1. Polyethylene (PE): It has good moisture-proof performance and certain oxygen barrier performance, and is commonly used in packaging foods such as vegetables, fruits, and meats.

2. Polypropylene (PP): It has high transparency and good heat resistance and can be used in food packaging that requires heating or high-temperature sterilization, such as retort pouches and microwave heating food packaging.

3. Polyester (PET): It has high strength, good transparency, and excellent barrier properties and is commonly used in beverage bottles, food packaging films, etc.

4. Polyvinylidene chloride (PVDC): It has excellent oxygen and moisture barrier properties and is a high-performance food packaging material, commonly used in the packaging of meats, cheeses, hams, and other foods.