Polyoxymethylene
Description
Polyoxymethylene (CAS 9002-81-7), commercially recognized as acetal resin or POM plastic, is a high-performance engineering thermoplastic used across precision manufacturing industries. It delivers exceptional dimensional stability and low friction characteristics.
These properties make it a preferred base material for machined and injection-molded components. In automotive manufacturing, POM is processed into fuel system components, door lock mechanisms, and gear assemblies.
Tight tolerances and resistance to fuels and lubricants are critical in these applications. Electronics manufacturers rely on it for connector housings, switches, and precision insulators requiring consistent dielectric performance.
The construction sector uses POM for window fittings, fasteners, and plumbing components where long-term mechanical load-bearing is required. In general plastics processing, it competes directly with nylon and polycarbonate.
It is ideal for applications demanding stiffness, low moisture absorption, and machinability. Polyoxymethylene is supplied as pellets or granules suited for injection molding, extrusion, and CNC machining stock.
It is available in homopolymer and copolymer grades, with copolymer variants offering broader chemical resistance. These variants provide improved thermal stability for demanding processing conditions during manufacturing.
Specialty grades include glass-filled, UV-stabilized, and lubricated formulations targeting specific end-use performance requirements. These options ensure the material meets the rigorous demands of modern industrial engineering.
Physical Properties
| Melting Point | 175 °C |
| Density | 1.41 g/cm³ (solid) |
| Flash Point | 158 °F |
| Form | prilled |
| Vapor Pressure | <1.45 mm Hg ( 25 °C) |
Trade & Regulatory
| UN Number | 2213 |
| ADR Class | 4.1 |
| Packing Group | III |
| WGK (Germany) | 3 |
Documentation
Other Names
POM plastic|acetal resin|POM|acetal|Fetuin|Fetuins|RefChem:388970|Fetuin, Fetal Bovine Serum
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