| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a packaging bag which prevents an independent packing chamber arranged in a peripheral edge seal part from communicating with outside air by peeling a peripheral edge part even when a gas filled in the independent packing chamber expands with increasing ambient temperature and does not allow the gas filled inside to escape.SOLUTION: In a packaging bag 100, an independent packing chamber 4 which consists of an unsealed part and expanded with a gas is provided in a peripheral edge seal part, and a spare chamber 6 consisting of an unexpanded unsealed part is connected to the independent packaging chamber through a weak seal part 5. The heat seal strength of the weak seal part is 30-70% of the heat seal strength of the peripheral edge seal part 2b in which the independent packing chamber is provided, and the distance between the independent packing chamber and the spare chamber is 10 mm or smaller.</p> |
