Retort pouch or microwave pouch with packaging material and packaging material

摘要

The packaging material includes at least a first stretched plastic film, a second stretched plastic film, and a sealant layer in this order from the outer surface side to the inner surface side. The stretched plastic film contained in the packaging material is only the first stretched plastic film and the second stretched plastic film. One of the first stretched plastic film or the second stretched plastic film is a high-stiffness polyester film, and the other of the first stretched plastic film or the second stretched plastic film contains polyester as a main component. The loop stiffness in one direction of the packaging material is 0.16 N or greater.