ETFE Ethylene-Tetrafluoroethylene ETFE is a copolymer, made of the monomers ethylene  (ethene) and tetrafluorethylene (tetrafluorethene). Thus, ETFE amongs to the fluoropolymers Manufacturing The production of ETFE can be devided in 3 parts: 1. polymerisation 2. granulation 3. extrusion/ sintering The copolymer ETFE consits of about 75% tetrafluoroethylene and 25% ethylene. • Calcium fluoroide CaF₂ will be blend with chloroform CHCl₃ and hydrogen sulfate [HSO₄]- → chlorodifluoromethane CHClF₂ • chlorodifluoromethane by pyrolysis → tetrafluoroethylene (C₂F₄) • tetrafluoroethylene + ethene → ETFE ([C₄F₈H₈]_n) Properties Overview name ethylene-tetrafluoroethylene classification - copolymer - thermoplastic Manufacturing monomers - tetrafluoroethene C₂F₄ - ethene C₂H₄ production   - pyrolysis of chloroform    - polymerisation Properties aggregate state solid general - good puncture resistance - good tensile strength at break - excellent weather stability - excellent UV-consistence - high chemical resistance - wide temperature range of applicability - hardly inflammable Mechanical density 1,7 g/cm³ hardness D-70 tensile strength ~ 40 MPa breaking elongation 300 % friction coefficient 0,4 Electrical dielectric constant 2,6 (10³ - 10⁶ Hz) specific resistance   > 10⁷ Ω * mm dielectric strength 65-90 kV/mm Thermal melting temperature 270 °C heat capacity heat conductivity combustion heat   12 MJ/kg operation temperature max. 160 °C Optical refractive index Application • in form of foils and membrane pillows for building industry • → greenhouses, sport stadiums (Allianz- Arena in Munich), notatoriums, and more... • separating foil for composite materials • protection layer for solar cells Copyright © 2010 polyneub.com  - Matthias Neuber - about  - general terms and conditions Manufacturer Service Provider