High-temperature cooking film is a film product under the category of CPP protective film. In short, it is a film material that can withstand steaming or boiling together with food and other materials. It can withstand high temperature, and does not emit harmful gas at high temperature, and is an environmentally friendly thin film material. This film has good results in the food industry.

High-temperature cooking film is a composite plastic film bag that can be heat-treated. It has the advantages of both canned containers and boiling water-resistant plastic bags, so it is considered a "soft can". The retort bag is mostly made of three layers of materials. The typical structure of the retort bag is that the outer layer is polyester film for reinforcement, the middle layer is aluminum foil, which is used to prevent light, moisture and air leakage; the inner layer is polyolefin film , for heat sealing and contact with food.