Acetal POM (Polyoxymethacrylate) Copolymer – mineral filler
Reinforced mineral charge
✓ This material meets the criteria ~ Specialized grades may meet this criteria
| Density | 1.48 to 1.65 g/cm³ ISO 1183 |
|---|---|
| Charpy notched impact | 3.0 to 5.0 kJ/m2 |
| Flexural modulus | 6940 to 7050 MPa ISO 178 |
| Flexural resistance | 90 MPa |
| Tensile modulus | 3,000 to 7,000 MPa ISO 527-1 |
| Tensile resistance | 44.0 to 75.0 MPa ISO 527-1, -2, Yield |
| Tensile strain | 4.9 to 9.5 % ISO 527-1, -2, Yield |
Injection moulding at 185–215 °C, mould temperature 80–100 °C. Highly susceptible to thermal degradation (release of formaldehyde above 230 °C). High shrinkage (1.8–2.5 %) → appropriate mould design is essential. No pre-drying required if stored correctly.
POM is a recyclable thermoplastic. Recycling is limited by its sensitivity to thermal degradation. Depolymerisation allows for the recovery of formaldehyde. Recycled grades exist for non-critical applications.
POM-FDA grades are approved for food contact (cold and hot water). Used in taps and kitchen equipment. Check the specific grade with the supplier.