TECHNICAL DESCRIPTION PolyChloroTriFluoroEthylene is a fluorocarbon-based polymer and is commonly abbreviated PCTFE. The Kel-F® brand is a registered trademark of 3M, but they discontinued production in 1995. The only remaining brand, Neoflon ®, is made by Daikin Industries of Japan. This PCTFE resin has the same chemical structure and properties as the original Kel-F® brand material.
GENERAL PROPERTIES PCTFE offers the unique combination of physical and mechanical properties, nonflammability, chemical resistance, near zero moisture absorption, and excellent electrical properties. These characteristics cannot be found in any other thermoplastic fluoropolymer with a useful temperature range of -400°F to +400°F (-240°C to +204°C).
PCTFE also has extremely low outgassing (0.01% TML, 0.00% CVCM, 0.00% WVR when tested per ASTM E-595-90), so it is suitable for use in aerospace and flight applications.
APPLICATIONS
- Cryogenic applications -- super-cold refrigeration components
- Valves -- seats, stems, seals
- Seals -- lips, o-rings, v-rings, special construction seals
- Compressors & pumps
- Films -- food packaging, pharmaceutical packaging, optical recording, electroluminescent display panels
- Gaskets -- pressure, diaphragm, liquid gauge seals, fluid handling
- Bearings -- sleeve & thrust
- Stock shapes -- for machining components
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TYPICAL PROPERTIES of PCTFE | ||
| ASTM or UL test | Property | PCTFE |
| PHYSICAL | ||
| D792 | Density (lb/in³) (g/cm³) |
0.077 2.13 |
| D570 | Water Absorption, 24 hrs (%) | < 0.01 |
| MECHANICAL | ||
| D638 | Tensile Strength (psi) | 5,300 |
| D638 | Tensile Modulus (psi) | 207,000 |
| D638 | Tensile Elongation at Break (%) | 150 |
| D790 | Flexural Strength (psi) | 8,500 |
| D790 | Flexural Modulus (psi) | 180,000 |
| D695 | Compressive Strength (psi) | 5,500 |
| D695 | Compressive Modulus (psi) | 180,000 |
| D785 | Hardness, Shore D | D90 |
| D256 | IZOD Notched Impact (ft-lb/in) | 5 |
| THERMAL | ||
| D696 | Coefficient of Linear Thermal Expansion (x 10-5 in./in./°F) |
7.0 |
| D648 | Heat Deflection Temp (°F / °C) at 264 psi |
258 / 126 |
| D3418 | Melting Temp (°F / °C) | 415 / 212 |
| - | Max Operating Temp (°F / °C) | 270 / 132 |
| C177 | Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10-4 cal/cm-sec-°C) |
1.45 4.99 |
| UL94 | Flammability Rating | V-0 |
| ELECTRICAL | ||
| D149 | Dielectric Strength (V/mil) short time, 1/8" thick | 500 |
| D150 | Dielectric Constant at 1 MHz | - |
| D150 | Dissipation Factor at 1 MHz | - |
| D257 | Volume Resistivity (ohm-cm)at 50% RH | 1018 |
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. Contact us for manufacturers' complete material property datasheets.KEL-F is a registered trademark of 3M Company.
All values at 73°F (23°C) unless otherwise noted.
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