WO2023047967A1

WO2023047967A1 - Corrugation-crimped package of paper material

Info

Publication number: WO2023047967A1
Application number: PCT/JP2022/033673
Authority: WO
Inventors: 孝士梶塚; 秀俊殿岡; 慶一藤谷; 拓也森
Original assignee: レンゴー株式会社
Priority date: 2021-09-22
Filing date: 2022-09-08
Publication date: 2023-03-30
Also published as: CN117999234A

Abstract

This package is formed by sandwiching a commodity (G) between single-faced corrugated cardboards (1), that is, paper materials disposed along the vertical direction, and by crimping the paper materials together along respective peripheral edge parts (2, 3) thereof, wherein: edge parts (2) of at least two facing sides of the single-faced corrugated cardboards (1) are corrugation-crimped to form a corrugated shape in a thickness direction of the single-faced corrugated cardboards (1); and a size difference between the length L1 of a bent portion of the single-faced corrugated cardboards (1) formed when the commodity (G) is sandwiched therebetween and a flat-bonding length (virtual linear distance) L2 obtained when the edge parts (2) are bonded virtually flat in said direction is absorbed by the corrugation-crimping such that a vertical gap between the single-faced corrugated cardboards (1) at the edge parts (2) is eliminated.

Description

Corrugated crimp packaging of paper material

This invention relates to packaging in which an object to be packaged, such as a product to be shipped, is sandwiched between paper materials arranged in the vertical direction, and the periphery of the paper materials is crimped.

In recent years, mail-order sales using the Internet have become widespread, and when shipping products, products are wrapped in bubble wrap made of plastic film and stored in cardboard boxes, or products are wrapped in plastic film along with cardboard mounts. A packaging form in which the product is wrapped and stored in a cardboard box is often adopted.

With this type of packaging, even if the product is relatively flat, such as a book, the corrugated cardboard box is angular, creating wasted space inside the box and reducing efficiency during transportation.

As a countermeasure, it is conceivable to adopt a package as described in Patent Document 1 below. As shown in FIGS. 9A and 9B, this package sandwiches a product G, such as a book, between two sheets of paper material 51, and the paper materials 51 are separated from each other by edges along each side. At 52, a flat bar is pressed through the adhesive layer to minimize the height of the portion where the product G is sandwiched and to thin the edges.

However, since the paper material 51 has less elongation than the plastic film, in this package, the edges 52 are wrinkled and a gap is generated between the two paper materials 51 .

On the other hand, in Patent Document 2 below, as shown in FIG. 10, when

edge portions

62 and 63 along both sides and edges of a paper material 61 that is folded into a bag are sequentially crimped to form a package, the overlapping portions are formed. A technique is disclosed in which the

edges

62 and 63 of the paper material 61 are pressed together by a processing tool having a fine tooth shape so that the pulp fibers are entangled with each other, and the paper materials 61 are joined together without an adhesive layer. However, the gap between the two sheets of paper 61 cannot be eliminated even by forming a wave having a small wave height and a small pitch with such a fine tooth shape.

JP-A-2006-103722 JP 2010-116182 A

As described above, when the edges of two sheets of paper material sandwiching an object to be packaged are crimped, there is no known technique for eliminating the gap between the edges. When goods to be packaged such as products for mail-order sales are transported, dust and foreign matter may enter the interior of the package, causing the shipping company to receive complaints from customers.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to prevent a phenomenon in which gaps are formed between the edges of vertically arranged paper materials when forming a pressure-bonded package, and to prevent dust and foreign matter from entering while the package is being packaged. do.

In order to solve the above-mentioned problems, the present invention provides a package formed by sandwiching an object to be packaged between paper materials arranged in the vertical direction and pressing the paper materials together at their edges along each side of the periphery. in
The edge portions along at least two opposing sides of the paper material are wavy adhesive formed by pressure bonding so as to form a wavy shape in the thickness direction of the paper material,
The dimensional difference between the length of the portion of the paper material that is bent due to the sandwiching of the package and the length of the flat type adhesion (virtual linear distance) when the edge in that direction is virtually flatly adhered The vertical gap between the paper materials at the edges is eliminated by being absorbed by the corrugated adhesive.

Also, the paper materials arranged in the vertical direction are made up of two paper materials having two sets of opposing sides.

Further, in this package, the edge along one of the two pairs of opposing sides of the two paper materials is the wave-shaped adhesive, and the edge along the other opposing side is the above-mentioned It was supposed to be flat type adhesion.

Alternatively, the edges along all four sides of the two sheets of paper are wavy-bonded.

In addition, the paper material arranged in the vertical direction is obtained by folding one sheet of paper material in half along a folding line, and edge portions along two opposite sides forming a right angle to the folding line is the wave type bonding, and the edge portion along one side facing the folding line is crimped by the flat type bonding.

The paper material is a single-faced corrugated board in which a liner is adhered to one side of corrugated corrugated corrugated corrugated corrugated corrugated corrugated corrugated corrugated corrugated corrugated board.

In forming the corrugated pressure-bonded package of paper materials as described above, the edges of the paper materials arranged in the vertical direction are corrugated, so that the pressing surfaces for pinching and pressing the paper materials are formed in a corrugated shape. Thus, the object of the present invention is to provide a wave-shaped pressing member that is flexible.

Further, in response to the case where the range of variation in the height of the object to be packaged is small, the corrugated pressing member is composed of a rigid mold body having a corrugated top surface and a rigid mold body having a corrugated top surface provided on the top surface of the mold body. and a low-friction layer, and the low-friction layer serves as the pressing surface.

Alternatively, in response to the case where the height of the object to be packaged varies widely, the corrugated pressing member includes a rigid mold body having a corrugated top surface and a rigid mold body provided on the top surface of the mold body. It is composed of a cushion layer and a low-friction layer provided on the surface of the cushion layer, and the low-friction layer serves as the pressing surface.

The corrugated pressing members are provided so as to face the lower board and the upper board which move up and down, respectively, and in a state in which the lower board and the upper board are separated from each other, the pressing surfaces of the corrugated pressing members opposed to each other are provided. , the paper materials arranged in the vertical direction are sent in, an object to be packaged is sandwiched between the paper materials, the lower plate and the upper plate are brought close to each other, and the pressing surfaces of the opposing wave-shaped pressing members press the paper. The object of the present invention is to provide a crimping device for crimping the edges of the paper material and corrugating the edges of the paper material.

In the corrugated pressure-bonded package of paper material according to the present invention, the paper material that is arranged in the vertical direction and sandwiches the packaged object is a paper material that stretches little when the edges along the peripheral sides are crimped. Also, the surplus dimension of the edge due to the bending of the paper material is absorbed by the corrugated bonding, and the gap is eliminated.

As a result, the items to be packaged can be protected from the intrusion of dust and foreign matter, the appearance of the bonded portion is improved, the reliability of the packaging quality is enhanced, and the situation in which the product shipper receives complaints from customers is eliminated. prevented.

FIG. 1 is a perspective view showing a single-faced corrugated corrugated crimp package according to a first embodiment of the present invention. Side view from the same corrugated edge The perspective view which shows the corrugated crimp package of the single-faced corrugated board concerning 2nd Embodiment same as the above. The perspective view which shows the corrugated crimp package of the single-faced corrugated board concerning 3rd Embodiment same as the above. FIG. 2 is a perspective view showing a crimping device for forming a corrugated pressure-bonded package according to the first embodiment of the same, which is provided with a corrugated pressing member having a cushion layer. FIG. 11 is a side view showing a state of crimping by a corrugated pressing member having the same cushion layer. The side view which shows the state after crimping of the corrugated adhesion same as the above. The side view showing the state at the time of crimping by the corrugated pressing member without the same cushion layer. The side view which shows the state after crimping of the corrugated adhesion same as the above. The perspective view which shows the package of patent document 1. Longitudinal cross-sectional view of the same as above The perspective view which shows the package of patent document 2. Side view showing the stipulated name of the dimensional relationship related to corrugated bonding

<Embodiment of package>
(First embodiment)
1A and 1B show a first embodiment of a corrugated crimp package according to the present invention.

This package uses a single-faced corrugated cardboard 1 with a corrugated corrugated corrugated medium with a liner attached to one side thereof as a paper material, and the corrugated corrugated mediums are faced to each other, and a product such as a book or the like is packaged. G is sandwiched between two single-faced cardboards 1, and the single-faced cardboards 1 are pressed against each other at

edges

2, 3 along two sides facing each other to form an envelope shape.

Edges 2 along one of two opposite sides of this package extend in the conveying direction specified in the manufacturing process of the single-faced corrugated board 1, and the two single-faced corrugated boards 1 are wavy in the thickness direction. It is a corrugated adhesive that is compression molded using an adhesive. Any adhesive can be used as long as it can adhere paper, and a vinyl acetate emulsion adhesive is preferred. The details of the corrugated bonding will be described later in the section <Compression processing>.

In addition, the edges 3 along the other two opposing sides extend in the width direction perpendicular to the conveying direction of the single-faced corrugated board 1, and two single-faced corrugated boards 1 are usually pressed with a flat bar using an adhesive. It is considered as a flat type adhesion that is flatly adhered by pressure bonding. It should be noted that it is also possible to adopt a flat-type adhesion in which the binding portion binds by pinching pressure without using an adhesive.

(Second embodiment)
FIG. 2 shows a second embodiment of a corrugated crimp package according to the present invention.

This package also uses, as a paper material, a single-faced corrugated cardboard 1 in which a liner is stuck to one side of a corrugated corrugated corrugated medium, and the corrugated corrugated medium is faced to each other, and an object to be packaged, such as a book, is used. The product is sandwiched between two single-faced cardboards 1, and the single-faced cardboards 1 are crimped at the

edges

2 and 3 along the two sides facing each other to form an envelope shape. Both the edge 2 along the opposite side and the edge 3 along the other opposite side are corrugated.

(Third embodiment)
FIG. 3 shows a third embodiment of a corrugated crimp package according to the invention.

This package also uses, as a paper material, a single-faced corrugated board 1 in which a liner is adhered to one side of a corrugated corrugated corrugated board. It is folded in half along a curved line 4, the middles of which are faced to each other, and an article to be packaged, such as a book, is sandwiched between the opposing single-faced cardboards 1, and the single-faced cardboards 1 are perpendicular to the folding line 4. The edge 2 along two opposite sides of the envelope is crimped, and the edge 3 along one side opposite to the folding line 4 is crimped by flat adhesion.

<Crimp processing>
(crimping device)
FIG. 4 illustrates a crimping device for forming the package of the first embodiment among the packages described above. This crimping device has a lower board 11 and an upper board 12, and the lower board 11 and the upper board 12 move up and down to contact and separate from each other. Two single-faced corrugated cardboards 1 arranged in the vertical direction are sent between the lower board 11 and the upper board 12, and the goods to be packaged G are conveyed between the lower board 11 and the upper board 12 by a conveyor. be done.

The lower board 11 and the upper board 12 are provided with a pressing member 13 for corrugated bonding and a pressing member 14 for flat bonding forming a right angle with respect to the upper and lower sides, respectively. As the board 12 approaches, pressure bonding is performed by the

pressing members

13 and 14 .

As shown in FIGS. 5 and 6, the pressing member 13 consists of a rigid mold body 13a having a wavy top surface and a mold body 13a. It is composed of a cushion layer 13b provided on the top surface and a low-friction layer 13c provided on the surface of the cushion layer 13b, and the low-friction layer 13c serves as a pressing surface. The cushion layer 13b prevents a phenomenon in which an excessive tensile force acts on the single-faced corrugated board 1 to cause surface cracks.

The pressing member 13 is made of a material such as monomer cast nylon or metal for the mold body 13a, sponge or rubber for the cushion layer 13b, and fluororesin obtained by applying a silicone-based adhesive to the back surface of a fluororesin-impregnated glass cloth for the low-friction layer 13c. Adhesive tapes and polyethylene-acrylic adhesive tapes having ridges extending in the direction of sliding on the surface can be used.

The static friction coefficient and dynamic friction coefficient of these tapes were measured. The average value was 0.08 and the dynamic friction coefficient was 0.03. Therefore, the static friction coefficient of the surface of the low-friction layer 13c shall be 0.1 or less.

7 and 8, the pressing member 13 does not have the cushion layer 13b and has a wavy top surface as shown in FIG. 7 and FIG. It may be composed of a main body 13a and a low-friction layer 13c provided on the top surface of the mold main body 13a, and the low-friction layer 13c may serve as a pressing surface. Also in this case, the low-friction layer 13c is essential. In the absence of the cushion layer 13b, a gap is ensured between the opposing pressing surfaces even when the lower board 11 and the upper board 12 are closest to each other so that the pressing surfaces of the low friction layer 13c do not interfere with each other.

The pressing member 14 is a flat bar having a flat pressing surface. A blade member 15 is provided.

A glue gun 16 for spraying and applying an adhesive to the bonding surface of the single-faced cardboard 1 is arranged upstream of the lower board 11 and the upper board 12 in the conveying direction of the single-faced cardboard 1 and the product G. Examples of adhesives used here include vinyl acetate emulsion adhesives.

(Crimping process)
In order to form the package of the first embodiment using the crimping device as described above, as shown in FIG. , the adhesive is sprayed from a glue gun 16 to the center side of the edge 2 of the single-faced cardboard 1, and the pressing surfaces of the pressing members 14 facing each other vertically are coated in a state in which the lower board 11 and the upper board 12 are separated from each other. After passing through, two single-faced corrugated cardboards 1 are sent between the wavy pressing surfaces of the pressing member 13, and the product G is sandwiched between the two single-faced corrugated cardboards 1.例文帳に追加

Then, as shown in FIG. 5 or 7, when two single-faced corrugated boards 1 are conveyed and the lower board 11 and the upper board 12 are brought close to each other, they are pressed by the opposing pressing members 13 to form two single-faced corrugated boards. The edges 2 on both sides of the corrugated cardboard 1 are wave-bonded, and at the same time, the edge 3 on the other side is pressed by the opposing pressing members 14 to be flat-bonded.

Also, the cutting blade member 15 that moves up and down cuts the overlapping single-faced cardboard 1 so as to separate the front and back packages that are continuously formed in the conveying direction.

After that, as shown in FIG. 6 or FIG. 8, the lower board 11 and the upper board 12 are separated, and the formed package is taken out from the crimping device. As shown in FIG. 1A, the package removed from the crimping device is corrugated at the edge 2 along one of the two sets of opposing sides of the single-faced corrugated cardboard 1, and the other opposing side is corrugated. The edge 3 along the edge is flat-type bonded. The method of closing the edge portion 3 is not limited to flat adhesion using an adhesive, and any method that can seal the opening may be used, such as adhesive tape, staples, or binding by pinching at the binding portion.

In this package, as shown in FIG. 1B, the length _L1 of the portion excluding the bonding margin a on both sides of the single-faced corrugated board 1 bent by the sandwiching of the product G, and the edge 2 in that direction are virtually flattened. The dimensional difference from the length (virtual straight-line distance) _L2 of the flat type bonding when bonded to the flat type is absorbed by the corrugated bonding, and the gap between the two single-faced corrugated cardboards 1 at the edge 2 is eliminated. be.

<Effect of corrugated adhesion>
In the corrugated crimp package as described above, when the two single-faced corrugated cardboards 1 sandwiching the product to be packaged are crimped at the edges along each side of the periphery, the single-faced corrugated cardboard 1 has a small elongation. Even if the paper material is used, the surplus dimension of the edge part due to the bending of the single-faced corrugated board 1 is absorbed by the corrugated adhesion, and the gap caused by the wrinkle is eliminated, so that the product can be protected from the intrusion of dust and foreign matter. The appearance of the bonded part is improved, and the reliability of the packaging quality is increased.

In addition, since the pressing surface of the pressing member 13 provided in the crimping device is provided with a low-friction layer, cracking of the surface layer of the single-faced corrugated cardboard 1 due to corrugated bonding is prevented, and packaging quality is improved.

<Others>
In the description of the crimping process, the case of forming the package of the first embodiment was exemplified. The arrangement of 13 and 14 and the method of supplying the single-faced cardboard 1 may be changed as appropriate.

In addition, in the above embodiment, a single-faced corrugated cardboard package and a crimping device for crimping the package were exemplified, but the present invention can also be applied to paper materials other than single-faced corrugated board. For example, it is possible to prevent gaps from occurring at the edges even in a package in which the item to be packaged is sandwiched between two single-layer paperboards.

<Specific examples and evaluation of corrugated adhesion>
FIG. 11 shows the stipulated names of the dimensional relationship of each part in the package for evaluating a specific example of corrugated adhesion. Here, the length of the single-faced corrugated cardboard bent due to the sandwiching of the product is indicated by a thick solid line. The length of the real or virtual edge flat bond is indicated by the thin dashed line, and the length of the edge wave bond is indicated by the thick dashed line. Also, the width dimension of the margin of adhesion perpendicular to the edges to be flat-type or wavy-bonded is indicated by "a" corresponding to FIG. 1B.

(Influence of corrugation parameters on adhesion and appearance)
Various packages were actually formed, and the effects of corrugation parameters (length, wave number, etc.) on adhesiveness and appearance were confirmed. Table 1 shows the results.
Here, the single-faced corrugated cardboard is E flute with a material composition of front liner: LC grade 120 g/m ² , middle liner: MC grade 115 g/m ² , and dimensions: width 300 mm×conveying direction 250 mm. Adhesion margin a is set to 8 mm.
The dimensions of the item to be packaged are width 197 mm x transport direction 160 mm x height 25 mm.
The corrugated shape is selected from those shown in Tables 2 and 3 and used.
The length of flat-type bonding (virtual straight-line distance) and the length of corrugated bonding in the table are calculated values, and jigs are manufactured and evaluated using these numerical values.

In the range of Table 1, the adhesion was good regardless of the length and fraction of the corrugated bond.
When the length of corrugation < length of single-faced corrugated board - 2a, there is a tendency for wrinkles to occur easily, but since the wrinkles are slight, there is no problem.
A similar tendency was observed even when the material of the single-faced cardboard and the flute were changed. For example, a similar tendency was observed for a B flute having kraft paper of 50 g/m ² ×50 m ² and material composition of front liner: LC grade 120 g/m ² and medium: MC grade 115 g/m ² .

(Influence on moldable range due to difference between flat type bonding and wave type bonding)
In addition, we confirmed the moldable range due to the difference in pressure bonding shape between flat type bonding and wave type bonding using adhesive. Table 4 shows the results.
Here, the single-faced corrugated cardboard is E flute with a material composition of front liner: LC grade 120 g/m ² , middle liner: MC grade 115 g/m ² , and dimensions: width 300 mm×conveying direction 250 mm.
The dimension of the packaged item is fixed at 197 mm in width, and various dimensions in the conveying direction and height are verified as shown in Table 4.
As for the corrugated shape, the number of peaks is 3, and d (length of corrugated bond-length of flat bond) is 4 mm.

When the pressing member is a flat type, sufficient adhesiveness can be obtained if the height of the product is 15 mm or less (Δ1.5 mm or less). When the product height is 20 mm or more (Δ2.8 mm or more), voids are generated.
When the pressing member has a corrugated shape, bonding becomes impossible when Δ−d≧2.8 mm, but the moldable range is wider than that of the flat type.

(Assumed parameter range)
Based on this knowledge, under the conditions of the size and material of the actually formed package, the wave number of wave bonding is set to a lower limit of 2 and an upper limit of 10, and the length of the wave is set to a lower limit. : length of single-faced cardboard -2a - 2.4mm, upper limit: length of single-faced cardboard -2a + 5.6mm, it was found that voids due to wrinkles at the edges can be eliminated.

1 Single-faced

cardboard

2, 3 Edge 4 Folding line 11 Lower board 12 Upper board 13 Pressing member 13a Mold main body 13b Cushion layer 13c Low friction layer 14 Pressing member 15 Cutting blade member 16 Glue gun

Claims

A packaging body formed by sandwiching an object to be packaged between paper materials arranged in the vertical direction and crimping the paper materials together at edges along each peripheral side,
The edge portions along at least two opposing sides of the paper material are wavy adhesive formed by pressure bonding so as to form a wavy shape in the thickness direction of the paper material,
The dimensional difference between the length of the portion of the paper material that is bent due to the sandwiching of the package and the length of the flat type adhesion (virtual linear distance) when the edge in that direction is virtually flatly adhered A corrugated pressure-bonded packaging body of paper material, characterized in that vertical gaps between the paper materials at the edges are eliminated by being absorbed by the corrugated bonding.
The corrugated pressure-bonded package of paper materials according to claim 1, characterized in that the paper materials arranged in the vertical direction consist of two sheets of paper materials having two sets of opposing sides.
Of the two sets of opposing sides of the two paper materials, the edge along one opposing side is the wave-shaped bond, and the edge along the other opposing side is the flat-type bonding. The corrugated pressure-bonded package of paper material according to claim 2, characterized in that:
The corrugated pressure-bonded package of paper materials according to claim 2, characterized in that the edges along all four sides of the two paper materials are corrugated.
The paper material arranged in the vertical direction is obtained by folding one sheet of paper material in two along a folding line, and the edges along two sides facing each other at right angles to the folding line are 2. The corrugated pressure-bonded package of paper materials according to claim 1, wherein corrugated bonding is used, and an edge portion along one side facing said folding line is crimped by said flat-type bonding.
2. The paper material according to claim 1, wherein the paper material is a single-faced corrugated cardboard in which a liner is attached to one side of corrugated corrugated corrugated corrugated corrugated corrugated corrugated corrugated corrugated corrugated board. Corrugated crimp packaging made of paper.
In the formation of the corrugated pressure-bonded package of paper materials according to claim 1, the edges of the paper materials arranged in the vertical direction are corrugated, so that the pressing surfaces for pinching the paper materials are formed in a corrugated shape. A corrugated pressing member characterized by:
According to a seventh aspect of the present invention, there is provided a wavy pressing member comprising a rigid mold body having a wavy top surface and a low-friction layer provided on the top surface of the mold body. A corrugated pressing member characterized by being a plane.
According to a seventh aspect of the present invention, there is provided a wavy pressing member comprising a rigid mold body having a wavy top surface, a cushion layer provided on the top surface of the mold body, and a bottom surface provided on the surface of the cushion layer. and a friction layer, wherein the low-friction layer serves as the pressing surface.
The corrugated pressing member according to claim 8 or 9 is provided so as to face the lower board and the upper board that move up and down, and the corrugated pressing member facing the lower board and the upper board are separated from each other. The paper materials arranged in the vertical direction are fed between the pressing surfaces of the two, and an object to be packaged is sandwiched between the paper materials. A crimping device, wherein the edge portion of the paper material is pressed by a pressing surface, and the edge portion of the paper material is corrugatedly bonded.