Properties & Technical Data

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.