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    Multi-piece golf ball
    4.
    发明授权
    Multi-piece golf ball 有权

    公开(公告)号：US10427009B2

    公开(公告)日：2019-10-01

    申请号：US14979079

    申请日：2015-12-22

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Takahiro Shigemitsu ,  Hidetaka Inoue ,  Seiji Hayase

    IPC: A63B37/06 ,  A63B37/00

    Abstract: An object of the present invention is to provide a golf ball showing a small ratio of a spin rate on driver shots to a spin rate on approach shots. The present invention provides a multi-piece golf ball comprising a spherical center, three or more envelope layers covering the spherical center, and a cover covering the envelope layers, wherein adjacent two envelope layers are formed so as to include a region composed of elements having a hitting deformation ratio of 30% or more, the hitting deformation ratio being obtained by analyzing a specified golf ball model by a finite element method; and the envelope layer which is radially outwardly positioned of the adjacent two envelope layers has a lowest hardness among all the envelope layers.

    Golf ball
    5.
    发明授权
    Golf ball 有权

    公开(公告)号：US10188911B2

    公开(公告)日：2019-01-29

    申请号：US15783042

    申请日：2017-10-13

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Hidetaka Inoue ,  Kazuya Kamino

    IPC: A63B37/06 ,  A63B37/00 ,  A63B69/36

    Abstract: A golf ball 2 includes a core 4, a mid layer 6, and a cover 8. A hardness H75 at a point to which a distance from a central point of the core 4 is 75% of a radius of the core 4 is greater than a hardness H0 at the central point of the core 4. A difference D1=(H75−H0) is not less than 10.0 and not greater than 27.0 in Shore C hardness. A hardness Hs at a surface of the core 4 is greater than the hardness H75. A difference D2=(Hs−H75) is not less than 0 and not greater than 6.5 in Shore C hardness. The hardness H75 is less than a Shore C hardness HmC of the mid layer 6. A Shore D hardness HmD of the mid layer 6 is greater than a Shore D hardness Hc of the cover 8.

    GOLF BALL
    6.
    发明申请
    GOLF BALL 审中-公开

    公开(公告)号：US20180178075A1

    公开(公告)日：2018-06-28

    申请号：US15854039

    申请日：2017-12-26

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Toshiyuki TARAO ,  Kazuya Kamino ,  Mami Tanaka ,  Hidetaka Inoue

    IPC: A63B37/00

    CPC classification number: A63B37/0022 ,  A63B37/0043 ,  A63B37/0044 ,  A63B37/0062 ,  A63B37/0063 ,  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 a range from 0.0015 to 0.0045 when a storage modulus (GPa) 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 resin composition and golf ball using the same
    10.
    发明授权
    Golf ball resin composition and golf ball using the same 有权
    高尔夫球用树脂组合物和使用高尔夫球的高尔夫球

    公开(公告)号：US09493650B2

    公开(公告)日：2016-11-15

    申请号：US14525916

    申请日：2014-10-28

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Hidetaka Inoue ,  Toshiyuki Tarao ,  Kuniyasu Horiuchi ,  Kazumi Kodama ,  Keiichi Hattori ,  Kotaro Ryuo

    IPC: C08L77/00 ,  C08L23/08 ,  C08K3/34 ,  A63B37/00 ,  C08L77/02 ,  C08K5/09 ,  C08K5/098 ,  C08K5/20

    CPC classification number: C08L77/02 ,  A63B37/0006 ,  A63B37/0024 ,  A63B37/0031 ,  A63B37/0037 ,  A63B37/0039 ,  A63B37/0043 ,  A63B37/0049 ,  A63B37/0051 ,  A63B37/0062 ,  A63B37/0069 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/0094 ,  C08K3/346 ,  C08K5/09 ,  C08K5/098 ,  C08K5/20 ,  C08K9/04 ,  C08L23/0876

    Abstract: An object of the present invention is to provide a golf ball traveling a great flight distance on driver shots and a golf ball resin composition. The present invention provides a golf ball wherein at least one constituting member therefore is formed from a golf ball resin composition containing: (A) a polyamide resin, (B) at least one member selected from the group consisting of (b-1) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (b-2) a metal ion-neutralized product of a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (b-3) a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester, and (b-4) a metal ion-neutralized product of a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester, and (C) an organically modified layered silicate, wherein a mass ratio ((A)/(B)) of (A) component to (B) component ranges from 15/85 to 80/20.

    Abstract translation: 本发明的目的是提供一种在驾驶员镜头上行驶大飞行距离的高尔夫球和高尔夫球树脂组合物。 本发明提供一种高尔夫球，其中至少一个构成构件因此由高尔夫球树脂组合物形成，所述高尔夫球树脂组合物包含：（A）聚酰胺树脂，（B）至少一种选自（b-1）a 由烯烃和具有3-8个碳原子的α，β-不饱和羧酸组成的二元共聚物，（b-2）由烯烃和α，β-不饱和羧酸组成的二元共聚物的金属离子中和产物 具有3至8个碳原子，（b-3）由烯烃，具有3-8个碳原子的α，β-不饱和羧酸和α，β-不饱和羧酸酯组成的三元共聚物和（b-4） ）由烯烃，具有3-8个碳原子的α，β-不饱和羧酸和α，β-不饱和羧酸酯组成的三元共聚物的金属离子中和产物和（C）有机改性的层状硅酸盐 其中，（A）成分与（B）成分的质量比（（A）/（B））为15/85〜 80/20。

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