JPS5925638Y2 - food containers - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to food containers.

With the development of petrochemistry, synthetic resins that can be easily molded have become available in large quantities at low prices, so synthetic resin products are now widely used in food containers, including disposable tableware.

However, food containers made of synthetic resin not only cause pollution due to disposal, but also have drawbacks such as not looking good or giving a cheap feeling.

In addition, there are methods of compensating for certain defects in containers of synthetic resin products by laminating them with metal, such as laminating them with metal foil or depositing metal on synthetic resin.
Metals can prevent gas from permeating, which is a disadvantage of synthetic resins, but they also have the disadvantage of being corroded by some foods.

The purpose of this invention is to utilize the inherent characteristics of synthetic resin products to overcome the various drawbacks of this type of food container, and to create a new food container that has a particularly good appearance and excellent acid resistance. There are containers to provide.

That is, the present invention consists of a transparent polystyrene resin sheet, a metal vapor deposited layer, and a polystyrene resin foam, and an adhesive layer is interposed between the metal vapor deposit layer and the polystyrene resin foam, and the adhesive The layer is composed of a mixture of polystyrene resin and ionomer, and the polystyrene resin sheet surface forms the inner surface of the container, and the polystyrene resin foam forms the outer surface of the container. The present invention relates to a food container characterized by:

In the present invention, the metal vapor-deposited layer and the transparent polystyrene-based resin sheet are used in a state in which they are integrated by vapor deposition in advance.

For example, aluminum is used as the metal.

In addition, the adhesive layer interposed between the metal vapor deposited layer and the polystyrene resin foam contains 70 to 50% by weight of polystyrene resin and 30 to 50% by weight of ionomer (ionic copolymer resin).
Particularly preferred are melt mixtures with % by weight.

In this invention, the polystyrene resin foam that forms the outer surface of the container has a hardness and heat retention of 0.05 to 0.5.
A density of g/- is preferred.

Although a bowl-shaped food container is illustrated in the drawing, large containers for transportation, or similar containers in the form of a cup or a plate may also be included.

FIG. 1 is a sectional view of a bowl-shaped container according to the present invention;
The figure is an enlarged view of part A in FIG. 1, and in the drawing, 1 indicates a transparent polystyrene resin sheet, 2 indicates a metal vapor deposited layer, 3 indicates a polystyrene resin foam, and 4 indicates an adhesive layer.

In the container of the present invention, a more luxurious image can be given by further providing a sheet or the like with a pattern formed thereon as desired on the outer surface.

The container of this invention has a transparent polystyrene resin sheet on the surface that comes into contact with the food, and since the metal surface does not come into direct contact with the food, there is no need to worry about corrosion. As a result, it has a beautiful appearance due to the luster of the metal, and also has a sense of volume.In addition, since the outer surface is made of polystyrene resin foam, it has various advantages such as cushioning properties and a good texture. It is something that you have.

Moreover, since there is an adhesive layer made of a mixture of polystyrene resin and ionomer between the metal vapor deposited layer and the polystyrene resin foam, the adhesion between the metal vapor deposition layer and the foam is strong. This has the effect that there is no risk of peeling.

[Brief explanation of the drawing]

FIG. 1: A cross-sectional view illustrating the food container of the present invention. Figure 2: Enlarged view of part of Figure 1A. 1... Transparent polystyrene resin sheet, 2... Metal vapor deposited layer,
3...Polystyrene resin foam, 4...
...Adhesive layer.

Claims (1)

[Scope of utility model registration request] Consisting of a transparent polystyrene resin sheet, a metal vapor deposited layer, and a polystyrene resin foam, an adhesive layer is interposed between the metal vapor deposited layer and the polystyrene resin foam,
A structure in which the adhesive layer is composed of a mixture of polystyrene resin and an ionomer, the polystyrene resin sheet surface forms the inner surface of the container, and the polystyrene resin foam forms the outer surface of the container. A food container characterized by: