| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction material composition which seldom occurs a lowering of an area to be adhered after molded in the cause of a segregation of a cashew dust in a friction material composition. SOLUTION: In a friction material composition containing a fiber substrate, a binding agent, an inorganic filler and an organic filler, the organic filler contains a cashew dust which contains at most 1 mass% of the cashew dust with a grain size of 425μm or more and every material in the friction material composition coated with a liquid isoprene rubber with a viscosity mean molecular weight of not more than 40,000. The friction material contains 0.5-20.0 mass% of the liquid isoprene rubber to the whole friction material composition, not more than 10 mass% of the cashew dust to the whole friction material composition. The friction material is made by forming the friction material composition under heating and pressing, and also the friction material is made by lying a lining material formed by heating and pressing the friction material composition described above between a frictional face and a back plate. COPYRIGHT: (C)2009,JPO&INPIT
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