Physical Properties of TEFLON® FEP Film
TEFLON®/TEFZEL® Films and Products
| Property | Test Method | Typical Value (a) | |
|---|---|---|---|
| SI Units | English Units | ||
| Tensile Strength at Break | ASTM D-882 | 21 N/mm2 | 3000 psi |
| Elongation at Break | ASTM D-882 | 300% | |
| Yield Point | ASTM D-882 | 12 MPa | 1700 psi |
| Elastic Modulus | ASTM D-882 | 480 MPa | 70,000 psi |
| Impact Strength | DuPont pneumatic impact tester | 7.7 x 103 J/m | 144 ft-lb/in |
| Folding Endurance (MIT) | ASTM D-2176 | 10,000 cycles | |
| Tear Strength-Initial (Graves) | ASTM D-1004 | 2.65 N | 270 g force |
| Tear Strength-Propagating (Elmendorf) | ASTM D-1922 | 1.23 N | 125 g |
| Bursting Strength (Mullen) | ASTM D-774 | 76 kPa | 11 psi |
| Property | Test Method | SI Units | English Units |
|---|---|---|---|
| Melt Point | ASTM D-3418 (DTA) | 260-280°C | 500-536°F |
| Zero Strength Temperature | b | 255°C | 490°F |
| Coefficient of Thermal Conductivity | Cenco-Fitch | 0.195 W/m-K | 1.35 Btu-in/h-ft2-°F |
| Specific Heat | 1172 J/kg-K | 0.28 Btu/lb.°F | |
| Heat Deflection Temperature at 0.46 N/mm2 (66 psi) |
ASTM D-684 | 70°C | 158°F |
| Heat Deflection Temperature at 1.82 N/mm2 (264 psi) |
Tensile Bars | 51°C | 124°F |
| Dimensional Stability | 30 min at 150°C (302°F) | MD = 0.72% expansion TD = 2.2% shrinkage |
|
| Flammability Classification (c) | ANSI/UL 94 | VTM-0 | |
| Oxygen Index | ASTM D-2863 | 95% | |
| aFor 0.025 mm (1 mil) film at 25°C (77°F) unless specified. bTemperature at which a film supports a load of 0.14 N/mm2 (20 psi) for 5 sec. cThis classification rating is not intended to reflect hazards presented by this or any other material under actual fire conditions. |
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| Property | Test Method | SI Units | English Units |
|---|---|---|---|
| Dielectric Strength: Short-time in air at 23°C (73°F), 6.35 mm (1/4 in) diameter electrode, 0.79 mm (1/32 in) radius 60 Hz, 500 V/s rate of rise: 0.025 mm (1 mil) film |
ASTM D-149 | 260 kV/mm | 6500 V/mil |
| Dielectric Strength: Short-time in air at 23°C (73°F), 6.35 mm (1/4 in) diameter electrode, 0.79 mm (1/32 in) radius 60 Hz, 500 V/s rate of rise: 5 mm (20 mil) film |
Method A | 70 kV/mm | 1800 V/mil |
| Dielectric Constant: 25°C (77°F), 100 Hz to 1 MHz |
ASTM D-150 | 2.0 | |
| Dielectric Constant: -40 to 225°C (-40 to 437°F), 1000 Hz |
ASTM D-150 | 2.02-1.93 | |
| Dissipation Factor: 25°C (77°F), 100 Hz to 1 MHz |
ASTM D-150 | 0.0002-0.0007 | |
| Dissipation Factor: -40 to 225°C (-40 to 437°F), 1000 Hz |
ASTM D-150 | 0.0002 | |
| Dissipation Factor: -40 to 240°C (-40 to 464°F), 1 MHz |
ASTM D-150 | 0.0005 | |
| Volume Resistivity: -40 to 240°C (-40 to 464°F) |
ASTM D257 | >1 x 1018µm-cm | |
| Surface Resisitvity: -40 to 240°C (-40 to 464°F) |
ASTM D-257 | >1 x 1016 omega/sq | |
| Surface Arc Resistance | ASTM D-495 | 165 secd | |
| Insulation Resistance: at 100°C (212°F) |
Based upon 0.2 MF wound capacitor sections, using single layer, TEFLON® 50A Film | 350,000 Mohm-µF | |
| Insulation Resistance: at 150°C (302°F) |
Based upon 0.2 MF wound capacitor sections, using single layer, TEFLON® 50A Film | 250,000 Mohm-µF | |
| Insulation Resistance: at 200°C (392°F) |
Based upon 0.2 MF wound capacitor sections, using single layer, TEFLON® 50A Film | 65,000 Mohm-µF | |
| aFor 0.025 mm (1 mil) film at 25°C (77°F) unless specified. dSamples melted did not track. |
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| Property | Test Method | SI Units | English Units |
|---|---|---|---|
| Moisture Absorption | <0.01% | ||
| Weatherability | Continuously exposure in Florida | No adverse effects after 20 yrs | |
| Permeability, Gas: Carbon Dioxide |
ASTM D-1434 | cm3/m2-24 h-atme 25.9 x 103 |
|
| Permeability, Gas: Hydrogen |
ASTM D-1434 | cm3/m2-24 h-atme 34.1 x 103 |
|
| Permeability, Gas: Nitrogen |
ASTM D-1434 | cm3/m2-24 h-atme 5.0 x 103 |
|
| Permeability, Gas: Oxygen |
ASTM D-1434 | cm3/m2-24 h-atme 11.6 x 103 |
|
| Permeability, Vapors: Acetic Acid |
ASTM E-96 | g/m2 - d 6.3 |
g/100 in2-24 h 0.41 |
| Permeability, Vapors: Acetone |
ASTM E-96 | g/m2 - d 14.7 |
g/100 in2-24 h 0.95 |
| Permeability, Vapors: Benzene |
ASTM E-96 | g/m2 - d 9.9 |
g/100 in2-24 h 0.64 |
| Permeability, Vapors: Carbon Tetrachloride |
ASTM E-96 | g/m2 - d 4.8 |
g/100 in2-24 h 0.31 |
| Permeability, Vapors: Ethyl Alcohol |
ASTM E-96 | g/m2 - d 10.7 |
g/100 in2-24 h 0.69 |
| Permeability, Vapors:
Hexane |
ASTM E-96 | g/m2 - d
8.7 |
g/100 in2-24 h
0.56 |
| Permeability, Vapors:
Water |
ASTM E-96 | g/m2 - d
7.0 |
g/100 in2-24 h
0.40 |
| TEFLON® is chemically inert and solvent-resistant to virtually all chemicals except molten alkali metals, gaseous fluorine, and certain complex halogenated compounds such as chlorine trifluoride at elevated temperatures and pressures. | |||
| Property | Test Method | SI Units | English Units |
|---|---|---|---|
| Density | ASTM D-1505 | 2150 kg/m3 | 134 lb/ft3 |
| Coefficient of Friction: Kinetic (Film-to-Steel) |
ASTM D-1894 | 0.1-0.3 | |
| Refractive Index | ASTM D-542 | 1.341-1.347 | |
| Solar Transmission | ASTM E-424 | 96% | |
aFor 0.025 mm (1 mil) film at 25°C (77°F) unless otherwise specified. NOTE: These values are typical performance data for "TEFLON®" FEP fluorocarbon film; they are intended to be used as design data. We believe this information is the best currently available on the subject. It is offered as a possible helpful suggestion in experimentation you may care to undertake along these lines. It is subject to revision as additional knowledge and experience are gained. DuPont makes no guarantee of results and assumes no obligation or liability whatsoever in connection with this information. This publication is not license to operate under, or intended to suggest infringement of, any existing patents. Additional information is available upon request. |
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