JPS63162480A - Method of preventing thermal deformation of thin plastic vessel at time of filling and heating - 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 The present invention is a thin-walled plastic container filled with a ready-to-cooked food, sold with a lid, and then heated in a microwave oven before being consumed. A pair of containers, for serving! ! It's about protection. Fields to which the technology of the present invention is applied in detail f! :explain. (stomach)
The use of thin-walled plastic containers for iJL is generally made of materials such as vinyl chloride, polyethylene, polystyrene, etc., and is manufactured using vacuum molding, injection molding, and compression molding methods. Generally speaking, the thickness is about 5 mm or less.

(171'i4?P*Items are stored and cooked in close contact with each other. Typical items traditionally stored in thin-walled single-stick containers and cooked and eaten as they are are (A) Instant ramen is made by drying the noodles, putting them in containers, sealing them and selling them, and re-cooking them by opening the container, pouring boiling water, leaving the lid on for a few minutes, and restoring the noodles. Yes, this thing is! A I
Do not use any heat source other than 4, so don't use an electric microwave.)
This is not applicable to the present invention. (+(JAF
'l! Dry the food and store it in a container. For cooking, remove the lid and pour water up to the inside line of the cup.
2. Heat the product for 5 minutes at 15 (10W, 71.) using an electric power source without doing any of the above steps, and it will be completed. is [
This is different from 1) Heat it in the microwave.
(') The present invention allows cooking "while still young," that is, storing the fully cooked state in a container, sealing it, and storing it, for example, freezing it and storing it for reuse cooking. Add water without adding water, etc.
: Open pores (about 3 m n+ in diameter) that allow the air to escape and heat them in a microwave to complete the process. This type of food does not deteriorate in taste due to the addition of water, etc., and the taste of this type of food does not deteriorate due to the addition of water etc. It has the advantage of being able to provide the desired taste. (c) Using a microwave oven as a heating heat source. This method is a convenient method because it allows a plastic T-shaped container that cannot be used over an open flame to be used as a heating container and tableware.

The advantage of using thin-walled plastic is r4! There is a principle that it is a disposable container, and it is an essential condition that it be as cheap as possible.The wall thickness must be as thin as 0r1#, and it is necessary to choose a material with a low 1-grade rating as much as possible. Therefore, the above-mentioned conditions must be met, with the durability against heating being at the very limits of performance. The material selected in this way is designed to prevent the temperature of the stored food from rising by 1-1 when heated in the microwave, which is conducted to the container and softens, which occurs when the container is molded.
Trying to transform from the ``hizu・mi'' part. This current situation 1 is
There are also differences depending on the molding method, and this tendency seems to be greater in those using the vacuum molding method. In either case, the shape of the container changes significantly to the naked eye, and its commercial value is lost.

The present invention has discovered a phenomenon in which, by suppressing the heating near the edge of the container shape, not only can thermal softening of the edge be prevented and deformation, but also the thermal deformation of the entire container can be extremely reduced. , f11 river. The details will be explained below using examples.

(Example 1) Polystyrene 'IJ 1 shown in Figures 1 and 2
411', (0,9th m '82% (300c
c container) 150 fi cooked frozen food in each of 2111i1
G is stored, and 1 piece 0 is heat-pressed with poly and aluminum ml coated with RJ adhesive as in No. JLia, and a small hole 9 is made for each irises, and both are placed in a 500W microwave oven. inside 8
When the cooking was completed after 1 ff1 treatment, the edge 1- of the polystyrene A container was deformed into a serpentine shape, and the upper half of the main portion was deformed. On the other hand, in the case of the container made of aluminum foil n, no deformation of the R part or the main body part was visually observed.

The main point of the present invention is to prevent heating of the edges of the microwave oven. This is because the edges are not shielded from radio waves.

(Example 2) Thin polystyrene wall (wall Fi) shown in Figure 3.
1 mm l container (300c, c.

When the container was crimped onto a container, a small steam vent hole was made, and the container was heated in a 500W microwave oven for 8 minutes to complete cooking, the edge of the container was deformed, and the main body was also visible to the naked eye. No deformation was observed. However, at the same time, for comparison, polystyrene formation 1? Containers sealed with lids (Fig. 4) were exposed under the same conditions to 6 portions and edges.

Both the main body 7 were deformed, with the neck being the most severely deformed, followed by the edge and then the main body.

(Example 3) 11η Output Example 1 1. Polystyrene b used for company use and has a track record of being deformed by microwave cooking.
When cooking in the microwave, place one ring (Fig. 1) on the container as shown in Fig. 1.

Similar to the deformation prevention results in Examples 1 and 2, no deformation of the container occurred.

As mentioned above, the present invention covers the area near the edge with a metal layer, reflects radio waves in the microwave oven, and prevents penetration near the edge. 11. Preventing deformation of the edges and establishing a fixation site in the container by "■"
It is thought that this prevents the deformation tendency of other parts. Therefore, forming the four parts from a material obtained by applying metal heat η to a plastic sheet also has an effect similar to that of the embodiment described above.

4. Explanation of U4 Figure 1 shows a container in which cooked food is stored in a thin-walled plastic container, and the edges are tightly glued to plastic packaging. Cross-sectional view.

No. 21:4... Ill sectional view showing a state in which cooked food is stored in the thin-walled plastic container of the present invention and aluminum foil is tightly adhered to the edge.

No. 314... A cross-sectional view showing a state in which frozen cooked food is stored in the thin-walled plastic container of the present invention and secured by wrapping aluminum foil around the edge to enrich the food.

Figure 1... A cross-sectional view showing the state in which frozen prepared rIF food is stored in a meat plastic container and the lid is placed on top. 6 Figure 5... [i4] A cross-sectional view showing a state in which the built-in container is crowned with a ring molded from No. 6U54 aluminum foil.

No. 61"ll... A glimpse of the ring made of aluminum 2h [7I.

1... Container body, 2... Container edge 3 - Container lid.

4. Small hole to release added internal pressure.

5... Aluminum foil 6... Adhesive layer.

7...Aluminum foil ring.

8.-- Stored food.

Claims (1)

[Claims] When a thin-walled plastic container containing prepared food is sealed and heated in a microwave oven, the edges of the container are sealed, shaded, or covered with metal foil or a material with a metal film layer. A method of suppressing heating of the edges and preventing deformation of the container due to heating.