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Development of fluorinated TPV materials and their applications
von Dr. Edward H. Park
Freudenberg-NOK General Partnership (FNGP) has developed novel and unique fluorine containing thermoplastic vulcanisate compositions (FKM-TPV: FluoroXprene) comprising of a continuous thermoplastic fluorocarbon resin matrix phase and a dispersed amorphous vulcanised fluorine containing elastomer phase. They are useful as a melt formable and easier to process material with rubber elasticity. The new fluorinated TPV has excellent material properties including outstanding temperature resistance, superior fluid and fuel resistances, and extremely low fuel permeability compared with standard
FKM thermoset elastomers.
The typical deficiencies of traditional TPVs, such as high compression set, narrow continuous service temperature range, and poor fluid resistance against harsh chemicals, have been overcome with FluoroXprene. Post treatment technique has been developed to enhance the various properties further. Morphology, rheological properties, compression set, mechanical properties, heat resistance, fluid resistance, and permeability of FKM-TPV materials are measured and compared with FKM thermoset elastomers. The typical compounding and processing techniques for FluoroXprene materials are described to fabricate dynamic and static seals for automotive, chemical, and general industry applications where extreme high and low temperatures and harsh chemical environments are common.