PTFE(polytetrafluoroethylene) is the best chemical resistance platic. It has the lowest coefficient of friction of all known solid materials and a wide range of working temperature from -180�� to 260��. Features: 1. Resistance to chemical corrosion. 2. Resistance to aging. 3. Low friction coefficient. 4. Good dielectric Property. 5. Self-cleaning property. 6. Waterproof. Type Thickness (mm) Thickness Tolerance Width (mm) Width Tolerance Length(M) Oriented 0.015 -0.040 10% 30 110 0.3 50 Semi-oriented 0.030 C 0.100 10% 30 90 0.3 100 Non-oriented 0.020 C 0.500 10% 30 300 2.0 50. PE film and Paper carton.