| 摘要 |
PURPOSE: To provide a packaging container that does not need its internal space to be opened to the outside before heating in an electronic oven etc., and that does not allow various germs to enter should a vapor escape passage be opened during distribution process. CONSTITUTION: A non-heat-sealable part (n) is formed across a heat-sealable part (p) between the periphery (a) of an opening of a container (A) and a part of non-heat-sealable synthetic resin layers 1A and 1B of a laminate film 1. The container internal space (S) is connected to the container outside through a vent passage 4 comprising a through hole 3 formed, along the non-sealable part (n), in a synthetic resin layer 1B contacting the space (S) in order to connect the non-sealable part (n) to the space (S). The part of the synthetic resin layer 1A, 1B forming the non-sealable part (n) is closed tightly with an adhesive layer 6, which can be separated by a pressure in the space (S) when the pressure has exceeded a specified value. |
