| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a packaging bag which can be heated as it is hermetically sealed in a microwave oven by forming the bag of a laminated film of a base material layer and a sealant layer and oposing the seal part constituting the packaging bag to the sealant layer on which a polar group is provided on the surface, and heat-sealing them. SOLUTION: This packaging bag 10 is made of laminated films 11 of a base material layer 12 and a sealant layer 13. The sealant layer 13 provided with a polar group at the surface is formed of a part of the seal part of the packaging bag. The sealant layer 13 can be processed with a corona discharge treatment and it is a heat-sealable resin layer. In this laminated layer film, the bag 10 is manufactured so that the sealant layer 13 is arranged at the inside face. The sealant layer on which a polar group is provided, is formed at a part of a seal part 21 of the laminated film constituting the packaging bag and it is heat-sealed with the other lamunated layer film to form a seal part 22. In this way, food in the bag can be cooked in a microwave oven without unsealing it, and hence usability thereof can be enhanced.</p> |
