| 摘要 |
In relation to the NAO friction material free of copper component, this invention is to provide the friction material that prevents the occurrence of metal catch while securing sufficient wear resistance. In the friction material manufactured by forming the NAO friction material composition free of copper component, the above-described friction material composition contains no metal simple substance or alloy other than copper and contains, as the lubricant, metal sulfide having 600 centigrade or higher decomposition temperature to be decomposed into metal and sulfur. Especially, the above-described metal sulfide is preferably zinc sulfide, and the content thereof is preferably 0.5-2.0 weight % relative to the total amount of the friction material composition. Also, as the lubricant, the friction material further contains 2.0-5.0 weight % of graphite relative to the total amount of the friction material composition. |
