Is a material belonging to the group of high-performance thermoplasts. It has the best heat resistance among plastics with technical use. It also has very high chemical resistance. It is insoluble in all known solvents and resistant to weather conditions. It is characterized by the lowest coefficient of friction, as well as excellent insulation and the lowest dielectric coefficient. It is used in the construction of specialized equipment, in the construction of machines, pumps, in water installations, chemical installations, medicine, food industry, in thermal technology.