FRICTION MATERIAL COMPOSITION, AND FRICTION MATERIAL USING THE SAME

摘要

Disclosed is a friction material composition comprising a fiber matrix, a binder, an organic filler and an inorganic filler, wherein the fiber matrix comprises at least two mineral fibers having different average fiber lengths from each other, the difference between the minimum value and the maximum value among the average fiber lengths of the mineral fibers is 50 µm or greater. Also disclosed is a friction material produced by pressure-molding the friction material composition while heating. Further disclosed is a friction material having an underlayer material between a friction surface and a back metal, wherein the underlayer material is produced by pressure-molding the friction material composition while heating.