Therefore, it is widely used in the fields of high temperature difference resistance, information and communication. It has good dimensional stability at high temperature, low thermal shrinkage and good flatness after heating. Characteristics: high insulation strength, high voltage resistance, resistance to moisture, gas, high heat and chemical invasion; low shrinkage, not easy to embrittlement and wear resistance. It has stable size, straight and excellent tear strength, heat and cold resistance, moisture and water resistance, chemical corrosion resistance, and super insulation performance. It is widely used in the flexible circuit board of automobile instrument panel, motor slot, interphase, wedge, game machine, calculator, digital camera and household appliances, as well as the gasket, baffle, shielding and protection of computer peripheral equipment.