POM (polyoxymethylene) is a thermoplastic material that can be used in a wide range of applications due to its beneficial properties. In addition to high toughness, its properties include high hardness, rigidity and high heat resistance. Very low water absorption capacity, high resistance to solvents and good sliding and wear characteristics round off the high-quality property profile.
The high dimensional accuracy of this material enables precision manufacturing of even complex component geometries. It can also be easily machined mechanically.
Due to its high load-bearing capacity, POM can be found in mechanical engineering, in the electrical industry and in medical technology. An approval permits its use in the food industry.
A distinction is made between homopolymers (POM H) and copolymers (POM C).
Polyoxymethylene homopolymer (POM H)
The homopolymer is also commonly known as POM-H. A known homopolymer is Delrin, for example. It has a high crystallinity, slightly higher density, hardness and strength. In addition, the coefficient of thermal expansion is slightly lower and the wear resistance higher than that of the POM-C.
Polyoxymethylene copolymer (POM C)
The copolymers, on the other hand, have higher impact strength, greater abrasion resistance and better thermal and chemical resistance. POM C is more resistant to hydrolysis, thermal oxidative degradation and chemical alkalis.