| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely store contents inside for heat cooking without breaking the bottom of a bottom member, to release inner vapor, etc., outside by opening automatically and easily a vent hole even when inner pressure goes up, in cooking contents usually in sealed and stored state. SOLUTION: A part or the whole of above a bottom seal part 4 is adhered with smaller adhesion than a packaging bag body 1 inside face and the bottom seal part for forming an opening seal part 5. A vent hole 3 is provided in a condition where the same is usually closed by a bottom member 2 at a position where the top part of the vent hole 3 touches the bottom seal top end edge part or above this relative to the packaging bag main body. When pressure in the packaging bag becomes more than predetermined, the opening seal part of the bottom member is peeled from the packaging bag main body for opening the vent hole.</p> |
