Hitachi Chemical Company, Ltd.

Nissan Motor Company Limited

Japan Brake Industrial Co., Ltd.

Manabu Ono

Mitsuo Unno

Takashi Kikudome

Teruyuki Nagayoshi

Mitsuhiro Inoue

Takahiro Mibe

Noboru Suzuki

Takenori Abe

Hiroki Morozumi

Yukio Takai

Provided is a friction material composition comprising: a binder; a fibrous base material; an abrasive material; an inorganic filler; and an organic filler,

Friction material composition, friction material using the same, and friction member

The present invention is to provide a friction material composition comprising a fibrous material except for asbestos, an inorganic friction regulating agent, an organic friction regulating agent and a binder, wherein active alumina is contained as the inorganic friction regulating agent, and a fluorine series polymer is contained as the organic friction regulating agent, and to provide a friction material using the friction material composition.

Friction material composition and friction material therefrom

There are disclosed a friction material composition which comprises a fibrous material except for asbestos, an inorganic friction regulator, an organic friction regulator and a binder, part of the inorganic friction regulator is &#x3b1; alumina and &#x3b3; alumina in combination, a weight ratio of the &#x3b1; alumina and the &#x3b3; alumina, &#x3b1; alumina:&#x3b3; alumina, is in the range of 1:20 to 1:5, and part or whole part of the binder is a silicon-containing phenol resin, and a friction material obtained by molding the friction material composition under heating and pressure.

Friction material composition and friction material using the same

A friction material composition containing a fibrous material, a binder and a friction adjusting agent, wherein the friction adjusting agent is secondary aggregates of an activated alumina being spherical and having a diameter of 10 to 300 &#x3bc;m, or an activated alumina having a specific surface area of 100 to 400 m/g and an average particle diameter of 1 to 200 &#x3bc;m. The composition can be used for producing a friction material which exhibits significant improvement with respect to fading phenomenon, without adversely affecting its characteristics of attacking to a disc rotor, which is the article mating therewith, and without marked reduction of the friction coefficient at an elevated temperature, and is capable of controlling the thickness of the sliding film formed on a frictionally sliding face and preventing a high frequency noise (grabbing chatter).

Friction material composition and friction material using the composition

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Hitachi, Japan

Manabu Ono