Material Data Sheet
Material: 25% Glass 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. Glass in the form of short fibers are usually in 15% or 25% are the most popular. Glass has little effect on most of the electrical properties of Teflon. It resists acids and oxidation, but can be attacked by alkali. Glass filler improves creep strength
| Physical Properties | Value | Units |
| Specific Gravity | 2.22 | |
| Water Absorption, Immersion 24 Hours | ||
| Water Absorption, Immersion Saturation | ||
| Mechanical Properties | ||
| Tensile Strength @ Yield 73°F | 2,600 | psi |
| Tensile Modulus of Elasticity @ 73°F | 230,000 | psi |
| Tensile Elongation @ Break 73°F | 250 | % |
| Shear Strength @ 73°F | 2,500 | psi |
| Compressive Strength 10% Deformation | 1,200 | psi |
| Deformation under Load | 5 | % |
| Hardness, Durometer "D" Scale | D63 | |
| Izod Impact, Notched @ 73°F | 2.1 | ft-lb/in of notch |
| Coefficient of Friction (Dry vs. Steel) Dynamic | 0.15 - 0.25 | |
| 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 | ||
| Dielectric Constant | ||
| Dielectric Strength | ||
| Dissipation Factor | ||
| Arc Resistance | ||
| Thermal Properties | ||
| CTE, linear | 4.2 - 6.6 | 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. |
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