What plastic sheets are commonly used in plastic packaging?

The sheet used for plastic absorption packaging is called hard film or film. The commonly used ones are: PET (polyethylene terephthalate) hard film, PVC (polyvinyl chloride) hard film and PS (polystyrene) hard film. PS hard sheet has low density, poor toughness, easy to burn, and will produce styrene gas (harmful gas) when burning, so it is generally used to produce all kinds of industrial plastic-absorbing pallets. PVC hard sheet has moderate toughness and is not easy to burn. It will produce chlorine gas when burning, which will affect the environment. PVC is easy to heat up. It can be sealed by sealing machine and high frequency machine. It is the main raw material for producing transparent plastic-absorbing products.
PET hard sheet has good toughness, high transparency, flammability, no harmful gas when burning. It belongs to environmental protection material, but its price is high, and it is suitable for making high-grade plastic absorption products. In Europe and the United States, it is generally required to use PET hard sheet for plastic absorption foam shell, but it is not easy to heat, which brings great difficulties to packaging. In order to solve this problem, people adopt a modified polyethylene terephthalate called PETG ethylene glycol. Diethanol ester material, this material not only has the thermal bonding of PVC, but also has the high environmental protection and transparency of PET, but the price is higher.