申请人:Dunlop Sports Co. Ltd.
公开号:US10188910B2
公开(公告)日:2019-01-29
An object of the present invention is to provide a golf ball having an excellent flight performance on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover covering the spherical core, wherein a hardness difference D1 (H75−H0) between a hardness H75 at a point located at a distance of 75% of a core radius from a center of the spherical core and a center hardness H0 of the spherical core is 15 or more and 35 or less in Shore C hardness, a hardness difference D2 (Hs−H75) between a surface hardness Hs of the spherical core and the hardness H75 at the point located at the distance of 75% of the core radius from the center of the spherical core is −1 or more and 3.5 or less in Shore C hardness, and a hardness difference D3 ((H0+H75)/2−H37.5) between a hardness of (the center hardness H0 of the spherical core+the hardness H75 at the point located at the distance of 75% of the core radius from the center of the spherical core)/2 and a hardness H37.5 at a point located at a distance of 37.5% of the core radius from the center of the spherical core is 0.5 or more and 6.5 or less in Shore C hardness.
本发明的目的是提供一种在发球木杆击球时具有优异飞行性能的高尔夫球。本发明提供了一种高尔夫球,它包括一个球形芯和至少一个覆盖在球形芯上的盖,其中位于球形芯中心距离球形芯半径 75% 处的硬度 H75 与球形芯中心硬度 H0 之间的硬度差 D1(H75-H0)为 15 或以上,邵氏 C 硬度为 35 或以下、球形芯表面硬度 Hs 与位于距球形芯中心 75% 的芯半径处的硬度 H75 之间的硬度差 D2(Hs-H75)为-1 或以上且 3.硬度差 D3((H0+H75)/2-H37.5)为 0.5 或 0.5 以上且 6.5 或 6.5 以下(邵氏 C 硬度)。