Clutch facing

摘要

An asbestos-free high performance clutch facing which exhibits a less decrease in the friction coefficient as well as a less wearing during long-term repeated cycles of loading at high temperatures is disclosed. The clutch facing is a disk-shaped clutch facing produced by molding a composition for a friction material with heating and under pressure, the composition comprising: 15-50 parts by weight of (I) a binder composition comprising 95-30% by weight of (a) an aromatic hydrocarbon-formaldehyde resin-modified novolak type epoxy resin, and 5-70% by weight of a cyanate ester resin consisting essentially of (b) a polyfunctional cyanate ester, or a prepolymer of the cyanate ester, or (b) and (c) a monofunctional or polyfunctional maleimide; 20-70 parts by weight of (II) a fibrous reinforcing substrate with a fiber diameter of 0.2 mu m or more; 2-20 parts by weight of (III) a metallic fiber substrate with a fiber diameter of 10 mu m or more; and 5-40 parts by weight of (IV) a friction wear regulator.