WO2023233890A1

WO2023233890A1 - Package for roll-form thin sanitary paper

Info

Publication number: WO2023233890A1
Application number: PCT/JP2023/016763
Authority: WO
Inventors: 翔平吉田
Original assignee: 大王製紙株式会社
Priority date: 2022-05-31
Filing date: 2023-04-27
Publication date: 2023-12-07
Also published as: JP2023176285A; TW202400487A

Abstract

A package for a roll-form thin sanitary paper, the package including a paper base material for packaging a plurality of roll-form thin sanitary papers, wherein the surface of the paper base material that comes in contact with the plurality of roll-form thin sanitary papers is coated with a heat-sealing agent, excluding a region on said surface where peripheral surfaces of the roll-form thin sanitary papers come in contact with the paper base material.

Description

Packaging for rolled sanitary tissue paper

The present invention relates to a package for rolled sanitary tissue paper.

Packaging bags for roll-shaped tissue paper containing roll-shaped sanitary tissue paper such as kitchen paper, paper towels, toilet paper, tissue paper, etc. are distributed and used with multiple rolls stored in a resin film packaging bag. be done. In recent years, from the perspective of reducing environmental burdens such as global warming caused by _CO2 emissions and marine pollution caused by microplastics, we have changed the packaging bags used for rolled sanitary tissue paper bags from resin to paper. There is an active movement to reduce the amount of resin used in packaging bags.

Patent Document 1 describes a toilet roll packaging body including a heat seal layer on a paper base material, in which the heat seal layer is formed on the entire surface of the paper base material, and the heat seal layer is formed only on the parts where the paper base materials are laminated and joined. A configuration for forming layers is disclosed.

JP2021-172415A

When a heat-sealing layer is formed on the entire surface of a base material containing paper (paper base material), if the product to be packaged is a roll of sanitary tissue paper, the peripheral surface of the roll of sanitary tissue paper is coated with the heat seal layer of the paper base material. In contact with the layer. Therefore, the sealant of the heat-sealing layer may adhere to or adhere to the roll of sanitary tissue paper, which may impair the quality and appearance of the roll of sanitary tissue paper.

On the other hand, if the heat-seal layer is used only for the parts where the paper base materials are laminated and bonded together, the area where the heat-seal layer is formed may have a complicated shape or be mottled, especially if the packaging is a caramel method. Patterns or enclaves may occur. For this reason, the sealability of the package cannot be ensured, and there is a high possibility that the process of applying the heat sealing agent and the handling after forming the heat seal layer will be complicated.

An object of the present invention is to provide a packaging body for rolled sanitary tissue paper that can ensure sufficient sealing performance without impairing the quality or appearance of the rolled sanitary tissue paper even when the rolled sanitary tissue paper is packaged using a paper base material. It is to provide.

A packaging body for rolled sanitary tissue paper according to one aspect of the present invention is a packaging body including a paper base material for packaging a plurality of roll-shaped sanitary tissue papers, the packaging body including a paper base material for packaging a plurality of roll-shaped sanitary tissue paper rolls of the paper base material. A heat sealing agent is coated on the surface that contacts the sanitary tissue paper, except for the area where the circumferential surface of each roll of sanitary tissue paper contacts the paper base material.

According to one aspect of the disclosed invention, there is provided a roll of sanitary tissue paper that can ensure sufficient sealing performance without impairing the quality or appearance of the roll of sanitary tissue paper even when the roll of sanitary tissue paper is packaged using a paper base material. It is possible to provide a package for

It is a figure which shows the package body in which the roll-shaped sanitary tissue paper was accommodated in the packaging bag. It is a figure which shows the roll-shaped sanitary tissue paper accommodated in the packaging bag. FIG. 2 is a view of the package shown in FIG. 1 viewed from the top side. FIG. 2 is a view of the package shown in FIG. 1 viewed from the bottom side. FIG. 2 is a view of the package of FIG. 1 viewed from one side. FIG. 2 is a view of the package shown in FIG. 1 viewed from the other side. FIG. 2 is a view of the package shown in FIG. 1 viewed from one end side. FIG. 2 is a view of the package shown in FIG. 1 viewed from the other end side. It is a developed view of a packaging bag. FIG. 9 is a sectional view taken along line AA in FIG. 9; FIG. 9 is a sectional view taken along line BB in FIG. 9;

<Package>
Embodiments of the present invention will be described in detail with reference to the drawings. In each figure, common parts may be given the same reference numerals and explanations may be omitted. Furthermore, in each figure, the scale of each member may differ from the actual scale. In each figure, a three-dimensional orthogonal coordinate system with three axes (X direction, Y direction, Z direction) is used. The length direction of the packaging bag is the X direction, the width direction is the Y direction, and the height direction ( (vertical direction or thickness direction) is defined as the Z direction.

FIG. 1 is a diagram showing a packaging body in which a roll is accommodated in a packaging bag according to an embodiment. FIG. 2 is a diagram showing a roll accommodated in a packaging bag. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7, and FIG. 8 show the package of FIG. These are views seen from the gable side. The package 100 is an example of a package for rolled sanitary tissue paper according to the present embodiment, and includes a packaging bag 10 and a roll 20.

The roll 20 is an example of a roll of sanitary tissue paper that is housed in a packaging bag. In the example shown in FIG. 1, two rolls 20 are accommodated in the packaging bag 10. As shown in FIG. 2, the roll 20 is constructed by winding a long sheet 21 around a hollow core 22.

The form of the roll 20 is not particularly limited, and can be applied to sanitary tissue paper such as kitchen paper, paper towel, toilet paper, tissue paper, etc., for example. The use of the roll 20 is not particularly limited, and can be applied to any of industrial, home, and portable uses. Note that, among these, household kitchen paper is preferably used as the roll 20 in this embodiment.

The packaging form of the packaging bag 10 is not particularly limited, and for example, a base material 10A of the packaging bag 10 described below is processed into a cylindrical shape, and the open end of the cylindrical base material 10A is sealed. (pillow packaging), a cylindrical packaging bag 10 sheet whose both ends are folded and sealed (caramel packaging), or a combination of these can be used. In addition, in the case of pillow packaging, the cylindrical base material 10A may be folded into a gusset shape.

In the package 100 of this embodiment, the packaging form is a caramel method (hereinafter sometimes referred to as "caramel packaging"). Specifically, the seal portions 30 and 40 (side seals) on the

end surfaces

15 and 16 of the packaging bag 10 are sealed in a folded state, and the seal portion 50 (bottom seal) on the bottom surface 12 of the packaging bag 10 is sealed. In this state, the two rolls 20 are caramel wrapped in the packaging bag 10 (FIGS. 1 to 8).

As shown in FIGS. 1 and 2, the circumferential surface 21A of the roll 20 faces the top surface 11, bottom surface 12, side surface 13, and side surface 14 of the packaging bag 10, respectively, and a part of the circumferential surface 21A faces the adjacent roll 20. contacts a part of the peripheral surface 21A. Note that in FIGS. 1 and 2, L1, W1, and H1 indicate the width, length, and height of the package 100, respectively. Moreover, in FIG. 2, L2 and W2 indicate the width (roll width) and diameter dimension (roll diameter) of the roll 20, respectively.

The roll 20 has two end faces. One end surface is the upper surface 21B, and the other end surface is the lower surface 21C. Note that the upper surface and the lower surface are in a relative relationship, and the upper and lower surfaces are not fixed. In the example shown in FIGS. 1 and 2, the upper surface 21B of the roll 20 faces the end surface 15 of the packaging bag 10, and the lower surface 21C of the roll 20 faces the end surface 16 of the packaging bag 10.

In addition, when two or more rolls 20 are overlapped (lined up in series) and packaged, the roll located in the uppermost stage (uppermost roll) is stored on the end face 15 side of the packaging bag 10, and the uppermost roll is The upper surface 21B faces the end surface 15 of the packaging bag 10. Further, the roll located at the lowest stage (lowest roll) is accommodated on the end surface 16 side of the packaging bag 10, and the lower surface 21C of the lowest roll faces the end surface 16 of the packaging bag 10.

The roll 20 has a corner 23B on the upper surface 21B side and a corner 23C on the lower surface 21C side. The corner portion 23B is a ridgeline portion formed by the peripheral surface 21A and the upper surface 21B of the roll 20. The corner portion 23C is a ridgeline portion formed by the peripheral surface 21A and the lower surface 21C.

As shown in FIG. 1, when packaging with the packaging bag 10, the packaging bag 10 deforms and comes into close contact with the

corners

23B, 23C along the ridge lines of the

corners

23B, 23C. Therefore, when a plurality of rolls 20 are packaged in the packaging bag 10, the

corners

23B and 23C are likely to receive strong pressure from the packaging bag. Particularly, as shown in FIG. 1, when the packaging is a caramel type (hereinafter sometimes referred to as "caramel packaging"), the

corners

23B and 23C are subjected to strong pressure from the packaging bag.

The dimensions of the roll 20 are not particularly limited, but the width dimension (roll width) L2 of the long sheet 21 in the width direction (Y direction) is preferably 85 mm or more and 500 mm or less; or Z direction) diameter dimension (roll diameter) W2 is preferably 80 mm or more and 200 mm or less (see FIG. 2).

The number of plies of the elongated sheet 21 is not particularly limited, but it can be one or more, and preferably one or two plies (two sheets stacked).

The material of the long sheet 21 is not particularly limited, but for example, a sheet of paper, nonwoven fabric, cloth, etc. can be used, and paper (paper sheet) is preferable. In addition, when the long sheet 21 is a paper sheet, a base paper whose main raw material is pulp is used. As the pulp composition, a known composition for paper sheets can be used. For example, the blending ratio of pulp can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

Further, the pulp composition in the long sheet 21 (paper sheet) is not particularly limited. For example, softwood pulp such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp) and hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp) can be used in any ratio. I can do it. Note that the ratio of hardwood pulp to softwood pulp is not limited, but is preferably 10:90 to 80:20, and more preferably a pulp composition in which the ratio of softwood pulp to hardwood pulp is higher. Furthermore, waste paper pulp may be used as the pulp contained in the long sheet 21 (paper sheet).

The basis weight of the long sheet 21 is not particularly limited, but depending on the number of plies, in the case of paper, it is 5 g/m ² or more and 80 g/m ² or less, preferably 10 g/m ² or more and 60 g/m ² or less, More preferably, it is 10 g/m ² or more and 45 g/m ² or less. Furthermore, in the case of non-woven fabric, it is desirable that it is 20 g/m ² or more and 100 g/m ² or less. Note that the basis weight is measured in accordance with the regulations of JIS P 8124 (2011).

Further, the thickness of the long sheet 21 (paper sheet) is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be adopted. For example, when the long sheet 21 is paper, the paper thickness is 50 μm or more and 600 μm or less, preferably 60 μm or more and 500 μm or less, and more preferably 130 μm or more and 400 μm or less per 2 plies.

Furthermore, the elongated sheet 21 (paper sheet) may be embossed. Such embossing can be performed by a known embossing method.

Further, the hollow core 22 is a cylindrical core around which the elongated sheet 21 is wound in the circumferential direction (R direction) (see FIG. 2). The hollow core 22 also includes a structure in which no winding core exists (coreless structure). The material of the hollow core 22 is not particularly limited, and paper, resin, etc. can be used.

The form of the hollow core 22 is not particularly limited. For example, if the hollow core 22 is a paper tube, it may be made of one layer of cardboard or one of multiple layers of cardboard, and it can be printed on or erased from cardboard. Coated cardboard base paper coated with an odor agent in advance may also be used. Further, the manner in which the paper tube is wound is not particularly limited, and may be, for example, flat-wound, spiral-wound (so-called spiral paper tube), or the like.

The dimensions of the hollow core are not particularly limited. For example, the length of the hollow core 22 in the longitudinal direction (Y direction) is approximately the same as the width of the roll 20 in the width direction (Y direction) (85 mm or more and 500 mm or less). Further, the diameter dimension of the hollow core 22 in the radial direction (X direction or Z direction) is 33 mm or more and 50 mm or less, preferably 35 mm or more and 45 mm or less (see FIG. 2).

<Packaging bag>
FIG. 9 is a developed view of the packaging bag 10 viewed from the side that contacts the roll. 10 is a sectional view taken along line AA in FIG. 9, and FIG. 11 is a sectional view taken along line BB in FIG.

The packaging bag 10 has a base material 10A containing a paper component, and heat seal layers 30, 40, and 50 coated with a heat sealing agent on one side of the base material 10A (FIGS. 9 to 11). . Here, the base material 10A is an example of a paper base material that constitutes the package for rolled sanitary thin paper according to the present embodiment.

The heat seal layer 30 corresponds to the seal portion 30 (side seal) on the end surface 15 of the packaging bag 10. The heat seal layer 40 corresponds to the seal portion 40 (side seal) on the end surface 16 of the packaging bag 10 (FIGS. 7 and 11). The heat seal layer 50 corresponds to the seal portion 30 (bottom seal) on the bottom surface 12 of the packaging bag 10 (FIGS. 8 and 11).

Furthermore, in the packaging bag 10, the ratio of the paper component in the packaging bag 10 is 45% or more, preferably 50% or more, and more preferably 70% or more.

Here, the paper component is, for example, something made of stuck vegetable fibers (pulp). The pulp composition in the paper component is not limited, and for example, the ratio of hardwood pulp to softwood pulp is 0:100 to 70:30, preferably a pulp composition in which the ratio of softwood pulp to hardwood pulp is higher. Furthermore, waste paper pulp may be used as the pulp.

The type of paper used for the base material 10A of the packaging bag 10 is not particularly limited, but for example, packaging paper can be used. Wrapping paper is further classified as unbleached wrapping paper or bleached wrapping paper.

Examples of unbleached wrapping paper include double-sided kraft paper for heavy bags, general double-sided kraft paper, special double-sided kraft paper, streaked kraft paper, single-gloss kraft paper, and the like.

Examples of the bleached wrapping paper include pure white roll paper, double-sided bleached kraft paper, single-gloss bleached kraft paper, and thin imitation paper.

As the paper used for the base material 10A of the packaging bag 10, among these, single-gloss paper is preferable, and single-gloss kraft paper is more preferable. Here, single-gloss paper refers to paper that is obtained by heating and drying with a Yankee dryer after papermaking, and has a glossy surface with high gloss on one side.

The basis weight of the paper used for the base material 10A of the packaging bag 10 is not limited, but is preferably 30 g/m ² or more and 100 g/m ² or less. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011). Note that the basis weight of the paper used for the base material 10A of the packaging bag 10 is preferably changed depending on the number of rolls 20 accommodated in the packaging bag 10.

For example, when the number of rolls 20 accommodated in the packaging bag 10 is four (four rolls), the basis weight of the paper used for the base material 10A of the packaging bag 10 is preferably 30 g/m ² or more and 60 g/m ² or less. . Moreover, when the number of rolls 20 accommodated in the packaging bag 10 is 12 (12 rolls), it is preferable that the basis weight of the paper used for the base material 10A of the packaging bag 10 is 50 g/m ² or more and 100 g/m ² or less. .

The thickness of the base material 10A constituting the packaging bag 10 is not limited, but is, for example, preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 90 μm or less, and still more preferably 40 μm or more and 75 μm or less. Note that the thickness is measured in accordance with the regulations of JIS P 8118 (2014).

<Coating area of heat sealant>
As shown in FIG. 9, in the package 100, a heat sealing agent is applied to the entire surface of the base material 10A, except for the area 18 on the surface (contact surface) of the base material 10A that contacts the plurality of rolls 20. ing. In FIG. 9, numerals 11 to 16 correspond to the numerals 11 to 16 in FIG. 1, which indicate packaging bodies in which rolled sanitary tissue paper is housed, and when the packaging bag 10 shown in FIG. 1 is unfolded. Shows the corresponding position.

As the heat sealing agent, a known material can be used, and for example, a polyolefin-based melt can be used. As a method for applying the heat sealant, a known printing technique can be used, for example, a gravure coating method can be used.

In the example shown in FIG. 9, the area 18 includes an area where the circumferential surface 21A of each roll 20 contacts the base material 10A when the roll 20 is packaged in the packaging bag 10 (peripheral surface contact area 18A), and an upper surface of the roll 20. The area where the corner (top corner) 23B on the 21B side contacts the base material 10A (top corner contact area 18B), and the corner (bottom corner) 23C on the bottom surface 21C of the roll 20 contacts the base material 10A. (lower surface corner contact area 18C), and a region where the roll 20 does not contact the base material 10A (FIGS. 1, 7, 8, and 9).

In addition, in FIG. 9, line C indicates the virtual center line of the package 100 in the length direction (X direction) of the package 100 (the part where the roll 20 is adjacent and the peripheral surface 21A of the roll 20 does not contact the base material 10A). ) is shown. Line D indicates an imaginary line that defines the upper corner contact area 18B with the seal portion 30. Line E indicates an imaginary line that defines the bottom corner contact area 18C with the seal portion 40.

The width of the region 18 is 200 to 250 mm, preferably 220 to 240 mm, so that the region 18 touches the ridgelines of the circumferential surface 21A, the upper corner 23B, and the lower corner 23C of the roll 20. The length of the region 18 depends on the number of rolls to be wrapped, but it is preferably the length that spans the entire circumference of the roll 20 to be wrapped, including the

corners

23B and 23C of the roll 20 that contact the base material 10A. .

In the package 100 according to the present embodiment, as described above, since the heat sealing agent is not applied to the circumferential surface contact area 18A of the base material 10A, the circumferential surface 21A of each roll 20 is heat-sealable to the base material 10A. It does not touch

layers

30, 40, 50. Therefore, even if a plurality of rolls 20 are packaged using the base material 10A in which the heat seal layers 30, 40, and 50 are formed on the contact surface (the surface that contacts the plurality of rolls 20 of the base material 10A), each The quality and appearance of the roll 20 are not easily impaired.

Moreover, even if the upper surface 21B and lower surface 21C of the roll 20 come into contact with the heat seal layers 30, 40, and 50, there is relatively little possibility that the quality or appearance will be impaired. Therefore, in the package 100, even if a plurality of rolls 20 are packaged with the base material 10A provided with the heat-sealing

layers

30, 40, and 50, the quality and appearance of each roll 20 are not impaired. , it is possible to ensure sealing performance as a package.

Furthermore, in the package 100, the peripheral surface contact area 18A of the base material 10A to which no heat sealant is coated is an area where printing is easy, and is a conspicuous position on the outer surface of the package 100 when the roll 20 is packaged. becomes. Therefore, even when a plurality of rolls 20 are packaged with the base material 10A provided with the heat-sealing

layers

30, 40, and 50, printing can be applied to a conspicuous position on the outer surface of the package 100.

In addition, since the heat sealing agent is not coated on the peripheral surface contact area 18A that occupies most of the base material 10A, the area to be coated with the heat sealing agent is reduced. The amount of heat sealant can be reduced.

In addition, in the package 100 according to the present embodiment, as described above, in addition to the peripheral surface contact area 18A of the base material 10A, the upper surface corner contact region 18B and the lower surface corner contact region 18C of the base material 10A are also heat-sealed. Agent is not applied. Thereby, both

corners

23B and 23C of each roll 20 do not come into contact with the heat seal layers 30, 40, and 50. Therefore, even if a plurality of rolls 20 are packaged using the base material 10A having the heat seal layers 30, 40, 50 formed on the contact surface, the quality and appearance of each roll 20 are less likely to be impaired.

Furthermore, by not applying the heat sealing agent to the portions that come into contact with the

corners

23B and 23C of the roll 20 to be wrapped, the uncoated area 18 can be formed into a narrow linear shape. Therefore, it is possible to prevent the outer shape of the area to be coated from becoming complicated.

In the package 100 according to the present embodiment, as described above, the heat sealant is applied to the contact surface of the base material 10A, where the quality and appearance of each roll 20 are particularly likely to be impaired when it comes into contact with the heat seal layers 30, 40, and 50. Not engineered. Therefore, in the package 100, even when a plurality of rolls 20 are packaged in the caramel method, the quality and appearance of each roll 20 are not impaired, the sealing performance of the package is ensured, and the outer surface of the package is conspicuous. Printing can be done at the location.

Furthermore, as described above, by configuring the

corners

23B and 23C of each roll 20 to not come into contact with the heat sealing layers 30, 40, and 50, each roll Even if the

corners

23B and 23C of the rolls 20 receive strong pressure from the base material 10A, the quality and appearance of each roll 20 are not easily impaired.

In the package 100 according to the present embodiment, as described above, the heat sealant is applied to the contact surface of the base material 10A, where the quality and appearance of each roll 20 are particularly likely to be impaired when it comes into contact with the heat seal layers 30, 40, and 50. Since no heat sealing agent is used, each roll 20 is not easily affected by the heat sealing agent, regardless of the form of the roll 20.

Therefore, in the packaging body 100, each roll 20 to be wrapped using the base material 10A having the heat-sealing

layers

30, 40, 50 formed on the contact surface is made of kitchen paper, paper towel, toilet paper, or tissue paper. Even if there is such a problem, printing can be performed at a conspicuous position on the outer surface of the package while ensuring the sealing properties of the package without impairing the quality or appearance of each roll 20.

Note that the package 100 may include at least a base material 10A for packaging a plurality of rolls 20 stacked vertically in two or more stages. In this case, the circumferential contact area 18A, the area where the top corner 23B of the top roll 20 contacts the base material 10A (top corner contact area 18B), and the bottom corner 23C of the bottom roll 20 contact the base 10A. A heat sealing agent is applied to the entire surface of the base material 10A except for the contact area (lower surface corner contact area 18C).

As a result, the upper corner 23B of the uppermost roll 20 and the lower corner 23C of the lowermost roll 20 do not come into contact with the heat seal layers 30, 40, and 50. Therefore, even when a plurality of rolls 20 are stacked in at least two or more stages along the central axis of the rolls and packaged using the base material 10A on which the heat-sealing

layers

30, 40, and 50 are formed on the contact surfaces, each roll 20 quality and appearance are not easily impaired.

The area to which the heat sealing agent is applied is, for example, in the packaging body 100 shown in FIG. 1, the circumferential surface 21A, the upper surface 21B, and the lower surface 21C of the packaging bag 10 and the rolls 20 when a plurality of rolls 20 are packaged. A rectangular area that includes all of the areas in contact with can be set as an area to which no heat sealing agent is applied.

By making such a rectangular area an area where no heat sealing agent is applied, the heat sealing layer 30 and all surfaces of the roll 20 to be packaged, including the

corners

23B and 23C, are coated with the

heat sealing layer

30, 40, and 50. , 40, and 50 never come into contact with each other. Therefore, not only during the packaging process of the roll 20 but also through the distribution and sale of the roll 20, the roll 20 does not come into contact with the heat sealing layers 30, 40, 50 of the base material 10A, so the quality of the roll 20 can be improved by the heat sealing agent. The appearance is further less likely to be damaged.

In particular, if the heat sealant is likely to adhere to the roll 20 due to the material of the roll 20 and the properties of the heat sealant, the heat sealant may be applied to the base material while a plurality of rolls 20 are packaged. A rectangular area that includes all of the circumferential contact area 18A, the top corner contact area 18B, and the bottom corner contact area 18C of 10A may be an area to which no heat sealing agent is applied. This can prevent the heat sealant from adhering to the roll 20. Furthermore, the amount of heat sealant used can be further reduced.

Note that in the base material 10A constituting the packaging bag 10, the other surface of the base material 10A remains a paper base material (FIGS. 9 to 11). Note that a resin layer can be formed on the other surface to function as a coating layer that protects the outer surface of the package. Further, the resin layer can have an area where a design or characters can be printed on the outer surface of the package 100.

The material of the resin layer is not particularly limited, but is, for example, a thermoplastic resin, preferably low-density polyethylene. Note that the low-density polyethylene may be either high-pressure low-density polyethylene (LDPE) or linear low-density polyethylene (L-LDPE).

Although the embodiments of the present invention have been described above, the present invention is not limited to specific embodiments, and various modifications and changes can be made within the scope of the invention described in the claims. .

Hereinafter, preferred embodiments of the present invention will be additionally described.

A first aspect of the present invention is a package including a paper base material for packaging a plurality of rolls of sanitary tissue paper, the surface of the paper base material being in contact with the plurality of rolls of sanitary tissue paper. In the package for rolled sanitary tissue paper, the peripheral surface of each roll of sanitary tissue paper is coated with a heat sealing agent except for the area where the peripheral surface contacts the paper base material.

Here, in a roll of sanitary tissue paper (hereinafter sometimes referred to as a "roll"), one of the two end surfaces spaced apart in the direction of the central axis of the roll is referred to as the upper surface, and the other end surface is referred to as the lower surface. Note that the top and bottom surfaces are relative; for example, the top and bottom are not fixed. In addition, the area coated with the heat sealing agent on the surface of the paper base that comes into contact with each roll of sanitary tissue paper (hereinafter sometimes referred to as the "contact surface" or "contact surface of the paper base") is heated. A sealing layer is formed.

Further, the circumferential surface of the roll constitutes a side surface between the upper surface and the lower surface of the roll. In addition, in each wrapped roll, the peripheral surface of the roll is a part where the quality and appearance of each roll are particularly likely to be impaired when it comes into contact with the heat-sealing layer of the paper base material.

In the first aspect, a heat sealing agent is applied to the area where the circumferential surface of each roll contacts the paper base material (hereinafter sometimes referred to as "peripheral surface contact area" or "peripheral surface contact area of paper base material"). Since the paper is not coated, the circumferential surface of each roll does not come into contact with the heat-sealing layer of the paper base material. Therefore, even if a plurality of rolls are packaged using a paper base material with a heat seal layer formed on the contact surface, the quality and appearance of each roll is unlikely to be impaired.

In addition, in the first aspect, an area where the upper surface of the roll contacts the paper base material, which is an area other than the peripheral surface contact area of the paper base material (hereinafter referred to as "top surface contact area" or "top surface contact area of the paper base material") A heat sealing agent is applied to the area where the bottom surface of the roll contacts the paper base material (hereinafter sometimes referred to as the "bottom contact area" or "bottom contact area of the paper base material"). become.

However, even if the upper and lower surfaces of the roll come into contact with the heat-sealing layer, there is relatively little possibility that the quality or appearance will be impaired. Therefore, in the first aspect, even if a plurality of rolls are packaged with a paper base material provided with a heat-sealing layer, the sealability of the package can be ensured without impairing the quality or appearance of each roll. I can do it.

Furthermore, in the first aspect, the peripheral surface contact area of the paper base material not coated with the heat sealant is an area that is easy to print, and moreover, it is a conspicuous position on the outer surface of the package when the roll is packaged. Become. Therefore, even when a plurality of rolls are packaged with a paper base material provided with a heat-sealing layer, printing can be applied to a conspicuous position on the outer surface of the package.

A second aspect of the present invention is a packaging body including a paper base material for packaging a plurality of rolls of sanitary tissue paper, the surface of the paper base material being in contact with the plurality of rolls of sanitary tissue paper. A heat sealing agent is applied to the circumferential surface of each roll of sanitary tissue paper and the area where the corner formed by the circumferential surface and the top or bottom surface of each roll of sanitary tissue paper comes into contact with the paper base material. This is a package for roll-shaped sanitary tissue paper that has been manufactured using the following methods.

In addition, in each wrapped roll, the corners formed by the circumferential surface and the top surface of each roll (hereinafter sometimes referred to as "top corners") receive strong pressure from the paper base material, and the This is a corner formed by the circumferential surface and the lower surface of the roll (hereinafter sometimes referred to as "lower surface corner"). Therefore, the quality and appearance of each roll are particularly likely to be impaired when the upper and lower corners of each roll come into contact with the heat-sealing layer.

In the second aspect, in addition to the peripheral surface contact area, the upper surface corner and the lower surface corner of each roll contact the paper base material (hereinafter, "corner contact area" or "paper base material corner contact area"). ”) are also not coated with heat sealant. As a result, both corners of each roll do not come into contact with the heat-sealing layer, so even if multiple rolls are packaged using a paper base material with a heat-sealing layer formed on the contact surface, the quality of each roll is high. and the appearance is less likely to be damaged.

A third aspect of the present invention is a packaging body including a paper base material for packaging a plurality of rolls of sanitary tissue paper stacked vertically in at least two or more stages, wherein the peripheral surface of each roll of sanitary tissue paper is A region where a corner formed by the circumferential surface and the upper surface of the roll-shaped sanitary tissue paper in the upper tier and a corner formed by the circumferential surface and the lower surface of the roll-shaped sanitary tissue paper in the lowermost tier contact the paper base material. This is a package for rolled sanitary tissue paper coated with a heat sealing agent.

In this specification, the case where a plurality of rolls of sanitary tissue paper are stacked vertically in at least two or more stages refers to the case where two or more rolls are stacked (or lined up in series) along the same axis. . The top roll refers to the outermost roll of one of the stacked rolls, and the bottom roll refers to the other outermost roll.

In addition, when a plurality of rolls are stacked in two or more stages along the central axis of the rolls for packaging, the roll located at the top stage (hereinafter referred to as the "top roll") receives strong pressure from the paper base material. and the bottom corner of the roll located at the lowest stage (hereinafter sometimes referred to as "lowest roll"). That is, the upper corner of the uppermost roll and the lower corner of the lowermost roll are parts where the quality and appearance of each roll are particularly likely to be impaired when they come into contact with the heat seal layer.

In the third aspect, in addition to the circumferential surface contact area, there is a region where the upper surface corner of this uppermost roll contacts the paper base material (hereinafter, "upper surface corner contact region" or "upper surface corner contact region of the paper base material"). ) and the area where the lower corner of the bottom roll contacts the paper base material (hereinafter sometimes referred to as the "lower corner contact area" or the "lower corner contact area of the paper base"). Also, no heat sealant is applied.

As a result, the upper corner of the uppermost roll and the lower corner of the lowermost roll do not come into contact with the heat seal layer. Therefore, in the second aspect, even when a plurality of rolls are stacked in at least two or more stages along the central axis of the rolls and packaged using a paper base material with a heat-sealing layer formed on the contact surface, each roll The quality and appearance of the product are not easily damaged.

In addition, in the third aspect, heat is applied to the upper surface contact area of the uppermost roll or the lower surface contact area of the lowermost roll, which is an area other than the peripheral surface contact area, the upper surface corner contact area, and the lower surface corner contact area of the paper base material. A sealant will be applied.

However, even if the upper surface of the uppermost roll and the lower surface of the lowermost roll come into contact with the heat-sealing layer, there is relatively little possibility that the quality or appearance will be impaired. Therefore, in the third aspect, even if a plurality of rolls are packaged with a paper base material provided with a heat-sealing layer, the sealability of the package can be ensured without impairing the quality or appearance of each roll. I can do it.

Furthermore, in the third aspect as well, the peripheral surface contact area of the paper base material that is not coated with the heat sealant is an area that is easy to print, and moreover, it is a conspicuous position on the outer surface of the package when the roll is packaged. Become. Therefore, even when multiple rolls are stacked on top of each other in at least two or more layers along the center axis of the rolls using a paper base material with a heat seal layer formed on the contact surface, it is possible to Can be printed.

A fourth aspect of the present invention is a package for rolled sanitary tissue paper according to any of the first to third aspects, in which the plurality of rolls of sanitary tissue paper are wrapped in a caramel method.

In the fourth aspect, the heat sealing agent is not coated on the contact surface of the paper base material (the surface of the paper base material that comes into contact with the roll), which tends to impair the quality and appearance of each roll when it comes into contact with the heat seal layer. . Therefore, even when packaging multiple rolls using the caramel method, it is possible to print in a conspicuous position on the outside of the package while ensuring the sealability of the package without compromising the quality or appearance of each roll. can.

In addition, in the fourth aspect, when a plurality of rolls are packaged in the caramel method, the corners of each roll (in the case where a plurality of rolls of sanitary tissue paper are stacked vertically in at least two or more layers, the top corner of the top roll) (and the bottom corner of the bottom roll) are susceptible to strong pressure from the paper base material. However, in the fourth aspect, by configuring the corners of each roll so that they do not come into contact with the heat-sealing layer, the corners of each roll are strong from the paper base material when packaging multiple rolls using the caramel method. Even when subjected to pressure, the quality and appearance of each roll is less likely to be impaired.

A fifth aspect of the present invention is a rolled sanitary thin paper according to any of the first to fourth aspects, wherein the rolled sanitary thin paper is any one of kitchen paper, paper towel, toilet paper, or tissue paper. It is a package for

In the fifth aspect, since the heat sealing agent is not coated on the contact surface of the paper base material, which tends to impair the quality and appearance of each roll when it comes into contact with the heat seal layer, each roll is less affected by heat sealants.

Therefore, in the fifth aspect, each roll to be packaged using a paper base material having a heat-sealing layer formed on the contact surface may be a kitchen paper, a paper towel, a toilet paper or a tissue paper. Printing can be applied to a conspicuous position on the outer surface of a package while ensuring the sealability of the package without impairing the quality or appearance of the roll.

This application claims priority based on Japanese Patent Application No. 2022-088488 filed on May 31, 2022, and its entire contents are incorporated herein.

100 Packaging body 10 Packaging bag 10A Base material (paper base material)
11 Top surface 12

Bottom surface

13, 14 Side surfaces 15, 16 End surface 18 Area (area where heat sealant is not applied)
18A Peripheral contact area 18B Top corner contact area 18C Bottom corner contact area 20 Roll (rolled sanitary tissue paper)
21 Long sheet

21A Circumferential surface

21B Top surface

21C Bottom surface 23B Corner (top corner)
23C corner (bottom corner)
30, 40, 50 Seal part (heat seal layer)

Claims

A packaging body including a paper base material for packaging a plurality of rolls of sanitary tissue paper, the packaging body comprising:
A heat sealing agent is coated on the surface of the paper base material that comes into contact with the plurality of rolls of sanitary tissue paper, except for the area where the peripheral surface of each roll of sanitary tissue paper contacts the paper base material. ,
Packaging for rolled sanitary tissue paper.
A packaging body including a paper base material for packaging a plurality of rolls of sanitary tissue paper, the packaging body comprising:
A corner portion formed by the circumferential surface of each of the rolled sanitary thin papers and the circumferential surface and the upper or lower surface of each of the rolled sanitary thin papers is provided on the surface of the paper base material that comes into contact with the plurality of rolled sanitary thin papers. A heat sealing agent is coated except for the area in contact with the paper base material,
Packaging for rolled sanitary tissue paper.
A packaging body including a paper base material for packaging a plurality of rolls of sanitary tissue paper stacked in at least two or more layers vertically,
The circumferential surface of each roll of sanitary tissue paper, the corner formed by the circumferential surface and the top surface of the topmost roll of sanitary tissue paper, and the corner formed by the circumferential surface and bottom surface of the bottom roll of sanitary tissue paper. A heat sealing agent is coated except for the area where the part contacts the paper base material,
Packaging for rolled sanitary tissue paper.
the plurality of rolls of sanitary tissue paper are packaged in a caramel style;
The package for rolled sanitary tissue paper according to any one of claims 1 to 3.
The rolled sanitary tissue paper is any one of kitchen paper, paper towel, toilet paper, or tissue paper.
The package for rolled sanitary tissue paper according to any one of claims 1 to 3.