JPH0885534A - Composite container - Google Patents

Abstract

PURPOSE: To absorb external impact and prevent contents from coming out by making a double structure comprising an inner container made of plastic with bellows provided on a body and a clamped part provided in the vicinity of an opening and an outer container made of paper with a curled part provided in the vicinity of the opening, wherein the inner and outer containers are adhered to each other. CONSTITUTION: This composite container has a double structure comprising an inner container 10 and an outer container 20 wherein the inner container 10 is put inside the outer container 20. The inner container 10 consists of an inner container body 11 and an inner container bottom 12, wherein circular bellows 13 are provided over an approximately entire face of the body 11 to be freely stretchable. In addition a clamped part 14 is formed in the vicinity of an opening of the body 11, wherein it is clamped with a curled part 23 provided in the vicinity of an opening of an outer container body 21 inside to be heat-fused, thereby constituting a double-structured composite container. With this composite container, if an impact is applied from outside, the bellows 13 stretch to absorb and buffer the impact so as to prevent the container from being damaged or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention takes into consideration the recent environmental problems after filling, distributing, selling and using liquid or viscous contents having relatively high specific gravity such as paint and offset ink. The present invention relates to a composite container composed of a paper container and a plastic container that can be separately disposed of.

[0002]

2. Description of the Related Art Conventional composite containers include, for example, Japanese Utility Model Laid-Open No. 59-168319 and Japanese Utility Model Laid-Open No. 59-13641.
There is a container disclosed in Japanese Patent No. In the former, the upper opening edge of a bottomed cup body made of plastic is wound outward to form a bead, and the upper edge portion of the outer cover body having a shape closely contacting with the outer surface of the cup body is formed into the bead and the cup. It is a composite container in which an outer cover is adhered to a cup body while being inserted between the outer wall of the body and the outer wall.

The latter is a composite container in which a blank plate is supplied to an injection molding die and the edges of the blank plate are joined together by an injection molding resin, with holes formed in the bottom piece of the blank plate. A composite container having a reduced pressure absorption plate mainly composed of a metal foil for covering the hole, wherein a peripheral edge portion of the reduced pressure absorption plate is wrapped with the injection molding resin.

None of these composite containers has a shock absorbing function when dropped. Therefore, when a liquid or viscous content having a relatively high specific gravity such as paint or offset ink is stored in the container and distributed,
When a shock such as dropping is applied, a phenomenon such as breakage of the container is likely to occur, and it has not yet been put into practical use.
Also, the contents with high specific gravity were stored in a paper-centered container (a cup container made of a laminated material in which a gas barrier material and a heat-sealable resin were combined in consideration of protection of the contents or storability) and dropped. In this case, there is a problem that the adhesion of the bottom portion cannot withstand the impact and peels off.

On the other hand, metal cans and plastic containers used for paint cans and offset ink cans have satisfactory contents protection during distribution, but have a difficulty in disposing of the containers after use.

[0006]

SUMMARY OF THE INVENTION The present invention is a paint,
The purpose of the present invention is to eliminate the above-mentioned problems relating to a container for containing a liquid or viscous content having a relatively high specific gravity such as offset ink, that is, having a shock absorbing function when dropped and being used. Easily separate and dispose of later containers,
The object is to provide a composite container that can be incinerated.

[0007]

In order to achieve the above object in the present invention, firstly, in the first invention, a bottomed cup-shaped inner container made of plastic and a cup-shaped outer container made of paper are provided. The inner container is provided with a bellows portion on its body, a winding fastening portion is provided near the opening, and a curl portion is provided near the opening of the outer container. It is a composite container characterized by having a double structure by adhering the inner surface of the winding tightening portion of the container.

According to the second aspect of the present invention, there is provided a cup-shaped inner container having a bottom made of plastic and a cup-shaped outer container made of paper. The inner container has a bellows portion on its body and a vicinity of the opening. Is provided with a winding tightening portion, and a curl portion is provided in the vicinity of the opening of the outer container, and the outer surface of the curl portion and the inner surface of the winding tightening portion of the inner container are bonded to form a double structure. The composite container characterized in that a space is provided between the bottom of the inner container and the bottom of the outer container.

[0009]

As described above, according to the present invention, since the body portion of the inner container is formed in a bellows shape, the bellows expands and contracts even if the container receives an impact such as a drop, so that the impact is absorbed. You can Further, since the inner container and the outer container are adhered only in the vicinity of the opening, the inner container and the outer container can be easily separated at the time of discarding.

Further, according to the second aspect of the present invention, since the space is provided between the bottom of the inner container and the bottom of the outer container, a composite container excellent in shock absorption can be obtained.

[0011]

The present invention will be described in detail with reference to the following examples.
As shown in FIG. 1, the composite container of the present invention comprises an inner container (10).
The outer container (20) and the outer container (20) have a double structure.
The inner container (10) is inserted inside 0). The inner container (10) includes an inner container body (11) and an inner container bottom (12).
The inner container body (11) has a ring-shaped bellows (13) over almost the entire surface, and has an expandable structure. Further, a curling portion (14) is formed in the vicinity of the opening of the inner container body (11) and is provided near the opening of the outer container body (21) of the outer container (20) described later. A double-structured composite container can be formed by winding (23) inside and tightening and adhering by heat fusion.

The material of the inner container (10) is not particularly limited as long as it can be molded by the sheet molding method or the blow molding method, but in consideration of the storage suitability of the contents, a gas barrier film is included. A multi-layered plastic sheet (for example, polypropylene / adhesive / saponified ethylene-vinyl acetate copolymer / adhesive / polypropylene) is most suitable. Also, as the gas barrier film,
Besides, it is possible to use an aluminum vapor deposition film, a SiO ₂ vapor deposition film, an aluminum foil or the like.

The outer container (20) comprises an outer container body (21),
Consists of an outer container bottom (22) and a curl (23),
As described above, the curl portion (23) provided in the vicinity of the opening of the inner container body portion (11) of the inner container (10) is wound with the curl portion (23) inside, and bonded by heat fusion to form a double structure composite. Forming a container. Further, the inner container bottom (12) of the inner container (10) and the outer container bottom (22) of the outer container (20).
A space (30) is formed between them.

The outer container (20) is a cup-shaped container and can be formed in the same manner as an ordinary paper cup. Further, the material may be any paper that can be formed by an ordinary paper cup molding machine, but since it needs a light-shielding property, an aluminum foil laminated is most suitable.

The lid member is not particularly limited, and a heat-sealable resin simple substance, a laminate of a heat-sealable resin and a base material, or the like can be used. In this case, paper or plastic film can be used. Further, an aluminum foil, an aluminum vapor deposition film, a SiO ₂ vapor deposition film, an ethylene-vinyl acetate copolymer saponification film or the like may be laminated in order to impart gas barrier properties and the like. The lid member is heat-sealed to seal the upper end of the opening of the inner container (10).

The composite container according to the present invention thus formed contains an appropriate amount of offset ink, and the opening is sealed by a lid member made of a multilayer plastic sheet made of the same material as the inner container (10) for circulation. Although shocked, the bellows part of the inner container body (11) of the inner container (10) expands and contracts to absorb the load due to the weight of the contents, and even if the container is deformed, it will be damaged. It never came.

[0017]

As described above, according to the present invention, the inner container is provided with the annular bellows portion so as to be expandable and contractible so as to absorb the impact from the outside. Even if it is not damaged, the contents will not pop out. Also,
Since the inner container and the outer container are bonded only near the opening, the inner container and the outer container can be easily separated when discarding,
It can be disposed of separately on paper and plastic. Therefore, even when compared with metal cans, plastic cans, etc., they are remarkably superior in terms of disposal.

Further, according to the second aspect of the present invention, since it is a composite container having a high impact absorbing property, the protection of the contained items is good. That is, since a space is provided between the bottom of the inner container and the bottom of the outer container, even if the inner container does not come into contact with the outer container when the container falls, even if the container is deformed to some extent, it is damaged. There is nothing to do. In particular, when a gas barrier property is required for a stored item, the outer container is not damaged, so that the gas barrier property is not deteriorated and the storage property of the stored item is good.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing an embodiment of the present invention.

[Explanation of symbols]

 10 Inner container 11 Inner container body 12 Inner container bottom 13 Bellows part 14 Wrapping part 20 Outer container 21 Outer container body 22 Outer container bottom 23 Curl section 30 ... Space section

Claims (2)

[Claims] 1. A bottomed cup-shaped inner container made of plastic,
A cup-shaped outer container made of paper, the inner container is provided with a bellows part on its body, a winding tightening part is provided near the opening, and a curl part is provided near the opening of the outer container. A composite container, which is provided and has a double structure by adhering the outer surface of the curl portion and the inner surface of the winding tightening portion of the inner container. 2. The composite container according to claim 1, wherein a space is provided between the bottom of the inner container and the bottom of the outer container.