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Patent Searching and Data


Title:
FRICTIONAL MEMBER, AND FRICTIONAL MATERIAL COMPOSITION AND FRICTIONAL MATERIAL FOR LOWER-LAYER MATERIAL
Document Type and Number:
WIPO Patent Application WO/2019/082350
Kind Code:
A1
Abstract:
Provided are: a frictional member which has satisfactory crack resistance and satisfactory shear strength at room temperature and high temperature, is less aggressive on a disc rotor, and has high vibration damping properties and thereby reduces the occurrence of brake squeal; and a frictional material composition and frictional material for a lower-layer material which can be used to obtain the frictional member. More specifically, the frictional member has an upper-layer material, a lower-layer material, and a back plate in that order. The lower-layer material contains fibrous wollastonite. The fibrous wollastonite has an average fiber length of 100-850 μm and an aspect ratio (average fiber length/average fiber diameter) of 8 or more.

Inventors:
TAKAHASHI, Yoshihisa (9-2, Marunouchi 1-chome, Chiyoda-k, Tokyo 06, 〒1006606, JP)
BABA, Kazuya (9-2, Marunouchi 1-chome, Chiyoda-k, Tokyo 06, 〒1006606, JP)
Application Number:
JP2017/038772
Publication Date:
May 02, 2019
Filing Date:
October 26, 2017
Export Citation:
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Assignee:
HITACHI CHEMICAL COMPANY, LTD. (9-2 Marunouchi 1-chome, Chiyoda-ku Tokyo, 06, 〒1006606, JP)
International Classes:
C09K3/14; F16D69/02
Foreign References:
JPH09316209A1997-12-09
JP2009024153A2009-02-05
JPS59207980A1984-11-26
Attorney, Agent or Firm:
HIRASAWA, Kenichi et al. (OHTANI PATENT OFFICE, Toranomon ES Bldg. 7F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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