PACKAGING MATERIAL FOR MICROWAVE OVEN, AND PACKAGING BAG USING IT

摘要

PROBLEM TO BE SOLVED: To provide a packaging bag for a microwave oven in which explosion of the bag caused by vapor generated in the bag by heating can be prevented even when the content sealed in the bag is heated or heat-cooked by using the microwave oven of high output, and the vapor is allowed to be smoothly released by automatically unsealing the bag. SOLUTION: A laminate for a packaging material comprises at least a heat- resistant base material layer and a sealant layer, and has a resin layer which is softened at high temperature to degrade the strength thereof provided on at least one area thereof, and the strength is sufficient at a low temperature between the heat-resistant base material layer and the sealant layer. The heat- resistant base material layer is formed of a film having the tensile breaking strength of >=25 N/cm, and the tensile breaking elongation of >=100%.