The hard sheet can also be called the film, it is a common material used for blister, if the thickness of the hard sheet is more than 2 mm then it is also called plate, there are common plates are PET (polyethylene terephthalate) hard sheet, PVC (polyvinyl chloride) hard sheet, Ps (polystyrene) hard sheet, abs (rubber products).
Ps hard sheet is relatively low density, has poor flexibility, easy to extinguish, when extinguished, causing styrene gas (a toxic gas), so it is generally used to make a variety of industrial-grade blister pallets.
PVC hard sheet is relatively moderate flexibility, not easy to extinguish, when extinguished, resulting in chlorine gas, the natural environment will also produce certain hazards, PVC easy to hot melt, can use an automatic sealing machine and high-frequency machine edging is an important raw material for the consumption of transparent body suction plastic products.
PET hard sheet is good flexibility, high transparency, easy to extinguish, extinguish without causing toxic gas, belong to environmental protection information, but the price is high, suitable for making good suction plastic products, the United States and Europe and other countries blister generally require the use of PET hard sheet, but it is not easy to hot melt, to the sealing caused very big difficulties, in order to deal with this problem, we add a layer of PVC film on the surface of PET, named PETG hard sheet. The name is PETG hard sheet, but the price is a little higher.