JP7597004B2 - Packaging - Google Patents

Description

Applicable under Article 30, Paragraph 2 of the Patent Act Exhibition name: 2021 Tokyo International Packaging Exhibition Venue: Tokyo Big Sight (3-11-1 Ariake, Koto-ku, Tokyo) Date held: February 24, 2021 - February 26, 2021 Date of sale: May 20, 2021 Place of sale: Online shop (URL: https://shop.e-nepia.com/shop/default.aspx) Date of publication: May 20, 2021 Publication address: https://e-nepia. com/news/dtl. php? nm_id = 124 Date of sale: June 7, 2021 Location of sale: Seico Mart Maruyama Kita 5-jo Store (1-12, Kita 5-jo Nishi 28-chome, Chuo-ku, Sapporo) Date of sale: June 7, 2021 Location of sale: Seico Mart Kita 5-jo Dori Store (Kita 4-jo Nishi 22-chome, Chuo-ku, Sapporo) Date of sale: June 7, 2021 Location of sale: Seico Mart Maruyama Koen Store (1-3, Odori Nishi 26-chome, Chuo-ku, Sapporo) and 87 other stores Date of publication: June 4, 2021 Posting address: https://secoma.co.jp/release/index. html Date of sale: August 13, 2021 Place of sale: Online shop (URL: https://lohaco.yahoo.co.jp/) Date of sale: October 2, 2021 Place of sale: Life Funabori store (7-20-22 Funabori, Edogawa-ku, Tokyo)

The present invention relates to a package in which a roll of sanitary tissue paper or a laminate of sanitary tissue paper is wrapped in paper material.

Conventionally, packages have been known in which sanitary thin paper such as toilet paper or kitchen paper is rolled up (hereinafter also referred to as "rolled sanitary thin paper" or "rolled sanitary thin paper"), or laminates of sanitary thin paper such as tissue paper or wipes are bundled together and wrapped in film; such packages are described, for example, in Patent Document 1 and Patent Document 2.

In recent years, the problem of plastic waste has become more serious worldwide, and there is a demand to change packaging materials from plastic to other materials in order to improve the global environment. For example, Patent Document 3 and Patent Document 4 propose changing the packaging material from plastic to paper even in the case of a package in which rolls or laminates of sanitary tissue paper are packaged together.

JP 2004-269010 A JP 2016-188092 A JP 2021-054436 A JP 2021-070501 A

However, simply changing the packaging material from plastic to paper raises the risk that the bottom of the package may be rubbed and accidentally torn when it is transported, or that water on the floor may seep in through the bottom of the package and soil the contents when the package is stored on the floor. For this reason, there is still room for improvement in the structure of the package from the standpoint of the abrasion resistance and waterproofing of the bottom of the package.

The object of the present invention is to easily and inexpensively improve the abrasion resistance and waterproofing of the bottom surface of a package in which a roll or stack of sanitary tissue paper is bundled together and wrapped in paper.

The package according to the present invention is a package in which a plurality of rolls of sanitary tissue paper or sanitary tissue paper laminates are bundled together and wrapped in wrapping paper, and is characterized in that a part of the outer surface of the wrapping paper has a heat seal layer for sealing the bottom surface, and at least a part of the bottom surface is covered with the heat seal layer for sealing the bottom surface.

With this configuration, at least a portion of the bottom surface is covered with the heat seal layer for sealing the bottom surface, so that the heat seal layer for sealing the bottom surface effectively contributes to improving the abrasion resistance and waterproofing of the bottom surface, making it possible to easily improve the abrasion resistance and waterproofing of the bottom surface at low cost.

The package according to the present invention is characterized in that the entire bottom surface is covered with the heat seal layer for sealing the bottom surface.

With this configuration, the entire bottom surface is covered with the heat seal layer for sealing the bottom surface, so that the heat seal layer for sealing the bottom surface contributes more effectively to improving the abrasion resistance and waterproofing of the bottom surface, making it possible to further improve the abrasion resistance and waterproofing of the bottom surface at low cost and easily.

Furthermore, the package according to the present invention is characterized in that the corner between the bottom surface and the peripheral surface is covered over the entire circumferential area with the heat seal layer for sealing the bottom surface.

With this configuration, the corners between the bottom surface and the periphery are covered in their entire circumferential direction by the heat seal layer for sealing the bottom surface, so the corners between the bottom surface and the periphery, which are relatively prone to tearing, can be reinforced easily and at low cost by the heat seal layer.

In addition, the package according to the present invention is characterized in that a portion of the outer surface of the wrapping paper has a heat seal layer for sealing the top surface, and at least a portion of the top surface is covered by the heat seal layer for sealing the top surface.

With this configuration, at least a portion of the top surface is covered with a heat seal layer for sealing the top surface, which contributes to improving the wear resistance and waterproofing of the top surface, and the wear resistance and waterproofing of the top surface can also be improved easily and at low cost. This is particularly effective when multiple packages are stacked for storage.

The package according to the present invention is characterized in that the top surface is covered over its entire area with the heat seal layer for sealing the top surface.

With this configuration, the entire top surface is covered with a heat seal layer for sealing the top surface, which effectively contributes to improving the abrasion resistance and waterproofing of the top surface, and the abrasion resistance and waterproofing of the top surface can be improved easily and at low cost.

The packaging body according to the present invention is characterized in that the corner between the top surface and the peripheral surface is covered over the entire circumferential area with the heat seal layer for sealing the top surface.

With this configuration, the corners between the top and peripheral surfaces are covered over the entire circumferential area with the heat seal layer for sealing the top surface, so the corners between the top and peripheral surfaces, which are relatively prone to tearing, can be reinforced easily and at low cost with the heat seal layer for sealing the top surface.

The packaging material according to the present invention is characterized in that the basis weight of the packaging paper is 30 g/m ² to 65 g/m ² .

This configuration makes the wrapping paper less likely to tear, provides good water resistance, and improves the seal strength of the bottom and top surfaces.

According to the present invention, at least a portion of the bottom surface of the package is covered with a heat seal layer for sealing the bottom surface, so that the heat seal layer for sealing the bottom surface effectively contributes to improving the abrasion resistance and waterproofing of the bottom surface of the package, and the abrasion resistance and waterproofing of the bottom surface of the package can be improved easily and at low cost.

FIG. 2 is an overall oblique view of a package in which multiple rolls of sanitary thin paper are caramel-packaged according to one embodiment of the present invention. FIG. 2 is a plan view of the bottom surface of a package according to one embodiment of the present invention. This is a plan view of a packaging bag of a packaging body according to one embodiment of the present invention, viewed from the outer surface of the wrapping paper after the heat seals at the top and bottom of the packaging body and the heat seals on the glue tab have been peeled off and the bag is unfolded.

The form of the package according to the present invention will be described in detail with reference to Figures 1 to 3. However, the present invention is not limited to this form.

As described above, the sanitary thin paper of the present invention includes toilet paper, kitchen paper, tissue paper, wipers, etc., and in the description of this specification and claims, "rolled sanitary thin paper" refers to sanitary thin paper such as toilet paper or kitchen paper rolled into a roll, and "sanitary thin paper laminate" refers to sanitary thin paper such as tissue paper or wipers folded and laminated. In the following embodiment, a form in which rolled sanitary thin paper is caramel-wrapped in a paper packaging bag (hereinafter also referred to as "wrapping paper") will be described.

In addition, in the present specification and claims, the terms "top surface" and "bottom surface" refer to the surfaces that are defined by the packaging bag in which the rolled sanitary tissue paper or sanitary tissue paper laminate is packaged and that are exposed to the outside. However, these terms are used merely for convenience and do not, of course, define absolute positions in the direction of gravity. The same applies to terms such as "top" and "bottom."

Furthermore, in this specification, claims, and drawings, the "height direction," "width direction," and "length direction" are perpendicular to each other, and the "roll parallel direction" corresponds to either the above-mentioned "width direction" or "length direction."

For ease of explanation, the overall perspective view in Figure 1 shows the contents in a see-through state.

Figure 1 is an overall perspective view of a package 1 in which multiple rolls of sanitary tissue paper 2 are caramel-wrapped according to one embodiment of the present invention, Figure 2 is a plan view of the bottom of the package 1 according to this embodiment, and Figure 3 is a plan view of a packaging bag 10 of the package 1 according to this embodiment, seen from the outer surface of the package after the heat-sealed layers 12 at the top and bottom and the heat-sealed layer 12 at the glue tab 11 of the package 1 have been peeled off and the package 1 is unfolded. The unfolded package in Figure 3 is designated 10D.

The packaging body 1 according to the present invention is a body-wrapped packaging of a plurality of rolled sanitary thin papers (toilet rolls in this embodiment) 2, which are arranged in parallel so that both end faces are aligned in a direction perpendicular to the axial direction, wrapped in paper material (paper materials). As shown in FIG. 1, the packaging body 1 according to the present embodiment is a caramel-wrapped packaging of four toilet rolls 2 in two rows and two columns, wrapped in paper material. Examples of the paper material include coated paper, kraft paper, and laminated paper. The paper material is obtained by papermaking a slurry containing a pulp component, which is a fiber raw material. Examples of the pulp component include wood pulp, non-wood pulp, and recycled paper pulp. In this embodiment, the paper material is a one-sided gloss paper having a gloss on the outside. A known caramel-wrap may be used for the caramel-wrap. Specifically, for example, first, the toilet roll 2 placed on the flat paper material is wrapped in a roll-wrapped manner, and the overlapping portion in the rolling direction is bonded via a heat seal layer described later. Next, the excess portion that extends beyond the end face position of the sanitary paper roll 2 is folded toward the end face side of the sanitary paper roll 2 (folded in a mountain fold and a valley fold along the mountain fold line and valley fold line indicated by the symbols UFL and DFL in FIG. 3, respectively). Then, the leading edge portions of the triangular or trapezoidal pieces formed during folding are glued together to cover the toilet roll 2 from the upper and lower end faces. A known device can be used as a device for performing this type of caramel wrapping.

The paper material in the packaging body 1 is bonded by the heat seal method as described above. For bonding by the above method, a heat seal agent that exhibits an adhesive function when heat is applied is applied to the paper material (one or both sides of the glue margin 11 and the folded portion) in advance to provide a heat seal layer. As shown in FIG. 3, the heat seal layer 12 is applied to the outer surface of the unfolded packaging paper 10D, that is, the portion shown by diagonal hatching in the figure, that is, the glue margin 11 and the peripheral portion of the packaging paper 10D. That is, as shown in FIG. 3, the heat seal layer 12 is provided in a U-shape on the peripheral side of one surface (outer surface) of the rectangular packaging paper 10D. When the toilet roll 2 is packaged, the heat seal layer 12 exposed on the bottom surface 10B side and the top surface 10T side of the packaging body 1 is the heat seal layer 12B for bottom surface sealing and the heat seal layer 12T for top surface sealing, respectively, which will be described later. Examples of materials that can be used to form the heat seal layer 12 include polyolefin resins and other thermoplastic resins.

As shown in Figures 1 to 3, the package 1 according to this embodiment is a package of four toilet rolls 2 wrapped in wrapping paper, with a bottom-sealing heat seal layer 12B on part of the outer surface of the wrapping paper, and at least a part of the bottom surface 10B is covered by the bottom-sealing heat seal layer 12B.

With this configuration, at least a portion of the bottom surface 10B is covered with the bottom surface sealing heat seal layer 12B, so that the bottom surface sealing heat seal layer 12B can effectively contribute to improving the abrasion resistance and waterproofing of the bottom surface 10B.

More specifically, in this embodiment, as shown in Figures 1 and 2, the entire bottom surface 10B is covered with a bottom sealing heat seal layer 12B.

With this configuration, the entire bottom surface 10B is covered with the heat seal layer 12B for sealing the bottom surface, so that the heat seal layer 12B for sealing the bottom surface can more effectively contribute to improving the abrasion resistance and waterproofing of the bottom surface 10B.

More specifically, in this embodiment, as shown in Figures 1 to 3, the corner 10CB between the bottom surface 10B and the peripheral surface 10P is covered over its entire circumferential area by the bottom sealing heat seal layer 12B.

With this configuration, the corner 10CB between the bottom surface 10B and the peripheral surface 10P is covered over its entire circumferential area with the bottom surface sealing heat seal layer 12B, so that the corner 10CB between the bottom surface 10B and the peripheral surface 10P, which is relatively prone to tearing, can be reinforced easily and at low cost with the heat seal layer 12B. In this embodiment, the corner 10CB is an edge that separates the bottom surface 10B and the peripheral surface 10P, and is linear. However, in the present invention, the corner 10CB may be a strip having a width, that is, it may extend along the circumferential direction of the package 1 so as to extend beyond the bottom surface 10B side and/or the peripheral surface 10P side. The same applies to the corner 10CT on the top surface 10T side described later.

Furthermore, in this embodiment, as shown in Figures 1 and 3, a part of the outer surface of the wrapping paper has a heat seal layer 12T for sealing the top surface, and the heat seal layer 12T for sealing the top surface covers at least a part of the top surface 10T.

With this configuration, at least a portion of the top surface 10T is covered with the heat seal layer 12T for sealing the top surface, which contributes to improving the abrasion resistance and waterproofing of the top surface 10T. This is particularly effective when multiple packages 1 are stacked for storage.

More specifically, in this embodiment, as shown in Figures 1 and 3, the entire top surface 10T is covered with a heat seal layer 12T for sealing the top surface.

With this configuration, the entire top surface 10T is covered with the heat seal layer 12T for sealing the top surface, so that the heat seal layer 12T for sealing the top surface can more effectively contribute to improving the abrasion resistance and waterproofing of the top surface 10T.

More specifically, in this embodiment, as shown in Figures 1 and 3, the corner 10CT between the top surface 10T and the peripheral surface 10P is covered over its entire circumferential area by the heat seal layer 12T for sealing the top surface.

With this configuration, the corner 10CT between the top surface 10T and the peripheral surface 10P is covered over its entire circumferential area with the heat seal layer 12T for sealing the top surface, so that the corner 10CT between the top surface 10T and the peripheral surface 10P, which is relatively prone to tearing, can be reinforced at low cost and easily with the heat seal layer 12T for sealing the top surface.

In order to achieve the effects of the present invention, the basis weight of the wrapping paper is preferably 30 g/ ^m2 to 65 g/ ^m2 . This configuration makes the wrapping paper less likely to tear, provides good water resistance, and improves the seal strength of the bottom surface 10B and top surface 10T. That is, if the basis weight of the wrapping paper is less than 30 g/ ^m2 , the wrapping paper is more likely to tear and does not provide good water resistance. Also, if the basis weight of the wrapping paper exceeds 65 g/ ^m2 , the heating temperature of the heat seal layer 12 decreases when sealing the bottom surface 10B and top surface 10T, and good seal strength cannot be obtained (seal strength decreases).

Conventionally, packages in which rolls or laminates of sanitary tissue paper are bundled and wrapped in film are known. However, in recent years, the problem of plastic waste has become more serious worldwide, and there is a desire to change the packaging material from plastic to other materials in order to improve the global environment. For example, Patent Document 3 and Patent Document 4 propose changing the packaging material from plastic to paper even in packages in which rolls or laminates of sanitary tissue paper are bundled and wrapped.

However, simply changing the packaging material from plastic to paper raises the risk that the bottom of the package may rub against each other during transportation and tear, or that water on the floor may seep in through the bottom of the package and soil the contents when the package is stored on the floor.

According to this embodiment, since at least a part of the bottom surface 10B (and top surface 10T) of the package 1 is covered with the bottom surface sealing heat seal layer 12B (and top surface sealing heat seal layer 12T), the bottom surface sealing heat seal layer 12B (and top surface sealing heat seal layer 12T) can effectively contribute to improving the wear resistance and waterproofing of the bottom surface 10B (and top surface 10T) of the package 1. In addition, when the ends of the wrapping paper are folded and sealed during packaging, adhesive is generally applied to the opposing surfaces to bond them together. In this embodiment, in one process, a heat seal layer is provided not only on the opposing surfaces but also on the exposed parts of the bottom surface 10B (and top surface 10T) of the package 1, so that the wear resistance and waterproofing of the bottom surface 10B (and top surface 10T) of the package 1 can be easily improved at low cost.

Furthermore, in one process, the heat seal layer 12 is also provided on the corners 10CB, 10CT of the package 1, so that the abrasion resistance and waterproofness of the corners 10CB, 10CT of the package 1 can be improved easily and at low cost.

＜Other＞
The present invention is not limited to the above-described embodiment or the modified examples described throughout the specification, and appropriate changes and modifications can be made without departing from the technical concept of the present invention.

For example, in the above embodiment and its modified examples, the heat seal layer 12 is provided on the entire surface of both the bottom surface 10B and the top surface 10T, but the present invention also allows for a configuration in which the heat seal layer 12 is provided on only a portion of the bottom surface 10B and the top surface 10T, and also allows for a configuration in which the heat seal layer 12 is not provided on the top surface 10T side. In addition, in the above embodiment and its modified examples, the heat seal layer 12 is provided on the corners 10CB and 10CT of the bottom surface 10B and the top surface 10T, but this is not limited to the present invention, and the heat seal layer 12 does not have to be provided on the corners 10CB and 10CT. In addition, in the above embodiment, a configuration in which multiple rolls of sanitary thin paper are caramel-wrapped is described, but the present invention is not limited to this, and can also be applied to a case in which multiple sanitary thin paper laminates are packaged in caramel packaging, and can also be applied to a case in which multiple rolls of sanitary thin paper or sanitary thin paper laminates are packaged in other forms such as gusset packaging or pillow packaging.

REFERENCE SIGNS LIST 1 Packaging body 2 Rolled sanitary thin paper 10 Packaging bag 10B Bottom surface 10T Top surface 10P Periphery 10CB Corner (on bottom surface side) 10CT Corner (on top surface side) 10D Unfolded packaging paper UFL Mountain fold line DFL Valley fold line 11 Glue allowance 12 Heat seal layer 12B Heat seal layer for bottom surface sealing 12T Heat seal layer for top surface sealing

Claims (7)

A package in which a plurality of rolled sanitary tissue papers or sanitary tissue paper laminates are bundled together and wrapped in wrapping paper, the wrapping paper having a heat seal layer for sealing a bottom surface on a portion of an outer surface thereof, and at least a portion of the bottom surface is covered by the heat seal layer for sealing a bottom surface;
A package characterized in that no heat seal layer is provided on the peripheral surface except for the glue margin , the corners between the bottom surface and the peripheral surface, and the corners between the top surface and the peripheral surface . The package according to claim 1, characterized in that the entire bottom surface is covered with the bottom sealing heat seal layer. The package according to claim 2, characterized in that the corner between the bottom surface and the peripheral surface is covered over its entire circumferential area by the bottom surface sealing heat seal layer. A package according to any one of claims 1 to 3, characterized in that a part of the outer surface of the wrapping paper has a heat seal layer for sealing the top surface, and at least a part of the top surface is covered by the heat seal layer for sealing the top surface. The package according to claim 4, characterized in that the entire top surface is covered with the heat seal layer for sealing the top surface. The package according to claim 5, characterized in that the heat seal layer for sealing the top surface covers the corner between the top surface and the peripheral surface over the entire circumferential area. 7. The packaging body according to claim 1, wherein the wrapping paper has a basis weight of 30 g/m ² to 65 g/m ² .

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