What material is the high-temperature steaming bag made of?

High temperature steaming bag is a composite plastic film bag that can undergo high-temperature steaming treatment, also known as "soft can", with the advantages of both can container and boiling water resistant plastic bag. Its production materials are diverse, usually involving multi-layer composite structures to ensure stability and functionality in high temperature and high pressure environments.

The materials for making high-temperature cooking bags mainly include the following:

1. Aluminum foil: Aluminum foil is one of the common materials in high-temperature cooking bags, mainly used for preventing light, moisture, and air leakage. The high barrier performance of aluminum foil can effectively protect food from external interference and oxidation. At the same time, aluminum foil also has high heat resistance and pressure resistance, and can withstand high-temperature cooking treatment.
2. Polyester (PET): Polyester film is commonly used as the outer layer of high-temperature cooking bags to strengthen them. Polyester film has excellent mechanical properties and chemical resistance, providing good physical protection and durability.
3. Polyolefin film (such as polypropylene PP): Polyolefin film is often used as the inner layer of high-temperature cooking bags and comes into direct contact with food. Polypropylene film has good heat resistance and pressure resistance, and can maintain stability in high temperature and high pressure environments. In addition, polypropylene film also has good resistance to oil and chemical corrosion, and is not easily corroded by oil and chemical substances in food.
4. Nylon: Nylon composite cooking bag is a cooking bag material with high strength and high heat resistance. Nylon film can maintain good toughness and strength in high temperature and high pressure environments, and is not easily deformed or broken. Meanwhile, nylon film also has good gas and water vapor barrier properties, which can effectively protect the quality and taste of food.

In addition, in recent years, PVDC (polyvinylidene chloride) laminated composite film has also been used as a high-performance food packaging material for the production of high-temperature cooking bags. PVDC plastic film has high barrier properties similar to aluminum foil and high temperature cooking resistance, making it an ideal high-temperature cooking resistant food packaging film.

When making high-temperature cooking bags, these materials are tightly bonded together through composite technology to form a multi-layer composite structure. Composite technologies include dry composite, solvent-free composite, and co extrusion composite, which ensure tight adhesion and stable performance between materials.