POM-C GF25
Acetal copolymer with 25% glass fiber — significantly improved stiffness and creep resistance vs unfilled POM-C. E-Mod ~8.5 GPa (vs 2.7 unfilled). Reduced elongation and impact. Retains POM's excellent dimensional stability, low friction, and chemical resistance. Trade names: TECAFORM AH GF25 (Ensinger), Hostaform C GF25 (Celanese). Used for precision gears, bearings, pump components, and structural parts needing higher stiffness than unfilled POM.
Chemical composition comparison (wt%)
Side-by-side: POM-C GF25 (COMPOSITION) (ISO 9988) vs ASTM
| Element | POM-C GF25 (COMPOSITION) | ASTM | Overlap |
|---|---|---|---|
| Polyoxymethylene (POM-C base) | 72–77% | — | — |
| Glass Fiber (short) | 23–27% | — | — |
Mechanical properties
Standard
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 110–130 | MPa |
| Elongation | 3–5 | % |
| Elastic Modulus | 8000–9000 | MPa |
| Density | 1.58–1.62 | g/cm3 |
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