WEAR-RESISTANT RESIN COMPOSITION

PURPOSE:To obtain a resin composition excellent in wear resistance, prevention of friction, and mechanical properties by mixing a linear polyphenylene sulfide resin with a fluororesin and a spherical or fibrous filler. CONSTITUTION:50-85 pts.wt. linear polyphenylene sulfide resin (A) [e.g. Photoron KPS (trade name: Kureha Chemical Industries K.K.)] is mixed with 10-40 pts.wt. fluororesin (B) (e.g. a polytetrafluoroethylene) and 0-20 pts.wt. at least one filler (C) selected from the group consisting of spherical fillers (e.g. spherical silica particles) and fibrous fillers (e.g. highly heat-resistant aramide fibers or Teflon fibers) (the total of the components A, B, and C amounts to 100 pts.wt.). A resin composition is obtained which is extremely excellent in wear resistance, low friction properties, and mechanical properties. The composition can be used as a wear-resistant resin composition for a retainer for a dental spindle bearing wherein ultra-high speed rotation is required and a part related to a bearing which is used under severe conditions such as a piston ring wherein extremely high wear resistance is required.