Friction material and corresponding disc brake pad

Abstract

A friction material, a corresponding disc brake pad, and a braking system having the pad, in which the so-called “creep groan” phenomenon is suppressed or significantly mitigated. The material may be a graphite-free friction material having from 20 to 30% by volume of one or more abrasives, from 10 to 20% by volume of coke, up to 10% by volume of one or more metal sulfides, up to 20% by volume of one or more metals and/or metal alloys and/or intermetallic compounds in powder form, up to 40% by volume of a fibrous material comprising aramid fiber and steel fiber, from 10 to 20% by volume of phenolic resin as a binder and up to 10% by volume of one or more fillers that may be: calcium hydroxide, friction powder, PTFE, and fluorite.

Dependencies are inferred from the claim text.