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    GOLF BALL
    21.
    发明申请
    GOLF BALL 审中-公开
    高尔夫球

    公开(公告)号：US20130324314A1

    公开(公告)日：2013-12-05

    申请号：US13866071

    申请日：2013-04-19

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Hidetaka INOUE ,  Takahiro SAJIMA

    IPC: A63B37/00

    CPC classification number: A63B37/0054 ,  A63B37/0003 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0039 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0051 ,  A63B37/0063 ,  A63B37/0064 ,  A63B37/0074 ,  A63B37/0075 ,  A63B37/0092 ,  C08K5/0025 ,  C08K5/09 ,  C08K5/098

    Abstract: A golf ball 2 includes a core 4 and a cover 6. The core 4 includes a center 8 and an envelope layer 10 each of which is formed by a rubber composition being crosslinked. At least one of the rubber compositions of the center 8 and the envelope layer 10 includes a base rubber (a), a co-crosslinking agent (b), a crosslinking initiator (c), and an acid and/or a salt (d). The co-crosslinking agent (b) is: (b1) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms; or (b2) a metal salt of an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms. A hardness H(Ie) at an innermost portion of the envelope layer 10 is greater than a hardness H(Sc) at an outermost portion of the center 8. A hardness Ho of the cover 6 is greater than a hardness Hs at a surface of the core 4.

    Abstract translation: 高尔夫球2包括芯4和盖6.芯4包括中心8和包层10，每个由交联的橡胶组合物形成。 中心8和包层10的橡胶组合物中的至少一种包括基础橡胶（a），共交联剂（b），交联引发剂（c）和酸和/或盐（d ）。 共交联剂（b）是：（b1）具有3-8个碳原子的α，β-不饱和羧酸; 或（b2）具有3-8个碳原子的α，β-不饱和羧酸的金属盐。 包层10的最内部的硬度H（Ie）大于中心部8的最外部的硬度H（Sc）。盖6的硬度Ho大于表面的硬度Hs 核心4。

    GOLF BALL
    22.
    发明申请
    GOLF BALL 审中-公开
    高尔夫球

    公开(公告)号：US20130316850A1

    公开(公告)日：2013-11-28

    申请号：US13829223

    申请日：2013-03-14

    Applicant: DUNLOP SPORTS CO., LTD.

    Inventor： Hidetaka INOUE ,  Takahiro SAJIMA

    IPC: A63B37/00

    CPC classification number: A63B37/0092 ,  A63B37/0031 ,  A63B37/0043 ,  A63B37/0054 ,  A63B37/0063 ,  A63B37/0076

    Abstract: A golf ball 2 includes a core 4, an inner cover 8, a mid cover 10, and an outer cover 12. Nine points are determined by dividing a region from a central point of the core 4 to a surface of the core 4 at intervals of 12.5% of a radius of the core 4. When distances (%) from the central point to the nine points and hardnesses at the nine points are plotted in a graph, R2 of a linear approximation curve obtained by a least-square method is equal to or greater than 0.95. A hardness Hi of the inner cover 8 is greater than a hardness Hs at the surface of the core 4. A hardness Ho of the outer cover 12 is greater than the hardness Hi. A difference (Hi−Hs) is 1 or greater. A difference (Ho−Hi) is 5 or greater but 30 or less.

    Abstract translation: 高尔夫球2包括芯4，内盖8，中盖10和外盖12.通过将芯4的中心点的区域与芯4的表面间隔开来确定九个点 为核心部分半径的12.5％。在图中绘制从中心点到九点的距离（％）和九点处的硬度，通过最小二乘法得到的线性近似曲线的R2为 等于或大于0.95。 内盖8的硬度Hi大于芯体4表面的硬度Hs。外盖12的硬度Ho大于硬度H 1。 差值（Hi-Hs）为1以上。 差（Ho-Hi）为5以上且30以下。

    GOLF BALL
    23.
    发明申请
    GOLF BALL 审中-公开
    高尔夫球

    公开(公告)号：US20130184101A1

    公开(公告)日：2013-07-18

    申请号：US13724069

    申请日：2012-12-21

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Hidetaka INOUE ,  Takahiro SAJIMA

    IPC: A63B37/00

    CPC classification number: A63B37/0092 ,  A63B37/0051 ,  A63B37/0054 ,  A63B37/0075 ,  A63B37/0076

    Abstract: A golf ball 2 includes a core 4 and a cover 6 that is composed of an inner cover 8 and an outer cover 10. The core 4 has a radius of R (mm). A hardness Hs at a surface of the core 4 is greater than a hardness HL(R) when a linear approximation curve obtained by plotting a midpoint of each layer of the cover 6 in a thickness direction thereof in a graph in which a horizontal axis indicates a distance (mm) from a central point of the core 4 and a vertical axis indicates a hardness is represented by the following mathematical formula (I): HL(X)=A*X+B  (I), where X represents a distance (mm) from the central point of the core 4, HL(X) represents a hardness, and A and B represent a gradient and an intercept, respectively, of the linear approximation curve.

    Abstract translation: 高尔夫球2包括芯部4和由内盖8和外盖10组成的盖6.芯部4具有R（mm）的半径。 芯线4的表面的硬度Hs大于硬度HL（R），当通过在横轴表示的曲线图中绘制盖6的各层的中点在其厚度方向上绘制的线性近似曲线 与芯4的中心点的距离（mm）和纵轴表示硬度由以下数学公式（I）表示：HL（X）= A * X + B（I）其中，X表示距离 （mm），HL（X）表示硬度，A和B分别表示线性近似曲线的梯度和截距。

    GOLF BALL
    25.
    发明申请
    GOLF BALL 审中-公开

    公开(公告)号：US20180178074A1

    公开(公告)日：2018-06-28

    申请号：US15842263

    申请日：2017-12-14

    Applicant: Dunlop Sports Co. Ltd.

    Inventor： Toshiyuki TARAO ,  Kazuya KAMINO ,  Mami TANAKA ,  Hidetaka INOUE

    IPC: A63B37/00

    CPC classification number: A63B37/0022 ,  A63B37/0031 ,  A63B37/0043 ,  A63B37/0073 ,  A63B37/0074 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/0092 ,  A63B37/0096

    Abstract: An object of the present invention is to provide a golf ball having good spin performance on approach shots and good shot feeling as well as excellent stain resistance by precisely controlling physical properties of a paint film actually formed on a surface of a golf ball body. The present invention provides a golf ball comprising a golf ball body and a paint film formed on a surface of the golf ball body, wherein the paint film is such that a linear approximation curve obtained by a least square method has a slope in an absolute value ranging from 0.0001 to 0.0020 when a loss tangent tan δ thereof measured by a nanoindentation method is plotted as a vertical axis against a measuring frequency (Hz) as a horizontal axis, and that an elastic modulus thereof measured by a nanoindentation method ranges from 0.040 GPa to 0.600 GPa.

    GOLF BALL
    28.
    发明申请
    GOLF BALL 审中-公开

    公开(公告)号：US20180147451A1

    公开(公告)日：2018-05-31

    申请号：US15786071

    申请日：2017-10-17

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Kazuya KAMINO ,  Hidetaka INOUE ,  Toshiyuki TARAO

    IPC: A63B37/00 ,  G01N3/42 ,  C08J7/04 ,  B32B25/08 ,  B32B25/16

    Abstract: A golf ball 2 includes a main body 4 and a paint layer 6 positioned outside the main body 4. The main body 4 includes a spherical core 8, a mid layer 10 positioned outside the core 8, and a cover 12 positioned outside the mid layer 10. An indentation depth, measured when the paint layer 6 in a cross-section along a plane passing through a central point of the golf ball 2 is pressed by a force of 30 mgf in a direction perpendicular to the cross-section, is not less than 300 nm and not greater than 3000 nm. The paint layer 6 preferably has a thickness of not less than 5 μm and not greater than 50 μm.

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