... friction. 4. Nonstick, self-lubrication properties. 5. Good chemical resistance. 6. Excellent anti-aging. 7. Hygienic and nontoxic 8. Lightweight. 9 ... , strap, cap, buffer, gear, pinion and small roller. 6,Chemical industry: pump impeller, pump housing, valve seats and valve gasket. 7,Medical, macromolecular ...