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    • 9. 发明专利
    • Golf ball
    • 高尔夫球
    • JP2012139406A
    • 2012-07-26
    • JP2010294446
    • 2010-12-29
    • Dunlop Sports Co Ltdダンロップスポーツ株式会社
    • OKABE TOSHIKOISOGAWA KAZUHIKONAKAMURA HIROTAKA
    • A63B37/00
    • A63B37/0036A63B37/0031A63B37/0033A63B37/0037A63B37/0043A63B37/0045A63B37/0062A63B37/0066A63B37/0075A63B37/0092
    • PROBLEM TO BE SOLVED: To provide a golf ball 2 excellent in flight performance, and can be easily produced.SOLUTION: This golf ball 2 includes a core 4, an intermediate layer 6, and a cover 8. The difference between a hardness H(5.0) at a point 5 mm distant from the central point of the core 4 and a hardness Ho at the central point is not less than 6.0. The difference between a hardness H(12.5) at a point 12.5 mm distant from the central point and the hardness H(5.0) is not more than 4.0. The difference between a hardness Hs at the surface of the core 4 and the hardness H(12.5) is not less than 10.0. The difference between the hardness Hs and the hardness Ho is not less than 22.0. In the core 4, there is no zone where a hardness decreases from the central point to the surface. A hardness H3 of the cover 8 is larger than a hardness H2 of the intermediate layer 6. The cover 8 is made of a resin composition. The resin composition contains a polyamide copolymer containing (a-1) a polymerized fatty acid, (a-2) sebacic acid and/or azelaic acid, and (a-3) a polyamine component.
    • 要解决的问题:提供飞行性能优异的高尔夫球2,并且可以容易地制造。 解决方案:该高尔夫球2包括芯4,中间层6和盖8.在远离核心4的中心点的点处的硬度H(5.0)与硬度 何中中心点不低于6.0。 距中心点12.5mm处的硬度H(12.5)与硬度H(5.0)之差不大于4.0。 芯4表面的硬度Hs与硬度H(12.5)之差不小于10.0。 硬度Hs和硬度Ho之差不小于22.0。 在芯4中,没有硬度从中心点到表面减小的区域。 盖8的硬度H3大于中间层6的硬度H2。盖8由树脂组合物制成。 树脂组合物含有含有(a-1)聚合脂肪酸(a-2)癸二酸和/或壬二酸的聚酰胺共聚物和(a-3)多胺成分。 版权所有(C)2012,JPO&INPIT