POM-C + PTFE (Bearing Grade)
POM copolymer internally lubricated with PTFE particles (typically 15–20%). Dramatically reduced coefficient of friction (0.15–0.20 vs 0.35 for unfilled POM) and improved wear resistance in dry-running applications. Retains POM base properties: good stiffness, dimensional stability and chemical resistance. Trade names: Ultraform N2200 G53 (BASF), TECAFORM AH TF (Ensinger), Delrin AF (DuPont). Used for plain bearings, bushings, sliding pads, guide rails, gear wheels in food machinery, conveyor components and self-lubricating wear parts.
Chemical composition comparison (wt%)
Side-by-side: POM-C + PTFE (Bearing Grade) (COMPOSITION) (ISO 9988) vs ASTM
| Element | POM-C + PTFE (Bearing Grade) (COMPOSITION) | ASTM | Overlap |
|---|---|---|---|
| Polyoxymethylene (POM-C base) | 78–85% | — | — |
| Polytetrafluoroethylene (PTFE) | 15–22% | — | — |
Mechanical properties
General
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 45–55 | MPa |
| Tensile Modulus | 2200–2600 | MPa |
| Elongation at Break | 8–15 | % |
| Coefficient of Friction (dry vs steel) | 0.15–0.2 | - |
| Density | 1.41–1.43 | g/cm³ |
| Melting Point | 164–168 | °C |
| HDT/A (1.8 MPa) | 95–105 | °C |
| Water Absorption (24h) | 0.1–0.15 | % |
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