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Overview
PTFE is a soft, low friction fluoropolymer with outstanding chemical resistance and weathering resistance. PTFE is stable at temperatures up to 500°F and it is often used in high temperature environments. PTFE also has excellent electrical insulating properties.
PTFE is available in a variety of formulations including unfilled, glass-filled, and bearing grades.
Unfilled PTFE
Unfilled PTFE is extremely soft and formable and it is often used for chemical resistant seals and gaskets.
Glass-filled PTFE
Glass-filled PTFE has enhanced strength and stiffness.
Bearing Grades of PTFE
Bearing grades of PTFE have extremely low friction and high service temperatures. They are frequently specified for high performance bearings and bushings, particularly in applications that require resistance to corrosive chemicals.
Virgin Grade PTFE
PTFE sheet, rod, and tube are available in virgin grade, which is made from virgin PTFE resin as well as reprocessed or mechanical grade, which is made from recycled material.
PTFE Standard Sizes
| SHEET |
48"x48" (0.03"-3.0" thick)
|
| ROD |
diameter 0.125"-12.0"
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| TUBE |
0.3125"-2.5"
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PTFE Grades
NOTE: Several grades of PTFE are available. For additional information on PTFE plastic materials, contact your local Curbell Plastics representative or call Curbell at 1-888-287-2355.
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Performance Characteristics
- Outstanding chemical resistance
- Extremely low friction
- Soft and formable
- Good bearing and wear properties (bearing grade)
- Good weathering resistance
- Performs well at elevated temperatures
|
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Typical Applications
- Seals and gaskets
- Valve and fitting components
- Pump parts
- Manifolds
- Semiconductor equipment
- Scientific equipment
- Medical equipment
- Chemical resistant tubing
- Bearings and bushings (bearing grades)
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Typical Properties
|
UNITS |
ASTM TEST |
PTFE |
| Tensile strength |
psi |
D-638 |
1,500-3,000 |
| Flexural modulus |
psi |
D-790 |
72,000 |
| Izod impact (notched) |
ft-lbs/in of notch |
D-256 |
3.5 |
| Heat deflection temperature @ 66 psi |
°F |
D-648 |
250 |
| Maximum continuous service temperature in air |
°F |
|
500 |
| Water absorption (immersion 24 hours) |
% |
D-570 |
<0.01 |
| Coefficient of linear thermal expansion |
in/in/°Fx10-5 |
D-696 |
5.5 |
| Coefficient of friction (dynamic) |
|
|
0.10 |
| Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand. |
| COEFFICIENT OF FRICTION |
CONTINUOUS SERVICE TEMPERATURE IN AIR |
| of PTFE compared with Cast Nylon 6 and Copolymer Acetal |
of PTFE compared with Cast Nylon 6 and Copolymer Acetal |
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