Patent ID: 8759431

Claim:
A polyoxymethylene composition, which has at least one of the micro-wear loss of less than 1 μm maximum wear depth and less than 10 μm 2 wear area under a condition of a load of 2.5 g after being reciprocated 600,000 times at a speed of 8 inch/second and an environmental humidity of 13% to 17%RH and an environmental temperature of 3° C. to 10° C., the polyoxymethylene composition comprising: a polyoxymethylene copolymer of 80 wt % to 95 wt %; a composite lubricant of 1.0 wt % to 10.0 wt %, which comprises a solid lubricant and a liquid lubricant; a compatibilizer of 1.0 wt % to 10.0 wt %, wherein the compatibilizer comprises a maleic anhydride grafted styrene/low density ethylene copolymer; a nano-scale inorganic filler of 0.1 wt % to 3.0 wt %; a nucleating agent of 0.1 wt % to 3.0 wt %; a stabilizer of 0.5 wt % to 1.0 wt %; and an anti-static agent of 0.5 wt % to 5.0 wt %.