| 摘要 |
PROBLEM TO BE SOLVED: To enable pressure in the package to escape automatically by forming a heat-adhesion part provided on the flange of a vessel main body to have easy releasability, and providing an extended part on at least one part of the heat-adhesion part, and further making a projection part on the flange in the proximity of the extended part. SOLUTION: A package body 1 adapted to house foodstuffs such as cooked or half cooked noodles is formed with a heat-adhesion part 2 including the uppermost layer of a flange and the innermost layer of a flange and the innermost layer of a lid body 5 of a vessel main body 6; which are adhered to have easy releasability. Subsequently, an extended part 3 is formed at one substantially central position of one side of the heat adhesion part 2, and a projection part 8 is formed in the vicinity of the distal end of the extended part 3. Then, when such a package body 1 is put into a microwave oven to be heat-cooked and the inner pressure is raised, the occurrence of interlayer release or release caused b coagulation destruction at the innermost layer of the extended part 3 or at the innermost layer is allowed to start from the inside of the package body 1, thereby permitting inner pressure to escape so as to prevent the package body 1 from bursting. |
