JP2893764B2 - Fall prevention container for microwave oven heating - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overturn prevention container which is prevented from overturning when heated in a microwave oven.

[Prior Art] Conventional containers frequently fall down when heated in a microwave oven and the contents are spilled. The cause is unknown and unclear, and there is no prevention method at present.

[Problem to be Solved by the Present Invention] In a case where a conventional container incorporates a liquid component and a solid component in particular, an accident occurs in which the container falls over when the electronic lens is heated and the contents are spilled. However, almost 100% of the cases require a microwave oven and a case in which a liquid component and a solid component are contained, so that this falling accident is a very serious problem.

An object of the present invention is to provide a container that solves this problem and that does not fall when heated by a microwave oven.

[Means for Solving the Problems] The present invention provides: 1. A circle having a diameter of 60 mm or less, an elliptical shape having a major axis of 60 mm or less, or a polygonal base having a diagonal length of 60 mm or less, having a polygonal bottom surface and a height of 60 mm or more. An overturning prevention container for heating a microwave oven, wherein a microwave adjusting layer for adjusting the amount of microwave whose longest portion having an insulating layer on the outer surface is 55 mm or less is provided on the bottom surface of a cylindrical container having the same.

2. The fall prevention container for heating a microwave oven according to claim 1, wherein the microwave adjustment layer disposed on the bottom surface for adjusting the amount of microwaves is a metal film.

3. The microwave heating device according to claim 1, wherein the microwave adjusting layer disposed on the bottom surface for adjusting the amount of microwaves is a layer formed of a composition in which metal powder is mixed with a synthetic resin. Fall prevention container.

4. The microwave oven heating device according to claim 1, wherein the microwave adjusting layer disposed on the bottom surface for adjusting the amount of microwaves is a metal film disposed inside the synthetic resin film forming the bottom portion. Fall prevention container.

5. The microwave adjusting layer provided on the bottom surface for adjusting the amount of microwaves is provided on the entire bottom surface.
The overturn prevention container for heating a microwave oven according to any one of claims 4 to 4.

6. The microwave oven heating according to any one of claims 1 to 4, wherein a microwave adjustment layer for adjusting the amount of microwaves, which is provided on the bottom surface, is partially provided on the bottom surface. For fall prevention container.

7. The microwave oven according to claim 6, wherein the microwave adjustment layer for adjusting the amount of microwaves, which is provided on the bottom surface, is provided in a continuous or discontinuous ring shape on the periphery of the bottom surface. Fall prevention container for heating.

8. The metal forming the microwave adjustment layer is aluminum,
The fall prevention container for heating a microwave oven according to any one of claims 1 to 7, wherein the container is one or more metals selected from iron, silver, and nickel.

9. The fall prevention container for heating a microwave oven according to any one of claims 1 to 8, wherein the container is made of ceramics such as waterproof paper, plastics, glass, and ceramics. About.

The present inventor has conducted various studies on the cause of the above-mentioned overturn, and as a result of waterproofing paper, blastics or glass, it has been found that the cause is caused by heating of the solid component contained in a container formed of ceramics such as ceramics. Clarified. That is, waterproof paper, plastics containing liquid components and solid components,
When a ceramic product such as glass or ceramics is heated in a microwave oven, the electric field generated by the microwave becomes very strong at the bottom, so that the solid component submerged at the bottom is heated strongly.
The liquid contained in the solid component evaporates rapidly. Therefore, the solid component bursts and gives a large impact to the container, especially a lightweight container jumps up by nearly 100 mm. This is the cause of the container falling.

The shape of the container is greatly related to the occurrence of such a fall. That is, there is a deep relationship between the bottom area of the container and the height of the container. The bottom area of the container relates to the strength of the electric field generated by the microwave generated at the bottom of the container, and the height of the container determines the center of gravity of the container and relates to the stability. A container having a large bottom area and a low height has a lower center of gravity and is more stable, so that the electric field at the bottom becomes stronger and the container is less likely to fall even if the solid component ruptures. However, containers with a capacity of around 180 ml, which are most in demand, usually have a bottom diameter of less than 60 mm and a height of more than 60 mm for ease of use and miniaturization. Containers of this size are very easy to fall when heated in a microwave oven. Such strong demands on the shape of the container have further exacerbated the problem of microwave heating overturning.

The overturn of a container of such a size is not limited to a cylindrical container. Even an elliptical container will fall if the major axis is 60 mm or less and the height is 60 mm or more, and the polygonal container will also fall if the diagonal line is 60 mm or less and the height is 60 mm or more.

The present inventor has conducted various studies to prevent rapid heating of such solid components at the bottom of the container and to prevent rupture of solids,
An adjustment layer is provided at the bottom of the container to control the penetration of microwaves,
By controlling the amount of microwaves entering the bottom of the container and changing the electric field strength and pattern at the bottom of the container when heating with a microwave oven, we succeeded in suppressing the heating rate of the solid components at the bottom and completed the present invention did.

What matters here is the discharge phenomenon between the adjustment layer and the turntable of the range.

A metal film is most effective as an adjusting layer for adjusting the penetration of microwaves, but the metal film is often discharged between the turntable of the microwave oven and the turntable when heated in a microwave oven. An accident occurs in which the coating film is destroyed or the container melts.

The present inventor has revealed that the discharge between the metal film and the turntable of the microwave oven is deeply related to the size of the adjusting layer at the bottom of the container for controlling the penetration of microwaves. According to the study of the present inventor, the adjustment layer having a length of 55 mm or more always discharges with the turntable.

It is for this reason that the size of the adjustment layer for adjusting the penetration of microwaves in the present invention is 55 mm or less at the longest part.

When a conductive material is introduced into a microwave region, an eddy current is generated in the conductive material, and the microwave absorbs and generates heat depending on the degree of conductivity. A conductive material having a surface electric resistivity of 11 to 5000 Ω / □ absorbs microwaves and generates heat. When such a substance is used as a microwave adjusting layer and disposed at the bottom of the container, it generates heat itself, and the solid material at the bottom of the container bursts due to the heat, and the container falls. Therefore, as a material that can be used as the microwave adjusting layer, a substance having a surface electric resistivity of 1 Ω / □ or less is suitable.

In the present invention, as the adjusting layer provided at the bottom of the container for adjusting the penetration of microwaves, a metal film such as silver, aluminum, nickel, and iron, such as a metal foil, or a laminated film obtained by laminating such a metal foil with a plastic film is most preferable. Although preferred, an adjustment layer formed of a composition such as a silver paste obtained by mixing these metal powders with a film-forming substance such as a synthetic resin is also effective. Although a metal plating film is also suitable, a metal deposition film may become a heating element depending on its thickness. For example, in the case of an aluminum deposition film, a thickness of 250 ° or more is preferable.

In the present invention, various phenomena also occur depending on the shape of the adjusting layer provided at the bottom of the container for controlling the penetration of microwaves.

Phenomena caused by the shape of the microwave adjusting layer include the degree of microwave reflection, heat generation due to electric field concentration, and the like.

When a metal material is introduced into the microwave region, the degree of microwave reflection differs depending on the size of the metal material, and the greater the reflection, the greater the degree of electric field concentrated at the end of the metal material.
The danger of discharge also increases.

The size of the adjustment layer that can be used as the microwave adjustment layer of the container of the present invention and has no danger of discharge is 55 mm or less in maximum length. The longest length is the diameter for a disk, the diagonal length for a polygon, the long diameter for an ellipse, the outer diameter for a ring, and the respective shape for a C-shape or spiral. Is the open length.

The adjustment layer is preferably formed on the bottom of the container in substantially the same shape as the bottom, but may be partially provided as described above. For example, they may be arranged in a ring shape or a plurality of rings may be arranged concentrically. In addition, they can be arranged in a spiral shape, arranged in a C shape or a lattice shape, arranged in parallel with linear adjustment layers, or arranged radially.

However, in the case of a C-shaped, ring-shaped, or rectangular shape, if the width (short side in the case of a rectangle) is 5 mm or less, the conductive material itself generates heat even if the surface electrical resistivity is 1 Ω / □ or less, There is a problem that the electric field is concentrated in the portion, and there is a problem such as electric discharge or heating of the container material near the end portion. When the adjusting layer having such a shape is used, it is preferable that the width is 6 mm or more.

Since the electric field is the strongest at the bottom peripheral edge, it is preferable that the adjustment layer disposed at the bottom of the container is arranged at this position because the electric field is strongest. In addition, there is a possibility that microwaves enter from the side surface of the rising portion of the wall near the bottom, and the electric field at the peripheral edge of the bottom becomes stronger. Therefore, it is preferable to dispose the microwave along the side of the rising portion of the bottom.

As a method of arranging an adjustment layer for adjusting the penetration of microwaves at the bottom of the container, a metal film is adhered in a predetermined shape,
Appropriate means such as vapor deposition and application and coating of a composition in which a metal powder is mixed with a film-forming substance such as a synthetic resin are employed. In addition, when the container is formed of a synthetic resin film, for example, a film in which metal powder is arranged in advance at the bottom peripheral edge and preferably at the portion forming the bottom peripheral edge and the bottom rising side surface is used to simultaneously form the container. An adjustment layer can also be formed.

In any case, it is important that when the adjustment layer having the same shape as the bottom is formed at the bottom of the container, its diameter or major axis or diagonal length is 55 mm or less, and when the adjustment layer is partially arranged. Means that the longest part must be 55 mm or less. The adjusting layer having a length of 55 mm or more always discharges with the turntable.

In addition, since an electric field becomes strong at the end of the adjustment layer, it is desirable to dispose an insulating layer.

[Operation] The present inventor considers the reason why such a phenomenon occurs when a liquid component and a solid component coexist, as follows.

Even when only a liquid component is contained, heating in a microwave oven causes the electric field due to the microwave to be very strong at the bottom, so that the liquid component at the bottom is strongly heated. However, since it is a liquid, convection occurs and heat conduction is performed smoothly, so there is no bumping and no large impact occurs, so that the container does not fall.

However, when the liquid component and the solid component coexist, the liquid component and the solid component at the bottom are similarly strongly heated by heating in a microwave oven. Unlike the liquid component, the heat of the solid component can be transmitted only by conduction, so that the heat of the solid component is difficult to diffuse smoothly. As a result, the temperature of the solid component at the bottom rapidly rises, so that the liquid contained in the solid component at the bottom rapidly evaporates, and the solid component bursts. The container falls over due to the impact generated by the rupture.

Surprisingly, at this time, the liquid component in the upper part has not yet been sufficiently heated, and is at a temperature of at most about 50 to 60 ° C.

The occurrence of such uneven heating will be described with reference to FIG.

Fig. 27 shows a plastic cup with a bottom diameter of 47 mm and a height of 100 mm filled with corn soup (solid content: containing 60 wt% corn) as a content and a microwave oven (Matsushita Electric Industrial Co., Ltd., NE- M340, 500W glass turntable)
The temperature-time curve of the sap and the solid when heat-treated at is shown, for example, when the sap is 38 ° C after 20 seconds, the solid is 10
0 ° C, and after 40 seconds the sap is 50 ° C and the solids are 120
It is understood that water in the solid material rapidly evaporates and the solid material bursts.

Next, the relationship between the heating temperature and the time depending on the position in the container is shown for several types of solids. Sap is water.

From these test results, it is understood that in order to prevent the container from overturning, it is necessary to adjust the amount of microwave penetration into the container bottom when heated in a microwave oven to prevent the electric field at the bottom from becoming too strong.

Next, in order to explain the operation of the present invention in an easy-to-understand manner, the problem of falling will be described in detail with reference to some experimental examples.

Experimental method (length of microwave adjusting layer and falling of container) 15mm thick aluminum foil of various diameters and thickness of disk on the outside of the bottom of plastic cup container with bottom diameter 47mm and height 100mm Provide a laminate of 25μ polyethylene terephthalate film, fill with 180ml (solid content: 10g corn) of commercially available corn cream soup as a content, and use a microwave (Matsushita Electric Industrial Co., Ltd. NE-M340, 500W glass turn) Table), and the relationship between the fall of the container and the diameter of the disk-shaped metal foil was examined.

The problem of preventing the fall by adjusting the microwave in this way has been clarified, but it cannot be actually applied by itself. That is, the problem of discharge between the adjustment layer and the turntable of the range must be solved.

Next, the problem of the discharge will be described with reference to specific experimental examples.

Experimental method (microwave adjustment layer length and discharge) A disk-shaped aluminum foil of various diameters and a thickness of 15μ and a thickness of 25μ were placed outside the bottom of a plastic cup-shaped container with a bottom diameter of 60mm and a height of 100mm. Provide a polyethylene terephthalate film laminate, inject water as the contents, heat-treat with a microwave oven (NE-T50, 500W metal net turntable manufactured by Matsushita Electric Industrial Co., Ltd.), and discharge between the turntable and metal foil. Was examined.

As described above, according to the study of the present inventors, the discharge between the metal film and the turntable of the microwave oven is deeply related to the size of the adjustment layer for adjusting the penetration of the microwave at the bottom of the container,
The adjusting layer having a length of 55 mm or more always discharges with the turntable.

It is understood that the container of the present invention solves both the problem of discharge and the problem of overturning.

Next, the fact that the constituent elements of the present invention are integrally combined with each other and have a synergistic action will be specifically described. For easy explanation, the results of comparative tests on the shape of the container, the shape and type of the microwave adjusting layer, the type of the contents, and the falling of the container are shown.

(A) Relationship between container shape and container overturning Using a 1.5 mm-thick polypropylene film, containers of various shapes are formed by ordinary vacuum forming, and water and a cone (6 wt%) are contained as contents in each container. Use a commercially available microwave oven (Toshiba ER-225 500W glass turntable) and fill it with 80% of the internal volume.
Heated at 00W for 2 minutes. Table 4 shows the results.

This test shows that containers 5, 7, 8, and 9 having a bottom diameter of 60 mm or less and a height of 60 mm or more fall. It is understood that the container 4 having a height of 60 mm or more and a bottom diameter of 60 mm or more, and the container 10 having a bottom diameter of 60 mm or less and a height of 60 mm or less are difficult to fall. And a container 5 having a bottom diameter of 60 mm or less and a height of 60 mm or more,
7, 8, and 9 are the most in demand containers.

(B) Relationship between the shape of the microwave adjusting layer and the falling of the container A polypropylene container having a diameter of 63 mm, a bottom diameter of 53 mm, and a height of 87 mm was used as the container, and the microwave adjusting layer was provided at the bottom.
Laminated films of 12 μm polyethylene terephthalate film and 9 μm aluminum foil were cut into various shapes and adhered with an adhesive. 185 g of commercially available corn soup (solid content: 6 wt% corn) is placed in this container, and the shape of the microwave adjusting layer is adjusted using a commercially available microwave oven (National NE-M340 500W glass-turntable manufactured by Matsushita Electric Industrial Co., Ltd.). And the fall of the container. Table 5 shows the results.

From this test, it can be seen that any of the microwave adjusting layers having various shapes can exhibit the overturn preventing effect if the maximum length is 55 mm or less.

(C) Relationship between the type of microwave adjustment layer and the fall of the container A microwave container with a diameter of 45 mm made of various materials is used for the bottom of a polypropylene container with a diameter of 63 mm, a bottom diameter of 47 mm, and a height of 96 mm. A container provided with a layer was used. In this container, a commercially available corn soup (solid content: corn 6 wt.
%), And using a commercially available microwave oven (National NE-M340 500W glass turntable manufactured by Matsushita Electric Industrial Co., Ltd.), the type of the microwave adjustment layer and the falling of the container were examined. Table 6 shows the results.

[Note] The conductive silver paste 2 is an example in which a microwave adjusting layer in which a conductive film of 5 μm is formed on a 12 μm polyethylene terephthalate film is adhered to the bottom of the container with an adhesive.

The aluminum powder of No. 3 is an example in which a microwave adjusting layer formed of a sheet having a sheet thickness of 250 μ formed by mixing metal aluminum powder and polypropylene was adhered to the bottom of the container with an adhesive. The content of metal aluminum powder is 75 wt%.

The aluminum vapor-deposited film No. 4 is an example in which a microwave adjusting layer in which a 0.1 μm metal aluminum vapor-deposited film is formed on a 12 μm polyethylene terephthalate film is adhered to the bottom of the container with an adhesive.

The iron foil No. 5 is an example in which a microwave adjusting layer formed of a laminate of a 15 μm iron foil laminated on a 12 μm polyethylene terephthalate film was adhered to the bottom of the container with an adhesive.

The nickel plating film No. 6 is an example in which a microwave adjusting layer formed of a film having a nickel plating film of 20 μm provided on a polycarbonate film of 15 μm was adhered to the bottom of the container with an adhesive.

From this test, it is understood that various microwave adjusting layers are effective in preventing the fall.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. Practical tests have been added for representative examples.

Embodiment 1 FIG. 1 is an embodiment showing a front section of a fall prevention container of the present invention, and FIG. 2 is a front view of a bottom portion of the container.
In the drawing, reference numeral 1 denotes a polypropylene container having a diameter of 63 mm, a bottom diameter of 53 mm, and a height of 87 mm, and shows a container having a microwave adjusting layer adhered to the bottom with an adhesive. Numeral 2 denotes a bottom portion of the container, in which a disk-shaped microwave adjusting layer 3 having the same diameter as the bottom of a laminated film of 12 μm polyethylene terephthalate film and 9 μm aluminum foil is provided as a microwave adjusting layer.
4 is an upper opening.

In this container, a commercially available corn soup (solid content: corn 6w)
(t%) of 185 g, and heated at 500 W for 2 minutes using a commercially available microwave oven (National NE-M340 500 W glass-turntable manufactured by Matsushita Electric Industrial Co., Ltd.).

 The contents were sufficiently heated without any overturning of the container.

Embodiment 2 FIG. 3 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 4 is a front view of a bottom portion of the container.
In the figure, 1 is 96 mm in height, 63 mm in diameter, 47 mm in outer diameter at the bottom, and the inside is upward.
A polypropylene container having a convex shape of 2 mm and an outer diameter of the convex portion of 37 mm is shown. Reference numeral 2 denotes a vapor-deposited film in which a 0.1 μm aluminum vapor-deposited film is provided on a 12 μm polyethylene terephthalate film at the bottom of the container. A disc-shaped microwave adjusting layer 3 having a diameter of 47 mm, which is formed by sticking to the convex portion with an adhesive, is provided. 4 is an upper opening.

Into this container, 185 g of a commercially available meat sauce (solid content: beef, carrot, 6 wt% of pork) is placed, and a commercially available microwave oven (National NE-M340 manufactured by Matsushita Electric Industrial Co., Ltd.) is used.
Heated at 0W for 2 minutes.

 The contents were sufficiently heated without any overturning of the container.

Embodiment 3 FIG. 5 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 6 is a front view of a bottom portion of the container.
In the figure, 1 is a polypropylene container having a height of 87 mm, a diameter of 63 mm and a bottom diameter of 53 mm, and 2 is a bottom portion of the container, which is formed by adhering a laminated film of a 12 μm polyethylene terephthalate film and a 9 μm aluminum foil with an adhesive. And a disk-shaped microwave adjusting layer 3 having a diameter of 50 mm. 4 is an upper opening.

In this container, a commercially available corn soup (solid content: corn 6w)
(t%) of 185 g, and heated at 500 W for 2 minutes using a commercially available microwave oven (National NE-M340 manufactured by Matsushita Electric Industrial Co., Ltd.).

 The contents were sufficiently heated without any overturning of the container.

Embodiment 4 FIG. 7 is an embodiment showing a front section of a fall prevention container of the present invention, and FIG. 8 is a front view of a bottom portion of the container.
In the figure, reference numeral 1 denotes a polypropylene container having a height of 87 mm, a diameter of 63 mm, and a bottom diameter of 53 mm. Reference numeral 2 denotes a bottom of the container, which is formed by adhering a laminated film of 12 μm polyethylene terephthalate film and 15 μm iron foil with an adhesive. The microwave adjusting layer 3 is a donut-shaped disk having an outer diameter of 50 mm and an inner diameter of 30 mm.
4 is an upper opening.

In this container, a commercially available corn soup (solid content: corn 6w)
(t%) of 185 g, and heated at 500 W for 2 minutes using a commercially available microwave oven (National NE-M340 manufactured by Matsushita Electric Industrial Co., Ltd.).

 The contents were sufficiently heated without any overturning of the container.

Embodiment 5 FIG. 9 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 10 is a front view of a bottom portion of the container.
In the figure, reference numeral 1 denotes a container, and 2 denotes a container bottom portion, on which two ring-shaped microwave adjusting layers 3 formed concentrically are disposed. 4 is an upper opening.

Embodiment 6 FIG. 11 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 12 is a front view of a bottom portion of the container.
In the figure, reference numeral 1 denotes a container, 2 denotes a bottom of the container, on which a small disk-shaped microwave adjusting layer 3 is partially disposed. 4 is an upper opening.

Embodiment 7 FIG. 13 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 14 is a front view of a bottom portion of the container.
In the figure, 1 is a polypropylene container having a height of 87 mm, a diameter of 63 mm and a bottom diameter of 53 mm, and 2 is a bottom portion of the container, which is formed by adhering a laminated film of a 12 μm polyethylene terephthalate film and a 9 μm aluminum foil with an adhesive. , Width 10mm length 53
A mm-shaped cross-shaped microwave adjustment layer 3 is provided. 4
Is an upper opening.

In this container, a commercially available corn soup (solid content: corn 6w)
(t%) of 185 g, and heated at 500 W for 2 minutes using a commercially available microwave oven (National NE-M340 manufactured by Matsushita Electric Industrial Co., Ltd.).

 The contents were sufficiently heated without any overturning of the container.

Embodiment 8 FIG. 15 is an embodiment showing a front section of a fall prevention container of the present invention, and FIG. 16 is a front view of a bottom portion of the container.
1 is a polypropylene container having a height of 87 mm, a diameter of 63 mm and a bottom diameter of 53 mm, and 2 is a bottom portion of the container, which is formed by sticking a plating film having a nickel plating layer of 20 μm on a 12 μm polycarbonate film with an adhesive. Outer diameter 50mm and inner diameter 40mm
A microwave adjusting layer 3 having a 10 mm wide and 40 mm long cross-shaped body formed of the same plating film is disposed on the inner circle of the ring-shaped plate. 4 is an upper opening.

In this container, commercially available minestrone (solid content: potatoes, carrots, onions, tomatoes, cabbage, green peas,
185 g of bacon (10% by weight) is put in a commercially available microwave oven (National NE-M340, manufactured by Matsushita Electric Industrial Co., Ltd.).
Heated at 0W for 2 minutes.

 The contents were sufficiently heated without any overturning of the container.

Embodiment 9 FIG. 17 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 18 is a front view of a bottom portion of the container.
In the figure, reference numeral 1 denotes a container, and 2 denotes a bottom of the container, on which a microwave adjusting layer 3 formed in a lattice shape is provided. 4 is an upper opening.

Embodiment 10 FIG. 19 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 20 is a front view of a bottom portion of the container.
In the figure, reference numeral 1 denotes a container, 2 denotes a bottom of the container, and a ring-shaped microwave adjusting layer 3 is provided on a peripheral portion thereof. 4 is an upper opening. This embodiment is an example in which a microwave adjusting layer is provided in a portion where the electrolysis becomes strongest.

Embodiment 11 FIG. 21 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 22 is a front view of a bottom portion of the container.
In the figure, reference numeral 1 denotes a container, 2 denotes a container bottom, and a ring-shaped microwave adjusting layer 3 is disposed on a peripheral portion and a wall rising portion thereof. 4 is an upper opening. This embodiment is an example in which a microwave adjusting layer is provided in a portion where the electrolysis becomes strongest.

Embodiment 12 FIG. 23 is an embodiment showing a front cross section of a fall prevention container of the present invention, and FIG. 24 is a front view of a bottom portion of the container.
In the figure, reference numeral 1 denotes a container, 2 denotes a container bottom, on which a microwave adjusting layer 3 covering the bottom and the wall rising portion is provided. 4 is an upper opening. This embodiment is also an example in which a microwave adjustment layer is provided in a portion where the electrolysis becomes strongest.

Embodiment 13 FIG. 25 is an embodiment showing a front section of a fall prevention container of the present invention, and FIG. 26 is a front view of a bottom portion of the container.
In the figure, 1 is 96 mm in height, 63 mm in diameter and 47 mm in outside diameter, and the inside is 5 m upward.
m denotes a polypropylene container having a convex shape and a convex outer diameter of 37 mm. Reference numeral 2 denotes a bottom of the container, and a film in which a 12 μm polyethylene terephthalate film is provided with a 5 μm conductive silver film is coated with an adhesive. A shallow cup-shaped microwave adjusting layer 3, which is attached to the convex portion and attached to a height of 5 mm near the bottom of the outer wall of the container, is provided. 4 is an upper opening.

185 g of commercially available beef curry (solid content: beef, carrot, 30 wt%) was put into this container, and heated at 500 W for 2 minutes using a commercially available microwave oven (National NE-M340 manufactured by Matsushita Electric Industrial Co., Ltd.).

 The contents were sufficiently heated without any overturning of the container.

Comparative Example 1 The procedure was the same as Example 3 in FIGS. 5 to 6 except that the microwave adjusting layer was not provided.

 All containers were overturned and could not be heated.

Comparative Example 2 The procedure of Example 4 was repeated except that the microwave adjusting layer was not provided.

 All containers were overturned and could not be heated.

Comparative Example 3 The same operation as in Example 7 was performed except that the microwave adjusting layer was not provided.

 All containers were overturned and could not be heated.

Comparative Example 4 The procedure of Example 8 was repeated except that the microwave adjusting layer was not provided.

 All containers were overturned and could not be heated.

Comparative Example 5 The procedure of Example 2 was repeated except that the microwave adjusting layer was not provided.

 All containers were overturned and could not be heated.

Comparative Example 6 The procedure of Example 13 was repeated except that the microwave adjusting layer was not provided.

 All containers were overturned and could not be heated.

[Effects] As described above, the present invention completely solves the problem of the container falling over when heated by a microwave oven, which has not been able to be solved conventionally, and completely eliminates the discharge between the turntable and the heated space. It is effective in preventing and exerting excellent effects.

[Brief description of the drawings]

1 to 26 show an embodiment of the present invention. The odd-numbered drawings show a front cross section of the container, and the even-numbered drawings are front views of the container bottom. FIG. 27 is a graph showing a temperature change due to heating of the contents. DESCRIPTION OF SYMBOLS 1 ... Container 2 ... Bottom part 3 ... Microwave adjustment layer 4 ... Top opening

Claims (9)

(57) [Claims] 1. A circular container having a diameter of 60 mm or less, an elliptical shape having a major diameter of 60 mm or less or a polygonal base having a diagonal length of 60 mm or less, and a polygonal bottom having a height of 60 mm or more. A fall prevention container for heating a microwave oven, comprising a microwave adjusting layer for adjusting the amount of microwave whose longest portion having an insulating layer on the surface is 55 mm or less. 2. The overturn prevention container for heating a microwave oven according to claim 1, wherein the microwave adjusting layer disposed on the bottom surface for adjusting the amount of microwaves is a metal film. 3. The electronic device according to claim 1, wherein the microwave adjusting layer disposed on the bottom surface for adjusting the amount of microwaves is a layer formed of a composition in which a metal powder is mixed with a synthetic resin. Fall prevention container for microwave heating. 4. The electron according to claim 1, wherein the microwave adjusting layer disposed on the bottom surface for adjusting the amount of microwaves is a metal film disposed inside the synthetic resin film forming the bottom surface. Fall prevention container for microwave heating. 5. A microwave adjusting layer provided on the bottom surface for adjusting the amount of microwaves is provided on the entire bottom surface.
The fall prevention container for heating a microwave oven according to any one of claims 1 to 4. 6. The method according to claim 1, wherein a microwave adjusting layer for adjusting the amount of microwaves, which is provided on the bottom surface, is partially provided on the bottom surface. Fall prevention container for microwave oven heating. 7. The method according to claim 6, wherein the microwave adjusting layer for adjusting the amount of microwaves, which is provided on the bottom surface portion, is provided on the peripheral portion of the bottom surface portion in a continuous or discontinuous ring shape. Fall prevention container for microwave oven heating. 8. The microwave oven according to claim 1, wherein the metal forming the microwave adjusting layer is one or more metals selected from aluminum, iron, silver and nickel. For fall prevention container. 9. The container according to any one of claims 1 to 8, wherein the container is made of ceramics such as waterproof paper, plastics, glass, and ceramics. .