| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a non-asbestos friction material that has a suppressed decrease in a friction coefficient, excellent stability of the friction coefficient and decreased counterpart-attacking property in a high temperature range. Ž<P>SOLUTION: The non-asbestos friction material comprises: an aggregate powder comprising a metal powder having hardness of 85 to 145 Hv, tensile strength of 400 to 600 N/mm<SP>2</SP>, an elongation of 20 to 49%, and a melting point of 1,450°C or higher; an organic fiber; and a binding material. After high temperature friction, a friction degradation layer is formed to a depth of 200 μm or less from the surface of the non-asbestos friction material, in which the aggregate powder included in the layer has a size of 100 to 60% of the size before the high temperature friction. The aggregate powder is in a form of granules, angular granules or polyhedrons. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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