Plastics as a packaging material, its main characteristics are: low density, high specific strength, unit mass packaging volume and packaging area is larger; good chemical properties, good resistance to acid, alkali, oxidation and various organic solvent characteristics; easy molding , Low molding energy consumption, low processing cost; good transparency, easy colorability; good strength, impact resistance, easy to modify. Therefore, plastics have been made into flexible packaging, cans, bottles, barrels, boxes and other forms of packaging of various types of food, beverages, cosmetic products, and pharmaceuticals.