Ultra high molecular weight polyethylene （HMW PE） is a kind of high molecular compound. It is difficult to process, and has super strong wear resistance and self lubrication. It has high strength, stable chemical property and strong anti-aging property.
　　
　　Nylon has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self lubrication, and low friction coefficient
　　
　　Peek has the advantages of high temperature resistance, wear resistance, corrosion resistance and self lubrication. Compared with metal materials, peek has the advantages of light weight and low noise.
　　
　　High lubrication of polytetrafluoroethylene -- the one with lower friction coefficient in solid materials.