Advantages 1. Thermal deformation temperature and long-term service temperature are the highest among thermoplastic general engineering plastics. 2. Because of its high heat resistance, reinforced PET is immersed in solder bath at 250°C for 10 second, and hardly deforms or discolors. It is especially suitable for preparing electronic and electrical components for welding. 3. The bending strength is 200MPa, the elastic modulus is 4000MPa, the creep resistance and fatigue resistance are also good, and the surface is hard. Height, mechanical properties similar to thermosetting plastics. 4. Because ethylene glycol used in PET production is almost half cheaper than butanediol used in PBT production, PET and reinforced PET have the lowest price and high cost performance among engineering plastics. The main disadvantage of inferior pet sheet is its high notch sensitivity. Excellent chemical resistance, not in contact with aqueous solution of alcohol, ether, aliphatic hydrocarbon, acid and salt, but not in contact with strong acid and alkali. Carbon tetrachloride resistance, swelling in dichloroethane, slightly swelling in aromatic hydrocarbon and acetic acid.