JPH03215225A - Pressure vessel for electronic range - Google Patents

Abstract

PURPOSE:To enable pressure cooking to be performed with microwave in an electronic range shed by forming a vessel with a resin body consisting of polyphenylene sulfide resin and glass fibers. CONSTITUTION:A resin body cover 2 and a resin body main body vessel 3 consist of polyphenylene sulfide resin and 30-50wt.% glass fibers, and are formed with the resin body of the tensile strength of 500kg/cm<2>-2500kg/cm<2>. When the vessel is irradiated with microwave, then the polyphenylene sulfide resin is hardly heated, and a food 4 or the like containing water is heated more, and steam or the like is generated, and internal pressure is heightened. Besides, when the glass fibers are added by 30-50wt.%, then the strength of the resin is heightened, and it can resist cooking with pressure. Besides, by using the resin body of the tensile strength of 500kg/cm<2>-2500kg/cm<2>, molding property is improved, and the pressure vessel which is not broken when pressure is applied can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a container used in a cooking device such as a microwave oven that uses microwaves for cooking, and particularly to a container whose interior is heated to high temperature and pressure for cooking.

Conventional Technology Previously, there was a pressure cooker as a cooking device for cooking under pressure. However, since pressure cookers are made of metal, they cannot be used for microwave cooking. In addition, although there have been various containers used for heating in microwave ovens, they were not designed to cook food under pressure, such as by opening the lid of the container. Problems to be Solved by the Invention Since metal containers are conductors, they reflect or absorb microwaves, making it difficult for microwaves to reach the inside, making it impossible to efficiently heat the object inside the container. was there. Furthermore, since conventional microwave oven containers are non-conductive, they allow microwaves to penetrate deep into the container and efficiently heat the object inside the container, but they have low heat resistance and low pressure resistance. There was a problem that cooking at high temperature and pressure was not possible due to the low temperature.

The present invention solves the above problems and aims to provide a container that enables pressure cooking in a microwave oven.

Means for Solving the Problems In order to achieve the above object, the present invention has a first means of forming a resin body consisting of a polyphenylene sulfide resin and 30 to 50% by weight of glass fiber. The tensile strength of the resin body consisting of 30-50% by weight of glass fiber is 500kg/c+j
The second method is to form it from a resin body with a weight of ~2500 kg/c-. Function: With the above-described configuration, the present invention enables pressure cooking by applying radio waves inside the microwave oven.

This is because the dielectric constant of polyphenylene sulfide resin is 4.
80 is lower than that of water before and after water, so if you make a container with polyphenylene sulfide resin and irradiate it with microwaves, polyphenylene sulfide resin is difficult to heat and food containing moisture inside will be heated more, releasing water vapor, etc. This is because the internal pressure increases, and by adding 30 to 50% by weight of glass fiber to polyphenylene sulfide resin, the strength of the resin is increased and it becomes able to withstand cooking under pressure. be.

Examples Examples of the present invention will be described below. As shown in Fig. 1, in a pressure vessel l in which a resin M2 and a resin main container 3 are made of resin, microwaves reach the food 4 inside, which heats the food and generates steam inside the container. pressure is applied to

As shown in FIG. 2, in the pressure cooker 5 in which the metal lid 6 and the metal main container 7 are made of metal, the microwaves are reflected on the surface and do not reach the food 4 inside, so the food 4 is heated. There is no pressure inside the container.

Polyphenylene sulfide resin has a dielectric constant of around 4, which is lower than water's dielectric constant of 80. Therefore, if a container is made of polyphenylene sulfide resin and irradiated with microwaves, polyphenylene sulfide resin is difficult to heat and food containing moisture inside is heated more. This generates water vapor, etc., and the internal pressure increases. Therefore, if the strength of polyphenylene sulfide resin is sufficient, pressure cooking becomes possible. Conversely, if the strength of the polyphenylene sulfide resin is insufficient, the container will be destroyed and pressure cooking will not be possible.

When polyphenylene sulfide resin is blended with less than 30% by weight of glass fiber, air bubbles etc. enter into the resin body, making it difficult to mold and having a high molding shrinkage rate, which causes dimensional deviation when a container is formed, making it difficult to apply pressure. Furthermore, if more than 50% by weight of glass fiber is blended into the polyphenylene sulfide resin, the resin body becomes hard but brittle, becomes weak against impact, and has poor moldability. If the tensile strength of the resin body was less than 500 kg/ctl, the container would break and no pressure would be applied. Moreover, when the tensile strength of the resin body exceeded 2500 kg/C-, moldability was poor and a molded body could not be formed. This corresponds to when the amount of glass fiber exceeds 50% by weight, and the tensile strength is 2500 kg/d.
As it grew larger, the resin body became brittle and weaker against impact.

If you put resin or other material in a microwave oven and continue to irradiate it with microwaves, the temperature will rise and exceed 200°C. However, polyphenylene sulfide resin has a heat resistance of 2.
It is safe because it can withstand continuous use in a microwave oven at a high temperature of 60°C, and is flame retardant or self-extinguishing, so it will not catch fire or catch fire. Furthermore, polyphenylene sulfide resin has strong chemical resistance, resistance to contamination by seasonings and foods, and low water absorption, making it suitable for pressure vessels.

Moreover, when an inorganic filler such as calcium carbonate was added to the resin body, the resin body could be molded with almost no decrease in strength or moldability up to 30% by weight. Preferably it is 15 to 25% by weight.

As described above, the effect of the invention is that 30% of the polyphenylene sulfide resin
It can be used as a pressure vessel for a microwave oven by forming it from a resin body containing ~50% by weight of glass fiber. Furthermore, the tensile strength is 500kg/d to 2500kg/d.
By using a CD resin body, it is possible to obtain a pressure vessel that has good moldability and does not break when pressure is applied. Furthermore, by using polyphenylene sulfide resin, it can be used as a pressure vessel with less contamination of foods and deterioration due to hot water.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a pressure vessel for a microwave oven showing an outline of an embodiment of the present invention, and FIG. 2 is a sectional view showing an outline of a conventional pressure cooker. 1...Pressure vessel, 2...Resin lid,
3...Resin body container.

Claims (2)

[Claims] (1) A pressure vessel for a microwave oven formed of a resin body made of polyphenylene sulfide resin and 30 to 50% by weight of glass fiber. (2) The tensile strength of the resin body made of polyphenylene sulfide resin and 30 to 50% by weight of glass fiber is 500%.
A pressure vessel for a microwave oven made of a resin body with a weight of kg/cm^2 to 2,500 kg/cm^2.