PTFE Micropowder in Lubricant Formulations
PTFE (polytetrafluoroethylene) has the lowest coefficient of friction of any solid material (~0.04 against steel). PTFE micropowder dispersed in lubricant base oils, greases, or applied as dry film lubricant provides boundary lubrication that persists even when the liquid lubricant film breaks down.
Applications
- Dry film lubricants — PTFE micropowder in volatile carrier (IPA, heptane) sprayed on fasteners, slides, hinges; carrier evaporates leaving PTFE film
- Grease additive — 3–10% PTFE micropowder in lithium/calcium grease for enhanced load-bearing and reduced wear
- Engine oil additive — 0.5–2% ultrafine (1 µm) PTFE in synthetic motor oil for reduced friction at startup
- Metalworking fluid — PTFE in cutting/drawing fluids for improved surface finish on aluminum
Technical Data
| Property | Value |
|---|---|
| Static COF (steel/steel) | 0.04 |
| Dynamic COF (steel/steel) | 0.04 |
| PV Limit | 1,000 psi × ft/min |
| Temperature Range | -200°C to +260°C |
| Chemical Resistance | Inert to virtually all chemicals |
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