JPS64106Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 The present invention relates to a microwave oven container.

[Prior art]

Ekiben, catered lunches, etc. are items that are consumed in large quantities at one time, so it is necessary to prepare the contents in containers in advance, but if this is done, they may be cold by the time they reach the consumer.

In such a case, a warm bento box can be provided to the consumer by heating it in a microwave oven before handing it to the consumer.

However, the contents of bento boxes include some items that are better heated (such as cooked rice) and others that are better not heated (such as pickles), and these are often included in one bento. Therefore, heating a boxed lunch in a microwave ends up heating things that should not be heated, resulting in a loss of taste.

[Purpose of invention]

The purpose of this invention is to use a microwave container for containers such as lunch boxes, which is designed to heat only the foods that should be heated among the foods that are packed at the same time, and not to heat the foods that should not be heated. We aim to provide the following.

[Structure of the idea]

The present invention is a container for storing food to be heated in a microwave oven, in which at least a lid portion is made of synthetic resin, and a metal film is provided in a portion of the lid portion that should shield contents that are not desired to be heated. The metal film is divided into mutually discontinuous micro regions, each micro region has an area of 0.01 to 25 mm ² , and the gap between adjacent micro regions is 0.1 to 2 mm. .

[Embodiment]

Next, the present invention will be explained based on the drawings.

Fig. 1 is a perspective view showing an embodiment of the present invention applied to a disposable lunch box, and Fig. 2 is a sectional view of the lid (corresponding to the enlarged sectional view taken along the line X-X in Fig. 1). ).

The lunch box shown in Figures 1 and 2 includes a main body 1 and a lid 1.
It consists of 0. Inside the main body 1 is a partition wall 2,
According to step 3, place 4 where you put the cooked rice that you want to heat.
It is divided into a portion 5 for storing side foods that are desired to be heated and a portion 6 for storing side foods that are not desired to be heated. The lid part 10 is made of a synthetic resin molded product 11, and a metal vapor deposited film 13 is provided in a portion 12 (shaded area) corresponding to a portion 6 of the main body 1 into which side foods that are not desired to be heated are placed. A top coat layer 14 is provided thereon as a protective layer.

When the desired food is placed in parts 4, 5 and 6 of the main body 1 of the bento box, the lid is covered with the lid part 10, and this is placed in a microwave oven and irradiated with microwaves. The liquid passes through the lid 10 except for the portion 12 where the food is heated, and the food placed in the portions 4 and 2 of the main body 1 is heated. On the other hand, since the microwave is blocked in the portion 12 where the metal vapor deposited film 13 is present, the food placed in the portion 6 of the main body 1 is not heated.

In this way, in the lunch box according to the present invention,
Since only the foods that are desired to be heated are heated, and the foods that are not desired to be heated are not heated, both foods can be provided to consumers with good taste. Therefore, even for items such as ekiben and catered lunches, which are consumed in large quantities at once and must be prepared in advance by packing them with cooked food, it is recommended to heat them in a microwave oven before serving them to consumers. This has made it possible to provide delicious bento boxes.

As the metal film for blocking microwaves, a metal vapor deposited film, metal foil, etc. are used.

As the metal vapor deposition film, single metals such as aluminum, zinc, tin, copper, nickel, and chromium, or alloys of two or more thereof are used. Aluminum foil or the like is used as the metal foil.

The synthetic resin material for the lid portion 10 is not particularly limited as long as it does not easily deform when heated in a microwave oven, and examples thereof include polyester, polypropylene, polyethylene, and polycarbonate.

When using a metal evaporated film as the metal film, the metal evaporated film is partially formed on the continuous film or sheet of the synthetic resin, and then cut into a desired size using an appropriate forming method such as vacuum forming. What is necessary is just to shape|mold into a desired shape. Alternatively, a metal-deposited film may be cut to a desired size and laminated to the synthetic resin molded product.

When a metal foil is used as the metal film, it is usually bonded to the synthetic resin molded product.

Metals may cause sparks when heated in a microwave oven. In order to prevent this spark, it is desirable to divide the metal film into mutually discontinuous micro regions. In that case, the area of the micro region is
0.01~ ^25mm2 , especially about 0.01~ ^1mm2 ,
The gap between each micro region is approximately 0.1 to 2 mm.
For example, an etching method is used to divide the metal film into such minute regions. In the case of a metal vapor deposited film, a water soluble resin layer is formed on the vapor deposition substrate at the portions corresponding to the gaps in the minute regions, metal is vapor deposited on the entire surface, and then washed with water to form the water soluble resin layer and the above layer. It can be easily formed by dissolving and removing the deposited metal. A metal vapor-deposited film is preferable from the viewpoint that it is easy to form a metal film divided into minute regions.

The material of the main body 1 is not particularly limited, and examples include molded products of synthetic resin films or sheets (including foamed sheets, the same shall apply hereinafter), molded products of metal-deposited synthetic resin films or sheets, and metal foil laminated on synthetic resin films or sheets. Molded products etc. of molded products can be used as appropriate.

In a microwave oven, the irradiated microwaves are reflected from the bottom plate, so in order to also block these reflected waves, it is preferable to provide a metal film on at least the portion 6 of the main body 1 where heating is not desired. When a metal film is provided on the main body 1, it is also preferable to divide it into minute regions as described above. In the above description, the main body 1 and the lid part 10 are separate bodies, but they may be integrated via a hinge part.

The container of the present invention is not limited to the lunch box described above, but can also be suitably applied to other containers such as frozen foods.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the microwave oven container of the present invention, and FIG. 2 is a sectional view of the lid portion thereof (corresponding to an enlarged sectional view taken along the line X--X in FIG. 1). Main symbols in the drawings: 1: main body, 6: part for storing food not desired to be heated, 10: lid, 13: metal vapor deposited film.

Claims (1)

[Scope of utility model registration request] A container for storing food to be heated in a microwave oven, in which at least a lid portion is made of synthetic resin, and a metal film is provided at a portion of the lid portion that should shield contents that are not desired to be heated; A microwave oven container, wherein the membrane is divided into mutually discontinuous microregions, each of the microregions has an area of 0.01 to ^{25 mm2} , and the gap between adjacent microregions is 0.1 to 2mm.