Selection Guide
| TYPICAL PROPERTIES OF SELECTED FLUOROPOLYMERS | ||||
| ASTM or UL test | Property | PTFE (unfilled) | FEP | PFA |
| PHYSICAL | ||||
| D792 | Density (lb/in3) (g/cm3) | 0.078 2.16 | 0.078 2.16 | 0.078 2.15 |
| D570 | Water Absorption, 24 hrs (%) | < 0.01 | < 0.01 | < 0.03 |
| MECHANICAL | ||||
| D638 | Tensile Strength (psi) | 3,900 | 3,400 | 3,600 |
| D638 | Tensile Elongation at Break (%) | 300 | 325 | 300 |
| D790 | Flexural Strength (psi) | No break | No break | No break |
| D2176 | Folding Endurance (cycles) | 106 | 5-80 x 103 | 50-500 x 103 |
| D790 | Flexural Modulus (psi) | 72,000 | 85,000 | 85,000 |
| D785 | Hardness, Shore D | D50 | D56 | D60 |
| D256 | IZOD Notched Impact (ft-lb/in) | 3.5 | - | - |
| THERMAL | ||||
| D3418 | Melting Temp (°F / °C) | 635 / 335 | 500 / 260 | 582 / 305 |
| - | Max Operating Temp (°F / °C) | 500 / 260 | 400 / 204 | 500 / 260 |
| UL94 | Flammability Rating | V-0 | V-0 | V-0 |
| ELECTRICAL | ||||
| D150 | Dielectric Constant at 1 MHz | 2.1 | 2.1 | 2.1 |
| D150 | Dissipation Factor at 1 MHz | 0.0002 | 0.0007 | 0.0001 |
| D495 | Arc Resistance (sec) | 300 | 300 | 180 |
| D257 | Volume Resistivity (ohm-cm)at 50% RH | 1018 | 1018 | 1018 |
