PES (polyether sulfone resin) is a transparent amber amorphous resin. It has excellent heat resistance, good dimensional stability, and good chemical resistance. In addition, PES shows excellent reliability for rapid temperature changes, and has good reliability in long-term use at high temperature. PES is widely used because of its excellent formability and excellent properties. The heat: the heat distortion temperature at 200 ~ 220 DEG C, continuous use temperature is 180 to 200 DEG UL DEG C temperature index 180.