Rock wool Fibers were prepared by high temperature melting from the fine basalt, dolerite, limestone, dolomite, and coke, which is a high-quality reinforcing fiber of brake materials replacing asbestos.

(a) Good wear resistance and high thermal stability by high temperature melting.

(b) Low agglomeration due to water washing.

(c) Good reinforcing effect and well-proportioned dispersion

(d) No pollution and biodegradability, high-quality reinforcing material to no asbestos friction materials.