polyoxymethylene
Also known as POM, polyacetal, polyformaldehyde, acetal, acetal resin, poly(oxymethylene), POM plastic
thumb|Ground glass joint#Joint clips|Keck clips made of polyoxymethylene
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Article
15 sectionsContents
- Development
- Production
- Homopolymer
- Copolymer
- Fabrication
- Typical mechanical properties
- Availability and price
- Advantages and disadvantages
- Machining
- Bonding
- Usage
- Degradation
- See also
- References
- External links
thumb|Ground glass joint#Joint clips|Keck clips made of polyoxymethylene
Polyoxymethylene (POM), also known as acetal, polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability. Short-chained POM (chain length between 8 and 100 repeating units) is also better known as paraformaldehyde (PFA). As with many other synthetic polymers, polyoxymethylenes are produced by different chemical firms with slightly different formulas and sold as Delrin, Kocetal, Ultraform, Celcon, Ramtal, Duracon, Kepital, Polypenco, Tenac and Hostaform.