FPM is a highly fluorinated synthetic rubber, also known by its recent abbreviation FKM according to DIN / ISO and ASTM standards. It is cross-linked with bisphenol and therefore absolutely sulfur-free.
The specific features of this high-performance copolymer of vinylidene difluoride (VDF) and hexafluoropropylene (HFP) are above all its excellent chemical resistance beside high temperature resistance that allows long-term use at temperatures between -20° C and 200° C, in case of some qualities for short periods even up to +300° C. FPM is resistant to hydrolysis and thus also stable against hot water and steam, acids and alkalis. The fluorinated rubber is also unaffected by mineral oils, fuels, as well as aliphatic and aromatic hydrocarbons. Only halogenated solvents may cause more or less strong swelling of the fluoroelastomer.
The low gas permeability of FPM and its good resistance to ozone and oxygen are remarkable, so that the synthetic rubber is also highly weather-resistant. Finally, the high non-flammability of this high-tech material, which is classified in fire class V0 according to the fire standards UL 94, should be emphasised.
RCT Reichelt Chemietechnik has FPM foils and plates with shore hardnesses A between 70° and 75° in stock for demanding application areas in chemical-technical pilot plant and apparatus construction. The black colored, heavy fluorinated rubber with its density about 1.9 g/cm3 is electrically practically nonconductive and is the material of choice particularly for high-performance pressure seals, vapor and gas barriers, as well as for chemically and thermally stressed insulations.
Also available are FPM composite plates for special tasks, on one side with PTFE coated fluorinated rubber plates. The individual chemical-technical properties of both fluoroplastics interact synergistically.
The whole range of FPM/FKM foils and plates is represented in detail in our handbook THOMAPLAST® II (Semi-finished products). This and all further handbooks you can order free of charge at any time.