JP5286993B2 - Corner pad - Google Patents

Description

The present invention relates to a cushioning material for packaging, in particular, a corner pad for imparting a cushioning capacity to a corner of a rectangular parallelepiped package or packaging box, which is made of a plastic foam sheet.

Corrugated paper that is preferably used as a packaging box material is not so high in terms of cushioning performance. In order to accommodate the packaged item in the cardboard box, the buffered material is wrapped in a buffer packaging material, or a buffer material is applied to the outside of the cardboard box to reduce the buffering performance. As a cushioning material used for such a purpose, for example, a molded product of expanded polystyrene (EPS) is often used because of its high cushioning performance, but it is necessary to prepare a molding die designed for each application. Therefore, the cost is high unless mass production is carried out, and above all, the problem is that the burden on the environment due to disposal is large.

Recently, in order to alleviate the problems associated with the disposal of cushioning materials, corrugated paper has been processed and used more than once by punching it into a suitable shape. In addition to the major drawback of being weak, there is a problem in that paper dust is likely to be produced, and a shock-absorbing material having a large number of cut surfaces is particularly unsuitable for use as a shock-absorbing material for precision machines.

On the other hand, a plastic bubble sheet, which is also frequently used as a cushioning material for packaging, that is, a cap film formed by vacuum forming a plastic film to form a large number of cap-shaped protrusions, has a flat plastic surface at the bottom of the cap. A material obtained by laminating a back film (hereinafter referred to as “bubble sheet”) is advantageous in that it is resistant to water, does not generate paper dust, and gives a lighter load to the environment.
Values listed on the LCA-CO ₂ list (CO ₂ kg / kg):
EPS 3.01 Bubble sheet 1.24

A bubble sheet, particularly one having a generally used cap that is not so large (5 to 10 mm in diameter) is insufficient in cushioning capacity. Therefore, as one of the solutions to this problem, the applicant heat-processed a thick foam sheet repeatedly applied with a pressure-sensitive adhesive sheet on a flat surface, or a combination of heat-processing and cutting, Pads having various shapes suitable for buffering a rectangular parallelepiped or plate-like package such as a flat pad, a ridge pad, a square pad or a corner pad have been developed and have already been proposed (Patent Document 1).
JP 2003-292046 A

Although this buffer pad is a high-performance buffer material that can be widely used in various aspects, it requires some cost because it has undergone several stages of processing. However, in buffer packaging, in many cases, it has been experienced on a daily basis that it is sufficient if the buffering performance is slightly improved at the four corners of a rectangular parallelepiped package or box. It satisfies the need for such a relatively light buffering performance improvement, does not require high processing, and is therefore extremely advantageous in terms of cost, can be easily realized, and is easy to store and transport. There is a need for an auxiliary material for buffer packaging with reduced environmental impact.

The object of the present invention is to respond to the above-mentioned demand, use a bubble sheet that can be loaded to the environment as a material, can be realized with simple processing means, and has no trouble in storage and transportation, and It is an object of the present invention to provide a corner pad that can provide a cushioning capacity to a corner portion of a rectangular parallelepiped, which requires low cost.

The basic mode of the corner pad of the present invention is as shown in a developed view of FIG. A two-layer plastic foam sheet obtained by laminating a flat back film (2), or another plastic flat liner film (3) connected to the top of the cap of the two-layer plastic foam sheet Is used as a material, and is composed of a square area (4) located in the center and two areas (5A, 5A) of the same size extending from two adjacent sides. A sheet with an equilateral mountain shape is obtained by punching, and a double-sided adhesive tape (7, 7A, 7A) is applied to each square area. Release paper on their exposed surfaces (8, 8A, 8A) configuration loaded with a corner pad providing a buffering capacity by adhesive to the corners of the packaged articles or packaging box (I). FIG. 3 is an enlarged view of a part of the cross section in the II direction in FIG.

The modified embodiment of the corner pad according to the present invention is as follows. As shown in a development view in FIG. 2, the plastic film is flat on the bottom of the cap film (1) formed by vacuum forming a plastic sheet to form a large number of cap-shaped protrusions. A two-layer plastic bubble sheet made by laminating a back film (2), or another plastic flat liner film (3) connected to the top of the cap of the two-layer plastic bubble sheet A plastic foam sheet having a three-layer structure is used as a material, and it is composed of a square region (4) located in the center and two regions (5B, 5C) of approximately the same size extending from two adjacent sides. An approximately equilateral chevron-shaped sheet having a protruding piece (6) directed toward the inside of the chevron at the extended end of one region (5B) A double-sided adhesive tape (7, 7B, 7C) is affixed to each square area, and a double-sided adhesive tape (7A) is also affixed to the protruding piece (6), and a release paper is applied to the exposed surface. This is a corner pad (II) that has a configuration in which (8, 8A, 8B, 8C) is placed, and provides a cushioning capacity by adhering to the corners of the package or the packaging box.

The usage of the corner pad (I) in the basic mode shown in FIG. 1 is as follows. First, with respect to the upper surface (or the lower surface) of the corner of a rectangular parallelepiped object that is a packaged object or a packaging box, the square area (4) located in the center is just a corner with the two adjacent sides described above. It is placed so as to match the two sides constituting the part, the position is fixed with the double-sided adhesive tape (7), and then the remaining two regions (5A, 5A) of the same size are placed along the side surface of the rectangular parallelepiped object. Pasted with each double-sided adhesive tape (7A, 7A) and fixed.

Alternatively, place the corner pad (I) on a plane, and place a rectangular parallelepiped object over it so that its corners coincide with the square area (4) located at the center of the corner pad (I). After fixing the relationship between the two with the double-sided adhesive tape (7), the remaining two regions (5A, 5A) of the same size are placed along the side of the rectangular parallelepiped object, and the respective double-sided adhesive tapes (7A, 7A) You may follow the procedure of sticking and fixing by.

The usage method of the corner pad (II) in the modified mode shown in FIG. 2 is the same as the usage method of the corner pad (I) described above, the procedure for applying the corner pad (II) on the rectangular parallelepiped object, Two methods can be followed: a procedure of placing a rectangular parallelepiped object on the pad (II). In addition, as shown in FIG. 4, it is possible to apply a corner pad (II) so that a shape close to the corner of a rectangular parallelepiped object is taken in advance. At this time, it goes without saying that this shape should be taken by using the double-sided pressure-sensitive adhesive tape of the protruding piece (6) to join two regions (5B, 5C) of approximately the same size.

In some cases, a plurality of the corner pads of the present invention, particularly the corner pad (I), can be used. FIG. 5 shows an example of this. By attaching a double-sided adhesive tape (7, 7A), a number of sheets can be stacked as desired to provide the necessary buffering capacity, or a space suitable for buffering. It becomes possible to form.

The corner pads (I) and (II) of the present invention can give a cushioning capacity to the corners of a rectangular parallelepiped packaging box or packaged object with a simple operation. Since this corner pad is manufactured from a regular air bubble sheet, the used one can be recovered and the plastic can be reused. If it cannot be reused, it must be incinerated. The amount of plastic used is small, and the environmental impact of incineration is low. The production can be performed by a simple processing means such as punching and attaching a double-sided adhesive tape using a long bubble sheet as a material. Therefore, a special device such as a mold or a heating device necessary for manufacturing the EPS cushioning material is unnecessary. Since the manufactured corner pad is flat until use, it does not require any trouble in storage and transportation.

As described above, this corner pad can be manufactured at a low cost. In particular, if a long bubble sheet is punched in a pattern as shown in FIGS. 6 (I) and 7 (II). The material should be recommended continuously and without waste from a long bubble sheet.

The corner pad is always loaded during use as a cushioning material, and the air sealed in the cap tends to be pushed out of the cap through a plastic film under pressure. If the air in the cap escapes easily, the buffering capacity decreases, and the packaging box and the packaged item may be damaged by the impact during transportation. Therefore, although it depends on the required buffering capacity, particularly its sustainability, it is preferable to use a plastic with a high gas barrier property as the material of the bubble sheet. Such plastics include nylon and ethylene-vinyl alcohol copolymer resins, as is well known. If desired, a corner pad having functionality can be manufactured by using a plastic added with an auxiliary agent having a special function such as an antistatic agent or an antirust agent.

When a bubble sheet is used for cushioning packaging, what controls the cushioning capacity is generally the size and shape of the cap, and the larger the cap, the more dominant. Therefore, the foam sheet used as the material of the corner pad of the present invention is naturally different depending on the application, but usually, a cap having a diameter of 20 to 50 mm and a height of 6 to 20 mm is suitable. As for the shape, an ordinary cylindrical shape is suitable, but other than a prismatic shape, it may have a modified cross section.

As described above, the bubble sheet used as the material of the corner pad of the present invention may have either a cap + back two-layer structure or a cap + back + liner three-layer structure. However, as the cap becomes larger, the three-layer configuration has a problem of distortion at the bent portion, so it can be said that the two-layer configuration is easier to use. In the case where a two-layered bubble sheet is used, in the case where the cap faces the outside of the rectangular parallelepiped shape, the problem of collision between the caps does not occur in principle, which is appropriate. Such a difference occurs when a large cap having a cap diameter of 50 mm or more and a height of 25 mm or more is employed. Of course, in the aspect of using the cap facing outward, the double-sided pressure-sensitive adhesive tape (7) is pasted on the back sheet side.

The expanded view of the basic aspect (I) of the corner pad of this invention. The expanded view of the change aspect (II) of the corner pad of this invention. The figure which expanded a part of cross section of the II direction of FIG. The perspective view explaining another usage condition of a corner pad (II). The perspective view explaining another usage condition of a corner pad (I). The figure explaining the punching method which manufactures corner pad (I) economically from a long bubble sheet original fabric. The figure explaining the punching method which manufactures corner pad (II) economically from a long bubble sheet original fabric.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cap film 2 Back film 3 Liner film 4 Square area | region 5A located in the center Two areas 5B and 5C of the same size Two areas 6 of the same size Projection piece 7,7A, 7B, 7C Double-sided adhesive tape 8,8A , 8B, 8C Release paper

Claims (6)

A two-layer plastic bubble sheet in which a plastic flat back film (2) is bonded to the bottom of a cap film (1) formed by vacuum forming a plastic film to form a large number of cap-shaped protrusions, or A three-layer plastic bubble sheet formed by joining the top of the cap of the two-layer plastic bubble sheet and bonding another plastic flat liner film (3) as a material is located in the center. An equilateral mountain-shaped sheet comprising a square area (4) and two square extension areas (5A, 5A) of the same size extending from two adjacent sides thereof is obtained by punching, and these three square areas bonding the double-sided adhesive tape (7, 7A, 7A) each time, the release paper on their exposed surfaces (8, 8A, 8A) put the Ri, corner pads configured to provide buffering capacity by adhesive against the area of the package or Oite its three sides to the corners of the packaging box above three squares. A two-layer plastic bubble sheet in which a plastic flat back film (2) is bonded to the bottom of a cap film (1) formed by vacuum forming a plastic sheet to form a large number of cap-shaped protrusions, or A three-layer plastic bubble sheet formed by joining the top of the cap of the two-layer plastic bubble sheet and bonding another plastic flat liner film (3) as a material is located in the center. An approximately equilateral mountain-shaped sheet comprising a square area (4) and two square extension areas (5B, 5C) of approximately the same size extending from two adjacent sides, one extension area (5B) obtained by stamping projecting piece toward the inside of the mountain-shaped sheets provided with a (6) to the extended end of each area of these three squares , Double-sided adhesive tape (7,7B, 7C) with Stick, also attaching the double-sided adhesive tape (7A) to the projecting piece (6), release paper on their exposed surfaces (8,8B, 8C, 8A) was loaded Te becomes, on whether to adhere against the area of the package or packaging box Oite its three sides of the the corners three squares or the other of the projecting edge (6) of the extension region (5C) A corner pad configured to have a shape close to the corner in advance by adhering, and then give buffering capability by adhering to the three surfaces of the corner. The corner pad according to claim 1 or 2, wherein a plastic having a high gas barrier property is used as a material for the plastic foam sheet. The corner pad according to any one of claims 1 to 3, wherein the cap has a cylindrical shape having a diameter of 5 to 50 mm and a height of 1.5 to 25 mm. The cap has a structure in which a double-layered plastic foam sheet having a cylindrical shape with a diameter of 5 to 50 mm and a height of 1.5 to 25 mm is used, and a double-sided adhesive tape is pasted on the back sheet side. Or the corner pad in any one of Claims 1-3 which a cap faces outside when it is made to adhere to the corner | angular part of a packaging box. A buffer packaging method for providing a desired buffering capacity by stacking a plurality of the corner pads according to any one of claims 1 to 5 and adhering the corner pads to a corner of a package or a packaging box.

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