Compound: FKM

Description: The organic compounds highly fluorinated are characterized by elevated chemical resistance, comparable to the politetrafluoroetilene homopolymer. Its elevated cristallinity makes it more similar to a plastic subject than to an elastomer.

Some copolimeris of the perfluoropropene have mechanical characteristics, good resistance to temperatures (inferior only to the silicone rubbers) and above all they resist against chemical aggressions and aromatic hydrocarbons. The resistance is not good towards polar solvents (acetone etc). This rubbers kind is normally used in particularly aggressive environments as athmospheres rich of oxygen or oxidizing. Some of these polymers need a process of vulcanization different from the thermic one.

This kind of polymer is generally very expensive and dedicated to particular applications. Historically the first fluorinated elastomer has been produced by DuPont. It deals with a terpolimero TFE HFP VDF whose name is VITON. 

 

Temperature of exercise: between the -20°C and the 200°C 

 

Chemical resistance: Good resistance to the flames, high temperatures, aromatic hydrocarbons, chemical substances and chlorinated solvents.

 

 Field of application: highly qualified technical items for  mechanical industry, oil, chemistry, pharmaceutics, aeronautics and nuclear industry.

 

 Hardness: Between  55 and 80 Shores.