Thermoplastic
POM (acetal)
Semi-crystalline engineering thermoplastic (acetal); stiff, hard, low-friction and dimensionally stable — gears, bearings, snap-fits and precision mechanical parts.
| Property | Value | Source | Method | Conditions | Note |
|---|---|---|---|---|---|
| Density | 1.41 g/cm³ | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | ISO 1183 | 23 °C, dry | homopolymer ~1.42, copolymer ~1.41 |
| Young's modulus E | 3.1 GPa | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | ISO 527 | 23 °C, dry | 2.8–3.6 typical |
| Tensile strength | 65 MPa | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | ISO 527 | 23 °C, dry | 60–70 typical |
| Glass transition Tg | -60 °C | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | DSC | 23 °C, dry | usefulness comes from high crystallinity, not Tg |
| Melting point Tm | 175 °C | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | DSC | 23 °C, dry | homopolymer ~175, copolymer ~165 |
Used in
See where POM fits in a real product, and what it competes with:
Compare with
Sources
- CAMPUS plastics database — typical grade datasheet values (campusplastics.com)
Typical room-temperature values for learning and preliminary design; grades vary. Always confirm against the supplier datasheet before design work. Data policy: docs/DATA-SOURCES.md in the repository.