How Improve Wear Resistance Of POM

POM (polyoxymethylene) is a high-performance engineering plastic that has good wear resistance due to its high bond energy and high cohesive energy. However, in order to meet the requirements of higher load, high speed, high temperature and other working conditions, it is necessary to further improve the wear resistance of POM. The following are some ways to improve the wear resistance of POM:

Polytetrafluoroethylene (PTFE): PTFE has an extremely low friction coefficient and can form a transfer film on the dual surface in a short time, turning the friction into friction inside the PTFE. Adding PTFE can significantly reduce the friction coefficient and wear of POM. However, it should be noted that the addition of PTFE may deteriorate the mechanical properties and processing properties of POM, so its addition amount should be controlled, and chemically treated PTFE can be considered to improve its compatibility with POM.

Ultra-high molecular weight polyethylene (UHMWPE): UHMWPE is a high-density polyethylene with excellent performance. Compared with ordinary polyethylene, it has a small friction coefficient and low wear. Adding a certain proportion of UHMWPE to POM can significantly improve the wear resistance and self-lubricating properties of POM.

Inorganic lubricants: such as graphite, boron nitride, molybdenum disulfide, etc. These materials have a layered lattice structure, and relative slip can occur between the layers, and a transfer film is formed on the surface of the friction pair, thereby reducing the friction resistance to the POM surface and improving wear resistance. However, it should be noted that the addition of certain inorganic lubricants may cause the thermal stability of POM to decrease, so they should be selected with caution.

During the processing of POM, appropriate processing temperature, pressure and time should be selected to ensure that the wear resistance of POM is fully utilized. Excessive temperature or pressure may cause POM to degrade or deform, thereby affecting its wear resistance.
Improving the wear resistance of POM can be achieved through a variety of methods such as adding wear-resistant materials, chemical modification, physical modification, surface treatment technology, and optimizing processing conditions. These methods can be selected and combined according to specific application scenarios and needs to achieve the best wear resistance.