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. The most popular property of POM is its ease of machining. POM is also very hard and abrasion resistant. POM has been widely used in electronic electrical, mechanical, instrument, daily light industry, automobile, and so on.