Polyoxymethylene (POM), also known as acetal or polyacetal, is a thermoplastic polymer with relatively high strength, rigidity and toughness. It was first synthesized in the 1920s and emerged as an engineering polymer in the 1950s. POM is produced by the ring-opening polymerization of formaldehyde. The repeating unit is (-CH2-O-)n, giving it the chemical formula (C2H4O)n. https://fortunetelleroracle.com/copyright-trading/medical-polyoxymethylene--an-overview-of-medical-applications-of-polyoxymethylene-952777