JP2024123491A - Sheet packaging - Google Patents

Abstract

To provide a sheet package which enables easy replenishment of a sheet.SOLUTION: A sheet package has: a sheet laminate including a plurality of sheets laminated and having rectangular parallelepiped shape; and a packaging member wound around a top surface, a bottom surface, and a pair of facing side surfaces of the sheet laminate. The packaging member has an overlapping part in which both longitudinal ends of the packaging member overlap in a state that the packaging member is wound around the sheet laminate. The overlapping part has: a first bonding part in which both ends of the packaging member are bonded and which extends from one end edge side in a width direction orthogonal to a longitudinal direction of the packaging member to the center part side of the overlapping part; a second bonding part in which both ends of the packaging member are bonded and which extends from the center part side of the overlapping part to the other end edge side in the width direction; and a non-bonding part which is located between the first bonding part and the second bonding part and in which both ends are not bonded.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sheet packaging body.

Some sheets, such as sanitary tissue paper, are manufactured and distributed as sheet packages in which a paper band is wrapped around the entire width of a sheet stack in which multiple sheets are stacked. When using such sheet packages, the paper band is removed and the sheet stack inside is replenished into a dispenser or the like (see, for example, Patent Document 1).

Patent No. 6113297

However, with sheet packaging wrapped in wrapping paper such as a paper band, it is necessary to tear the wrapping paper to remove the contents before refilling the dispenser, and the wrapping paper may not tear cleanly, making it time-consuming to refill the sheet.

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

The first aspect of the present invention provides a sheet packaging body having a rectangular parallelepiped sheet laminate in which a plurality of sheets are stacked, and a packaging member wrapped around the top, bottom, and a pair of opposing side surfaces of the sheet laminate, the packaging member having an overlapping portion where both longitudinal ends of the packaging member overlap when wrapped around the sheet laminate, the overlapping portion having a first adhesive portion that bonds the both ends of the packaging member and extends from one edge side in a width direction perpendicular to the longitudinal direction of the packaging member to a center side of the overlapping portion, a second adhesive portion that bonds the both ends of the packaging member and extends from the center side of the overlapping portion to the other edge side in the width direction, and a non-adhesive portion that is located between the first adhesive portion and the second adhesive portion and where the both ends are not bonded.

In this specification, a sheet stack refers to a rectangular parallelepiped-shaped stack in which multiple sheets are folded and stacked in the height direction. The rectangular parallelepiped-shaped sheet stack has a top surface, a bottom surface, a pair of long sides, and a pair of short sides. The pair of opposing sides refers to a pair of long sides or a pair of short sides.

The sheet stack is used by storing (or refilling) it in a device or means, such as a dispenser, that can dispense sheets one by one. The dispenser has a body that stores the sheet stack, a storage opening that stores the sheets, and a removal opening that removes the sheets from the stored sheet stack.

The packaging material has a predetermined width and length that is wrapped around the sheet stack. The sheet packaging material refers to the state in which the packaging material is wrapped around the sheet stack and the sheet stack is bound together. The top, bottom, and pair of side surfaces of the sheet stack are covered with the packaging material, but when the pair of side surfaces covered with the packaging material are a pair of long side surfaces, a pair of short side surfaces of the sheet stack are exposed and not covered by the packaging material. Also, when the pair of side surfaces covered with the packaging material are a pair of short side surfaces, a pair of long side surfaces of the sheet stack are exposed and not covered by the packaging material.

The longitudinal direction of the packaging member corresponds to the winding direction in which the packaging member is wound around the sheet laminate. The width direction of the packaging member is the direction along the longitudinal direction of the sheet laminate when the packaging member is wound around the sheet laminate. The central portion of the overlapping portion includes the center of the overlapping portion and indicates an area that is 5 to 20% of the total length of the overlapping portion in the width direction of the packaging member.

In the first aspect, when the packaging material is wrapped around the sheet laminate, a non-adhesive portion is provided between the first adhesive portion and the second adhesive portion in the overlapping portion where both longitudinal ends of the packaging material overlap, and the non-adhesive portion can form the opening portion of the packaging material.

As a result, in the first embodiment, the packaging member can be opened simply by inserting a finger between the outer portion of the non-adhesive portion (part of one end of the packaging member) and the inner portion (part of the other end of the packaging member) and flipping over the outer portion. The packaging member can then be easily removed from the sheet stack by tearing the opened packaging member. Therefore, in the first embodiment, it is easy to replenish sheets.

In addition, in the first aspect, the packaging material is wrapped around only the top surface, bottom surface, and a pair of opposing side surfaces of the sheet laminate (the other pair of opposing side surfaces of the sheet laminate are exposed), so the entire sheet laminate is not covered with the packaging material, which reduces the amount of packaging material used.

A second aspect of the present invention provides the sheet packaging body according to the first aspect, in which an outer portion of the non-adhesive portion is formed with a tearing score line extending from an edge of the outer portion in the longitudinal direction of the packaging member. The outer portion of the non-adhesive portion is formed from a part of one end of the packaging member.

In this specification, a tear-open cut line is a cut line such as a perforation where cuts and ties (the uncut portion between two cuts) are arranged alternately and when a tie is broken, the adjacent cuts become continuous cuts.

In the second aspect, a tearing score line extending from the edge of the outer part of the non-adhesive portion in the longitudinal direction of the packaging member is formed on the outer part of the non-adhesive portion, so that after opening the packaging member through the non-adhesive portion, the packaging member can be easily torn further along the tearing score line. Therefore, in the second aspect, it is even easier to remove the packaging member from the sheet laminate.

The third aspect of the present invention provides the sheet packaging body according to the first aspect, in which a pair of tearing score lines are formed on the outer portion of the non-adhesive portion, the tearing score lines extending from the edge of the outer portion in a divergent manner in the longitudinal direction of the packaging member.

In this specification, the edge of the outer portion corresponds to a partial edge of one end of the packaging member that constitutes the outer portion of the non-adhesive portion. "Extending in a widening manner in the longitudinal direction of the packaging member" means that a pair of tear score lines extend in the longitudinal direction of the packaging member so that the distance between the pair of tear score lines in the width direction of the packaging member becomes longer.

In the third aspect, a pair of tearing score lines formed on the outer parts of the non-adhesive portions extend fan-outward in the longitudinal direction of the packaging material from the edges of the outer parts of the non-adhesive portions, so that when the packaging material is torn along the tearing score lines, the tearing line is more likely to connect to both widthwise edges of the packaging material. This makes it possible to prevent the packaging material from being torn into multiple pieces (the torn pieces can be consolidated into one piece). This makes it easy to dispose of the packaging material removed from the sheet laminate.

The fourth aspect of the present invention provides a sheet packaging body according to the third aspect, in which the cut constituting the tearing score line has a base portion extending linearly and an extension portion extending from one end of the outer portion of the base portion on the edge side toward the tearing score line side that faces the width direction of the packaging material.

In this specification, the linear base is configured such that the base of the cut that constitutes one tearing score line and the base of the cut that constitutes the other tearing score line are arranged to extend divergently from the edge side of the outer portion in the longitudinal direction of the packaging material.

In this specification, "extending from one end of the edge side of the outer part of the base to the opposing tear score line in the width direction of the packaging material" means that the extension of the cut constituting one tear score line and the extension of the cut constituting the other tear score line extend to the inside of each pair of tear score lines. Also, each cut of the tear score line forms an L shape with the extension bending at an obtuse angle to the base that extends flared from the edge of the outer part in the longitudinal direction of the packaging material.

In the fourth aspect, because the cuts that make up the tearing score lines have such bases and extensions, even if the tearing line deviates to the inside of a pair of tearing score lines that extend divergently when the packaging material is torn along the tearing score lines, it can connect to the extension of the adjacent cut and return to the direction in which the base extends. Therefore, the packaging material can be reliably torn along the tearing score lines that extend divergently from the edge of the outer part of the non-adhesive portion in the longitudinal direction of the packaging material.

A fifth aspect of the present invention provides a sheet packaging body according to any one of the first to fourth aspects, in which the overlapping portion is arranged to face one of the pair of side surfaces of the sheet laminate.

In the fifth aspect, the overlapping portion is provided in the packaging member so as to face one of the pair of side surfaces of the sheet laminate, so that the easily torn non-adhesive portion does not face the top and bottom surfaces of the sheet laminate on which the sheet packaging body is likely to overlap.

Therefore, in the fifth aspect, it is possible to prevent unexpected opening of the non-adhesive portion that constitutes the opening portion during transportation or storage of the sheet packaging body. In addition, in the fifth aspect, since the non-adhesive portion that constitutes the opening portion is provided in a position on the sheet packaging body that is easily visible, it is easy to open the packaging member.

A sixth aspect of the present invention provides a sheet packaging body according to any one of the first to fourth aspects, in which the length of the first adhesive portion and the length of the second adhesive portion in the width direction of the packaging member are different, and the non-adhesive portion is located near one edge or the other edge in the width direction of the packaging member.

In this specification, "the length of the first adhesive portion is different from the length of the second adhesive portion" means that the length of the first adhesive portion is shorter than the length of the second adhesive portion, or that the length of the first adhesive portion is longer than the length of the second adhesive portion.

In this specification, "near one widthwise edge of the packaging member" refers to the area between one widthwise edge of the packaging member and the center of the overlapping portion. "near the other widthwise edge of the packaging member" refers to the area between the other widthwise edge of the packaging member and the center of the overlapping portion.

In the sixth aspect, the non-adhesive portion is located closer to one edge or the other edge in the width direction of the packaging member, so that the packaging member can be opened via the non-adhesive portion, and the tear line when the packaging member is torn is more likely to connect to one edge or the other edge in the width direction of the packaging member. This makes it possible to prevent the packaging member from being torn into multiple pieces. In addition, the packaging member can be easily removed from the sheet stack, and sheets can be easily replenished.

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

FIG. 2 is a perspective view of a sheet wrapping body according to the first embodiment. FIG. 2 is a right side view of the sheet wrapping body according to the first embodiment. FIG. 2 is a front view of the sheet wrapping body according to the first embodiment. FIG. 11 is a front view of a sheet wrapping body according to a second embodiment. FIG. 13 is a front view of a sheet wrapping body according to a third embodiment. FIG. 13 is a front view of a sheet wrapping body according to a fourth embodiment. FIG. 13 is an enlarged view of one of the tearing score lines of the sheet packaging body according to the fourth embodiment. FIG. 13 is an enlarged view of the other tear-open score line of the sheet packaging body according to the fourth embodiment. FIG. 13 is a front view of a sheet wrapping body according to a fifth embodiment. FIG. 13 is a perspective view of a sheet packaging body that does not form an opening portion (non-adhesive portion).

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

In addition, in this specification, deviations in the directions such as vertical, parallel, and orthogonal are permitted to a degree that does not impair the action and effect of the embodiment. Furthermore, vertical, parallel, and orthogonal may include approximately vertical, approximately parallel, and approximately orthogonal. The shape of the corners is not limited to right angles, and may be rounded in a bow shape.

In each figure, a three-dimensional Cartesian coordinate system is used in three axial directions (X direction, Y direction, and Z direction), with the left-right direction of the sheet packaging body defined as the X direction, the front-back direction defined as the Y direction, and the up-down direction defined as the Z direction.

First Embodiment
Fig. 1 is a perspective view of a sheet packaging body according to a first embodiment, Fig. 2 is a right side view of the sheet packaging body of Fig. 1, and Fig. 3 is a front view of the sheet packaging body of Fig. 1. The sheet packaging body 100 of the embodiment has a sheet laminate 10 and a packaging member 20. The sheet packaging body 100 is an example of a sheet packaging body according to the present invention, and the sheet laminate 10 and the packaging member 20 are an example of a sheet laminate and a packaging member constituting the sheet packaging body according to the present invention.

The sheet stack 10 is made up of multiple sheets P stacked together. The sheet stack 10 is a rectangular stack of multiple sheets P that are folded and stacked in the height direction (Z direction) of the sheet packaging body 100. The rectangular sheet stack 10 has a top surface 11, a bottom surface 12, a pair of long sides 13, 14, and a pair of short sides 15, 16 (Figs. 1 and 2).

The form of the sheet stack 10 is not particularly limited, and for example, one sheet (or a set of sheets) P may be folded in half, with one half of the folded sheet P sandwiched between another folded sheet P, and the sheets P stacked one on top of the other.

In such a sheet stack 10, the sheets P are alternately stacked in a folded state, so that when one sheet (or a set of sheets) P is pulled out, the next sheet (or a set of sheets) P is pulled out. This method of pulling out sheets from the sheet stack is called a pop-up system. Note that the form of the sheet P (sheet stack 10) is not limited to this pop-up system, and it may be a simple stack of multiple sheets P, or a sheet (or a set of sheets) P folded in half and then folded in half again (folded in quarters) and stacked.

The sheet stack 10 is used by being stored in a device or means, such as a dispenser, that can take out the sheets P one by one. Here, the dispenser has, for example, a main body in which the sheet stack 10 is stored, a lid that covers the main body, a storage opening for storing the sheets P, and a removal opening for removing the sheets P from the sheet stack 10 in which the sheet stack 10 is stored (not shown).

The uses of the sheet P (sheet laminate 10) are not particularly limited, and it can be used as paper towels, wiper (rag) towels, kitchen paper, tissue paper, toilet paper, etc. Furthermore, the uses of the sheet P (sheet laminate 10) are not limited to industrial or household use.

The material of the sheet P is not particularly limited, but may be, for example, a sheet of paper, nonwoven fabric, or cloth, and is preferably a paper sheet. When the sheet P is a paper sheet, base paper containing pulp as the main raw material is used. The pulp composition may be a known composition for paper sheets. For example, the pulp content may be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

The pulp composition of the sheet P (paper sheet) may be any ratio of softwood pulp such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp) to hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp). In particular, a pulp composition having a higher ratio of softwood pulp to hardwood pulp is preferred. The ratio of softwood pulp to hardwood pulp is preferably 50:50 to 80:20. The pulp contained in the pulp composition of the sheet P (paper sheet) may be recycled paper pulp.

The basis weight of the sheet P is not particularly limited, but is preferably 12 to 80 g/m ² for paper and 20 to 100 g/m ² for nonwoven fabric, depending on the number of plies. The basis weight is measured in accordance with the provisions of JIS P 8124.

The thickness of the sheet P (paper sheet) is not particularly limited, but may be, for example, the paper thickness measured under the environment of JIS P 8111 (1998). For example, the thickness of the paper sheet constituting the sheet P is preferably 50 to 500 μm per ply, and more preferably about 60 to 330 μm.

The paper sheets constituting sheet P may also be embossed. Such embossing may be done by pressing the paper sheets using a pressure embossing method, by piercing the paper sheets with pins using a pin embossing method to form irregularities or holes on one side of the paper sheets, or by heat embossing method to heat and melt a water-soluble adhesive (such as starch) to bond the stacked paper sheets.

The number of plies of the sheet P is not particularly limited, but can be one or more, and is preferably one ply (single type) or two plies (double type or two-ply). When embossing a sheet P of two or more plies (two-ply), the embossing may be applied to the paper sheet in a two-ply state, or one ply may be embossed and then made into two plies.

The dimensions of the sheet laminate 10 can be such that the length L1 in the longitudinal direction (X direction) of the sheet packaging body 100 is 150 mm or more and 350 mm or less, the width W1 in the transverse direction (Y direction) is 50 mm or more and 150 mm or less, and the height H1 in the height direction (Z direction) is 40 mm or more and 150 mm or less (Figure 2). Such a sheet laminate 10 can be manufactured, for example, by a rotary type or multi-stand type interfolder.

The packaging member 20 has a predetermined width and length that allows it to be wrapped around the sheet laminate 10. In the sheet packaging body 100, the packaging member 20 is wrapped around the top surface 11, bottom surface 12, and a pair of long sides 13, 14 of the sheet laminate 10, and ends 20A, 20B in the longitudinal direction (width direction (Y direction) of the sheet packaging body 100) of the packaging member 20 are joined. This binds the sheet laminate 10 with the packaging member 20. The joining mode of the packaging member 20 is not particularly limited, and for example, hot melt, heat seal (vinyl acetate), adhesive, pressure bonding, etc. can be used.

In this embodiment, the top surface 11, bottom surface 12, and pair of long sides 13, 14 of the sheet laminate 10 are covered with the packaging material 20, and the pair of short sides 15, 16 of the sheet laminate 10 are exposed without being covered by the packaging material 20. The top surface 21 of the packaging material 20 faces the top surface 11 of the sheet laminate 10, the bottom surface 22 faces the bottom surface 12 of the sheet laminate 10, the front surface 23 faces one of the long sides 13 of the sheet laminate 10, and the back surface 24 faces the other long side 14 of the sheet laminate 10 (Figs. 1 and 2).

In the sheet packaging body 100 of this embodiment, the top surface 11, bottom surface 12, and pair of long sides 13, 14 of the sheet laminate 10 are covered with the packaging material 20 (the pair of short sides 15, 16 of the sheet laminate 10 are exposed and not covered by the packaging material 20), but this packaging form is not limited to this. For example, the top surface 11, bottom surface 12, and pair of short sides 15, 16 of the sheet laminate 10 may be covered with the packaging material 20 (the pair of long sides 13, 14 of the sheet laminate 10 are exposed and not covered by the packaging material 20).

The material of the packaging member 20 is not particularly limited. The packaging member 20 can be made of resin, for example. Here, "made of resin" means that the material is a resin such as polyethylene. Furthermore, from the viewpoint of reducing the environmental burden, such as reducing the use of plastic and preventing marine pollution by microplastics, it is preferable that the packaging member 20 is made of paper. Here, "made of paper" means that the material is paper.

The material of the paper used for the packaging member 20 is not particularly limited, but from the viewpoint of the shape retention and storage capacity of the sheet laminate 10, for example, paper such as kraft paper or film laminated paper (kraft paper laminated with a resin film such as polyethylene) can be used.

The packaging material 20 is preferably kraft paper, and more preferably one-sided glossy kraft paper. Here, kraft paper is paper made from kraft pulp. One-sided glossy kraft paper is made by bleaching kraft paper to white, drying one side in a Yankee dryer, and then making the paper.

In one-sided glossy kraft paper, one side of the paper (one side) constitutes the glossy surface. Here, the glossy surface refers to a surface that has a glossy appearance and has low frictional resistance compared to the non-glossy surface (the surface that is not glossy). When using such one-sided glossy kraft paper for the packaging member 20, it is preferable that the packaging member 20 is wrapped so that the glossy surface faces the sheet laminate 10.

The pulp composition of the paper that constitutes the packaging member 20 is not limited, but is, for example, 0:100 to 80:20, and preferably has a low ratio of softwood pulp to hardwood pulp. In addition, recycled paper pulp may be used for the pulp contained in the packaging member 20.

The basis weight of the paper constituting the packaging member 20 is not particularly limited, and is, for example, 20 g/ ^m2 or more and 200 g/ ^m2 or less. Here, the basis weight can be measured in accordance with the provisions of JIS P 8124. In addition, the thickness of the paper constituting the packaging member 20 is not particularly limited, and is, for example, 20 μm or more and 200 μm or less. Here, the paper thickness can be measured under the environment of JIS P 8111 (1998).

The strength of the paper constituting the packaging member 20 is such that the tensile strength in the longitudinal direction is 1.5 kN/m to 10 kN/m, the tensile strength in the transverse direction is 1 kN/m to 8 kN/m, the tear strength in the longitudinal direction is 100 mN to 1500 mN, and the tear strength in the transverse direction is 120 mN to 2100 mN. Here, the longitudinal direction refers to the MD direction of the paper, and the transverse direction refers to the CD direction of the paper. The strength of the paper can be measured under the environment of JIS P 8113 (2006).

In addition to the above-mentioned kraft paper and film-laminated paper, the paper forming the packaging member 20 may be paper made from hemp, non-wood pulp (bagasse, kenaf, etc.), biodegradable materials (biodegradable plastics, biodegradable paper, etc.), and biomass materials (renewable organic resources derived from living organisms, such as biomass film, excluding fossil resources).

The manner in which the wrapping paper 20 is wrapped around the sheet stack is not limited. For example, multiple sheet wrapping bodies can be manufactured by wrapping the wrapping paper 20 around individual sheet stacks. From the viewpoint of reducing manufacturing costs, a roll of wrapping paper may be wrapped around a bundle (a collection of sheets in which rolls of wrapping paper are alternately folded and stacked in an interfolder), and then the bundle may be cut at predetermined intervals in the longitudinal direction to manufacture multiple sheet wrapping bodies.

In addition, in a sheet packaging body obtained by wrapping a roll of wrapping paper around a bundle and cutting the bundle at a predetermined interval in the longitudinal direction, the wrapping paper 20 is wrapped around the sheet stack 10 so that the MD direction of the wrapping paper 20 is the CD direction of the sheet P. In addition, when wrapping paper 20 is wrapped around a sheet stack in which one sheet (or a set of sheets) P is folded in four and multiple sheets are stacked, the MD direction of the wrapping paper 20 is the CD direction of the sheet P. Here, the MD direction refers to the flow direction of the fibers that make up the wrapping paper or sheet. In addition, the CD direction refers to the direction perpendicular to the MD direction.

In the sheet packaging body 100 of this embodiment, the packaging member 20 has an overlapping portion 30 where both ends 20A, 20B in the longitudinal direction (Y direction and Z direction) of the packaging member 20 overlap when wrapped around the sheet laminate 10. The longitudinal direction (Y direction and Z direction) of the packaging member 20 corresponds to the winding direction (Y direction and Z direction) in which the packaging member 20 is wrapped around the sheet laminate 10 (FIGS. 1 to 3).

The overlapping portion 30 has a first adhesive portion 31, a second adhesive portion 32, and a non-adhesive portion 33.

The first adhesive portion 31 extends from one edge 20C of the packaging member 20 in the width direction (X direction) perpendicular to the longitudinal directions (Y direction and Z direction) to the center EC of the overlapping portion 30, and bonds both ends 20A, 20B of the packaging member 20.

Here, the central portion EC of the overlapping portion 30 includes the center of the overlapping portion 30 and indicates an area that is 5 to 20%, preferably 6 to 15%, and more preferably 7 to 10% of the overall length of the overlapping portion 30 in the width direction (X direction) of the packaging member 20.

The second adhesive portion 32 extends from the center EC side of the overlapping portion 30 to the other edge 20D side in the width direction (X direction) and bonds both ends 20A, 20B of the packaging member 20.

The non-adhesive portion 33 constitutes a portion where both ends 20A, 20B of the packaging member 20 are not adhered, and is located between the first adhesive portion 31 and the second adhesive portion 32. In this embodiment, the length of the first adhesive portion 31 and the length of the second adhesive portion 32 in the width direction of the packaging member 20 are approximately the same, and the non-adhesive portion 33 constitutes the center portion EC of the overlapping portion 30.

The overlapping portion 30 is preferably arranged to face one of the pair of long sides 13, 14 of the sheet laminate 10 (Fig. 1). In the sheet packaging body 100 of this embodiment, the overlapping portion 30 is provided on the front surface 23 of the packaging member 20 that faces the long side surface 13 of the sheet laminate 10.

In the sheet packaging body 100 of the first embodiment, as described above, when the packaging member 20 is wrapped around the sheet laminate 10, a non-adhesive portion 33 is provided between the first adhesive portion 31 and the second adhesive portion 32 in the overlapping portion 30 where both ends 20A, 20B of the packaging member 20 in the longitudinal direction (Y direction and Z direction) overlap, and this non-adhesive portion 33 can form the opening portion OP of the packaging member 20 (Figures 1 and 3).

As a result, in this embodiment, the packaging member 20 can be opened simply by inserting a finger between the outer portion 33A (part of one end 20A of the packaging member 20) and the inner portion 33B (part of the other end 20B of the packaging member 20) of the non-adhesive portion 33 and flipping over this outer portion 33A. Then, by tearing the opened packaging member 20, the packaging member 20 can be easily removed from the sheet stack 10. Therefore, in this embodiment, it is easy to replenish the sheets P.

In addition, in this embodiment, the packaging material 20 is wrapped around only the top surface 11, bottom surface 12, and a pair of long sides 13, 14 of the sheet laminate 10 (a pair of short sides 15, 16 of the sheet laminate 10 are exposed), so the entire sheet laminate 10 is not covered with the packaging material 20, which reduces the amount of packaging material 20 used.

In addition, in the sheet packaging body 100 of the first embodiment, as described above, the overlapping portion 30 is provided in the packaging member 20 so as to face one of the pair of long sides 13, 14 of the sheet laminate 10 (long side 13 in this embodiment), so that the easily torn non-adhesive portion 33 does not face the top surface 11 and bottom surface 12 of the sheet laminate 10 (top surface 21 and bottom surface 22 of the packaging member 20) that are likely to overlap when the sheet packaging body 100 is transported or stored.

Therefore, in this embodiment, it is possible to prevent the unintentional opening of the non-adhesive portion 33 that constitutes the opening portion OP during transportation or storage of the sheet packaging body 100. In addition, in this embodiment, the non-adhesive portion 33 that constitutes the opening portion OP is provided in an easily visible position on the sheet packaging body 100, making it easy to open the packaging member.

Second Embodiment
Fig. 4 is a front view of a sheet wrapping body according to the second embodiment. In Fig. 4, parts common to the first embodiment (Fig. 3) are denoted by the same or corresponding reference numerals as in Fig. 3, and description thereof will be omitted.

In the second embodiment of the sheet packaging body 100, a tearing score line 40 is formed in the outer portion 33A of the non-adhesive portion 33, extending from the edge AE of the outer portion 33A in the longitudinal direction (Y direction and Z direction) of the packaging member 20. Here, the edge AE of the outer portion 33A corresponds to a part of the edge of one end 20A of the packaging member 20 that constitutes the outer portion 33A of the non-adhesive portion 33.

The tearing cut line 40 is a cut line (e.g., perforation M) where cuts C and ties T (the uncut portion between two cuts C) are arranged alternately, and when a tie T breaks, the adjacent cuts C and C become a continuous cut.

In order to prevent the tearing score line 40 from tearing unexpectedly while making it easy to tear the tearing score line 40, the cut rate of the tearing score line 40 (the ratio of cut C to tie T) is preferably 60 to 90%, more preferably 65 to 88%, and even more preferably 70 to 86%.

In the second embodiment, the tearing score line 40 is composed of a pair of tearing score lines 41, 42. The pair of tearing score lines 41, 42 are arranged at a distance substantially equal to the length of the central portion EC of the overlapping portion 30 in the width direction (X direction) of the packaging member 20, and extend in a direction perpendicular to the width direction (X direction) of the packaging member 20.

In this embodiment, the tearing score line 40 (a pair of tearing score lines 41, 42) is formed only on the front surface 23 of the packaging member 20, but this is not limited thereto, and the tearing score line may be formed continuously from the front surface 23 to the top surface 21 of the packaging member 20.

In the sheet packaging body 100 of the second embodiment, the tearing score line 40 that extends from the edge AE of the outer portion 33A of the non-adhesive portion 33 in the longitudinal direction (Y direction and Z direction) of the packaging member 20 is formed in the outer portion 33A of the non-adhesive portion 33, so that after opening the packaging member 20 through the non-adhesive portion 33, the packaging member 20 can be easily torn along the tearing score line 40. Therefore, in this embodiment, it is even easier to remove the packaging member 20 from the sheet laminate 10.

Third Embodiment
Fig. 5 is a front view of a sheet wrapping body according to a third embodiment. In Fig. 5, parts common to the first embodiment (Fig. 3) and the second embodiment (Fig. 4) are denoted by the same or corresponding reference numerals as in Figs. 3 and 4, and description thereof will be omitted.

In the third embodiment of the sheet packaging body 100, the outer portion 33A of the non-adhesive portion 33 is formed with a tearing score line 40 (a pair of tearing score lines 41, 42) that extends divergently from the end edge AE of the outer portion 33A in the longitudinal direction (Y direction and Z direction) of the packaging member 20.

The pair of tearing score lines 41, 42 extend in the longitudinal direction (Y direction and Z direction) of the packaging member 20 so that the distance between the pair of tearing score lines 41, 42 in the width direction (X direction) of the packaging member 20 is long. In this embodiment, the pair of tearing score lines 41, 42 are formed on the front surface 23 of the packaging member 20 and extend in a fan-like manner from the bottom surface 22 side to the top surface 21 side of the packaging member 20.

In the third embodiment of the sheet packaging body 100, a pair of tearing score lines 40 (tearing score lines 41, 42) formed in the outer portion 33A of the non-adhesive portion 33 thus extend fan-outward from the edge AE of the outer portion 33A of the non-adhesive portion 33 in the longitudinal direction (Y direction and Z direction) of the packaging member 20, so that when the packaging member 20 is torn along the tearing score lines 40 (tearing score lines 41, 42), the tearing line (not shown) is more likely to connect to both end edges 20C, 20D of the packaging member 20 in the width direction (X direction).

This prevents the packaging member 20 from being torn into multiple pieces (not shown) after it is torn (it keeps the torn pieces together). Therefore, in the sheet packaging body 100 of the third embodiment, it is easy to dispose of the packaging member 20 removed from the sheet laminate 10.

Fourth Embodiment
Fig. 6 is a front view of a sheet packaging body according to the fourth embodiment. In Fig. 6, parts common to the first embodiment (Fig. 3), the second embodiment (Fig. 4), and the third embodiment (Fig. 5) are denoted by the same or corresponding reference numerals as in Figs. 3 to 5, and description thereof will be omitted.

In the fourth embodiment of the sheet packaging body 100, the cut 50 constituting one of the tearing score lines 40 (perforation M) has a linear base 51 and an extension 52, and the cut 60 constituting the other tearing score line 42 has a linear base 61 and an extension 62 (Figure 6).

The linear bases 51, 61 are configured such that the base 51 of the cut constituting one tearing score line 41 and the base 61 of the cut constituting the other tearing score line 42 are arranged to extend fan-out from the edge AE side of the outer portion 33A in the longitudinal direction (Y direction and Z direction) of the packaging member 20 (Figure 6).

The extension 52 extends from one end of the edge AE side of the outer portion 33A of the base 51 to the tearing score line 42 (extension 62) side facing the width direction (X direction) of the packaging material 20 (Figs. 6 and 7). The extension 62 also extends from one end of the edge AE side of the outer portion 33A of the base 61 to the tearing score line 41 (extension 52) side facing the width direction (X direction) of the packaging material 20 (Figs. 6 and 8).

The extension 52 of the cut 50 constituting one of the tearing score lines 41 and the extension 62 of the cut 60 constituting the other tearing score line 42 extend inside each other of the pair of tearing score lines 40 (the pair of tearing score lines 41, 42).

In this way, the cut 50 of the tearing score line 41 is L-shaped with the extension 52 bent at an obtuse angle to the base 51 that extends flaringly from the edge AE of the outer portion 33A in the longitudinal direction of the packaging material 20 (Y direction and Z direction) (Figs. 6 and 7). Also, the cut 60 of the tearing score line 42 is L-shaped with the extension 62 bent at an obtuse angle to the base 61 that extends flaringly from the edge AE of the outer portion 33A in the longitudinal direction of the packaging material 20 (Y direction and Z direction) (Figs. 6 and 8).

In the fourth embodiment of the sheet packaging body 100, the cuts 50, 60 constituting the tearing score line 40 (a pair of tearing score lines 41, 42) have such bases 51, 61 and extensions 52, 62. Therefore, even if the tearing line (not shown) deviates to the inside of the pair of tearing score lines 41, 42 that extend divergently when the packaging material 20 is torn along the tearing score line 40, it can connect to the extensions 52, 62 of the adjacent cuts 50, 60 and return to the direction in which the bases 51, 61 extend (the direction in which the tearing score lines 41, 42 extend). Therefore, the packaging material 20 can be reliably torn along the tearing score lines 41, 42 that extend divergently from the edge AE of the outer portion 33A of the non-adhesive portion 33 in the longitudinal direction (Y direction and Z direction) of the packaging material 20.

Fifth Embodiment
Fig. 9 is a front view of a sheet packaging body according to the fifth embodiment. In Fig. 9, parts common to the first embodiment (Fig. 3), the second embodiment (Fig. 4), the third embodiment (Fig. 5), and the fourth embodiment (Fig. 6) are denoted by the same or corresponding reference numerals as in Figs. 3 to 6, and description thereof will be omitted.

In the sheet packaging body 100 of the fifth embodiment, the length of the first adhesive portion 31 and the length of the second adhesive portion 32 in the width direction (X direction) of the packaging member 20 are different, and the non-adhesive portion 33 is located near one edge 20C or the other edge 20D in the width direction (X direction) of the packaging member 20. In the example of the fifth embodiment shown in FIG. 9, the non-adhesive portion 33 is located near one edge 20C in the width direction (X direction) of the packaging member 20, and the tearing score line 40 of the fourth embodiment (cuts 50, 60 have linear bases 51, 61 and extensions 52, 62) is provided.

When the length of the first adhesive portion 31 and the length of the second adhesive portion 32 are different, the length of the first adhesive portion 31 may be shorter than the length of the second adhesive portion 32, or the length of the first adhesive portion 31 may be longer than the length of the second adhesive portion 32. In this embodiment, the length of the first adhesive portion 31 is shorter than the length of the second adhesive portion 32 (Figure 9).

The area near one edge 20C in the width direction (X direction) of the packaging member 20 indicates the area NE between one edge 20C in the width direction (X direction) of the packaging member 20 and the center EC of the overlapping portion 30 (FIG. 6). The area near the other edge 20D in the width direction (X direction) of the packaging member 20 indicates the area between the other edge 20D in the width direction (X direction) of the packaging member 20 and the center EC of the overlapping portion 30 (not shown). In this embodiment, a non-adhesive portion 33 is provided near one edge 20C in the width direction (X direction) of the packaging member 20 (area NE).

In the fifth embodiment of the sheet packaging body 100, the non-adhesive portion 33 is positioned closer to one edge 20C or the other edge 20D in the width direction (X direction) of the packaging member 20, so that the packaging member 20 can be opened via the non-adhesive portion 33, and the tear line (not shown) generated when the packaging member 20 is torn can easily connect to one edge 20C or the other edge 20D in the width direction (X direction) of the packaging member 20. This makes it possible to prevent the number of torn pieces (not shown) from increasing after the packaging member 20 is torn. In addition, the packaging member 20 can be easily removed from the sheet stack 10, and the sheet P can be easily replenished.

The present invention will now be described in more detail with reference to examples. The evaluations of the examples and comparative examples were carried out under the following conditions. The conditions of the sheet packaging and the evaluation results are shown in Tables 1 and 2.

[Sheet packaging (sample)]
A sheet packaging body 100 was prepared by wrapping and packaging a top surface 11, a bottom surface 12, and a pair of long sides 13, 14 of a paper towel (manufactured by Daio Paper Co., Ltd., Elleair PAPER TOWEL Smart Type Single, 200 sheets, sheet dimensions: length 170 mm, width 210 mm) with packaging member 20 (width 210 mm) as a sheet stack 10 in which sheets P are alternately folded and stacked so as to be pulled out one by one in a pop-up manner. The packaging member 20 had an overlapping portion 30, where both ends 20A, 20B of the packaging member 20 in the longitudinal direction (Y direction and Z direction) overlap when wrapped around the sheet stack 10, on a front surface 23 of the packaging member 20 facing the long side surface 13 of the sheet stack 10.

[Openability]
The sheet packaging body 100 (sample) was evaluated for ease of opening when it was opened from the overlapping portion 30 of the packaging member 20. The ease of opening was evaluated on a 6-point scale, with the most difficult to open being rated as "0" and the easiest to open being rated as "6." Note that an evaluation of 1 or more was judged as good, and an evaluation of 0 was judged as poor.

[Example 1]
The material of the packaging member 20 was paper (craft paper with a basis weight of 40 g/ ^m2 ) (paper packaging), and an opening portion OP (non-adhesive portion 33) was provided in the center (center portion EC) of the overlapping portion 30 (see Figures 1 to 3). The conditions and evaluation results of Example 1 are shown in Table 1.

[Example 2]
In the outer portion 33A of the non-adhesive portion 33, the tearing score line 40 extending from the edge AE of the outer portion 33A in a direction perpendicular to the width direction (X direction) of the packaging member 20 was formed by straight perforations M (a pair of tearing score lines 41, 42) spaced at approximately the same interval as the length of the center portion EC of the overlapping portion 30 in the width direction (X direction) of the packaging member 20, and the cut rate of the tearing score line 40 (perforation M) was 75.0% (cut length 3 mm, tie length 1 mm) (see FIG. 4). The conditions and evaluation results of Example 2 are shown in Table 1.

[Example 3]
The same procedure as in Example 2 was followed (see FIG. 5 ), except that the tearing score line 40 was formed as a pair of perforations M (a pair of tearing score lines 41, 42) extending divergently from the edge AE of the outer portion 33A in the longitudinal direction (Y direction and Z direction) of the packaging member 20. The conditions and evaluation results of Example 3 are shown in Table 1.

[Example 4]
The tearing score line 40 was formed with an L-shaped perforation M (a pair of tearing score lines 41, 42 in which the cuts 50, 60 have linear bases 51, 61 and extensions 52, 62) and the cut rate of the tearing score line 40 (perforation M) was 85.7% (cut length 6 mm, tie length 1 mm) (see Figures 6 to 8). The conditions and evaluation results of Example 4 are shown in Table 1.

[Example 5]
The same procedure was followed as in Example 4, except that the opening portion OP (non-adhesive portion 33) was provided near one end edge 20C (end) in the width direction (X direction) of the packaging member 20 (see FIG. 9). The conditions and evaluation results of Example 5 are shown in Table 1.

[Comparative Example 1]
The comparative example 1 was carried out in the same manner as in Example 1, except that the opening portion OP (non-adhesive portion 33) was not formed (see FIG. 10). The conditions and evaluation results of the comparative example 1 are shown in Table 1.

[Example 6]
The same procedure was followed as in Example 1, except that the material of the packaging member 20 was paper (craft paper with a basis weight of 30 g/ ^m2 ) with a 15 μm thick polyethylene (PE) layer (paper + PE packaging) (see FIGS. 1 to 3). The conditions and evaluation results of Example 6 are shown in Table 2.

[Example 7]
The conditions and evaluation results of Example 7 are shown in Table 2. Example 7 was carried out in the same manner as Example 2, except that the material of the packaging member 20 was paper + PE packaging (see FIG. 4).
[Example 8]
The conditions and evaluation results of Example 8 are shown in Table 2. Example 8 was conducted in the same manner as Example 3, except that the material of the packaging member 20 was paper + PE packaging (see FIG. 5).

[Example 9]
The conditions and evaluation results of Example 9 are shown in Table 2. Example 9 was conducted in the same manner as in Example 4, except that the material of the packaging member 20 was paper + PE packaging (see Figs. 6 to 8).

[Example 10]
The conditions and evaluation results of Example 10 are shown in Table 2. Example 10 was carried out in the same manner as Example 5, except that the material of the packaging member 20 was paper + PE packaging (see FIG. 9).

[Comparative Example 2]
The comparative example was the same as the comparative example 1 except that the material of the packaging member 20 was paper + PE packaging (see FIG. 10). The conditions and evaluation results of the comparative example 2 are shown in Table 2.

As can be seen from Tables 1 and 2, when the packaging member 20 is wrapped around the sheet laminate 10, the sheet packaging body 100 (sample) in which the overlapping portion 30 where both ends 20A, 20B in the longitudinal direction (Y direction and Z direction) of the packaging member 20 overlap is provided with a non-adhesive portion 33 located between the first adhesive portion 31 and the second adhesive portion 32 has good openability (Examples 1 to 10).

In addition, the sheet packaging body 100 in which the packaging member 20 was provided with a tearing score line 40 had improved openability (Examples 2 to 5, 7 to 10).

Furthermore, the sheet packaging body 100 in which the tearing score lines 40 extend divergently from the edge AE of the outer portion 33A in the longitudinal direction (Y direction and Z direction) of the packaging member 20 has further improved openability (Examples 3 to 5, 8 to 10).

Furthermore, the cuts 50, 60 of the tearing score line 40 (tearing score lines 41, 42) are L-shaped with the bases 51, 61 extending divergently from the edge AE of the outer portion 33A in the longitudinal direction (Y direction and Z direction) of the packaging member 20, and the extensions 52, 62 bend at an obtuse angle, resulting in a sheet packaging body 100 with improved openability (Examples 4-5, 9-10).

On the other hand, sheet packages in which the overlapping portion 30 where both ends 20A, 20B of the packaging member 20 in the longitudinal direction (Y direction and Z direction) overlap did not have a non-adhesive portion 33 were poorly opened (Comparative Examples 1 and 2).

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 P Sheet 11 Top surface 12 Bottom surface 13 Long side surface 14 Long side surface 15 Short side surface 16 Short side surface 20 Packaging member 20A End portion 20B End portion 21 Top surface 22 Bottom surface 23 Front surface 24 Back surface 30 Overlapped portion 31 First adhesive portion 32 Second adhesive portion 33 Non-adhesive portion OP Opening portion 33A Outer portion AE Edge NE Region 33B Inner portion 40, 41, 42 Cut line for tearing M Perforation C Cut T Tie 50 Cut 51 Base portion 52 Extension portion 60 Cut 61 Base portion 62 Extension portion

Claims (6)

a rectangular parallelepiped sheet laminate in which a plurality of sheets are laminated;
a packaging material wrapped around the top surface, the bottom surface, and a pair of opposing side surfaces of the sheet laminate;
the packaging material has an overlapping portion where both ends of the packaging material in the longitudinal direction overlap each other when the packaging material is wrapped around the sheet stack,
The overlapping portion is
a first adhesive portion that bonds the both end portions of the packaging member and extends from one end edge side in a width direction perpendicular to the longitudinal direction of the packaging member toward a center portion side of the overlapping portion;
a second adhesive portion that adheres the both end portions of the packaging member to each other and extends from the center side of the overlapping portion to the other end edge side in the width direction;
a non-adhesive portion located between the first adhesive portion and the second adhesive portion, and the both ends are not adhered to each other;
Sheet packaging. A tearing score line is formed on an outer portion of the non-adhesive portion, the tearing score line extending from an edge of the outer portion in the longitudinal direction of the packaging member.
The sheet packaging body according to claim 1 . A pair of tearing score lines are formed on an outer portion of the non-adhesive portion, the tearing score lines extending from an edge of the outer portion in a divergent manner in the longitudinal direction of the packaging material.
The sheet packaging body according to claim 1 . The cut constituting the cleavage score line is
A linearly extending base;
an extension portion extending from one end of the outer portion of the base toward the tearing score line facing the width direction of the packaging material,
The sheet packaging body according to claim 3. The overlapping portion is arranged to face one of the pair of side surfaces of the sheet laminate.
The sheet packaging body according to any one of claims 1 to 4. a length of the first adhesive portion and a length of the second adhesive portion are different in a width direction of the packaging member,
the non-adhesive portion is located near the one edge or the other edge in the width direction of the packaging member;
The sheet packaging body according to any one of claims 1 to 4.

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