JP2024092369A - Sheet collective packaging body, and sheet packaging body - Google Patents

Abstract

To provide a sheet collective packaging body capable of maintaining load efficiency, while improving productivity of sheet packaging bodies which are stored.SOLUTION: A sheet collective packaging body includes: rectangular parallelepiped sheet laminates in each of which a plurality of sheets is laminated; packaging bags each made of a resin film for storing the sheet laminate; sheet packaging bodies each including a take-out port which is formed in a top surface of the packaging bag, and from which each sheet is drawn out; and a packaging box made of a corrugated cardboard for storing the plurality of sheet packaging bodies. In the sheet laminate, the sheets are laminated by a multi-stand type inter-folder. In the sheet packaging body, the sheet laminate is caramel-packaged. In the sheet packaging body, hardness (ARH) in the height direction of the collective body in which five sheet packaging bodies are stacked in a height direction of the sheet packaging body is equal to or greater than 2.8% and equal to or less than 7.2%.SELECTED DRAWING: Figure 4

Description

The present invention relates to a sheet assembly package and a sheet package.

For sanitary thin paper such as tissue paper, the carton type in which the web is housed in a cardboard box is widespread, but in recent years, from the standpoint of transportation, storage, disposal, environmental impact, cost, etc., there has been an increasing demand for film packs in which the web is housed in a packaging bag made of resin film.

In the manufacture of film packs, a rotary interfolder is used to align the sides of the web when it is placed in a packaging bag, to prevent the web from becoming compacted, which reduces the ease of removal of the sanitary tissue paper (see, for example, Patent Document 1).

In addition, film packs are transported and stored in a multi-tiered case (see, for example, Patent Document 2).

JP 2018-102858 A Utility Model Registration No. 3233887

However, when manufacturing film packs using a rotary interfolder, the web supply capacity is low, making it difficult to increase the productivity of film packs.

In addition, if a multi-stand interfolder, which has a high web supply capacity, is used instead of a rotary interfolder, the productivity of film packs will improve, but the sides of the web will not be aligned, and the volume of the film packs will increase accordingly. As a result, during transportation and storage, it will not be possible to pack the same number of film packs in a conventional case that is used to pack multiple film packs (loading efficiency will decrease).

The objective of the present invention is to provide a sheet assembly package that can maintain loading efficiency while improving the productivity of the stored sheet packages.

The first aspect of the present invention provides a sheet assembly packaging body having a rectangular parallelepiped sheet laminate in which multiple sheets are stacked, a packaging bag made of resin film that contains the sheet laminate, a sheet packaging body having an outlet formed on the top surface of the packaging bag through which the sheets are pulled out, and a cardboard packaging box that contains multiple sheet packaging bodies, in which the sheets are stacked in a multi-stand type interfolder, the sheet packaging body is a caramel-wrapped sheet laminate, and the sheet packaging body provides a sheet assembly packaging body in which five of the sheet packaging bodies are stacked in the height direction of the sheet packaging body, and the height direction stiffness (ARH) of the assembly is 2.8% to 7.2%.

In this specification, a multi-stand interfolder refers to a device that produces a web by folding and stacking sheets alternately with a single folding plate. When sheets are stacked in a multi-stand interfolder, if the sheet stack is rectangular, the pair of long sides tend to become misaligned (the folds in the sheets tend to be misaligned in the stacking direction).

Caramel packaging refers to packaging in which both ends of a tubular film are folded and glued or sealed into a packaging bag.

The height stiffness (ARH) of an assembly in which five of the sheet packaging bodies are stacked in the height direction of the sheet packaging bodies indicates the ratio [(A-B)/(A)] x 100(%) of the difference (A-B) between the height (A) before loading and the height (B) after loading of the assembly when a weight of a specified weight (e.g., 600 g) is placed on the top surface of the assembly.

In the first aspect, the sheet stack contained in the packaging bag made of resin film is stacked in a multi-stand type interfolder with high sheet supply capacity, so that the productivity of the sheet packaging body constituting the sheet assembly packaging body can be improved.

In the first aspect, the sheet laminate is caramel-wrapped, so that the sheet laminate is stored in a packaging bag while being tightened in the height direction of the sheet laminate, in the direction in which the long sides of the sheet laminate face each other, and in the direction in which the short sides of the sheet laminate face each other. This allows the sheet packaging to be stored in a packaging box with the entire sheet laminate being compacted.

In addition, in the first aspect, the sheet stack is stored in a packaging bag in a tightened state in the direction in which the long sides of the sheet stack face each other, so that the long sides of the sheet stack stacked in the multi-stand interfolder, which tend to become misaligned, can be compacted. This makes it possible to prevent an increase in the capacity of each sheet package stored in a packaging box in the direction in which the long sides of the sheet stack face each other, and maintain the loading efficiency of the sheet assembly package.

In addition, in the first embodiment, compaction is applied to the non-uniform long sides, resulting in the sheet stack expanding in the height direction. However, since the sheet stack is also compressed in the height direction during caramel packaging, compaction can also be applied in the height direction of the sheet stack. This makes it possible to prevent an increase in the capacity of each sheet package contained in the packaging box in the height direction of the sheet stack, and maintain the loading efficiency of the sheet assembly package.

Furthermore, in the first embodiment, the height stiffness (ARH) of the assembly of sheet packaging bodies is 2.8% or more and 7.2% or less, so that each sheet packaging body contained in the packaging box is in a state of being subjected to moderate compaction. Therefore, even if the long sides of the sheet stack are not uniform, the long sides of the sheet stack contained in the packaging bag are not crushed, so that it is possible to prevent a decrease in the ease of removing the sheets when the sheet packaging body is used.

The second aspect of the present invention provides the sheet assembly package according to the first aspect, in which the sheet stack is stacked so that the direction in which the sheets are pulled out is the CD direction.

In this specification, the CD direction refers to the direction perpendicular to the flow direction (MD direction) of the fibers that make up the sheet. "The direction in which the sheet is pulled out is the CD direction" means that the sheet moves in the CD direction when it is pulled out from the outlet of the sheet packaging, and also moves in the CD direction when the sheet is stacked inside the packaging.

When sheets are stacked in a multi-stand interfolder, the sheets are usually stacked so that the direction in which the sheets are pulled out is the CD direction.

In the second aspect, the sheet stack is stacked so that the sheet is pulled out in the CD direction, and is stacked in a multi-stand interfolder with high supply capacity, which improves the productivity of the individual sheet packages that make up the sheet assembly package.

The third aspect of the present invention provides the sheet assembly packaging body according to the first or second aspect, in which the sheet stack is contained in the packaging bag so that the stacking direction of the sheet stack is the height direction of the sheet packaging body.

In the third aspect, the stacking direction of the sheet laminate is the height direction of the sheet packaging body, so that when the sheet laminate is caramel-packaged, compaction can be reliably applied to the uneven long sides of the sheet laminate stacked in the multi-stand interfolder. In addition, compaction can be reliably applied to the height direction in which the sheet laminate swells as a result of compacting the uneven long sides.

The fourth aspect of the present invention provides the sheet assembly packaging body according to the third aspect, in which the sheet packaging body is stacked in a plurality of pieces and stored in the packaging box so that the height direction of the sheet packaging body is the height direction of the packaging box.

In the fourth aspect, the height direction of the sheet wrapping body is the height direction of the packaging box, and the stacking direction of the sheet stack is the height direction of the packaging box. In addition, since the sheet wrapping body is compacted in the height direction of the sheet stack, even if multiple sheet wrapping bodies are stacked and contained in the packaging box so that the height direction of the sheet wrapping body is the height direction of the packaging box, it is possible to prevent the packaging box from expanding in the height direction of the packaging box.

The fifth aspect of the present invention provides the sheet assembly packaging body according to the third aspect, in which the sheet packaging body is stored in the packaging box in a row with the long sides of the sheet stack facing each other.

In the fifth aspect, the sheet packaging body is compacted in the direction in which the long sides of the sheet stack face each other, so that even if multiple sheet packaging bodies are arranged in a packaging box in the direction in which the long sides of the sheet stack face each other, the packaging box can be prevented from expanding in a direction perpendicular to the height direction of the packaging box.

The sixth aspect of the present invention is a sheet packaging body that is housed in the packaging box of the sheet assembly packaging body of any one of the first to fifth aspects.

In the sixth aspect, the sheet wrapping body constitutes the sheet assembly wrapping body described above, thereby providing the same effects as the sheet wrapping body used in the sheet assembly wrapping body described above.

According to one aspect of the present invention, it is possible to provide a sheet assembly package that can maintain loading efficiency while improving the productivity of the stored sheet packages.

FIG. 2 is a diagram showing a sheet packaging body (individually packaged body). FIG. 2 is a diagram showing a sheet stack contained in a sheet wrapping body (individually wrapped body). 4 is an enlarged view of the sheet stack before packaging, seen from one end surface side. FIG. FIG. 13 is a diagram showing a state (before loading) in which the stiffness (ARH) of an assembly of sheet wrapping bodies is measured. FIG. 13 is a diagram showing the state (after loading) in which the stiffness (ARH) of an assembly of sheet wrapping bodies is measured. FIG. 4 is an enlarged view of the sheet stack before packaging, seen from one end surface side. FIG.

The following describes in detail an embodiment of the present invention with reference to the drawings. Parts common to each drawing may be given the same reference numerals and descriptions thereof may be omitted. Also, the scale of each component in each drawing may differ from the actual scale.

In this specification, the directions of the figures are explained using a three-dimensional Cartesian coordinate system with three axial directions (X, Y, and Z directions). In each figure, the left-right direction (the lengthwise direction of the sheet packaging body or sheet assembly packaging body) is the X direction, the front-rear direction (the widthwise direction of the sheet packaging body or sheet assembly packaging body) is the Y direction, and the up-down direction (the height direction of the sheet packaging body or packaging box) is the Z direction.

In addition, in this specification, deviations in each direction are permitted to the extent that they do not impair the function and effect of the embodiment. Also, perpendicular may include approximately perpendicular.

<Sheet packaging body>
Fig. 1 shows a sheet packaging body (individually wrapped body) according to an embodiment. Fig. 2 shows a sheet stack housed in the sheet packaging body (individually wrapped body). Fig. 3 is an enlarged view of the sheet stack before packaging, as viewed from one end surface side.

The sheet packaging body 100 according to this embodiment has a sheet laminate 10 and a packaging bag 20. In this embodiment, the sheet laminate 10 is contained in the packaging bag 20 so that the stacking direction (SD direction) of the sheets 10A is the height direction (Z direction) (FIGS. 1 and 2). The sheet packaging body 100 is an example of a sheet packaging body according to this embodiment.

The sheet stack 10 is made up of multiple sheets (or multiple sets) of sheets 10A stacked together (Figure 2). The shape of the sheet stack 10 is a rectangular parallelepiped. The sheet stack 10 is designed so that the sheets 10A can be pulled out one by one (or one set by one) through an outlet 21A formed on the top surface 21 of the packaging bag 20 (see Figure 1).

The material of the sheet 10A is not particularly limited, and may be, for example, paper, nonwoven fabric, or cloth, and is preferably tissue paper. When the sheet is tissue paper, the pulp composition may be a known composition for tissue paper. The blending ratio of pulp may be, for example, 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

The basis weight of the sheet 10A is not particularly limited, but is preferably 5 g/m ² or more and 80 g/m ² or less in the case of paper, and 20 g/m ² or more and 100 g/m ² or less in the case of nonwoven fabric, depending on the number of plies. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

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 used. For example, if the sheet is tissue paper, the thickness of the tissue paper can be 50 μm or more and 500 μm or less per ply (or two plies in the case of two plies), and is preferably 60 μm or more and 330 μm or less.

In addition, from the viewpoint of pulling out the sheets 10A one by one or one set at a time, the sheet stack 10 is preferably one in which the sheets 10A are folded and stacked alternately (a so-called pop-up type sheet stack 10). In addition, the form of the sheet stack 10 is not limited to one that can be pulled out in a pop-up type, and it may be one in which multiple sheets (or multiple sets) of sheets 10A are simply stacked, or one in which each sheet 10A is stacked in a folded state.

The dimensions of the sheet laminate 10 can be such that the length in the longitudinal direction (X direction) of the sheet wrapping body 100 is 155 mm or more and 230 mm or less, the length in the transverse direction or depth direction (Y direction) perpendicular to the longitudinal direction (X direction) of the sheet wrapping body 100 is 90 mm or more and 120 mm or less, and the thickness in the height direction or thickness direction (Z direction) is 30 mm or more and 100 mm or less.

The form of the sheet 10A constituting the sheet laminate 10 is not particularly limited, and can be applied to, for example, sanitary thin papers such as tissue paper, toilet paper, kitchen paper, and paper towels. Sanitary thin papers such as tissue paper and paper towels also include sanitary thin papers containing moisturizing ingredients (for example, lotion tissue). The use of the sheet 10A is also not particularly limited, and can be applied to industrial, household, and portable uses. Among these, it is preferably used for household tissue paper.

The sheet stack is made by stacking sheets 10A in a multi-stand interfolder. Here, the multi-stand interfolder is a device that produces a web by folding and stacking sheets alternately with a single folding plate.

When the sheet stack 10 is a rectangular parallelepiped, in which sheets are stacked in a multi-stand interfolder, as shown in FIG. 2, the pair of long sides 13, 14 of the sheet stack 10 viewed in the longitudinal direction (X direction) from one short side 15 of the sheet stack 10 tend to become misaligned (the folds of the sheets tend to be misaligned in the stacking direction).

The sheet laminate 10 is laminated so that the direction in which the sheets 10A are pulled out is the CD direction (a direction perpendicular to the flow direction (MD) of the fibers that make up the sheets 10A).

The fact that the direction in which the sheet 10A is pulled out is the CD direction means that the movement direction of the sheet 10A when the sheet 10A is pulled out from the outlet 21A of the sheet packaging body 100 is the CD direction, and also means that the movement direction of the sheet 10A in the state of the sheet stack 10 inside the sheet packaging body 100 is the CD direction.

The sheet stack 10 in which the sheets 10A are stacked so that the pull-out direction is the CD direction is preferably a multi-stand type interfolder. The sheet stack 10 in which the sheets are stacked in a multi-stand type interfolder usually constitutes a sheet stack in which the sheets are stacked so that the pull-out direction is the CD direction.

The sheet stack 10 stacked in a conventional rotary interfolder is usually stacked so that the direction in which the sheets are pulled out is the MD direction. In addition, when the sheet stack 10 stacked in a rotary interfolder is a rectangular parallelepiped, as shown in FIG. 7, a pair of long sides 13', 14' when viewed in the longitudinal direction (X direction) from one short side 15' of the sheet stack 10 is likely to be aligned (the folds of the sheets are less likely to be misaligned in the stacking direction SD).

The packaging bag 20 contains the sheet laminate 10.

When the sheet laminate 10 is contained in the packaging bag 20, the packaging bag 20 has a top surface 21, a bottom surface 22, a front surface 23, a back surface 24, and side surfaces 25 and 26. In the packaging bag 20, the top surface 21 and the bottom surface 22 face each other in the up-down direction (Z direction), the front surface 23 and the back surface 24 face each other in the front-to-back direction (Y direction), and the side surfaces 25 and 26 face each other in the left-to-right direction (X direction). The side surfaces 25 and 26 are continuous with the top surface 21, the bottom surface 22, the front surface 23, and the back surface 24 (see FIG. 1).

The top surface 21 of the packaging bag 20 is provided with an outlet 21A. The outlet 21A allows the sheet 10A to be pulled out. The form of the outlet 21A is not particularly limited, and can be, for example, a continuous cut or a long, thin opening. The shape of the opening is not particularly limited, and can be a straight line, a wavy line, a rectangle, an oval, a dumbbell shape, or the like. These cuts and openings may be formed by breaking perforations (intermittent cuts) (see FIG. 1).

The length of the outlet 21A in the longitudinal direction (X direction) is not particularly limited, and is, for example, 40% to 100% of the total length in the longitudinal direction (X direction) of the top surface 21 of the packaging bag 20 of the sheet packaging body 100, preferably 45% to 90%, and more preferably 50% to 80%.

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 examples of resins that can be used include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), and other resins. As the polyethylene, high-density polyethylene, low-density polyethylene, and the like can be used.

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

The material from which the packaging bag 20 is made can be biodegradable (biodegradable plastics such as polylactic acid) or biomass material (renewable organic resources derived from living organisms, such as biomass film, excluding fossil resources).

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

The thickness of the resin film forming the packaging bag 20 is not particularly limited, and is preferably 20 μm or more and 100 μm or less, and more preferably 25 μm or more and 70 μm or less. By making the thickness of the resin film 20 μm or more, sufficient strength as the packaging bag 20 in which the sheet 10A is contained can be ensured. In addition, by making the thickness of the resin film 100 μm or less, the flexibility and light weight of the packaging bag 20 can be ensured, and costs can be reduced.

The sheet packaging body 100 is a sheet laminate 10 that has been caramel-packaged. Here, caramel packaging is a form of packaging in which both ends of a cylindrical resin film are folded and sealed. Caramel packaging makes it easy to control the compaction of the sheet laminate 10 (see Figure 1).

In caramel packaging, the sheet laminate 10 is wrapped in a resin film by rolling it into a cylindrical shape with both ends in the longitudinal direction (X direction) open, and the overlapping parts in the rolling direction are bonded by fusion processing or adhesive. Next, both ends in the longitudinal direction (X direction) of the cylindrical resin film are folded onto the end face side of the sheet laminate 10, and at least the leading edge portions of the roughly triangular or roughly trapezoidal pieces formed in this process are overlapped and bonded by fusion processing or adhesive to seal the opening of the cylindrical shape. In this embodiment, both ends of the cylindrical resin film (sides 25, 26 of the packaging bag 20) are folded and sealed (see Figure 1).

In the sheet packaging body 100, the sheet laminate 10 is contained in the packaging bag 20 so that the stacking direction SD of the sheet laminate 10 is the height direction (Z direction) of the sheet packaging body 100. Specifically, the sheet laminate 10 contained in the packaging bag 20 has the top surface 11, bottom surface 12, long side surface 13, long side surface 14, short side surface 15, and short side surface 16 of the sheet laminate 10 facing the top surface 21, bottom surface 22, front surface 23, back surface 24, side surface 25, and side surface 26 of the packaging bag 20, respectively.

In the sheet packaging body 100, when the sheet laminate 10 is caramel-packaged, the sheet laminate 10 is placed in the packaging bag 20 with the entire sheet laminate 10 being clamped.

Specifically, when the sheet laminate 10 is caramel-wrapped, compaction (compression) C1 is applied in the height direction (Z direction) of the sheet laminate 10, compaction (compression) C2 is applied in the direction in which the long sides 13, 14 of the sheet laminate 10 face each other (Y direction), and compaction (compression) C3 is applied in the direction in which the short sides 15, 16 of the sheet laminate face each other (X direction).

The sheet packaging body 100 has a stiffness (ARH) in the height direction (Z direction) of the assembly 30, which is formed by stacking five sheet packaging bodies 100 in the height direction (Z direction) of the sheet packaging body 100, of 2.8% to 7.2%, preferably 3.0% to 7.0%, and more preferably 3.2% to 6.8%.

Here, the stiffness (ARH) in the height direction (Z direction) of the assembly 30 formed by stacking five sheet wrapping bodies 100 in the height direction (Z direction) of the sheet wrapping bodies 100 refers to the ratio [(A-B)/(A)] x 100(%) of the difference (A-B) between the height (A) before loading and the height (B) after loading of the assembly 30 when a weight of a predetermined weight (e.g., 600 g) is placed on the top surface of the assembly 30.

Specifically, the state of the assembly 30 before loading is determined as follows (Figure 4) when an acrylic plate 60 with marks (marks 61-64) made in four places is placed on the top surface 31 of the assembly 30 (an assembly of five stacked sheet packaging bodies 100). The state of the assembly 30 after loading is determined as follows (Figure 5) when a 600 g weight 70 is placed on the acrylic plate 60. The hardness (ARH) is calculated by applying the average of the heights before loading and the average of the heights after loading at the four places with marks 61-64 to the above formula.

The hardness (ARH) of the aggregate 30 can be controlled by adjusting the compactions C1 to C3 when the sheet stack 10 is caramel-wrapped.

<Sheet assembly packaging>
6 shows a sheet assembly package 200. The sheet assembly package 200 includes a plurality of sheet packages 100 and a packaging box 40. In this embodiment, 30 sheet packages 100 are contained in the packaging box 40.

A plurality of sheet wrapping bodies 100 are stacked and housed in a packaging box 40 so that the height direction (Z direction) of the sheet wrapping body 100 is the height direction (Z direction) of the packaging box. In this embodiment, five of the above-mentioned sheet wrapping bodies 100 are stacked in the vertical direction (Z direction) to form an assembly 30 so that the top surface 21 and bottom surface 22 of the packaging bag 20 of the sheet wrapping body 100 face each other (Figure 6).

The sheet wrapping bodies 100 are arranged in a plurality of rows in the direction in which the long sides 13, 14 of the sheet laminate 10 face each other (Y direction) and are contained in the packaging box 40. In this embodiment, three assemblies 30 are arranged in the packaging box 40 in the front-to-rear direction (Y direction) so that the long side 14 of one sheet laminate 10 faces the long side 13 of another sheet laminate 10 (Fig. 6).

Furthermore, the sheet wrapping bodies 100 are arranged in a row in the direction in which the short sides 15, 16 of the sheet laminate 10 face each other (Y direction) and are contained in the packaging box 40. In this embodiment, the two assemblies 30 are arranged in the left-right direction (X direction) of the packaging box 40 so that the short side 16 of one sheet laminate 10 faces the short side 15 of another sheet laminate 10 (Figure 6).

The number of sheet wrapping bodies 100 contained in the packaging box 40 is not limited, and may be two or more. However, from the viewpoint of utilizing existing transportation facilities, the number of sheet wrapping bodies 100 contained in the packaging box 40 is preferably 10 to 100, and more preferably 20 to 36.

The packaging box 40 is made of corrugated cardboard. The corrugated cardboard that constitutes the packaging box 40 is made by attaching a liner to one or both sides of a corrugated core. The corrugated cardboard is not particularly limited, and examples include single-sided corrugated cardboard, double-sided corrugated cardboard, and triple-double-sided corrugated cardboard. In this embodiment, type A corrugated cardboard is used as the corrugated cardboard.

In addition, the dimensions of the packaging box 40 are not particularly limited and can be changed depending on the number of sheet packaging bodies to be stored.

When multiple sheet packaging bodies 100 are housed in the packaging box 40, the packaging box 40 has a top surface 41, a bottom surface 42, a front surface 43, a back surface 44, and side surfaces 45 and 46. In the packaging box 40, the top surface 41 and the bottom surface 42 face each other in the up-down direction (Z direction), the front surface 43 and the back surface 44 face each other in the front-to-back direction (Y direction), and the side surfaces 45 and 46 face each other in the left-to-right direction (X direction). The side surfaces 45 and 46 are continuous with the top surface 41, the bottom surface 42, the front surface 43, and the back surface 44 (see FIG. 6).

The top surface 41 of the packaging box 40 is composed of a pair of flaps and a lid (neither shown), and has an open opening before the multiple sheet wrapping bodies 100 are stored. After the multiple sheet wrapping bodies 100 are stored, the opening of the top surface 41 is closed by the pair of flaps and the lid.

As described above, in the sheet assembly packaging body 200 of this embodiment, the sheet stack 10 contained in the packaging bag 20 made of resin film is stacked in a multi-stand type interfolder that has a high supply capacity of the sheets 10A, so the productivity of the sheet packaging body 100 that constitutes the sheet assembly packaging body 200 can be improved.

In addition, in this embodiment, as described above, the sheet laminate 10 is caramel-wrapped, so that the sheet laminate 10 is contained in the packaging bag 20 in a state in which it is tightened in all directions, that is, in the height direction (Z direction) of the sheet laminate 10, in the direction in which the long sides 13, 14 of the sheet laminate 10 face each other (Y direction), and in the direction in which the short sides 15, 16 of the sheet laminate 10 face each other (X direction). This allows the sheet packaging body 100 to be contained in the packaging box 40 in a state in which the entire sheet laminate 10 is compacted.

In addition, in this embodiment, as described above, the sheet stack 10 is stored in the packaging bag 20 in a tightened state in the direction in which the long sides 13, 14 of the sheet stack 10 face each other (Y direction), so that the long sides 13, 14 of the sheet stack 10 stacked in the multi-stand type interfolder, which are prone to becoming misaligned, can be compacted. Therefore, it is possible to prevent an increase in the capacity of each sheet packaging body 100 stored in the packaging box 40 in the direction in which the long sides 13, 14 of the sheet stack 10 face each other (Y direction), and the loading efficiency of the sheet assembly packaging body 200 can be maintained.

In addition, in this embodiment, as described above, compaction is applied to the misaligned long sides 13, 14, resulting in the sheet stack 10 expanding in the height direction (Z direction). However, since the sheet stack 10 is also tightened in the height direction (Z direction) during caramel packaging, compaction can also be applied in the height direction (Z direction) of the sheet stack 10. Therefore, an increase in the capacity of each sheet packaging body 100 contained in the packaging box 40 can be prevented in the height direction (Z direction) of the sheet stack 10, and the loading efficiency of the sheet assembly packaging body 200 can be maintained.

Furthermore, in this embodiment, as described above, the stiffness (ARH) in the height direction (Z direction) of the assembly 30 of the sheet wrapping bodies 100 is 2.8% or more and 7.2% or less, so that each sheet wrapping body 100 contained in the packaging box 40 is in a state of being subjected to moderate compaction. Therefore, even if the long sides 13, 14 of the sheet stack 10 are not aligned, the long sides 13, 14 of the sheet stack 10 contained in the packaging bag 20 are not crushed, so that the ease of removal of the sheet 10A can be prevented from decreasing when the sheet wrapping body 100 is used.

In this embodiment, as described above, the sheet stack 10 is stacked so that the direction in which the sheets 10A are pulled out is the CD direction, and is stacked in a multi-stand type interfolder with high supply capacity, so the productivity of the individual sheet packages 100 that make up the sheet assembly package 200 can be improved.

In this embodiment, as described above, the stacking direction SD of the sheet laminate 10 is the height direction (Z direction) of the sheet packaging body 100, so that when the sheet laminate 10 is caramel-packaged, the uneven long sides 13, 14 of the sheet laminate 10 stacked in the multi-stand interfolder can be reliably compacted. In addition, as a result of compacting the uneven long sides 13, 14, the sheet laminate 10 can also be reliably compacted in the height direction (Z direction) in which it swells.

In this embodiment, as described above, the height direction (Z direction) of the sheet wrapping body 100 coincides with the height direction (Z direction) of the packaging box 40, and therefore the stacking direction SD of the sheet laminate 10 coincides with the height direction (Z direction) of the packaging box 40. In addition, since the sheet wrapping body 100 is subjected to compaction in the height direction (Z direction) of the sheet laminate 10, even if a plurality of sheet wrapping bodies 100 are stacked and contained in the packaging box 40 so that the height direction (Z direction) of the sheet wrapping body 100 coincides with the height direction (Z direction) of the packaging box 40, it is possible to prevent the packaging box 40 from expanding in the height direction (Z direction) of the packaging box 40.

In this embodiment, as described above, the sheet wrapping body 100 is compacted in the direction in which the long sides 13, 14 of the sheet laminate 10 face each other (Y direction). Therefore, even if multiple sheet wrapping bodies 100 are arranged in the direction in which the long sides 13, 14 of the sheet laminate 10 face each other (Y direction) and stored in the packaging box 40, the packaging box 40 can be prevented from expanding in a direction perpendicular to the height direction (Z direction) of the packaging box 40.

In addition, since the sheet wrapping body 100 of this embodiment constitutes the sheet assembly wrapping body 200 of this embodiment as described above, the effects of the sheet wrapping body 100 used in the sheet assembly wrapping body 200 can be obtained as is.

Specifically, in the sheet packaging body 100 of this embodiment, as described above, the sheet stack 10 contained in the packaging bag 20 made of resin film is stacked in a multi-stand type interfolder that has a high supply capacity of the sheets 10A, so that the productivity of the sheet packaging body 100 that constitutes the sheet assembly packaging body 200 can be improved.

In addition, in the sheet packaging body 100 of this embodiment, as described above, the sheet laminate 10 is caramel-packed, so that the sheet laminate 10 is stored in the packaging bag 20 in a state where it is tightened in all directions, that is, the height direction (Z direction) of the sheet laminate 10, the direction in which the long sides 13, 14 of the sheet laminate 10 face each other (Y direction), and the direction in which the short sides 15, 16 of the sheet laminate 10 face each other (X direction). This allows the sheet packaging body 100 to be stored in the packaging box 40 in a state where the entire sheet laminate 10 is compacted.

In addition, in the sheet packaging body 100 of this embodiment, as described above, the sheet stack 10 is stored in the packaging bag 20 in a tightened state in the direction in which the long sides 13, 14 of the sheet stack 10 face each other (Y direction), so that the long sides 13, 14 of the sheet stack 10 stacked in the multi-stand type interfolder, which are prone to becoming misaligned, can be compacted. Therefore, it is possible to prevent an increase in the capacity of each sheet packaging body 100 stored in the packaging box 40 in the direction in which the long sides 13, 14 of the sheet stack 10 face each other (Y direction), and the loading efficiency of the sheet assembly packaging body 200 can be maintained.

In addition, in the sheet packaging body 100 of this embodiment, as described above, compaction is applied to the misaligned long sides 13, 14, resulting in the sheet stack 10 expanding in the height direction (Z direction). However, since the sheet stack 10 is also tightened in the height direction (Z direction) during caramel packaging, compaction can also be applied in the height direction (Z direction) of the sheet stack 10. Therefore, an increase in the capacity of each sheet packaging body 100 contained in the packaging box 40 can be prevented in the height direction (Z direction) of the sheet stack 10, and the loading efficiency of the sheet assembly packaging body 200 can be maintained.

In addition, as described above, in the sheet packaging body 100 of this embodiment, the stiffness (ARH) in the height direction (Z direction) of the assembly 30 of the sheet packaging bodies 100 is 2.8% or more and 7.2% or less, so that each sheet packaging body 100 contained in the packaging box 40 is in a state of being subjected to moderate compaction. Therefore, even if the long sides 13, 14 of the sheet stack 10 are not aligned, the long sides 13, 14 of the sheet stack 10 contained in the packaging bag 20 are not crushed, so that the ease of removal of the sheet 10A can be prevented from decreasing when the sheet packaging body 100 is used.

In addition, in the sheet wrapping body 100 of this embodiment, as described above, the sheet stack 10 is stacked so that the direction in which the sheet 10A is pulled out is the CD direction, and is stacked in a multi-stand type interfolder with high supply capacity, so the productivity of the individual sheet wrapping bodies 100 that make up the sheet assembly wrapping body 200 can be improved.

Furthermore, in the sheet packaging body 100 of this embodiment, as described above, the stacking direction SD of the sheet stack 10 is the height direction (Z direction) of the sheet packaging body 100, so that when the sheet stack 10 is caramel-packaged, compaction can be reliably applied to the uneven long sides 13, 14 of the sheet stack 10 stacked in the multi-stand type interfolder. In addition, as a result of compacting the uneven long sides 13, 14, compaction can also be reliably applied to the height direction (Z direction) in which the sheet stack 10 swells.

The present invention will now be described in more detail with reference to examples. The evaluation of the examples and comparative examples was carried out under the following conditions.

[Sheet packaging (individually wrapped)]
The tissue paper (sheet laminate) in which sheets 10A are alternately folded as the sheet laminate 10 and stacked so that they can be pulled out one by one in a pop-up style is caramel-wrapped in a packaging bag 20 (with a dumbbell-shaped removal opening 21A formed on the top surface 21) made of polyethylene with a thickness of about 40 μm to prepare a sheet package 100 (individually packaged body) (see FIGS. 1 and 2).

[Productivity]
The productivity of the sheet package was evaluated based on the folding state of the sheet laminate. The evaluation of the take-out property was performed based on the following criteria.
〔Evaluation criteria〕
〇: High productivity (when stacked with a multi-stand type interfolder (stand type))
×: Low productivity (when stacking with a rotary interfolder (rotary type))

[Compactness rate (compactness)]
The ratio of the height of the individual package after packaging to the height before packaging was measured as the compaction rate. The compactness was evaluated based on the compaction rate. The compactness was evaluated according to the following criteria.
〔Evaluation criteria〕
◯: Good (compaction rate is 82% to 91%)
×: Poor (when the compaction rate is less than 82% (tight) or when the compaction rate is 92% or more (loose))

[Assemblage stiffness (ARH)]
The stiffness (ARH) in the height direction of the assembly 30 in which five sheet wrapping bodies 100 are stacked in the height direction (Z direction) of the sheet wrapping bodies 100 is measured. In measuring the stiffness (ARH), an acrylic plate 60 having a thickness (Z direction) of 2 mm, a length (Y direction) of 165 mm, and a width (X direction) of 320 mm is placed on the top surface 31 of the assembly 30, and the height from the ground on which the assembly 30 is placed to four points (marks 61 to 64) on the acrylic plate 60 is measured, and the average value of the heights up to the four points is defined as the height before the load HA (FIG. 4). A weight 70 weighing 600 g is placed in the center of the acrylic plate 60, and the height from the ground on which the assembly 30 is placed to four points (marks 61 to 64) on the acrylic plate 60 is measured, and the average value of the heights up to the four points is defined as the height after the load HB. The pressing amount DH is calculated by subtracting the height after the load HB from the height before the load HA. Then, (pressure DH/height before load HA)×100 is defined as hardness (ARH).

[Removability]
The sheets 10A of the sheet laminate 10 were checked for tearing when the sheets 10A were pulled out one by one from the individual package (the take-out opening 21A formed on the top surface 21 of the packaging bag 20). The take-out property was evaluated according to the following criteria.
〔Evaluation criteria〕
〇: Good (sheet not torn when removed)
×: Defective (sheet torn when removed)

For Examples 1 to 4 and Comparative Examples 1 to 6, the basis weight, paper thickness (2 plies), number of plies, number of sets, sheet dimensions (length (MD direction), width (CD direction)), sheet area, web bulk (height), compaction rate, individual package dimensions (width, depth, height), pack volume, weight inside the pack, pack density, web folding mode (fold), and packaging form of the individual packages, as well as the 5-pack height, 600 g load height, height difference, hardness ARH, and removal ability of each individual package are shown in Table 1.

As can be seen from Table 1, when the stiffness (ARH) in the height direction (Z direction) of the assembly 30 of individually wrapped products caramel-wrapped from the sheet laminate stacked in the multi-stand type interfolder is 2.8% or more and 7.2% or less, the productivity of the individually wrapped products is high, and both the compactness and ease of removal are good (Examples 1 to 4).

On the other hand, when the stiffness (ARH) in the height direction (Z direction) of the assembly 30 exceeded 7.2%, the compactness of the individual package was poor (Comparative Examples 1 and 2), and when it was less than 2.8%, both the compactness and ease of removal of the individual package were poor (Comparative Example 3). Furthermore, the assembly 30 of individual packages in which the sheet laminates stacked in a rotary interfolder were packaged had low productivity (Comparative Examples 4 to 6). Furthermore, the assembly 30 of pillow-packaged individual packages had poor compactness because no compaction was applied (Comparative Example 6).

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

100 Sheet packaging body 10 Sheet laminate 10A Sheet 11 Top surface 12 Bottom surface 13, 14 Long side surface 15, 16 Short side surface 20 Packaging bag 21 Top surface 21A Discharge opening 22 Bottom surface 23 Front surface 24 Rear surface 25, 26 Side surface SD Stacking direction 30 Assembly 31 Top surface 40 Packaging box 41 Top surface 42 Bottom surface 43 Front surface 44 Rear surface 45, 46 Side surface 60 Acrylic plate 61, 62, 63, 64 Mark 70 Weight 200 Sheet assembly packaging body

Claims (6)

a sheet packaging body including a rectangular parallelepiped sheet laminate in which a plurality of sheets are laminated, a packaging bag made of a resin film for accommodating the sheet laminate, and an outlet formed on a top surface of the packaging bag for pulling out the sheets;
A cardboard packaging box for accommodating a plurality of the sheet packaging bodies,
The sheet laminate is formed by stacking the sheets in a multi-stand type interfolder,
The sheet wrapping body is a caramel-wrapped sheet laminate,
The sheet packaging body is a sheet assembly packaging body, in which an assembly of five of the sheet packaging bodies stacked in the height direction of the sheet packaging body has an ARH in the height direction of 2.8% or more and 7.2% or less. The sheet assembly packaging body according to claim 1, wherein the sheet stack is stacked so that the direction in which the sheets are pulled out is the CD direction. The sheet assembly packaging body according to claim 1, in which the sheet stack is contained in the packaging bag so that the stacking direction of the sheet stack is the height direction of the sheet packaging body. The sheet assembly packaging body according to claim 3, wherein the sheet packaging body is stacked in a plurality of layers and contained in the packaging box such that the height direction of the sheet packaging body is the height direction of the packaging box. The sheet assembly packaging body according to claim 3, wherein the sheet packaging body is contained in the packaging box in such a manner that the long sides of the sheet stack are arranged in a direction facing each other. A sheet packaging body that is housed in the packaging box of the sheet assembly packaging body described in any one of claims 1 to 5.

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