PVC decomposes into hydrogen chloride at high temperature. Among them, there are additives such as stabilizer lead salt and plasticizer dop. It is these two strict environmental protection requirements.
Polyester materials, additives pollution is relatively low, that is, low temperature resistance.
Many mineral water bottles are made of pet, which also shows their environmental protection. But we can't generalize.
Different origins. As a PET material, PET plastic was patented in 194 1, while PVC (polyvinyl chloride) was discovered by American V.Regnaud as early as 1835. When vinyl chloride is irradiated by sunlight, it will produce a white solid, namely polyvinyl chloride.
1. Different uses: PET plastics are suitable for electronic and electrical industries and automobile industries. Used for all kinds of coil formers, transformers, televisions, tape recorder parts and housings, automobile lamp holders, lampshades, incandescent lamp holders, relays, selenium rectifiers, etc. PVC (polyvinyl chloride) is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials and fibers.
2. Different properties: PET resin with general properties is ivory translucent or colorless transparent body, with a relative density of 1.38 and a light transmittance of 90%. PVC (polyvinyl chloride) is a white powder with amorphous structure and low branching degree, and its relative density is about 1.4.