| 摘要 |
PROBLEM TO BE SOLVED: To open a storage bag without generating a large rupture sound when a food is heated by a microwave oven and easily and economically manufacture the storage bag. SOLUTION: When respective side edges of a nylon-polyethylene film are overlapped each other and a central seal section 13 is formed by heat fusion bonding, the temperature of the central section is set lower than the temperature of its both side sections, and the central section is formed into a lower bonding section 13b of weak bonding force, while both side sections are formed into high bonding section 13a of strong bonding force. A bottom seal section 14 is so heat fusion bonded as to form adequate linear clearances in parallel, and breathability is provided in the inner and outer direction of a storage bag 10. When the storage bag is heated by a microwave oven, a part of water vapor inside is passed through the breathable bottom seal section 14 and exhausted outside, and the internal water vapor pressure is raised slowly, and the bonding of the low bonding section 13b of the central seal section 13 is released from bonding without generating a large rupture sound and opened. |
