JPH0457765A - Plastic made container - Google Patents

Abstract

PURPOSE:To provide the subject container with the combined functions to retain the freshness of its contents and the shape of the container by a method wherein the interior of a composite container consisting of a transparent plastic body part and metal lids is made vacuous and the container is filled with a chemical having a carbon dioxide producible function. CONSTITUTION:A plastic container consisting of a transparent plastic body part l and metal lids 2 and 3 is maintained under vacuum and filled with a chemical 12 having a carbon dioxide producible function. This improves the conservability of the contents and, since the chemical 12 absorbs the oxygen contained in the contents and produces carbon dioxide, the freshness of the contents is retained. On the other hand, since the carbon dioxide functions as a shape retaining agent for the container, the conteiner is prevented from being deformed, particularly from becoming dented in the transparent plastic body part l.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to plastic containers applied to, for example, dry packs and bags for juice and general foods, and more specifically, to plastic containers having a transparent plastic body and a metal lid. It relates to a composite container consisting of.

[Prior Art] Conventionally, canned goods have been used as containers for storing contents for a long period of time by creating a vacuum inside the container.

However, since the entire can is made of metal such as tin, the contents cannot be visually recognized from the outside.

Generally, it is often convenient if the contents can be confirmed with the naked eye.

In response to such demand, composite containers have recently been developed in which only the body is made of transparent plastic such as polyester and the lid is made of metal. (Unexamined Japanese Patent Publication 1986-
(See Publication No. 235047) [Problems to be Solved by the Invention] However, in the above composite container, the food (contents) is
In connection with creating a vacuum inside for the purpose of preventing sensitivity, there is a drawback that the plastic body tends to be deformed, such as denting.

Even if the container is deformed in this way, there is no practical problem, but there are problems in that the appearance of the container is poor (and the commercial value is reduced).

The present invention has been made in view of the above-mentioned problems of the conventional technology, and an object of the present invention is to provide a plastic container that has both the function of preserving the freshness of the contents and the function of preserving the shape of the container. .

[Means for Solving the Problems 1] In order to achieve the above object, the plastic container of the present invention is a composite container consisting of a transparent plastic body and a metal lid, and the inside of the container is evacuated and oxygen is removed. It is characterized by being filled with a drug that has the ability to generate carbon dioxide gas for absorption and shape retention.

[Operation] The inside of the container in which the contents are sealed is kept under vacuum in order to improve the preservation of the contents.

The inside of the container is filled with a carbon dioxide gas-generating oxygen absorber, which absorbs oxygen contained in the contents and generates carbon dioxide. Freshness is maintained by preventing oxygen-induced deterioration.

On the other hand, since the carbon dioxide gas functions as a shape preservation agent for the container, deformation of the container, especially deformation such as denting of the body made of transparent plastic or ink, is prevented.

[Examples] Examples of the present invention will be described below with reference to the drawings.

In FIG. 1 showing a plastic container according to the present invention, 1 is a transparent plastic body, and 2.3 is a metal lid.

That is, the canopy 2 is made of aluminum, and the seat 3 is made of tin.

The body portion 1 is made of plastic that has excellent transparency, gas (including water vapor) barrier properties, moldability, and mechanical properties.

Specifically, an ethylene/vinyl alcohol copolymer film (biaxially stretched EVAL film rEF-XLJ manufactured by Kuraray) is used.

Incidentally, this ethylene/vinyl alcohol copolymer film alone may be used, or a laminated film in which a polyester film or the like is polymerized and adhered to one or both sides thereof may be used.

The body portion 1 is formed by winding the film into a cylindrical shape, overlapping both ends over a required width, and heat-welding the overlapping portions by known means.

The joint portion 4 between the upper and lower ends of the body portion 1, the canopy 2 and the seat 3 has a double-sealed structure as shown in FIG.

That is, the structure of the joint part 4 is as shown in FIG. 2, where the body part 1 has a hook 5 bent downward from its open end. On the other hand, the canopy 2 has an upward hook 6 in the tightened state.
It also has an outer circumferential portion 7 on the outer circumferential side of the hook 6 and a counter sink portion 8 on the inner side of the hook 6.

Thus, the hook 5 of the body part 1 is held between the hook 6 of the canopy 2 and the outer circumferential part 7, and the top part 9 of the body part 1 is engaged with the countersink part 8 of the canopy 2, and the countersink It is held between the portion 8 and the hook 6.

In addition, a gasket 1 is placed in the gap at the tip of each hook 5.6.
O111 is interposed.

After being double-sealed in this way, the body part 1, canopy 2, and seat 3 are sealed by heating and caulking by known means, and at the same time, the interior is sealed to improve the preservation of the contents. It will be kept in a vacuum. The means for keeping the inside of this container in a vacuum is the same as for canned goods.

Further, the inside of this container is filled with a drug 12 having functions of absorbing oxygen and generating carbon dioxide gas for shape retention.

As the chemical 12, a carbon dioxide gas generating type oxygen absorber is used, and this carbon dioxide gas generating type oxygen absorber absorbs oxygen contained in the contents etc. and generates carbon dioxide gas, and this carbon dioxide gas is released into the container. It functions as a shape preservation agent and a bactericidal agent.

The following are applicable to the carbon dioxide gas-generating oxygen scavenger and item 15 above: (1) Metals such as iron, or their lower oxides, ferrous iron such as ferrous sulfate, etc. salt, sulfite, ascorbic acid, catechol, butylated hydroxyanisole, boudot 7
The main ingredient is a reducing substance such as reducing sugar, which is typified by sugar, and the necessary reaction accelerator and carbonate or bicarbonate of an alkali or alkaline earth metal are added thereto.

(2) A mixture consisting of ascorbate, an alkali, and a necessary reaction catalyst 6 (3) A mixture of a known oxygen scavenger and a gas-adsorbing material such as zeolite that adsorbs carbon dioxide gas.

In this example, Ageless (manufactured by Mitsubishi Gas Chemical Co., Ltd.) and Vitalon GMF (manufactured by Toagosei Chemical Industry Co., Ltd.) were used.

[Effects of the Invention] Since the present invention 1 is configured as explained above,
The medicine filled inside the container absorbs oxygen and generates carbon dioxide gas, which functions as a shape-preserving agent. ,
The body part will not be deformed such as denting, it can be maintained in its original shape, and the appearance design and commercial value can be enhanced. By doing so, the freshness of the contents can be maintained for a longer period of time.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a plastic container according to the present invention, and FIG. 2 is an enlarged sectional view showing a joint between a transparent plastic body and a metal lid of the same embodiment. Main symbols in the figure 1...Transparent plastic body part 2.3...Metal lid 12...Drug Figure 1

Claims (1)

[Scope of Claims] A composite container consisting of a transparent plastic body and a metal lid, in which the inside of the container is evacuated and filled with a chemical that has the function of absorbing oxygen and generating carbon dioxide gas for shape retention. Characteristic plastic container.