Blister packaging sheet called hard or film, commonly used :PET (polyethylene terephthalate) hard, PVC (polyvinyl chloride) hard, PS (polystyrene) hard. PS hard sheet low density, poor toughness, easy to burn, burning will produce styrene gas (a harmful gas), so generally used to produce a variety of industrial plastic tray. PVC sheet toughness moderate, not easy to burn, burning will produce chlorine gas, certain impact on the environment, PVC easy thermal bonding, can be used sealing machine and high frequency machine sealing edge, is the main raw material for the production of transparent plastic products. PET plate good toughness, high transparency, easy burning, burning does not produce harmful gases, belong to the environmental protection material, but the price is high, suitable for high-end blister products, blister blister of European and American countries generally require the use of PET plate, but it is not easy to heat sealing, bring great difficulty to the package, in order to solve this problem, people to adopt a kind of call of PETG glycol modified - polyethylene terephthalate material, as well as the material of PVC the ease of MWCNTS, also has a PET high environmental protection and transparency, but the price higher.
