| 摘要 |
PROBLEM TO BE SOLVED: To provide a molding material for a commutator not generating cracks as compared with those of the conventional phenolic resin molding material comprising mainly glass fiber, even in a fusing process under severe treating conditions. SOLUTION: This phenolic resin material for the commutator characterized by containing the phenolic resin containing a resol type phenolic resin, silicone gel, an elastomer and an inorganic filler including glass fibers is provided with that preferably a part or the whole of the phenolic resin and the silicon gel are fused and mixed/kneaded in advance. COPYRIGHT: (C)2004,JPO
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