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PTFE ball,
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GENERAL PROPERTIES
Mechanical properties of PTFE® are low compared to other plastics, but its properties remain at a useful level over a wide temperature range of -100°F to +400°F (-73°C to 204°C). It has excellent thermal and electrical insulation properties and a low coefficient of friction. PTFE is very dense and cannot be melt processed -- it must be compressed and sintered to form useful shapes.
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| TYPICAL PROPERTIES OF PTFE® PTFE |
| PHYSICAL |
| ASTM or UL test |
Property |
PTFE (unfilled) |
| D792 |
Density (lb/in3)
(g/cm3) |
0.0783
2.163 |
| D570 |
Water Absorption, 24 hrs (%) |
< 0.01 |
| MECHANICAL |
| D638 |
Tensile Strength (psi) |
3,900 |
| D638 |
Tensile Modulus (psi) |
80,000 |
| D638 |
Tensile Elongation at Break (%) |
300 |
| D790 |
Flexural Strength (psi) |
No break |
| D790 |
Flexural Modulus (psi) |
72,000 |
| D695 |
Compressive Strength (psi) |
3,500 |
| D695 |
Compressive Modulus (psi) |
70,000 |
| D785 |
Hardness, Shore D |
D50 |
| D256 |
IZOD Notched Impact (ft-lb/in) |
3.5 |
| THERMAL |
| D696 |
Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
|
7.5 |
| D648 |
Heat Deflection Temp (°F/°C) at 264 psi |
132/55 |
| D3418 |
Melting Temp (°F/°C) |
635/335 |
| - |
Max Operating Temp (°F/°C) |
500/260 |
| C177 |
Thermal Conductivity
(BTU-in/ft2-hr-°F)
(x 10-4 cal/cm-sec-°C)
|
1.703
5.863 |
| UL94 |
Flammability Rating |
V-O |
| ELECTRICAL |
| D149 |
Dielectric Strength (V/mil) short time, 1/8” thick |
285 |
| D150 |
Dielectric Constant at 1 MHz |
2.1 |
| D150 |
Dissipation Factor at 1 M Hz |
< 0.0002 |
| D257 |
Volume Resistivity (ohm-cm) at 50% RH |
> 1018 |
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Note: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control.
All values a 73°F (23°C) unless otherwise noted.
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