JPH10278975A - Frozon-food storage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rupture of a container in advance by providing a part to be peeled off by the thermal contraction during the heating on at least one part of seal part to release the steam filled inside to the outer side without opening a hole before putting a packaged frozen food in a microwave oven. SOLUTION: A flange C1 ' is formed in a peripheral part of an opening of a cup-shaped container C1 , a packaged frozen food is stored, and a sealed part is formed by a top seal film T1 made of plastic. A small hole H1 of the dimension suitable for a vent is formed at least in one part of the top seal film T1 , and a label L1 made of the material which is larger in shrinkage by heat compared with the top seal film T1 , e.g. PET or PVC, is attached with the adhesive so as to cover the small hole 1. When the water content in the packaged frozen food is evaporated when heated in a microwave oven, and the internal pressure is increased and the temperature rises, the label L1 is automatically peeled, and the steam inside is discharged outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage container in which frozen food is hermetically sealed for heating and cooking in a microwave oven.

[0002]

2. Description of the Related Art Conventionally, in such a frozen food, if a container for a film for sealing is put in a microwave oven as it is, moisture in the container evaporates during heating, and the container is ruptured. In order to prevent this, it scatters inside the microwave oven.To prevent this, pierce the part of the storage container with a tip of a chopstick or a fork in advance and make a hole, and discharge the steam filled inside at the time of heating to rupture the bag. Prevention was being done.

[0003]

However, this method is not only troublesome and troublesome before cooking, but also unclean when using something other than chopsticks and forks.

In order to solve the above-mentioned problems, the present invention is to prevent the container from bursting by letting the vapor filled and expanded inside escape to the outside without making a hole before putting it in a microwave oven. It is an object of the present invention to provide a frozen food storage container that can be used.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a frozen food storage container according to the present invention is a storage container in which frozen food is sealed, and a main body is provided with a plastic sealing portion. The gist of the present invention is that at least one portion of the seal portion has a portion that peels off due to heat shrinkage during heating.

Further, as described in claim 2, the part to be peeled off has a heat shrinkage greater than that of the deaeration port opened in the seal part and the sealing film, and is adhered so as to close the deaeration port. It is desirable to include a label to be used.

Preferably, the vent hole is a small hole.

Preferably, the part to be peeled off includes a sheet which has a higher heat shrinkage than the seal part and overlaps and adheres to the seal part.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a flexible sheet film for a frozen food storage container for carrying out the present invention,
That is, a state in which the top seal film T is pulled out from the roll R formed of a normal plastic film is shown.

In the roll R, small holes H having a preferable size as a deaeration port are formed at predetermined intervals in a longitudinal direction at an appropriate place when the roll R is pulled out, and the small holes H are sequentially compared with the top seal film T. The material L having a higher heat shrinkage, such as a label L such as PET or PVC, is
To seal the top seal film T
To the adhesive.

Next, FIG. 2 shows a completed frozen food storage container. C1 is a bowl-shaped vessel as a whole, and a flange C1 'is formed around the opening, and frozen food (not shown) stored in the flange C' so as to be completely rubbed.
The above-mentioned plastic top seal film T
At the same time as forming the hermetic seal part in step 1, it is automatically cut as needed to complete.

When the thus-prepared frozen food storage container C1 is placed in a microwave oven and heated, the moisture of the frozen food inside evaporates and the internal pressure increases and the temperature also increases. Then, since the heat shrinkage of the label L1 affixed to the top seal film T1 with an adhesive is larger than that of the top seal film T1, the label L1
Cannot maintain the state of being adhered to the top seal film T1 and peels off, the internal vapor is discharged to the outside to reduce the internal pressure, so that the frozen food container itself can be prevented from exploding. it can.

The present invention is not limited to the above embodiment. For example, as shown in FIG. 3, the top seal film for sealing the container C2 uses a plastic film T2 at the center, and the both side edges are at the center. It may be formed by using a film T2 'made of a material having a higher heat shrinkage ratio than that of the part, such as PET or PVC, which is adhered with an adhesive or a pressure-sensitive adhesive in an overlapping state.

In the embodiment shown in FIG. 1, a small hole H is formed in the top seal film T1 and a label L1 is affixed thereon, but a cut M is formed instead of the small hole H1. May be performed.

In the embodiment shown in FIG. 5, the container C3 is a plastic bowl-shaped vessel as a whole, and a flange C'3 is formed near the opening.
A similar frusto lid T3 having # 3 is placed over and engaged. A small hole H3 is formed substantially at the center of the lid T3, and a label L3 is affixed with an adhesive or an adhesive. The label L3 has a higher heat shrinkage than the lid T3.

In each of the above embodiments, the container is formed by sealing a bowl-shaped main body with a top seal film. However, the present invention is not limited to this, and as shown in FIG. B is a vacuum bag in which a frozen portion is sealed by forming a sealing portion formed of a flexible and polyethylene film sheet having a bag shape. A degassing opening is formed on the surface of the vacuum bag, and a label L is affixed thereon. It may be something. In this case, the vent hole may be a small hole or a cut M as shown in the figure.

Although it is essential that the heat shrinkage of the label is higher than that of the seal portion through the above-described embodiment, the use of a soft material preferably results in efficient peeling.

In the embodiment of FIG. 2, 320 g of frozen crab pilaf is placed in a bowl-shaped container C. In a case where the container is put and sealed with a top seal film T, the label L is peeled off in 140 seconds when heated in a microwave oven and cooking is completed in 240 seconds.

The amount of frozen food inside is 130 g. When the curry fried rice is packed in a vacuum and heated in a microwave oven, the label L is broken in 100 seconds and the steam is discharged to the outside, and the cooking is completed in 200 seconds.

【The invention's effect】

As described above, the present invention relates to a storage container in which frozen food is sealed, in which the main body includes a plastic sealing portion, and at least one of the sealing portions has a portion which is peeled off by heat shrinkage when heated. There is no need to make holes by hand before placing in the microwave.

Further, since the part to be peeled off includes a deaeration port opened in the sealing film and a label which has a higher heat shrinkage than the sealing film and is adhered so as to close the deaeration port, Is very simple.

Further, since the deaeration port is a small hole, the internal vapor is discharged when the label is peeled off. However, the amount of the vapor is limited to a constant amount, and the internal pressure is maintained at a high pressure and a high temperature even after the opening, so that the food material is good. It has the advantage of steaming.

Further, since the portion to be peeled off has a heat shrinkage greater than that of the seal portion and includes a sheet which is overlapped and adhered to the seal portion, the production is further simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a method of forming a top seal film from a roll of polyethylene film for manufacturing a frozen food container of the present invention.

FIG. 2 is a perspective view showing one embodiment of the present invention.

FIG. 3 is a perspective view showing another embodiment of the present invention.

FIG. 4 is a plan view showing a modification of the top seal film used in the embodiment of FIG. 2;

FIG. 5 is an exploded perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

 C1 Container C2 Container C3 Container T1 Top Seal Film T2 Top Seal Film T3 Top Seal Film L1 Label L2 Label L3 Label H Small Hole

Claims (4)

[Claims] 1. A storage container in which frozen food is sealed,
A frozen food storage container, wherein the main body includes a plastic seal portion, and at least one portion of the seal portion has a portion that peels off due to heat shrinkage when heated. 2. The method according to claim 1, wherein the part to be peeled off includes a deaeration port opened in the seal part and a label which has a heat shrinkage greater than that of the sealing film and is attached to close the deaeration port. The frozen food storage container according to claim 1. 3. The frozen food storage container according to claim 2, wherein the deaeration port includes a small hole. 4. The frozen food storage device according to claim 1, wherein the portion to be peeled off includes a sheet having a heat shrinkage greater than that of the seal portion and overlapping and adhered to the seal portion. container.