The heat resistance of pure PET is not high, the heat deflec-tion temperature is only about 85°C, but it is greatlyimproved after reinforced treatment. After glass fiberreinforced PET mechanical properties similar to PC, PA andother engineering plastics, heat deflection temperature canreach 225 °C; PET heat aging resistance is good, the embrit-tlement temperature of -70 ·C, at -30C still has a certaintoughness; PET is not easy to burn, the flame is yellowburning oil drops.
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