JPH0542009Y2 - - Google Patents

Description

[Detailed explanation of the invention] Industrial application field This invention is applicable to dessert foods such as jelly and pudding, cooked foods such as cooked gratin, etc.
It relates to containers used for packaging and storing medical products, cosmetics, etc.

In this specification, the term "iron foil" includes both electrolytic iron foil manufactured by electrodeposition from an electrolytic solution containing iron and rolled steel foil manufactured by cold rolling a steel plate. .

Conventional technology and its problems Conventionally, containers made of aluminum foil coated with resin or laminated with plastic film have been widely used as containers for packaging and storing foods, etc., for reasons such as being lightweight and having a beautiful appearance. .

However, these containers are vulnerable to shocks such as being dropped, and if they are accidentally dropped, especially when they are filled with contents, the weight of the contents will often add to the container and cause it to dent. There was a problem in that the commercial value of the contents was significantly reduced due to the deformation of the container.

The purpose of this invention is to provide a container for foods, etc., which is free from deformation due to impact such as dropping.

Means for Solving Problems In the food container according to this invention, the container body is made of a laminated material comprising iron foil and aluminum foil laminated on at least the outside of the container body of both sides of the iron foil. It is characterized by

Here, the container is composed of a container body and a lid, and may be sealed by heat sealing or the like, or may be composed of only the container body.

The iron foil used is, for example, rolled steel foil with excellent formability, and preferably has a thickness of 20 to 100 μm.
If it is less than 20 μm, it will not have sufficient strength as a container.
This is because if it exceeds 100 μm, the surface of the container after molding will not be smooth, and if a flange is formed on the container, wrinkles will occur in the flange. Considering the cost aspect, a more preferable thickness is 30 to 70 μm.

Further, the aluminum foil preferably has a thickness of 10 to 100 μm. If it is less than 10 μm, it is easy to tear and difficult to handle when pasting it to reinforcing steel.
This is because if the thickness exceeds 100 μm, the moldability will be poor and the cost will be high. More preferred thickness is 30-70μm
It is.

The aluminum foil is laminated on both sides of the iron foil or on the surface of the iron foil on the outside of the container body directly or via an adhesive or the like.

The laminating agent may be one mainly composed of iron foil and aluminum foil, further laminated with a heat-sealable plastic film, or coated with a surface protection coating.

EXAMPLES AND COMPARATIVE EXAMPLES Example 1 One example of this invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a container for sealed packaging of dessert food according to this invention, and the bottom wall portion 2 has a circular planar shape.
A container main body 5 consisting of a substantially vertical peripheral wall 3 connected to this, a horizontal heat-sealing flange 4 connected to this, and a circular sealing lid made of aluminum foil laminated with a heat-sealable plastic film (not shown). (omitted).

The container body 5 has a maximum diameter of 65 mm and a depth of 30 mm, and is made of a laminated material 6 as shown in FIG. That is, in the laminated material 6, an unstretched polypropylene film 9 with a thickness of 50 μm is bonded to the surface of a rolled iron foil 7 with a thickness of 50 μm that is to become the inside of the container via a urethane adhesive 8, and the other side of the rolled iron foil 7 is An aluminum foil 11 with a thickness of 50 μm is bonded to the surface of the aluminum foil 11 via a heated and melted low-density polyethylene film 10, and an acrylic resin is further applied to the surface of the aluminum foil 11 that is to become the outside of the container to reduce the thickness.
A corrosion-resistant coating layer 12 of 5 μm is provided.

The container body 5 is made by punching out the laminated material 6 into a circular shape and then deep drawing it so that the corrosion-resistant coating layer 12 is on the outside.

In order to check the impact resistance of the container body 5 obtained in this way, hold the container body 5 in your hand,
When the container body 5 was allowed to fall naturally from a height of 120 cm above the floor with the bottom wall 2 in a horizontal position, no deformation was observed in the container body 5.

Example 2 A container for sealed packaging of dessert food, which is another example of this invention, is composed of a container body and a lid having the same shape and size as Example 1, although not shown.

As shown in FIG. 3, the laminated materials 16 constituting this container body are arranged in order from the side that should become the inside of the container.
unstretched polypropylene film 9 with a thickness of 50 μm,
It consists of an aluminum foil 11 with a thickness of 25 μm, 8 layers of urethane adhesive, rolled steel foil 7 with a thickness of 50 μm, 8 layers of urethane adhesive, an aluminum foil 11 with a thickness of 25 μm, and a corrosion-resistant coating layer 12 with a thickness of 5 μm. There is.

In order to confirm the impact resistance of this container body, a natural drop test was conducted under the same conditions as in Example 1, and no deformation was observed in the container body.

Comparative Example A container for sealed packaging of dessert food having the same shape and size as the above two examples was made from the following laminating agent.

That is, this laminated material consists of, in order from the side that should become the inside of the container, an unstretched polypropylene film with a thickness of 50 μm, a urethane adhesive layer with the same thickness as in each example, an aluminum foil with a thickness of 100 μm, and a layer with a thickness of 5 μm. It consists of a corrosion-resistant coating layer, and the thickness of the metal foil is the same as those in the two examples (100 μm).
It is something.

When the main body of the packaging container made of this laminated material was allowed to fall naturally under the same conditions as in each example, a dent was caused by the impact at the corner formed by the lower wall and the peripheral wall.

Effects of the invention In the food container of this invention, the container body is made of a laminated material comprising iron foil and aluminum foil laminated on at least the outer surface of the iron foil. It is something. Therefore, according to this idea, the appearance from the outside is as beautiful as a conventional container due to the aluminum foil, and the iron foil, which has excellent strength and toughness, is extremely resistant to shocks such as drops, and is better than the conventional container. There is no problem in that the commercial value of the contents is significantly reduced due to deformation of the container due to impact.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a container of Example 1 of this invention, and FIG. 2 is an enlarged sectional view showing a laminated material constituting the container. FIG. 3 is an enlarged cross-sectional view showing the laminated material constituting the container of Example 2 of this invention. 5... Container body, 6, 16... Laminated material, 7...
Iron foil, 11...aluminum foil.

Claims (1)

[Scope of utility model registration request] The container body 5 is a laminated material 6,1 comprising a steel foil 7 and an aluminum foil 11 laminated on at least the surface that should be the outside of the container body 5 out of both sides of the iron foil 7.
A container for food, etc. consisting of 6 parts.