The polyimide products are the insulation material of high-grade insulation in the world now with very high heat-durability and heat-stability. Under temperature between -200°C and +260°C, they have outstanding mechanical performance, electric insulation, radiation resistance, hard-volatility under vacuum, and corrosion resistance (other than alkali) and so on. They now have been widely applied in the fields of electronics, electrical appliances, energy and transportation, aerospace technology and national defense etc. The polyimide films and their products of this company are produced with the "Bidirectional stretch" process of special model equipment introduced from American BBS Company which are in the leading level in our country and all performances of the products are better than the similar products produced by other technical processes.These products have been introduced into the international market, we have exported our products (the polyimide films and their products include: films, strips, polyimide films, tape F46,tape PTFE and polyimide films, hot-set pressure-sensitive tape etc.)to Korea Taiwan Singapore USA Russia India England Japan Tailand Hongkong etc.