| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealable packaging bag which can safely and reliably perform the heating while retaining water content in a frozen food removed by the microwave. SOLUTION: The packaging bag is formed of a laminate film comprising a base layer and a thermal-bonding layer. The cohesive-destructibility printing using a photo-gravure ink containing at least one kind of nitrocellulose, polyurethane and polyamide as a resin composition is performed between the base layer and the thermal-bonding layer of a thermally-bonded part. The bag is heated by the microwave in a microwave oven to perform the cohesive destructibility of the printed layer, and then, the thermally-bonding layer is broken to form deaeration holes. |
