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| Mechanical Property | ASTM | Unit | PTFE | FEP | PFA | ETFE | PVDF | ECTFE | Polyimide |
|---|---|---|---|---|---|---|---|---|---|
| Coeffecient of Friction | D 1894 | <3m/min | 0.1 | 0.2 | 0.2 | 0.23 | 0.48 | ||
| Specific Gravity | D 792 | 2.13-2.22 | 2.15 | 2.15 | 1.70-1.78 | 1.76 | 1.68 | ||
| Tensile Strength | D1457 | Mpa | 21-35 | 23 | 25 | 40-47 | 231 | ||
| D1708 | psi | 3k-5k | 3400 | 3600 | 5.8k-6.7k | 4500 | 6000 | 33,500 | |
| Elongation | D1457 | % | 300-500 | 325 | 300 | 150-300 | 50 | 200 | 72 |
| D638 | |||||||||
| Flexural Modulus | D790 | Mpa | 500 | 600 | 600 | 1000 | |||
| psi | 72,000 | 85,000 | 85,000 | 145,000 | 240×103 | ||||
| Folding Endurance | D2176 | cycles | >106 | 5-80×103 | 10-500×103 | 10-27×103 | 285 | ||
| Impact Strength | D256 | J/m | 189 | No | No | No | No | 78 | |
| (ft.lb/in) | -4 | Break | Break | Break | 3.8 | Break | 0.58 | ||
| Hardness | D2240 | Shore D | 50-65 | 56 | 60 | 63-72 | 80 | 75 | |
| Water Absorption | D570 | % | <0.01 | <0.01 | <0.03 | <0.03 | 0.04 | <0.01 | 2.8 |
| Thermal Property | ASTM | Unit | PTFE | FEP | PFA | ETFE | PVDF | ECTFE | Polyimide |
|---|---|---|---|---|---|---|---|---|---|
| Melting Point | D3418 | C | 327 | 260 | 305 | 245-280 | 220-227 | 220-227 | None |
| F | 621 | 500 | 582 | 473-536 | 428-441 | 428-441 | |||
| Upper Service Temp | UL746B | C | 260 | 204 | 260 | 155 | 160 | 135 | 400 |
| F | 500 | 400 | 500 | 311 | 320 | 275 | 752 | ||
| Coeff Thermal Expansion | 10E-5 per F | 8 | 8 | ||||||
| Coeff Thermal Conductivity | Btu-in.hr-ft2-F | 1.35 | 1.65 | 1.2 | 1.1 | ||||
| Flame Rating | UL94 | VO | VO | VO | VO | VO | VO | VO | |
| Limiting Oxygen Index | D2863 | % | >95 | >95 | >95 | 30-36 | 52-64 | 37 | |
| Heat of Combustion | D240 | MJ/kg | 5.1 | 5.1 | 5.3 | 13.7 | |||
| (Btu/lb) | 2,200 | 2,200 | 2,300 | 5,900 |
| Electrical Property | ASTM | Unit | PTFE | FEP | PFA | ETFE | PVDF | ECTFE | Polyimide |
|---|---|---|---|---|---|---|---|---|---|
| Dielectric Strength | D149 | (v/mil) | 450 | 1000 | 2000 | 1280 | 7700 | ||
| Dielectric Constant | D150 | 1MHz | 2.1 | 2.1 | 2.1 | 2.6 | 2.5 | 3.4 | |
| Dissipation Factor | D150 | 1MHz | <0.0001 | 0.0006 | 0.0001 | 0.009 | 0.0018 | ||
| Arc Resistance | D495 | sec | >300 | >300 | >180 | 122 | |||
| Volume resistivity | D257 | ohm.cm | >1018 | >1018 | >1018 | >1017 | 105 | 1.5×1017 | |
| Surface resistivity | D257 | ohm.cm | >1018 | >1016 | >1017 | >1015 |
To our belief, the information contained herein is an accurate representation of the data available on the date of this publication. American Duarfilm® makes no warranties, expressed or implied, or accepts any liability in connection with this information or its use. This information is for the use of technically skilled persons at their own discretion and American Durafilm® makes no claims as to the actual performance characteristics of any material(s)s listed herein when employed under any end use condition(s). Nothing herein is to be taken as a license to operate under or a recommendation to infringe any patents.
