Friction material composite

摘要

A friction material composite especially suitable for an electromagnetic clutch, includes a reinforcing fiber material, optionally an organic filler, an inorganic filler, and a friction and abrasion conditioner bonded together by a thermosetting resin binder. The reinforcing fiber material contains 25 to 35 percent by volume of staple cellulose pulp of not more than 150 mu m in fiber length. The organic filler contains 30 to 40 percent by weight of an organic filler material of not more than 840 mu m in maximum grain size. The friction and abrasion conditioner contains and 0.5 to 5 percent by volume of aluminum oxide and/or magnesium oxide of not more than 250 mu m in maximum grain size. The material composite has a porosity in the range of 15 to 30 percent by volume.