Blister tray-the material of the blister tray
　　1, PVC material
　　 This kind of material has high toughness and is not easy to burn. It will produce chlorine during combustion, which will affect the environment to a certain extent. PVC is easy to heat and seal. It can be sealed with a sealing machine and high-frequency edge sealing. It is the main raw material for the production of transparent blister products.
　　 Features: Mainly high transparency, good surface gloss, less crystal points, small water lines, wide use, strong impact resistance, and easy to shape.
　　Application range: Widely used in the outer packaging of toys, food, electronic products, medicine, electrical appliances, gifts, cosmetics, stationery and other products.
　　2, PET material
　　 This kind of material has good toughness and is a new type of material developed in recent years. With its excellent toughness, high strength, high transparency, and recyclability, it is easy to burn and does not produce harmful gas when burned. It is an environmentally friendly material and gradually banned PVC, but the price is high. It is suitable for high-end blister products. The blister shells in European and American countries generally require PET materials, but their thermal melting point is relatively high, which brings great difficulties to high-frequency packaging.
　　 Features:
　　 good toughness, high strength, high transparency, and recyclable, easy to burn, no harmful gas generated during combustion
　　 Application range:
　　 Generally, this material is environmentally friendly and healthy, and it is not easy to produce toxic items, so it is widely used in food blister trays, pastry boxes, cake boxes and other products. Anyone who is in direct contact with food will generally use this material, which is non-toxic, environmentally friendly and healthy.
　　3, PS material
　　This kind of material has low density, poor toughness, and is easy to burn. It will produce styrene gas (a harmful gas) when burned, so it is generally used to produce various industrial blister trays. PS sheet is a new type of environmentally friendly packaging material developed in recent years, with its excellent thermoforming performance, good environmental performance and sanitary performance.
　　 Features: low density, poor toughness, easy to burn.
　　Application range: widely used in medicine, food, toys, electronics.
　　4, PETG material
　　 In order to solve the problem of higher thermal melting point of PET materials, people compound a layer of PVC film on the surface of PET, named PETG, but the price is higher.
　　 Features:
　　A, with excellent transparency and smoothness, good display effect.
　　B. Excellent surface decoration performance, can be printed without surface treatment, easy to suppress patterns, easy to metal processing (vacuum metal coating)
　　C, has good mechanical strength.
　　D, good barrier performance to oxygen and water vapor.
　　E, good chemical resistance, can withstand the erosion of a variety of chemical substances.
　　F, non-toxic, reliable hygienic performance, can be used to package food, medicine and medical equipment, and can be Y-ray [span] to sterilize the packaged items.
　　G. It has good adaptability to environmental protection and can be recycled economically and conveniently; when its waste is incinerated, no harmful substances harmful to the environment are produced. Such sheets are considered to be an ideal packaging material that meets the (ROSH) environmental protection requirements.
　　Application range: Mainly used in electronics, food, toys, color box windows, collar holders, shoe packaging, etc.
　　5, PP material
This material is made of polypropylene resin as the main raw material, added with various process color masterbatches, toughening agents and brighteners, and is made through processes such as mixing, plasticizing extrusion, three-roll calendering, cooling, traction and winding. .
　　Features: PP blister has: environmental protection, beautiful appearance, silk-screen printing, Ke-printing, hot stamping, high temperature resistance, low temperature resistance, high transparency, flexion resistance, products meet food testing standards (not required), and microwaveable.
　　Advantages: PP sheet has the characteristics of non-toxic, odorless, hygienic, high mechanical strength and good barrier properties, and can be used for packaging in industries, agriculture, fruit and other industries. The surface of the tray made of PP anti-skid sheet is smooth and beautiful, which is very popular among users.
　　 Disadvantages: low dimensional accuracy, insufficient rigidity, poor weather resistance, easy to produce "copper damage", it has post-shrinkage phenomenon, after demolding, it is easy to age, become brittle, and easy to deform.
　　Application range: PP sheet is also suitable for packaging of highly cold-resistant frozen foods, such as ice cream boxes, dumpling boxes, glutinous rice balls boxes, etc.