|
|
Typical Valuea |
|
Property |
Test Method |
SI Units |
English Units |
|
Mechanical:
Tensile Strength at Break |
|
|
ASTM D-882 |
21 N/mm 2 |
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 10 3
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 |
|
|
|
|
Thermal:
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 (66psi)
at 1.82 N/mm2 (264psi) |
ASTM D-684
Tensile Bars |
|
|
|
|
70°C
51°C |
158°F
124°F |
|
Dimensional
Stability |
|
|
30 min
at 150°C (302°F) |
MD=0.72%
expansion
TD= 2.2% shrinkage |
|
Flammability Classificationc |
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. |
|
Typical Valuea |
|
|
Property |
Test Method |
SI Units |
English Units |
|
Electrical
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
5 mm (20 mil) film |
|
|
ASTM D-149
Method A |
|
|
260 kV/mm
70 kV/mm |
6500 V/mil
1800 V/mil |
|
Dielectric
Constant,
25°C (77°F), 100 Hz to 1 MHz
-40 to 225°C (-40 to 437°F), 1000 Hz |
ASTM D-150 |
|
|
2.0
2.02-1.93 |
|
Dissipation
Factor,
25°C (77°F), 100 Hz to 1 MHz
-40 to 225°C (-40 to 437°F), 1000 Hz
-40 to 240°C (-40 to 464°F), 1 MHz |
ASTM D-150 |
|
|
|
0.0002-0.0007
0.0002
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 10
16 omega/sq |
|
Surface Arc
Resistance |
ASTM D-495 |
>165 secd |
|
Insulation
Resistance
at 100°C (212°F)
at 150°C (302°F)
at 200°C (392°F) |
Based
upon 0.2 MF
wound capacitor
sections, using single
layer, Teflon® 50A Film |
|
|
350,000 Mohm-µF
250,000 Mohm-µF
65,000 Mohm-µF |
aFor
0.025 mm (1 mil) film at 25°C (77°F) unless specified.
dSamples melted did not track. |
|
|
Typical Valuea |
|
|
Property |
Test Method |
SI Units |
English Units |
|
Chemical:
Moisture Absorption |
|
|
_ |
<0.01% |
|
Weatherability |
Continuously
exposure
in Florida |
No adverse
effects after 20 yrs |
|
Permeability,
Gas:
Carbon Dioxide
Hydrogen
Nitrogen
Oxygen |
ASTM D-1434 |
cm3/m2-24
h-atme
25.9 x 103
34.1 x 103
5.0 x 103
11.6 x 103 |
|
Permeability,
Vapors:
Acetic Acid
Acetone
Benzene
Carbon Tetrachloride
Ethyl Alcohol
Hexane
Water |
ASTM E-96 |
g/m2 -
d
6.3
14.7
9.9
4.8
10.7
8.7
7.0 |
g/100 in2-24
h
0.41
0.95
0.64
0.31
0.69
0.56
0.40 |
|
PTFE 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
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.
eTo convert cm3/100 in2-2.4 h-atm,
multiply by 0.0645.
 |
