POM
?POM (Polyoxymethylene) is an engineering plastic material with very high crystallinity, it has superior abrasion resistance, creep resistance (a property of bearing very slow deformation due to long-term loading), fatigue resistance, and chemical resistance (resistant to almost all chemicals except for strong acid). However, it also has limitations in performance such as difficulties in adding flame retardancy (because of no aromatic structure such as a benzene ring in the macromolecule and high content of oxygen in the chemical composition), as well as difficulty in post-molding processing of the surface.