| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent burst during heat cooking by a microwave oven, by imparting easy-to-release properties to a thermal adhesive part, also by forming a projection part so as to project in the direction of the inside of the hermetically-sealed container, and by forming a cutting blade or notch in it. SOLUTION: When a container 1 is subjected to heat cooking in a microwave oven, vapor generated from food and air in a package bag thermally expand, and consequently internal pressure F increases and the hermetically-sealed container 1 swells up. On the other hand, from the inside of the hermetically-sealed container 1, release due to layer-interspace release or cohesive failure caused by the internal pressure F starts to occur between the innermost layers or in the innermost layers of a substantially-semicircular projection part 3 formed almost in the middle of one side of the hermetically-sealed container 1. Then, the hermetically-sealed container 1 allows the escape of the internal pressure F when the release caused in the substantially- semicircular projection part 3 almost in the middle of the one side of the hermetically- sealed container 1 reaches a notch 4, and thus preventing the hermetically-sealed container 1 itself from bursting. In addition to that, the foot stored in the hermetically- sealed container 1 can be allowed to settle by its own heat until the relapse caused in the projection part 3 reaches the notch 4.</p> |
