TEFZEL® (ETFE – ETHYLENE TETRAFLUOROETHYLENE)

TEFZEL® (ETFE – ETHYLENE TETRAFLUOROETHYLENE)

Material Information

Tefzel® is DuPont’s brand name for the material called ETFE (Ethylene TetraFluoroEthylene). ETFE belongs to the fluoropolymer family. Fluoropolymers in general are known to have high chemical resistance, a wide range of operating temperatures, resistance to weathering, low friction, and electrical and thermal insulation. EFTE in particular was produced to offer a material that provides both corrosion resistance and mechanical strength over a wide temperature range. Tefzel® ETFE offers high purity, high impact strength, excellent chemical and abrasion resistance, good resistance to permeability, and resistance to radiation and heat sterilization. These properties are true for Tefzel® ETFE over a wide range of temperatures (-300 to 300º F). Tefzel® ETFE is available in the form of sheet, rod, and film.

Application

  • Pump housings and pipe linings
  • Wire and cables
  • Cryogenic applications
  • Valves
  • Compressors
  • Impellers for abrasive slurries
  • Films
  • Electrical components
  • Gaskets
  • Bearings
  • Fluid handling or chemical processing equipment
  • Wet bench equipment
  • Military/defense equipment components

Properties

  • Excellent chemical and abrasion resistance
  • High purity
  • High impact strength
  • Excellent dielectric insulation properties
  • Wide range of operating temperatures
  • Weathering and corrosion resistance
  • Very low moisture absorption
  • Resistance to radiation and heat sterilization
  • Low friction
  • Good thermal insulator

Physical

Astm Test Method

ETFE (Tefzel®)

Density (lb/in^3) D792 0.061
Specific Gravity D792 1.7
Water Absorption @ 24 hours (%) D570  -

Mechanical

Tensile Strength (PSI) D638 6,100
Tensile Modulus (PSI) D638 -
Tensile Elongation at Break (%) D638 300
Flexural Strength (PSI) D790 -
Flexural Modulus (PSI) D790 145,000
Compressive Strength (PSI) D695 2,470
Compressive Modulus (PSI) D695 -
Izod Impact (Notched), ft-lb/in D256 No Break
Shore D Hardness D785 D67

Thermal

Coefficient of Thermal Expansion,
10^-5/°F
D696 7.3
Heat Deflection Temperature 264 psi, ºF D648 -
Melting Point, °F D3418 512
Continous Service Temp (Operating), °F - 311
Thermal Conductivity, BTU-in/hr-ft² °F F433 -
Flammability Rating UL94 VO

Electrical

Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149 1,800
Volume Resistivity (ohm/square) D257 10^17
Dielectric Constant at 1 MHZ D150 2.5
Dissipation Factor at 1 MHZ D150 0.006

NOTE:

The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.