TEFLON PROPERTIES : THERMAL |
Properties | ASTM | PTFE | PFA | FEP | ETFE | ECTFE |
Maximum Service Temp. | °C | 260° | 260° | 200° | 150° | 170° |
°F | 500° | 500° | 392° | 302° | 340° |
Melting point | °C | 327° | 305° | 260° | 267° | 240° |
°F | 621° | 582° | 500° | 512° | 464° |
Flame Rating | UL 94 | V-O | V-O | V-O | V-O | V-O |
Minimum Service Temp. | °C | -240° | -200° | -240° | -190° | -76° |
°F | -400° | -328° | -400° | -310° | -104° |
| | PTFE | PFA | FEP | ETFE | ECTFE |
| | | | | | |
TEFLON PROPERTIES : MECHANICAL |
Properties | Units | PTFE | PFA | FEP | ETFE | ECTFE |
Specific Gravity | D-792 | 2.18 | 2.15 | 2.15 | 1.74 | 1.68 |
Tensile Strength (psi) | D-638 | 2,000-7,000 | 4,000-4,500 | 2,800-5,000 | 6,100-6,800 | 6,000-7,800 |
Flexural Strength (psi) | D-790 | no break | no break | no break | 5,500 | 7,000 |
Compressive Strength | D-695 | 3,500 | | 2,200 | 2,500 | 1,276-1,711 |
Flex Life | D-2176 | greater then 1,000,000 | 10,000 up to 500,000 | 5,000 up to 80,000 | 10,000 up to 27,000 | N/A |
Hardness Durometer Shore D | D-636 | D 50-65 | D 55-60 | D 55 | D 75 | D 75-90 |
Coefficient of Friction | On Steel | .02 | .04 | .04 | .06 | .19 |
Abrasion Resistance | Taber | 12 | 9-17 | 14-20 | N/A | .005 |
| | PTFE | PFA | FEP | ETFE | ECTFE |
| | | | | | |
TEFLON PROPERTIES : ELECTRICAL |
Properties | Units | PTFE | PFA | FEP | ETFE | ECTFE |
Dielectric Constant | D150 / 103Hz | 2.1 | 2.1 | 2.1 | 2.6 | 2.5 |
D150 / 106Hz | 2.1 | 2.1 | 2.1 | 2.6 | 2.6 |
Dielectric Strength 10 mil Film | D-149 | >1,400 | >2,000 | >2,000 | 1,600 | N/A |
Volume Resistivity ohm-cm | D-257 | >1,018 | >1,018 | >1,018 | >1,016 | >1,016 |
Surface Resistivity ohm-cm | D-257 | >1,017 | >1,017 | >1,017 | >1,015 | >1,014 |
| | PTFE | PFA | FEP | ETFE | ECTFE |
| | | | | | |
TEFLON PROPERTIES : GENERAL |
Properties | Unit | PTFE | PFA | FEP | ETFE | ECTFE |
Chemical- Solvent Resistance | D-543 | Excellent | Excellent | Excellent | Excellent | Excellent |
Water Absorption | 24hr / % | <.01 | <.03 | <.01 | <.03 | <.01 |
Refractive Index | | 1.35 | 1.34 | 1.338 | 1.4 | 1.447 |
Limiting Oxygen Index | D-2863 | > 95 min | 95 min | 95 min | 30-46 min | 52 min |
| | PTFE | PFA | FEP | ETFE | ECTFE |