| 摘要 |
The package bag for microwave cooking includes: a back seal portion formed by heat-sealing a pair of edges of a resin sheet which are opposed to each other; and edge seal portions formed by heat-sealing edges of the resin sheet so as to intersect with the back seal portion. The resin sheet includes a base material and a heat-seal layer provided on one surface of the base material, and the back seal portion is provided with an opening start portion used to tear the resin sheet. In the resin sheet, at least one opening auxiliary portion formed by linearly cutting the base material is provided on each of both sides of the back seal portion, and the opening auxiliary portion is disposed in a position to which a tear caused in the resin sheet when the package bag is opened from the opening start portion proceeds. |
