JPS62122974A - Vessel for packaging - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a packaging container that stores foods and the like and can be cooked in a microwave oven.

[Conventional technology and its problems]

BACKGROUND ART Conventionally, there are instant foods in which curry, stew, etc. are filled into a plastic container body, and a lid material is adhered to the container body by heat sealing to seal the container.

Incidentally, the lid material used for this type of packaging is often formed of a laminated material containing a metal thin film layer such as aluminum foil in order to improve barrier properties.

However, when heating the contents of curry, stew, etc. in a microwave oven, the metal thin film layer on one layer of the laminated material that forms the lid blocks electromagnetic waves, so the lid must be completely removed from the container body. After that, it was necessary to cover the opening of the container body with plastic wrap, etc.

Therefore, an object of the present invention is to provide a packaging container in which only the metal thin film layer of the lid material can be removed and can be used for cooking as is, in order to save the above-mentioned labor. .

[Means for achieving the purpose]

In order to achieve the above object, the present invention provides a gas barrier comprising a metal thin film layer on the outer surface of a synthetic resin base material whose inner surface can be heat-sealed via an adhesive layer and a resin layer having a weaker adhesive strength than the adhesive layer. Laminate the layers and manually remove the gas barrier layer from the base material! To provide a packaging container, which is a container in which a lid material that can be separated by 11 times is heat-sealed to an opening flange of a container body, and the heat-sealed portion is provided with a half cut that reaches at least the base material of the lid material. It is something to do.

[Effect]

Since the heat-sealed portion of the lid material is provided with a half cut, by bending and widening the cut, the metal thin film layer partially peels off at the end face of the cut, and this metal thin film layer has a weak adhesive strength. Since it is laminated with the base material through a weak resin layer, it can be easily peeled off by hand. When this is removed, the lid material and container body made of synthetic resin remain, and since these do not reflect microwaves, they can be used as is for electrons. Can be cooked in the microwave.

〔Example〕

First, the structure of the lid material will be explained.

As shown in FIG. 1, the lid material 1 includes a heat sealing layer 3 on the inner surface of a synthetic resin base material 2, and a resin layer 4 with relatively weak adhesive strength on the outer surface.
A thin metal film N6 such as a metal foil or a metal-deposited film is laminated via an adhesive layer 5. It should be noted that the outer surface of the metal thin film layer 6 has surface retention. [7] It is preferable to provide this layer 7. This layer 7 is formed by coating with a synthetic resin or bonding a synthetic resin film. It is also possible to provide a printed layer on the outer surface of the layer 6.

The base material 2 includes polyester, nylon (trade name),
Polypropylene and the like are suitable, and either a single substance or a composite thereof may be used. As the heat sealing layer 3, polyolefin, ethylene-vinyl acetate copolymer, etc. are used. Note that if the base material 2 itself has heat sealability, this layer 3 can be omitted.

The resin layer 4 is made of a material having relatively low adhesive strength, such as vinyl resin, urethane resin, acrylic resin, polyamide resin,
It is made of a single substance or a mixture of silicone resin, etc., and is formed by bart coating of this resin. Examples of the patterns are shown in Fig. 3 (A), (It), and (8).
As shown in Figure 2, the uncoated areas should form a pattern such as dots, lines, or grids. This resin layer 4 is
Contrary to the figure, it may be provided on the metal thin film layer 6, or in some cases, it may be applied over the entire surface.

As shown in FIG. 2, a reinforcement N6' can be provided on the inner surface of N6. This layer 6' is made of polyester, polypropylene, nylon, epoxy resin, etc.
It prevents corrosion of thin metal n'HJ6 during retort processing, and at the same time increases the thickness of the gas barrier layer.
It also helps facilitate peeling.

FIG. 4 shows a state in which the container body is sealed with the lid material 1 as described above.

As shown in the figure, the container body 10 has a bottom wall 11 and a peripheral wall 12 connected to the bottom wall 11, and a flange 13 at the peripheral edge of the opening.
is provided. The material of the container body 10 may be either a single substance or a composite material such as glass, ceramics, synthetic resin, or paper, as long as the upper surface of the flange 13 can be heat-sealed and is difficult to absorb microwaves. The shape is also round,
It may be of any shape, such as a rectangular shape.

When the lid material 1 is placed on the flange 13 of such a container body 10 and heat sealed, the container is completed.

Of course, the contents are sealed inside the main body 10.

A half cut 8 is made in the lid material 1 on the upper surface of the heat sealing part 14 of such a container. As shown in FIG. 4, this half cut 8 is a cut that reaches at least the base material 2, and cuts the thin metal 1111156 of the lid material 1 into I? 1Ij
This will give you a clue to what to do.

To use this container for cooking, first bend it so that it expands along the half-cut 8 shown in FIG.
Since layer 6 and base material 2 are slightly separated at the end face of the cut, N
6 can be picked up by hand. Taking that as a clue, N
6 on the surface! ? When pulled together, it is peeled off from the base material 2. Then you can put this container in the microwave and cook it.

In addition, when the reinforcing layer 6' is provided, it may be peeled off together with the metal thin film layer 6 by the above-mentioned procedure.

〔effect〕

As described above, the packaging container of the present invention has a lid material made of a laminate of a synthetic resin base (O) and a metal T! In addition, since the half-cut is provided so that the metal thin film layer can be easily peeled off, it can be used as is for cooking in a microwave oven by simply removing the metal thin film layer.

In other words, the packaging container of the present invention can be used throughout the process, from distribution to storage to cooking, so it is very convenient and time-saving to handle, and at the same time it is effective in saving resources. be.

[Brief explanation of drawings]

1 and 2 are cross-sectional views showing the lid material of the packaging container of the present invention, FIG. 3 is a plan view showing the intermittent resin layer pattern of the same, and FIG. 4 is a partially enlarged cross-sectional view of the container. It is. 1...Lid material, 2...Synthetic resin base material, 3
...Heat sealing layer, 4...Resin layer, 5...
...Adhesive layer, 6...Metal thin film layer, 6'.
...Reinforcement layer, 7...Surface protection layer, 8...
... Half cut, 10 ... Container body, 1
1...bottom wall, 12...peripheral wall, 13...
...7 lunge, 14...heat sealing part.

Claims (1)

[Claims] A gas barrier layer including a metal thin film layer is laminated on the outer surface of a synthetic resin base material whose inner surface can be heat-sealed via an adhesive layer and a resin layer with a weaker adhesive strength than the adhesive layer, and this gas barrier layer is made of synthetic resin. A packaging container in which a lid material that can be manually peeled off from a base material is heat-sealed to an opening flange of a container body, and the heat-sealed portion is provided with a half cut that reaches at least the base material of the lid material.