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    • 3. 发明公开
    • GOLF BALL
    • 高尔夫球
    • EP3088052A1
    • 2016-11-02
    • EP16166585.6
    • 2016-04-22
    • Dunlop Sports Co., Ltd.
    • MIMURA, KoheiSAJIMA, TakahiroTACHIBANA, Kosuke
    • A63B37/00
    • A63B37/0092A63B37/0031A63B37/0033A63B37/0039A63B37/0043A63B37/0044A63B37/0045A63B37/0062A63B37/0063A63B37/0064A63B37/0076
    • An object of the present invention is to provide a golf ball traveling a great distance on driver shots. The present invention provides a golf ball comprising a spherical core including an inner layer and an outer layer, an intermediate layer and a cover, wherein a difference (H X+1 -H X-1 ) between a hardness (H X+1 ) at a point outwardly away in a radial direction from a boundary between the inner layer and the outer layer of the spherical core by 1 mm and a hardness (H X-1 ) at a point inwardly away in the radial direction from the boundary between the inner layer and the outer layer of the spherical core by 1 mm is 0 or more in Shore C hardness, a surface hardness (H X+Y ) of the spherical core is more than 65 in Shore C hardness, an angle α of a hardness gradient of the inner layer is 0° or more, a difference (α-β) between the angle α and an angle β of a hardness gradient of the outer layer is 0° or more, a total thickness of a thickness (Tm) of the intermediate layer and a thickness (Tc) of the cover is 3 mm or less, and the cover has a highest hardness among the constituent members of the golf ball.
    • 本发明的目的是提供一种在驾驶员镜头上行驶很远的高尔夫球。 本发明提供一种高尔夫球,其包括具有内层和外层的球形芯,中间层和盖,其中硬度(H X + 1-X X-1) 在从球形芯的内层和外层之间的边界向外径向外的点处,并且在径向方向上从径向方向上的边界向内的点处的硬度(H X-1) 球形芯的内层和外层1mm的肖氏C硬度为0以上,球状芯的表面硬度(H X + Y)在肖氏C硬度中大于65,硬度的角度± 内层的梯度为0°以上,外层的硬度梯度的角度±与角度θ之间的差(±2)为0°以上,厚度的总厚度(Tm)为 中间层和盖的厚度(Tc)为3mm以下,并且该盖在该成分中具有最高的硬度 高尔夫球的成员。