| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rubbing ball for a massage chair, which is easily recycled, is excellent in the wear resistance of an outer layer part, is able to be injection-molded and is excellent in flexibility of the outer layer part. Ž<P>SOLUTION: The rubbing ball 100 for the massage chair is provided with a bearing part 1 formed of an olefin resin and the outer layer part 2 formed of a thermoplastic elastomer composition disposed on the outer periphery of the bearing part 1, and for the thermoplastic elastomer composition, Durometer A hardness stipulated by JIS K6253 is 40A-90A, and a wear reduction in a DIN wear test under test conditions of the load 10 N, a rotation speed 40 rpm and traveling distance 40 m is ≤0.8 cm<SP>3</SP>. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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