| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a crimped short fiber suitable for enhancing mechanical properties and porosity of a wet-type friction material, and the friction material comprising the same. Ž<P>SOLUTION: The friction material contains a specific amount of the crimped short fiber comprising an organic polymer satisfying the following requirements: (a) the length weight average fiber length is 0.5-6 mm, (b) the fiber diameter D in a cross section perpendicular to the longitudinal direction is ≥13 μm and (c) the average curl degree C is ≥20%. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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