High Performance Film Distribution, Fabrication and TEFLON® Coating
Mechanical
Property Test Method SI Units Inch-Pound Units
Tensile Strength at break ASTM D-882 21 N/mm2 3000 psi
Elongation at break ASTM D-882 300% 300%
Yield Point ASTM D-882 12 MPa 1700 psi
Elastic Modulus ASTM D-882 480 MPa 70000 psi
Impact Resistance DuPont pneumatic impact tester 6.2 x 104 14 in-lb/mil
Folding Endurance (MIT) ASTM D-2176 100,000 cycles 100,000 cycles
Tear Strength:
Initial (Graves)		 ASTM D-1004 4.90 N 500 grams
Tear Strength:
Propagating (Elmendorf)		 ASTM D-1992 0.74 N 75 grams
Thermal
Property Test Method SI Units Inch-Pound Units
Melt Point ASTM D-3418 302°-310°C 575°-590°F
Thermal Conductivity (DTA) 0.195 W/(m - K) 1.35 Btu - in/(h - ft2 - °F)
Specific Heat Cenco-Fitch 1172 J/(kg - K) 0.28 Btu/lb - °F)
Dimensional Stability 30 min @ 150°C (302°F) MD = 1% shrinkage
TD = 1% shrinkage		 MD = 1% shrinkage
TD = 1% shrinkage
Oxygen Index ASTM D-2863 95% 95%
Electrical
Property Test Method SI Units Inch-Pound Units
Dielectric Strength, short-time, in air @ 23°C (73°F), 6.35 mm (1/4 inch) diameter electrode, 0.79 mm (1/32 inch) radius, 60 Hz, 500 V/s rate of rise:
0.025 mm (1 mil) film		 ASTM D-149 Method A 260 kV/mm 6500 V/mil
Dielectric Constant:
25°C (77°F), 100 Hz to 1 MHz		 ASTM D-150 2.0 2.0
Dissipation Factor:
25°C (77°F), 100 Hz to 1MHz		 ASTM D-150 0.0002-0.0007 0.0002-0.0007
Volume Resistivity:
-40° to 240°C (-40° to 464°F)		 ASTM D-257 >1 X 1017 ohm - centimeter >1 x 1017 - centimeter
Chemical
Property Test Method SI Units Inch-Pound Units
Moisture Absorbtion   <0.02%  
Permeability, gas:
Carbon Dioxide		 ASTM D-1434 cm3/(m2 - 24h - atm)**
14 x 103		  
Permeability, gas:
Nitrogen		 ASTM D-1434 cm3/(m2 - 24h - atm)**
2.0 x 103		  
Permeability, gas:
Oxygen		 ASTM D-1434 cm3/(m2 - 24h - atm)**
6.7 x 103		  
Permeability, vapors:
Water		 ASTM E-96 g/(m2 - d)
2		 g/(100 in2 - 24 h)
0.13
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.
Miscellaneous
Property Test Method SI Units Inch-Pound 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 1.350  
Solar Transmission ASTM E-424 96%  
* For 0.50 mm (2 mil) film at 25°C (77°F) unless otherwise specified.
** To convert to cm3(100 in2 - 24h - atm) multiply by 0.0645.
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