Akebono Brake Industry Co., Ltd.

Toru Kawata

Takuya Takada

Motoyuki Miyaji

Atsushi Ueno

Hiroshi Tokumura

Shuichi Oshiden

A method for manufacturing a friction material containing a friction modifier, a fibrous material and a binder as raw materials is provided. The method includes a step of mixing and agitating the raw materials by low frequency acoustic agitation. A content of the fibrous material in the friction material may be 1 mass % or more and 50 mass % or less. The content of the fibrous material in the friction material may be 3 mass % or more and 40 mass % or less.

Method for manufacturing friction material

A friction material composition of the present invention includes a fibrous base, a friction regulator, and a binder and has a copper content of 0.5 mass % or less in terms of copper element amount. The friction material composition contains regenerated cellulosic fibers as the fibrous base. In an embodiment of the friction material composition, the regenerated cellulose fiber has a fiber length of 2 mm to 20 mm.

Friction material composition and friction material

A friction material includes a bio-soluble inorganic fiber and a metal sulfide. A content of the bio-soluble inorganic fiber based on the friction material is 7% by volume or more. The friction material includes no copper component and no metal fiber. The friction material may further include zinc.

Friction material

A friction material includes a fiber base material, a friction modifying material and a binder. The friction modifying material includes alumina particles including, as a main component, &#x3b8;-alumina particles. The &#x3b8;-alumina particles are contained in an amount of 1 mass % or more in the friction material.

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Tokyo, Japan

Toru Kawata