Fluorocarbon (FKM / FPM)
Fluorocarbon (FKM/FPM) is a well-known rubber with high performance and a copolymer composed of highly fluorinated hydrocarbons. It shows excellent resistance to high temperature, fuel oil, hydraulic oil, ozone, media and aging. However, it is unstable to polar solvent, such as MEK, acetone and ethyl acetate. The parts made with FKM generally refer to the fluorocarbon contented with 66% of fluorine. FKM is used at temperature between -25°C~200°C for long term operation. The instantaneous temperature can reach 250°C, however, the life time of rubber will be shorten.
Advantage
- Excellent resistance to most oil and media
- Great resistance to hydrocarbon and chlorinated hydrocarbon
- Great resistance to heat at 250°C
- Great resistance to acid (inorganic acid)
Disadvantage
- Poor tensile and tearing in heat
- High compression in hot water
- Not applicable to polar solvent
- Poor extension and poor resistance to cold