PTFE Machined Components
Information
It is a PTFE gasket with filler materials such as glass fiber, carbon fiber, and graphite, etc. Improved mechanical and processing properties can be additionally reached by a combination of virgin PTFE and different fillers.
| Sr. No. | Compounds | Virgin PTFE | Glass Filled PTFE (25%) | Carbon Filled PTFE (25%) | Bronze Filled PTFE (40%) | Graphite Filled PTFE (15%) | |
| Properties | Unit | ||||||
| 1 | Density | g/cc | 2.1-2.2 | 2.22-2.25 | 2.0-2.2 | 3.0-3.2 | 2.10-2.16 |
| 2 | Tensile Strength | kg/cm2 | 210-375 | 125-200 | 125-200 | 125-225 | 150-200 |
| 3 | Elongation At Break | % | 250-400 | 200-300 | 80-150 | 200-350 | 150-250 |
| 4 | Compressive Strength | kg/cm2 | 40-50 | 75-85 | 75-85 | 85-100 | 65-75 |
| 5 | Impact Strength | J/cm | 1.4-1.5 | 1.0-1.1 | 0.7-0.8 | 0.9-1.0 | 0.8-0.9 |
| 6 | Hardness | Shore D | 58-62 | 58-63 | 60-65 | 62-66 | 60-65 |
| 7 | Coefficient of Friction | ||||||
| a. Dynamic P- 7kg/cm2 V-0.5 | 0.04-0.06 | 0.5-0.54 | 0.12-0.17 | 0.11-0.15 | 0.11-0.16 | ||
| b. Static P-35 kg/cm2 | 0.05-0.08 | 0.11-0.13 | 0.06-0.11 | 0.08-0.10 | 0.08-0.10 | ||
| 8 | Water absorption (max.) | % | 0 | 0.013 | 0 | 0 | 0 |
| 9 | Continuous Service Temperature | °C | +260 | +260 | +260 | +260 | +260 |
| 10 | Di-electric Strength | Kv/mm | 22-24 | 11-12 | 1-2 | Conductive | 1-2 |
| 11 | Chemical Resistance | PTFE is chemically inert & unaffected by all known chemicals except molten or dissolved alkali metals- Sodium, Potassium, Rubidium, Cesium, Francium & Fluorine Gas, certain fluorine compounds and complexes at elevated temperatures. Filled PTFE has inferior chemical resistance depending upon the particular filler. | |||||