| 摘要 |
PROBLEM TO BE SOLVED: To provide a phenolic resin molding material that gives an integrally molded article having a high rotation fracture strength and a reduced level difference between segments particularly when used for commutators. SOLUTION: The molding material comprises a phenolic resin, an aminosilane and rock wool surface-treated with a cationic ammonium salt. Preferably, the content of the rock wool is 5-20 wt% based on the whole molding material. The molding material further comprises, as an inorganic filler, a glass fiber and at least one selected from among clay, calcium carbonate and talc. COPYRIGHT: (C)2006,JPO&NCIPI
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