Sheet set package

Abstract

To provide a sheet collective package which maintains load efficiency while improving productivity.SOLUTION: A sheet collective package comprises: an aggregation aggregating a plurality of sheet packages in which the sheet package includes a sheet laminate where a plurality of sheets are laminated, a resin film package bag accommodating the sheet laminate and a take-out port which is formed on a top surface of the package bag and from which a sheet is taken out; and a resin film collective package bag accommodating the aggregation. The sheet laminate is laminated in a CD direction where the sheet is taken out, the sheet package is such that the sheet laminates are accommodated in the package bag in a tightened condition, and stiffness (AF) in the height direction of the sheet collective package is 2.5% or more and 6.0% or less.SELECTED DRAWING: Figure 4

Description

Technical Field

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

Background Art

[0002] Regarding sanitary thin paper 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] In addition, 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, the side surfaces of the web are not aligned, so 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 number 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 side surfaces of the web can reduce its capacity by strongly compressing the web. However, when the web compression becomes strong, the side surfaces of the contained web are crushed in a non-aligned state, and the extractability of the sanitary tissue paper decreases.

[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 an assembly in which a plurality of sheet packages are integrated, the sheet packages having a sheet laminate in which a plurality of sheets are laminated, a resin film packaging bag for accommodating the sheet laminate, and an outlet formed on the top surface of the packaging bag through which the sheets are drawn out, and a collective resin film packaging bag for accommodating the assembly. The sheet laminate is laminated such that the direction in which the sheets are drawn out is the CD direction, the sheet package is accommodated in the packaging bag in a state where the sheet laminate is tightened, and the sheet collective package has a hardness (AF) in the height direction of 2.5% or more and 6.0% or less.

[0011] In this specification, the CD direction indicates a 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 laminated by a multi-stand type interfolder (a device for manufacturing a web by alternately stacking sheets while folding them with one folding plate).

[0013] A sheet laminate laminated by a multi-stand type 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 laminated by a multi-stand type interfolder is in a rectangular parallelepiped shape, a pair of long sides are likely to be uneven (the creases of the sheets are likely to shift in the stacking direction).

[0014] The hardness (AF) in the height direction of the sheet set package indicates the ratio [(A - B) / (A)]×100 (%) of the difference (A - B) between the height (A) before loading and the height (B) after loading of the sheet set package to the height (A) before loading when a weight of a predetermined weight (for example, 500 g) is placed on the upper surface of the sheet set package and loaded.

[0015] 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 package constituting the sheet set package can be improved.

[0016] In the first aspect, the sheet collective package composed of the sheet package in which the sheet laminate is housed in the packaging bag in a tightened state has a hardness (AF) in the height direction of 2.5% or more and 6.0% or less. Thereby, an increase in the volume of the sheet collective package in which the sheet packages are stacked can be prevented, and the stacking efficiency of the sheet collective package can be maintained.

[0017] Furthermore, in the first aspect, since the hardness (AF) in the height direction of the sheet collective package is 2.5% or more and 6.0% or less, each sheet package constituting the sheet collective package is in a state where appropriate compaction is applied. Therefore, even if the side surface of the sheet laminate manufactured by the multi-stand type interfolder is uneven, it will not be crushed, so that a decrease in the sheet take-out property during use of the sheet package can be prevented.

[0018] A second aspect of the present invention provides the sheet collective package according to the first aspect, wherein the sheet package is one in which the sheet laminate is housed in the packaging bag such that the stacking direction of the sheet laminate is the height direction of the sheet package, and the collective body is one in which a plurality of the sheet packages are stacked such that the height direction of the sheet package is the height direction of the sheet collective package.

[0019] In the second aspect, since the stacking direction of the sheet laminate is the height direction of the sheet package and the height direction of the sheet package is the height direction of the sheet collective package, the stacking direction of the sheet laminate is the height direction of the sheet collective package. Thereby, since appropriate compaction can be applied in the height direction of each sheet package constituting the sheet collective package, an increase in the volume of the sheet collective package in which the sheet packages are stacked can be prevented, and the stacking efficiency of the sheet collective package can be maintained.

[0020] A third aspect of the present invention provides the sheet collective package according to the first or second aspect, wherein the collective body is housed in the collective packaging bag in a state where at least the side surface of the collective body is tightened.

[0021] In the third aspect, since the assembly is accommodated in the assembly packaging bag with at least the side surface of the assembly being tightened, compaction can be applied to the side surface of the sheet laminate in each sheet packaging body constituting the sheet assembly packaging body. Therefore, an increase in the capacity of each sheet packaging body constituting the sheet assembly packaging body can be prevented. As a result, an increase in the capacity of the sheet assembly packaging body in which the sheet packaging bodies are stacked can be prevented, and the stacking efficiency of the sheet assembly packaging body can be maintained.

[0022] A fourth aspect of the present invention provides a sheet assembly packaging body according to any one of the first to third aspects, wherein the sheet packaging body is one in which the sheet laminate is caramel-wrapped. In the present specification, caramel wrapping means being wrapped in a packaging bag in which both ends or one end of a tubular film is folded and adhered or sealed.

[0023] In the fourth aspect, by caramel-wrapping the sheet laminate, compaction of each sheet packaging body constituting the sheet assembly packaging body becomes easy. Therefore, adjustment of the hardness (AF) in the height direction of the sheet assembly packaging body constituted by such sheet packaging bodies becomes easy.

[0024] A fifth aspect of the present invention provides a sheet assembly packaging body according to any one of the first to fourth aspects, wherein the ratio of the height of the sheet assembly packaging body to the total height of the sheet laminate before packaging is less than 90%.

[0025] In the present 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 packaging body, multiplied by the number of sheet packaging bodies constituting the sheet assembly packaging body. Also, the height of the sheet assembly packaging body refers to the height before loading when measuring the hardness (AF) in the height direction of the sheet assembly packaging body.

[0026] In the fifth aspect, the ratio of the height of the sheet set package to the total height of the sheet laminate before packaging is less than 90%. Thus, even when using a sheet laminate manufactured by a multi-stand type interfolder, an increase in the volume of the sheet package can be surely prevented. Therefore, in a sheet set package composed of such sheet packages, an increase in the volume of the sheet set package itself can be surely prevented, and the loading efficiency of the sheet set package can be surely maintained.

[0027] A sixth aspect according to the present invention is a sheet package constituting the aggregate of the sheet set package according to any one of the first to fifth aspects.

[0028] In the sixth aspect, since the sheet package constitutes the above-described sheet set package, the effects of the sheet package used for the above-described sheet set package can be obtained as they are.

Advantages of the Invention

[0029] According to one aspect of the present invention, it is possible to provide a sheet set package capable of maintaining the loading efficiency while improving productivity.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For parts common to each figure, the same reference numerals may be given and the description may be omitted. In addition, the scales of the respective members in each drawing may be different from the actual ones.

[0032] 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 (the longitudinal direction of the sheet package or the sheet set package) is the X direction, the front-back direction (the short-side direction of the sheet package or the sheet set package) is the Y direction, and the up-down direction (the height direction of the sheet package or the sheet set package) is the Z direction.

[0033] In addition, in this specification, for each direction, a deviation that does not impair the actions and effects of the embodiment is allowed. Also, "orthogonal" may include substantially orthogonal.

[0034] <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.

[0035] 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.

[0036] 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 not particularly limited, and is, for example, a rectangular parallelepiped shape, a cubic shape, or the like. The sheet 10A can be pulled out one by one (or one set by one set) through the outlet 21A formed in the top surface 21 of the packaging bag 20 (see FIG. 1).

[0037] The material of the sheet 10A is not particularly limited, and examples thereof include paper, non-woven fabric, or cloth, etc., and preferably thin paper. When the sheet is thin paper, a known composition in thin paper can be used for 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.

[0038] 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, 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).

[0039] Also, 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 thin paper, the paper thickness of the thin paper can be 50 μm or more and 500 μm or less per ply (in the case of 2 plies, it is 2 plies), and preferably 60 μm or more and 330 μm or less.

[0040] Note that the sheet laminate 10 is preferably one in which the respective sheets 10A are alternately laminated in a folded state (so-called pop-up type sheet laminate 10) from the viewpoint of pulling out one sheet 10A or one set at a time. Also, the form of the sheet laminate 10 is not limited to one that can be pulled out in a pop-up manner, and it 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 respective sheets 10A are laminated in a folded state.

[0041] Also, 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.

[0042] The form of the sheet 10A constituting the sheet laminate 10 is not particularly limited, and for example, it is applicable to sanitary thin papers such as tissue paper, toilet paper, kitchen paper, paper towels, etc. Note that sanitary thin papers such as tissue paper and paper towels include sanitary thin papers containing a moisturizing component (for example, lotion tissue, etc.). Further, 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.

[0043] 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).

[0044] The fact 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 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.

[0045] 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 (an apparatus that manufactures a web by alternately stacking sheets while folding them with one folding plate).

[0046] The sheet laminate 10 in which the sheet is laminated by a multi-stand type interfolder usually constitutes a sheet laminate laminated such that the direction in which the sheet is 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 are likely to be uneven (the fold lines of the sheet are likely to shift in the lamination direction SD).

[0047] Note that the sheet laminate 10 laminated by a conventional rotary folder is usually a sheet laminate laminated such that the direction in which the sheet is pulled out is the MD direction. Further, when the sheet laminate 10 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 are likely to be aligned (the creases of the sheets are less likely to shift in the lamination direction SD).

[0048] The packaging bag 20 houses the sheet laminate 10.

[0049] 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 housed. 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).

[0050] 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 configured by breaking the perforations (intermittent cuts) (see FIG. 1).

[0051] 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. As the polyethylene, high-density polyethylene, low-density polyethylene, etc. can be used.

[0052] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferable in terms of being flexible, having excellent handleability, high sealing property when heat-sealed, and being inexpensive. Also, polyethylene is preferable in that it is odorless, excellent in 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.

[0053] Note that, as the material for forming the packaging bag 20, biodegradable materials (such as biodegradable plastics) and biomass materials (renewable organic resources derived from organisms such as biomass films, excluding fossil resources) can be used.

[0054] The form of the resin film for forming the packaging bag 20 is not particularly limited, and it may be a single-layer film formed of a single layer of the above-described resin, a laminate film in which the above-described resins are laminated, or a mixed film formed of a mixture of two or more of the above-described resins.

[0055] The thickness of the resin film for forming the packaging bag 20 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 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 suppressed.

[0056] 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 cylindrical resin film are folded and sealed, packaging (pillow packaging) in which both ends or either one end of a cylindrical resin film folded in 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 in terms of easy control of compaction with respect to the sheet laminate 10 (see FIG. 1).

[0057] In caramel packaging, the sheet laminate 10 is wrapped so as to be rolled into a cylindrical shape with both ends in the longitudinal direction (X direction) open by a resin film, and the overlapping portions in the rolling direction are adhered by a fusion treatment 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 treatment or an adhesive to seal the opening of the cylinder. In this embodiment, both ends of the cylindrical resin film (side faces 25 and 26 of the packaging bag 20) are folded and sealed (see FIG. 1).

[0058] In the sheet package 100, the sheet laminate 10 is housed in the packaging bag in a tightened state. Specifically, when the sheet laminate 10 is caramel-packaged, compaction (compression) is applied to the sheet laminate 10. The compaction at this time is adjusted in consideration of the hardness (AF) of the sheet set package described later.

[0059] <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.

[0060] The aggregate 30 has a plurality of sheet packages 100 integrated therein. In this embodiment, a plurality of sheet packages 100 are integrated such that the height direction (Z direction) of the sheet package 100 becomes the height direction (Z direction) of the sheet set package 200.

[0061] Specifically, the above-mentioned sheet package 100 constitutes an aggregate 30 stacked in the vertical direction (Z direction) with five pieces such that the top surface 21 and the bottom surface 22 of the packaging bag 20 of the sheet package 100 face each other (Fig. 4). Note that the number of sheet packages 100 constituting the aggregate is not limited and may be two or more.

[0062] The collective packaging bag 40 houses the aggregate 30.

[0063] 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 aggregate 30 is housed. In the collective packaging bag 40, the top surface 41 and the bottom surface 42 face each other in the vertical direction (Z direction), the front surface 43 and the back surface 44 face each other in the front-rear direction (Y direction), and the side surface 45 and the side surface 46 face each other in the left-right direction (X direction). The side surface 45 and the side surface 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).

[0064] A handle 50 is provided on the top surface 41 of the collective packaging bag 40. An opening 51 for hanging fingers is provided on the handle 50. The handle 50 is integrally formed with the collective packaging bag 40 and can be changed from a state of lying down 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).

[0065] 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.

[0066] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferable in terms of being flexible, having excellent handleability, high sealing property 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.

[0067] As the polyethylene, high-density polyethylene, low-density polyethylene, etc. can be used. Also, from the viewpoints of being robust, easy to mold, having good color development during printing, and being able to impart gloss, polypropylene is preferable.

[0068] Note that as the material for forming the collective packaging bag 40, biodegradable materials (such as biodegradable plastics) and biomass materials (renewable organic resources derived from organisms such as biomass films, excluding fossil resources) can be used.

[0069] 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 the above resin alone, a laminate film formed by laminating the above resins, or a mixed film formed of a mixture of two or more of the above resins.

[0070] 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 packages 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.

[0071] 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 is preferable in terms of easy control of the compaction of the aggregate 30 accommodated in the collective packaging bag 40.

[0072] 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). The compaction at this time is adjusted in consideration of the firmness (AF) of the sheet collective package described later.

[0073] The sheet collective package 200 has a firmness (AF) in the height direction (Z direction) of the sheet collective package 200 of 2.5% or more and 6.0% or less, preferably 2.7% or more and 5.7% or less, more preferably 2.9% or more and 5.5% or less.

[0074] Here, the firmness (AF) in the height direction (Z direction) of the sheet collective package 200 indicates the ratio [(A - B) / (A)]×100 (%) of the difference (A - B) between the height (A) before loading and the height (B) after loading of the sheet collective package 200 when a weight 70 is placed on the top surface 41 of the sheet collective package 200 and loaded.

[0075] Specifically, the state where the acrylic plate 60 with marks (marks 61 to 64) applied at four positions on the top surface 41 of the sheet set package 200 is placed is defined as the state before loading of the sheet set package 200, and the state where a 500 g weight 70 is placed on top of the acrylic plate 60 is defined as the state after loading of the sheet set package 200. Then, the firmness (AF) is calculated by applying the average height before loading and the average height after loading at the four positions where the marks 61 to 64 are applied to the above formula.

[0076] In the present embodiment, as shown in FIG. 5, the firmness (AF) in the height direction (Z direction) of the sheet set package 200 in which the assembly 30 composed of five sheet packages 100 is housed in the assembly packaging bag 40 is 2.5% or more and 6.0% or less.

[0077] It is preferable that the ratio (H2 / HA) of the height H2 of the sheet set package 200 to the total height HA of the sheet laminate 10 before packaging is less than 90%, and more preferably 85% or less.

[0078] Here, the total height of the sheet laminate 10 before packaging indicates H1×N obtained by multiplying the height H1 in the lamination direction SD of the sheet laminate 10 before being housed in the packaging bag 20 of the sheet package 100 by the number N of the sheet packages 100 constituting the sheet set package 200. Also, the height of the sheet set package indicates the height before loading when measuring the firmness (AF) in the height direction (Z direction) of the sheet set package 200 (the height in the state where the acrylic plate 60 is placed).

[0079] In the present embodiment, as shown in FIGS. 2 and 5, the total height of the sheet laminate 10 before packaging is H1×5 obtained by multiplying the height H1 in the lamination direction SD of the sheet laminate 10 before packaging by the number 5 of the sheet packages 100 constituting the sheet set package 200. Therefore, the ratio of the height H2 of the sheet set package 200 to the total height of the sheet laminate 10 before packaging is such that H2 / (H1×5) is less than 90%.

[0080] In the sheet set 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 interfolder with high supply capacity. Therefore, the productivity of the sheet package 100 constituting the sheet set package 200 can be improved.

[0081] Further, in the sheet set package 200 of the present embodiment, as described above, the hardness (AF) in the height direction (Z direction) of the sheet set package 200 constituted by the sheet package 100 in which the sheet laminate 10 is housed in the packaging bag 20 in a tightened state is 2.5% or more and 6.0% or less. Thereby, an increase in the volume of the sheet set package 200 in which the sheet packages 100 are stacked can be prevented, and the stacking efficiency of the sheet set package 200 can be maintained.

[0082] Furthermore, in the sheet set package 200 of the present embodiment, since the hardness (AF) in the height direction (Z direction) of the sheet set package 200 is 2.5% or more and 6.0% 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 a decrease in the extractability of the sheet 10A during use of the sheet package 100 can be prevented.

[0083] Also, in the sheet set package 200 of the present embodiment, as described above, the lamination direction SD of the sheet laminate 10 becomes the height direction (Z direction) of the sheet package 100, and the height direction (Z direction) of the sheet package 100 becomes the height direction (Z direction) of the sheet set package 200. Thus, the lamination direction SD of the sheet laminate 10 becomes the height direction (Z direction) of the sheet set package 200. Thereby, an appropriate compaction can be applied in the height direction (Z direction) of each sheet package 100 constituting the sheet set package 200, so that an increase in the volume of the sheet set package 200 in which the sheet packages 100 are stacked can be prevented, and the stacking efficiency of the sheet set package 200 can be maintained.

[0084] 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 with at least the side surfaces of the assembly 30 tightened, compression can be applied to the side surfaces (long side surfaces) LS of the sheet laminate 10 in each sheet package 100 constituting the sheet set package 200. Therefore, an increase in the capacity of each sheet package 100 constituting the sheet set package 200 can be prevented. As a result, an increase in the capacity of the sheet set package 200 formed by stacking the sheet packages 100 can be prevented, and the loading efficiency of the sheet set package 200 can be maintained.

[0085] In the sheet set package 200 of the present embodiment, as described above, by packaging the sheet laminate 10 with caramel, compression of each sheet package 100 constituting the sheet set package 200 becomes easier. Therefore, adjustment of the stiffness (AF) in the height direction (Z direction) of the sheet set package 200 formed of such sheet packages 100 becomes easier.

[0086] In the sheet set package 200 of the present embodiment, as described above, when the ratio (H2 / HA) of the height H2 of the sheet set package 200 to the total height HA of the sheet laminate 10 before packaging is less than 90%, even when the sheet laminate 10 manufactured by a multi-stand type interfolder is used, an increase in the capacity of the sheet package 100 can be surely prevented. Therefore, in the sheet set package 200 formed of such sheet packages 100, an increase in the capacity of the sheet set package 200 itself can be surely prevented, and the loading efficiency of the sheet set package 200 can be surely maintained.

[0087] Further, as described above, since the sheet package 100 of the present embodiment constitutes the sheet set package 200 of the present embodiment, the effects of the sheet package 100 used for the sheet set package 200 can be obtained as they are.

[0088] Specifically, in the sheet package 100 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 package 100 that constitutes the sheet collective package 200 can be improved.

[0089] Further, in the sheet package 100 of the present embodiment, as described above, the sheet package 100 in which the sheet laminate 10 is housed in the packaging bag 20 in a tightened state constitutes the sheet collective package 200, and the firmness (AF) in the height direction (Z direction) of this sheet collective package 200 is 2.5% or more and 6.0% or less. Thereby, an increase in the capacity 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.

[0090] Furthermore, in the sheet package 100 of the present embodiment, as described above, by constituting the sheet collective package 200 and the firmness (AF) in the height direction (Z direction) of the sheet collective package 200 being 2.5% or more and 6.0% or less, an appropriate compaction is applied to each sheet package 100 that constitutes 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

[0091] 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.

[0092] [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 laminated so that one set can be pulled out in a pop-up manner was prepared as a sheet package 100 by caramel packaging with a packaging bag 20 made of a polyethylene laminate film with a thickness of about 62 μm (see FIGS. 1 and 2).

[0093] [Sheet set package] As the sheet set package 200, an assembly 30 in which five sheet packages 100 are stacked in the vertical direction (Z direction) such that the top surface 21 and the bottom surface 22 of the packaging bag 20 of the sheet package 100 face each other was prepared by pillow packaging in a gusset shape in an assembly packaging bag 40 made of a polyethylene film with a thickness of about 35 μm (see FIG. 4).

[0094] [Rigidity of sheet set package] The rigidity (AF) in the height direction (Z direction) of the sheet set package 200 is measured. In the measurement of the rigidity (AF), an acrylic plate 60 with 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 each of the four sides, is placed on the top surface 41 of the assembly packaging bag 40 of the sheet set package 200. The height 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) on the acrylic plate 60 is measured, and the average value of the heights to these four locations is taken as the height H2 before loading. A weight 70 of 500 g is placed at the center of the acrylic plate 60, and the height 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) on the acrylic plate 60 is measured, and the average value of the heights to these four locations is taken as the height H3 after loading. The indentation amount HD obtained by subtracting the height H3 after loading from the height H2 before loading is determined. Then, (indentation amount HD / height H2 before loading) × 100 is taken as the rigidity (AF). The evaluation of the rigidity (AF) was performed according to the following criteria.

[0095] 〔Evaluation criteria〕 Excellent: 2.9% or more and 5.5% or less Good: 2.7% or more and 5.7% or less OK: 2.5% or more and 6.0% or less NG: Less than 2.5% or more than 6.0%

[0096] [Ease of sheet extraction] The ease of sheet extraction was evaluated. In the evaluation of the ease of extraction, one sheet package 100 was taken out from the sheet set package 200, and the sheets 10A were taken out up to 1 to 10 sets, and the number of times of tearing of the sheet 10A and floating of the sheet package 100 was evaluated (performed N = 3 times). The evaluation of the ease of extraction was carried out according to the following criteria. When the evaluation was A or B, the ease of extraction was judged to be good, and when the evaluation was C, the ease of extraction was judged to be poor.

[0097] 〔Evaluation criteria〕 A: 0 times of tearing and / or floating B: Less than 5 times of tearing and / or floating C: 5 times or more of tearing and / or floating

[0098] [Compactness of the pack] The compactness of the sheet set package (pack) was evaluated. In the evaluation of the compactness, for the sheet set package 200, the ratio ((H2 / H1×5)×100) of the height H2 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 was calculated. The evaluation of the 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.

[0099] 〔Evaluation criteria〕 A: Less than 85% B: 85% or more and less than 90% C: 90% or more

[0100] Table 1 shows the pushing-in amount (DH), hardness (AF), ease of sheet extraction, and compactness of the pack for Examples 1 and 2 and Comparative Examples 1 and 2, respectively.

[0101]

Table 1

[0102] From Table 1, when the firmness AF in the height direction (Z direction) of the sheet set package 200 was 2.5% or more and 6.0% or less, both the sheet removability and the pack compactness were good (Examples 1 and 2).

[0103] On the other hand, when the firmness AF in the height direction (Z direction) of the sheet set package 200 exceeded 6.0%, the pack compactness was poor (Comparative Example 1), and when it was less than 2.5%, the sheet removability was poor (Comparative Example 2).

[0104] Although the embodiments of the present invention have been described above, 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

[0105] 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 H2 Height (before loading) H3 height (after load)

Claims

1. An assembly in which a plurality of sheet laminates each formed by laminating a plurality of tissue papers, a packaging bag made of low-density polyethylene film for containing the sheet laminate, and an outlet formed on the top surface of the packaging bag through which the tissue paper is drawn out are integrated, A sheet set packaging body having a collective packaging bag made of low-density polyethylene film for containing the assembly, 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 assembly is formed by integrating a plurality of the sheet packages such that the height direction of the sheet package is the height direction of the sheet set packaging body, The assembly is accommodated in the collective packaging bag in a state where the long side surface of the sheet laminate is compacted against the corresponding side surface of the assembly and the side surface is tightened, The sheet set packaging body, wherein the firmness (AF) in the height direction of the sheet set packaging body is 2.5% or more and 6.0% or less.

2. The sheet set packaging body according to claim 1, wherein the sheet package is one in which the sheet laminate is caramel-wrapped.

3. The sheet set packaging body according to claim 1, wherein the ratio of the height of the sheet set packaging body to the total height of the sheet laminate before packaging is less than 90%.

Images