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A. The thickness of ordinary thin blister is 0.14-5.0mm, which is mainly made of PVC, PP, PS (HIPS), pet (including APET and PETG), PE, BOPS and recyclable paper holder. It is widely used in food, medicine, electronics, toys, computers, daily necessities, cosmetics, etc Products and mechanical hardware and other industries. B. The thickness of special thick blister is 0.14-8.0mm, which is mainly injection molded products with PVC, PP, PS (HIPS), pet (including APET and PETG), ABS, PC, PE and PMMA and other materials and effects. The main products are refrigerator liner, advertising light box, commodity display frame, pet cage chassis, rear shell of rear projection TV and various mechanical panels, which can replace injection molded products It has the characteristics of low mold cost (only 1 / 20 of injection mold), short production cycle and short mold development time (generally only 3-5 days) The reason why we don't classify the types of materials is that there are some differences between ordinary thin blister and special thick blister, but PVC, PP, PS and pet occupy a place in these two types of Blister products, which can be called the "Four Heavenly Kings" of the family of Blister products! PVC hard disk has moderate toughness and is not easy to burn. When it burns, it will produce chlorine gas, which will have a certain impact on the environment. PVC is easy to heat close. It can be sealed by sealing machine and high-frequency machine. It is the main raw material for the production of transparent Blister products. PS hard disk has low density, poor toughness and is easy to burn. When it is burned, styrene gas (harmful gas) will be produced, so it is generally used to produce various industrial plastic pallet. Pet hard disk has good toughness, high transparency, easy to burn, and does not produce harmful gases when burning. It belongs to environmental protection materials, but its price is high, so it is suitable for making high-grade Blister products. Generally, pet hard disk is required for blister shell in European and American countries, but it is not easy to heat up, which brings great difficulties to packaging. In order to solve this problem, people compound a layer of PVC film on the surface of pet, named PETG hard disk, But the price is higher