JPS5848121Y2 - foam plastic container - Google Patents

Description

[Detailed description of the invention] This invention relates to a container made of foamed plastic, and the entire structure is double-layered inside and outside in order to take full advantage of the respective advantages of a rigid or semi-rigid foamed polystyrene sheet and a soft foamed polyethylene sheet. It is.

Traditionally, flexible foamed plastic sheets have been unsuitable as materials for containers made of foamed plastic because they are unstable in shape retention; therefore, hard or semi-rigid foamed plastic sheets such as foamed polystyrene sheets have been used. used.

However, containers molded from the above-mentioned rigid or semi-rigid foamed plastic sheets have excellent heat insulation and cushioning properties, but are also highly rigid, and because the sheets are manufactured using an extrusion method, they are directional and prone to cracking or chipping. There were drawbacks.

Therefore, this invention eliminates the above drawbacks by molding a container that is not only made of a rigid or semi-rigid foamed polyethylene sheet, but also uses a soft foamed polyethylene sheet to form a container that is entirely made up of an inner and outer layer. The embodiment is described below with reference to the drawings.

Reference numeral 1 denotes a container molded from a foamed plastic sheet, and the entire container is molded with an inner and outer layer, of which the outer side 1a of the container 1 is made of a rigid or semi-rigid foamed BOSS styrene sheet, and the inner side 1b of the container 1 is made of a soft foamed styrene sheet. The container 1 is made of a foamed polyethylene sheet, and the shape of the container 1 is not limited to the illustrated one.

In addition, in cases where the container is molded from a foamed plastic sheet and has an inner and outer double layer, there are cases in which the inner and outer foamed plastics are bonded to each other by heat fusion, and cases in which they are bonded by adhesive. In the case of adhesive bonding, foamed polystyrene is easily attacked by solvent-based adhesives, so it is preferable to use adhesives such as ethylene vinyl acetate. This is done at the sheet stage before it is formed.

As described above, this invention is a container 1 molded from a foamed plastic sheet. Since it is made of polyethylene sheet, the inner side 1b that comes into contact with the contents is very soft and supple, making the contact with the contents soft,
Provides some cushioning properties.

In particular, this flexible inner side 1b joined to the outer side 1a can prevent the outer side 1a from cracking or chipping.
This advantage is extremely helpful in strengthening the overall container.

In addition, the outer side 1a of the container compensates for the lack of stability of the soft inner side 1b in maintaining the shape of the container as a whole, and as a stiff foamed plastic part, it helps keep the container shape safe, and also has insulation and cushioning properties. In particular, the cushioning effect is different from that of the inner side 1b, and can exhibit a cushioning effect rich in stiff shock absorption.

Therefore, the foamed plastic container invented by this invention has a hard and soft double layer on the outside and inside, and can exhibit a unique two-stage cushioning effect, has excellent shape retention, and is free from cracks and chips throughout the container. The hard and soft materials complement each other, and can be used in a wide variety of containers with different shapes and sizes. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a perspective view, FIG. 2 is a cross-sectional view taken along line 1--2, and FIG. 3 is a perspective view of containers of different shapes. 1...Container, 1a...Hard outside, 1
b... Soft inside.

Claims (1)

[Scope of utility model registration request] In containers molded from foamed plastic sheets,
A foamed plastic container characterized in that the entire container is molded into an inner and outer double layer, the outside of the container being made of a rigid or semi-rigid foamed polystyrene sheet, and the inside of the container being made of a soft foamed polyethylene sheet.