What are FKM and FFKM?

FKM is fluororubber, which refers to a synthetic polymer elastomer with fluorine atoms in its main chain or side chain carbon atoms. The introduction of fluorine atoms gives rubber excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance.

FFKM is perfluoroether rubber, which refers to the terpolymer of perfluoro (methyl vinyl) ether, tetrafluoroethylene and perfluoroalkene ether. Also known as perfluororubber. The long-term efficacy of perfluoroether rubber seals can improve production efficiency and reduce maintenance costs.

Extended data:

Advantages of fluororubber:

1, excellent high temperature resistance: the temperature range is -60 to +250. Excellent oil resistance: the oil resistance of high-temperature fuel oil, sulfur-containing lubricating oil, hydraulic oil, diester oil, silicate ester and other oils is better than other rubbers.

2. Excellent resistance to strong corrosive medium and strong oxidant; The stability of strong corrosive media such as fuming nitric acid, concentrated sulfuric acid, hydrochloric acid, hydrogen peroxide and concentrated alkali is better than other rubbers.

3. Good mechanical properties, electrical insulation and radiation resistance.

4. Good high vacuum tolerance.

Baidu encyclopedia-fluororubber

Baidu encyclopedia-perfluoroether rubber