The material properties of vacuum packaging bags directly affect the storage life of food and its taste. Therefore, when choosing packaging, not only should the products being packaged be considered, but also the materials of the packaging should be paid attention to. Vacuum packaging bags are made of more than one material, and different materials have different properties. The material classifications of vacuum packaging bags are as follows:

1. PE material. Generally, PE material is suitable for use in a low-temperature environment, so it is suitable for products such as seafood that require preservation.

2. RCPP material. It is suitable for steaming and boiling in a high-temperature environment.

3. PA material. Usually, AP material is added to vacuum packaging bags, mainly to increase physical strength and puncture resistance.

4. AL aluminum foil. This material is mainly used to increase the barrier performance and block light, and it is generally contained in vacuum packaging bags.

5. Water-resistant PVA. This material is used to increase the barrier performance and form a high-barrier coating.

6. PET material. It has excellent physical and mechanical properties, creep resistance, fatigue resistance, abrasion resistance, and is not prone to deformation.

However, according to usage requirements, our vacuum packaging bags are combined using these materials, and the combinations are as follows:

1. PA + PE and PA + RCPP, which are resistant to low-temperature puncture and high-temperature puncture.

2. PET + PE and PET + RCPP, which are resistant to low-temperature friction and high-temperature friction.

There are also combinations of more than two materials:

3. PET + PA + PE

4. PA + AL + RCPP

5. PET + PA + AL + RCPP

6. PET + PA + PE

Combining according to usage requirements can better improve the performance of vacuum packaging bags. Vacuum packaging bags are very common in our daily lives and are generally used to package various cooked meats.