| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the inside of a bag used for a microwave oven while containing a liquid from being heated and the bag from breaking, by providing at least a metallic thin film and forming the film so that it always shows a larger angle than a specified one. SOLUTION: A laminate body 13 composed of polyethylene film 11 and aluminum foil 12 and another laminate body 16 composed of polyethylene film 14 and aluminum foil 15, are stuck to each other and the end thereof is pressed with heat to form a heat-seal part 18 and produce a bag 10. The metallic thin film 12 is shaped not to have a 100 degrees or smaller angle. When the angle is more acute than 100 degrees, electric field is concentrated in that corner to generate a discharge phenomenon. When the angle is more obtuse than 100 degrees, that phenomenon can be restricted. Accordingly, it can be used for a microwave oven. Since the bag 10 is made of a thin metallic film, microwave is not transmissible and hence, the liquid content is not boiled and the air in the bag is not expanded.</p> |
