Materials and Tools
Tefzel® ETFE (Ethylene TetrafluoroEthylene)
Tefzel® is a molecular relative of PTFE, and as such, is highly chemically resistant. It has proven to be an excellent material for sealing surfaces and for applications where aggressive solvents are being used and durable tubing is necessary for the application. Tefzel is also used for threaded products, particularly in our low pressure line of products and adapters. Please note that caution must be taken when using some chlorinated solvents with Tefzel, as they may interact and degrade or swell the polymer slightly.
| Temperature Range | up to 80 °C |
|---|---|
| Thread Strength | Good |
| Oxygen Permeability | 100cc / 100in2 * 24h * atm / mil @ 25 °C |
| pH Range | 0 - 14 |
| Sterilization Techniques | Ethylene oxide |
| Autoclavable? | Y |
Tefzel ETFE (Ethylene TetrafluoroEthylene) Extended Properties
| General | Test Method | Units | ||
|---|---|---|---|---|
| Water Absorption | 24 hr. | ASTM D570 | % | 0.007 |
| Weather and Chemical Resistance | - | - | Excellent | |
| Limiting Oxygen Index | ASTM D2863 | % | 30-32 | |
| Bulk Density | DuPont | g/L | 1,300 | |
| Flame Rating | UL 94 | - | V-0 | |
| Mechanical | Test Method | Units | ||
| Tensile Strength | 23 °C (73 °F) | ASTM D638 | MPa(psi) | 40(6,000) |
| Specific Gravity | ASTM D792 | - | 1.7 | |
| Ultimate Elongation | 23 °C (73 °F) | ASTM D638 | % | 300 |
| Flexural Modulus | 23 °C (73 °F) | ASTM D790 | MPa(psi) | 1,000(145,000) |
| Impact Strength | 23 °C(73 °F) | ASTM D256 | J/m(ft-lb/in) | No Break |
| Compressive Strength | ASTM D695 | MPa(psi) | 38(5,500) | |
| Linear Coefficient of Expansion | 0-100 °C 32-212 °F |
ASTM D696 ASTM D696 |
mm/mm/ °C in/in/ °F |
12.6 x 10-5 7.0 x 10-5 |
| Thermal | Test Method | Units | ||
| Nominal Melting Point | ASTM D3418 | °C (°F) | 255-280(491-536) | |
| Flow Rate | ASTM D3159 | g/10 min | 11 | |
| Upper Service Temperature | UL746 | °C (°F) | 155(311) | |
| Electrical | Test Method | Units | ||
| Dielectric Strength | 0.25 mm (0.010 in) | ASTM D149 | kV/mm (V/0.001mil) | 70(1,800) |
| Dielectric Constant | 1 MHz, 23 °C(73 °F) | ASTM D1531 | - | 2.5-2.6 |
| Dissipation Factor | 1 MHz, 23 °C(73 °F) | ASTM D1531 | - | 0.0054 |
| Volume Resistivity | ASTM D257 | Tohm-m (ohm-cm) | 1x103 (1x1017) |