Material Data Sheet
Material: 25% Carbon Filled PTFE
More commonly known as PTFE. This material exhibits a unique combination of heat resistance and low friction together with outstanding chemical and good electrical properties. Continuous use temperatures range -400F to +500F, no moisture absorption, high arc resistance, and is self lubricating with a low coefficient of friction. Many grades available. Typical carbon filler is high-purity coke powder, which maybe combined with graphite in concentrations. Compounds of Teflon and carbon have excellent wear resistance, both dry and in water. Chemical resistant and carry heavy loads under rubbing contact.
| Physical Properties | Value | Units |
| Specific Gravity | 2.09 | |
| Water Absorption, Immersion 24 Hours | ||
| Water Absorption, Immersion Saturation | ||
| Mechanical Properties | ||
| Tensile Strength @ Yield 73°F | 1,800 | psi |
| Tensile Elongation @ Break 73°F | 65 | % |
| Flexural Strength 73°F | 1,175 | psi |
| Fluxural Modulus of Elasticity | 160,000 | psi |
| Compressive Strength 10% Deformation | 1,700 | psi |
| Deformation Under Load | 4 | % |
| Compressive Modulus of Elasticity 73°F | 870,000 | psi |
| Hardness, Durometer "D" Scale | D65 | |
| Izod Impact, Notched @ 73°F | 1.9 | ft-lb/in of notch |
| Coefficient of Friction (Dry vs. Steel) Dynamic | 0.11 | |
| Maximum Static Bearing Load (P) | 1000 | psi |
| Maximum Unlubricated No Load Bearing Velocity (V) | 400 | ft/minute |
| Maximum Limiting PV (Unlubricated) | 10,000 | psi x ft/min |
| Electrical Properties | ||
| Thermal Conductivity | 4.5 | BTU-in/(hr/ft2°F) |
| Dielectric Strength | ||
| Dissipation Factor | ||
| Arc Resistance | ||
| Thermal Properties | ||
| CTE // to Laminates | 7.2 | in/in/°F x 10-5 |
| CTE I to Laminates | 8 | in/in/°F x 10-5 |
| Embrittlement Temperature | -400 | °F Min. |
| Continuous Service Temperature in Air | 500 | °F Max |
| Short Term Service Temperature | 550 | °F Max |
| Melting Point (Crystaline Peak) | 621 | °F |
| *The values shown in these and the following charts are typical, average properties. Actual values may differ due to variations in resin formulations and processing methods. These values are obtained from sources believed to be reliable, including the resin manufactures, converters and other published sources. However, they should not be used for specification or design purposes. |
copyright © 2008 Tamshell Corp. / all rights reserved
