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. ETFE 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
Specifications
| 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 |
Disclosure: 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.