JPH07257662A - Packing body of food for microwave oven - Google Patents

Abstract

PURPOSE:To obtain a packing body of food which is easily handled and peeled off and which can be heated as it is, without a pretreatment to make a discharge hole of steam on cooking it in a microwave oven without danger of breaking the packing body. CONSTITUTION:In a plastic packing body in which the flange of a container body 1 is heat-sealed with a cover body, the heat-sealing part which is easily peeled off, is provided with a double seal composed of an inner seal 3 and an outer seal 4. Then a groove 5 or a non-seal part is provided between the inner seal and the outer seal and one or more discharge openings 6 of steam connected to the outside air are provided to connect to the groove 5 or the non-seal part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food package for microwave oven cooking which can be easily cooked in a microwave oven or the like.

[0002]

2. Description of the Related Art Recently, cooked frozen foods and retort foods are available on the market so that they can be easily cooked at home.
It can be eaten simply by heat treatment. When these foods are heat-treated, they are usually placed in hot water, or a steamer, a microwave oven or the like is used, but the simplest method is a microwave high-frequency cooking method. Generally, when heating food in a microwave oven, the food is put in tableware or wrapped with wrap film. On the other hand, conventionally, a package in which foods such as hamburgers are packed and sealed in a deep-drawn plastic film, or a package in which foods are sealed in a plastic container with a flange are distributed.
Since these packages are sealed so as to completely block the outside air, if they are put in a microwave oven and heated as they are, they will burst due to the pressure of water vapor generated from the food. Therefore, in this case, it is necessary to take out the food from the package or cut a part of the package with a knife or the like in advance to form a steam escape port and then perform the heat treatment. However, it is troublesome to take out food from the package or cut a part of the package beforehand with a knife etc. to make a steam escape port and then perform heat treatment, and heat treatment in a microwave oven without any pretreatment. It was desired to be able to do it. In order to solve these problems, a small hole for a vapor escape port is preliminarily formed in the package, and the package has a seal stuck through an adhesive whose adhesive strength is reduced by heat in the small hole. There has been proposed a method in which a part of the seal portion is set as a weak seal portion and is cleaved by vapor pressure to form a steam escape port. However, if a small hole is made in advance and a seal is attached to that part, there is a problem that the seal has a weak adhesive force, so it may peel off during the distribution process, etc. There is a problem that it is difficult to provide a seal portion.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a package which can be cooked in a microwave oven at a high frequency without forming a vapor escape port in the process of producing the package and without pretreatment such as making holes. Is to provide.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a plastic package formed by heat-sealing a flange portion of a container body and a lid body, wherein a heat-sealing portion having an easy peeling property is used as an inner sealing portion. A double seal of the outer seal portion is provided, and a groove portion or a non-seal portion is provided between the inner seal portion and the outer seal portion, and at least one steam outlet connected to the outside air is connected to the groove portion or the non-seal portion. A food package for microwave oven cooking characterized by being provided. The configuration of the present invention will be described below with reference to FIGS. 1 and 2 showing one embodiment. The container body 1 has a flange portion, and a continuous groove portion 5 is provided in the flange portion. The groove portion 5 has an inner seal portion 3 inside and an outer seal portion 4 outside. . Further, one or more vapor discharge ports 6 are provided so as to be connected to the outside air from the groove portion 5 toward the outside. The size of the groove 5 is not particularly limited as long as steam is discharged, and therefore the groove may be a non-sealed part which is not sealed. Then, in order to facilitate the cleavage of the inner seal portion by the vapor pressure and to require an appropriate seal strength, the seal width of the inner seal portion 3 is smaller than the seal width of the outer seal portion 4, and is preferably 1 to 3 mm. .

Here, the form of the plan view of the container body 1 may be any of a triangular shape, a quadrangular shape, an elliptical shape and a circular shape.
Also, the container body may be obtained by vacuum forming or pressure forming of a plastic film or sheet,
It may be obtained by injection molding. The plastic film used for the container body is polypropylene (P
Although it may be a single layer such as P), a multilayer film using a saponified ethylene-vinyl acetate copolymer (EVOH) having a good barrier property is suitable. For example PP / EVOH
/ PP, PP / KNy / EVA, PP / EVOH / Ny
/ PE, PP / Ny / EVOH / Ny / ION, Ny /
EVOH / LLDPE, Ny / EVOH / EVA, EV
A multilayer film such as OH / Ny / PE can be mentioned, and the layer on the right side is a sealant layer. Here, KNy represents vinylidene chloride-coated nylon, EVA represents ethylene-vinyl acetate copolymer, Ny represents nylon, and PE represents polyethylene. The lid body has at least a base material layer made of an aluminum foil, a plastic film such as PP or the like having excellent barrier properties and a sealant layer, and the sealant layer is easily peeled off when heat-sealed with the sealant layer of the container body. Must be something. To make the food package of the present invention using this container body 1, by filling the container body with food and heat-sealing the lid body to the inner seal portion and the outer seal portion of the flange portion of the container body at the same time. can get. When the package of the present invention is used, it is put in a microwave oven and cooked without being pretreated. When heated, the temperature rises, steam is generated from the food, the internal pressure of the package rises, and the lid in particular swells. When the internal pressure exceeds a certain level,
A part of the inner seal part is opened, steam is discharged from the steam outlet through the groove part, the package is not ruptured, the food is heated to an appropriate temperature, and the seal part is easy peel, so it can be easily opened. The stored food can be easily taken out, and the food contained in the package is eaten.

[0006]

According to the present invention, as described above, a groove portion or a non-seal portion is provided between the inner seal portion and the outer seal portion in the double seal portion of the inner seal portion and the outer seal portion of the package. Since it is a package that stores food with a steam outlet that connects the groove or non-sealed portion to the outside air, when cooking with a microwave oven, pretreatment such as opening a hole for the steam outlet, etc. It is possible to provide an easy-peel food package that can be heated as it is, without the risk of bursting the package, and easy to handle.

[Brief description of drawings]

FIG. 1 is a plan view of a container body used in the food package of the present invention,

FIG. 2 is a cross-sectional view of the food package of the present invention in which the lid is sealed to the cross-sectional view taken along the line XX in FIG.

Claims (1)

[Claims] 1. A plastic packaging body obtained by heat-sealing a flange portion of a container body and a lid body, wherein a heat-sealing portion having an easy peel property is a double seal of an inner sealing portion and an outer sealing portion. A groove portion or a non-sealing portion is provided between the inner sealing portion and the outer sealing portion, and a steam outlet connected to the outside air is connected to the groove portion or the non-sealing portion.
A food package for cooking in a microwave oven, characterized in that it is provided in more than one place.