FEP Fluoroethylenepropylene FEP is a copolymer, made of the monomers  tetrafluoroethylene and haxafluoropropylene. Thereby the mixing ratio amount 86% for tetrafluoroethylene and  according 14% for the hexafluoropropylene. Thus, FEP  amongs to the fluoropolymers. FEP is combined with the polymers PTFE (polytetrafluoroethylene) and PFE  (perfluoroalkoxy) under the genus teflon. FEP is an advancement of PTFE and was first sold in 1960 on the free market. The mechanical properties are equal to these of PTFE, but with higher strength. Properties Overview name fluoroethylenepropylene classification - copolymer - thermoplastic Manufacturing monomers - polytetrafluoroethyleno (PTFE) C₂F₄ - hexafluoropropylene C₃F₆ Properties aggregate state solid general - very equal to PTFE - high temperature stability - excellent non-sticking properties - excellent UV-resistance - high chemical resistance - wide temperature range of applicability - high transparency - flame-retardant -excellent dielectric isolation Mechanical density 2,15 g/cm³ hardness D-55 tensile strength ~ 25 MPa breaking elongation 300 % friction coefficient 0,2 Electrical dielectric constant 2,1 (10³ - 10⁶ Hz) specific resistance   > 10⁷ Ω * mm dielectric strength 40-75 kV/mm Thermal melting temperature 270 °C heat capacity heat conductivity combustion heat   5 MJ/kg operation temperature max. 200 °C Optical refractive index Application • basically for the coating of materials for anti-sticking coatings • due to the less roughness of FEP in compare to PTFE, FEP comes in operation if more clean surfaces are necessary Copyright © 2010 polyneub.com  - Matthias Neuber - about  - general terms and conditions Manufacturer Service Provider