Polyimide is the polymer material has been industrialized in the highest resistantvarieties, due to the superior performance, so can be used as thin films,coatings, plastics, composites, adhesives, foam, fiber, membrane separation,liquid crystal orientation agent, photoresist is widely applied in the high-tech fields, known as the "expert to solve the problem".

Polyimide film is a new type of high temperature resistant organic polymer film, is composed of pyromellitic dianhydride (PMDA) and two amino two phenyl ether(ODA) in the two strong solvent dimethyl acetamide (DMAC) by polycondensationand cast film, after imidization and into. It is currently the world's performance ofthin film the best kind of insulating material, mechanical properties, electrical properties, chemical stability, radiation resistance, high resistance to high temperature and low temperature resistance performance (-269 ℃ to + 400 ℃).In 1959 America DuPont Co first synthesized aromatic polyimide, polyimide filmson 1962 (PI film), began production in 1965, the commodity brand KAPTON.China's 60 time end to small batch production of polyimide film, now has been widely used in various fields of aviation, navigation, spacecraft, rocket and missile, atomic energy, electrical and electronic industry