POM-M, POM-C machining services

Polyoxymethylene homopolymer (POM) is an impact and abrasion resistant semi-crystalline thermoplastic. Acetal (acetal), Polyoxymethylene (POM), Polyacetal (polyacetal), Polyformaldehyde, Saigang, these are its names, and the common ones are black and white. Despite being opaque in nature, POM is available in a variety of colors.

This material has high mechanical strength and stiffness, good sliding properties (low coefficient of friction), and excellent wear resistance. Because acetal hardly absorbs water and has excellent dimensional stability, it is an excellent choice for complex shapes and precision machined parts.

However, it is unstable and easily degraded under acidic conditions and high temperatures. Since it contains a large amount of oxygen in its molecules, it is difficult to impart flame retardancy, and its continuous operating temperature ranges from about -40°C to 120°C.

POM has two variants, acetal homopolymer POM-H and acetal copolymer POM-C, POM-H is greater than POM-C in terms of hardness and stiffness, and the melting point of POM-H (172-184°C) is higher than that of POM -C (160-175°C) is about 10°C, the density is 1.410-1.420 g/cm3, and the crystallinity is 75-85%. There are also some modified POMs with higher melting points.