| 摘要 |
PURPOSE:A friction material having improved frictional characteristics and wear resistance without using asbestos, obtained by adding steel fibers and ceramic fibers as the first reinforcing materials and acrylic fibers, etc. as the second reinforcing materials to a phenol resin binder. CONSTITUTION:(A) A phenol resin binder is blended with 20-60pts.wt. based on 100pts.wt. total blended raw materials of (B) steel fibers (preferably short fibers having fiber diameters of <=50mu and length of <=50mn) and/or ceramic fibers (preferably short fibers having fiber diameters of <=5mu and length of <=50mn) as the first reinforcing materials and (C) acrylic fibers (e.g., short fibers comprising a copolymer of acrylonitrile and methyl acrylate, having fiber diameters of <=20mu and length of <=50mn) and/or acrylic type refractory fibers (obtained by calcining acrylic fibers at 200-400 deg.C) as the second reinforcing materials, to give the desired friction material. The weight ratio of the component B to C is preferably (1/9)-(9/1). |
