective package 200 can be maintained.

[0094] Furthermore, as described above, the sheet package 100 of the present embodiment constitutes the sheet collective package 200, and since the hardness (LF) in the longitudinal direction (Z direction) of the sheet collective package 200 is 2.0% or more and 4.5% or less, an appropriate compaction is applied to each sheet package 100 constituting the sheet collective package 200. Therefore, as described above, even if the side surface (long side surface) LS of the sheet laminate 10 manufactured by the multi-stand type interfolder is uneven, it is not crushed, so that a decrease in the extractability of the sheet 10A during use of the sheet package 100 can be prevented.

Example

[0095] Hereinafter, the present invention will be specifically described with reference to further examples. The evaluation of the examples and comparative examples was performed under the following conditions.

[0096] [Sheet package (individual package)] As the sheet laminate 10, a tissue paper (dimensions: height (Z direction) of about 58 mm, width (X direction) of about 180 mm, length (Y direction) of about 101 mm, weight of about 120 g) in which the sheets 10A are alternately folded and stacked so that one set can be pulled out in a pop-up manner was caramel-wrapped with a packaging bag 20 formed of a polyethylene laminate film having a thickness of about 62 μm to prepare a sheet package 100 (see FIGS. 1 and 2).

[0097] [Sheet collective package] As the sheet set package 200, five sheet packages 100 are stacked in the vertical direction (Z direction) such that the top surface 21 of the packaging bag 20 of the sheet package 100 and the bottom surface 22 of another packaging bag 20 face each other, and further, an assembly 30 arranged in two rows in the longitudinal direction (X direction) such that the side surface 25 of the packaging bag 20 and the side surface 26 of another packaging bag 20 face each other is pillow-packed in a gusset shape in an assembly packaging bag 40 formed of a polyethylene film having a thickness of about 35 μm (see Fig. 4).

[0098] [Rigidity (LF) of the sheet set package] Measure the rigidity (LF) in the longitudinal direction (Z direction) orthogonal to the height direction (X direction) of the sheet set package 200. In the measurement of the rigidity (LF), an acrylic plate 60 having a thickness (Z direction) of 3 mm, a length (Y direction) of 165 mm, and a width (X direction) of 320 mm with marks 61 to 64 attached to the central portions of the four sides is placed on the upper surface (side surface 45) of the sheet set package 200 (assembly packaging bag 40), and the lengths from the lower surface (side surface 46) of the sheet set package 200 (assembly packaging bag 40) to the four locations (marks 61 to 64) of the acrylic plate 60 are measured, and the average value of the lengths to the four locations is taken as the length L2 before loading. A weight 70 of 500 g is placed at the center of the acrylic plate 60, the lengths to the four locations (marks 61 to 64) of the acrylic plate 60 are measured, and the average value of the lengths from the lower surface (side surface 46) of the sheet set package 200 (assembly packaging bag 40) to the four locations is taken as the length L3 after loading. The amount of indentation HD obtained by subtracting the length L3 after loading from the length L2 before loading is determined. Then, (amount of indentation HD / length L2 before loading) × 100 is taken as the rigidity (LF). The evaluation of the rigidity (LF) was performed according to the following criteria. [Evaluation criteria] Excellent: 2.6% or more and 4.1% or less Good: 2.3% or more and 4.3% or less Fair: 2.0% or more and 4.5% or less Poor: Less than 2.5% or exceeding 6.0%

[0099] [Ease of sheet removal] The extractability of the sheet was evaluated. In the evaluation of extractability, one sheet package 100 was taken out from the sheet set package 200, and the sheets 10A were taken out from 1 to 10 sets. The number of times the sheet 10A was torn and the number of times the sheet package 100 floated were evaluated (performed N = 3 times). The evaluation of extractability was carried out according to the following criteria. When the evaluation was A or B, the extractability was judged to be good, and when the evaluation was C, the extractability was judged to be poor.

[0100] 〔Evaluation Criteria〕 A: The number of tears and / or floats is 0 times B: The number of tears and / or floats is less than 5 times C: The number of tears and / or floats is 5 times or more

[0101] [Compactness of the Pack] The compactness of the sheet set package (pack) was evaluated. In the evaluation of compactness, for the sheet set package 200, the ratio ((L2 / (H1×5))×100) of the length L2 in the longitudinal direction (Z direction) of the sheet set package 200 to the total height of the sheet laminate 10 in the state of the sheet laminate 10 before packaging (the height H1 in the stacking direction SD of the sheet laminate 10 before packaging multiplied by the number 5 of one row of the sheet packages 100 constituting the sheet set package 200) was calculated. The evaluation of compactness was carried out according to the following criteria. When the evaluation was A or B, the compactness was judged to be good, and when the evaluation was C, the compactness was judged to be poor.

[0102] 〔Evaluation Criteria〕 A: Less than 85% B: 85% or more and less than 90% C: 90% or more

[0103] Table 1 shows the pushing-in amount (DH), hardness (LF), extractability of the sheet, and compactness of the pack for Examples 1 to 3 and Comparative Examples 1 and 2, respectively.

[0104]

Table 1

[0105] From Table 1, when the firmness LF in the longitudinal direction (Z direction) orthogonal to the height direction (X direction) of the sheet set package 200 was 2.0% or more and 4.5% or less, both the sheet extractability and the compactness of the pack were good (Examples 1 to 3).

[0106] On the other hand, when the firmness LF in the height direction (X direction) of the sheet set package 200 exceeded 4.5%, the compactness of the pack was poor (Comparative Example 1), and when it was less than 2.0%, the sheet extractability was poor (Comparative Example 2).

[0107] As described above, the embodiments of the present invention have been explained. However, the present invention is not limited to specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims.

Explanation of Signs

[0108] 100 Sheet package 10 Sheet laminate 10A Sheet 20 Packaging bag 21 Top surface 21A Outlet 22 Bottom surface 23 Front surface 24 Rear surface 25, 26 Side surfaces SD Laminating direction H1 Height LS Side surface (long side surface) SS Short side surface 30 Aggregate 40 Aggregate packaging bag 41 Top surface 42 Bottom surface 43 Front surface 44 Rear surface 45, 46 Side surfaces 50 Handle 51 Opening 60 Acrylic plate 61, 62, 63, 64 Marks 70 Weight 200 Sheet set package L2 Height (before load) L3 height (after load)

Claims

1. A rectangular sheet laminate in which a plurality of non-moisture-retaining tissue papers are laminated, a packaging bag made of low-density polyethylene film for accommodating the sheet laminate, and a take-out port formed on the top surface of the packaging bag through which the tissue paper is drawn out. A sheet package having the above is an aggregate in which a plurality of the sheet packages are integrated in the height direction of the sheet package, A sheet aggregate package having an aggregate packaging bag made of low-density polyethylene film for accommodating the aggregate, The sheet laminate is laminated such that the direction in which the tissue paper is drawn out is the CD direction and the long side surfaces of the sheet laminate are uneven, The sheet package is accommodated in the packaging bag in a state where the sheet laminate is tightened such that the lamination direction of the sheet laminate is the height direction of the sheet package, The aggregate is formed by integrating a plurality of the sheet packages such that the longitudinal direction of the sheet package is the height direction of the sheet aggregate package, The aggregate is accommodated in the aggregate packaging bag in a state where at least the long side surfaces of each of the sheet packages are tightened, The ratio of the length in the direction along the lamination direction of the sheet laminate of the sheet aggregate package to the total height of the sheet laminate before packaging in the height direction of the sheet aggregate package is 85% or more and less than 90%, The stiffness (LF) in the direction along the lamination direction of the sheet laminate orthogonal to the height direction of the sheet aggregate package is 2.0% or more and 4.5% or less. Sheet aggregate package.

2. The sheet aggregate package according to claim 1, wherein the aggregate packaging bag is a gusset packaging bag.

3. The sheet aggregate package according to claim 1, wherein the sheet package is one in which the sheet laminate is caramel-wrapped.

4. The sheet aggregate package according to claim 1, wherein the aggregate is accommodated in the aggregate packaging bag in a state where a plurality of the sheet packages are integrated in the height direction of the sheet aggregate package.

Images