Invention Grant
- Patent Title: Golf ball
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Application No.: US17212335Application Date: 2021-03-25
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Publication No.: US11426635B2Publication Date: 2022-08-30
- Inventor: Hikaru Nagakura , Kazuyoshi Shiga , Kai Hayashi , Takahiro Shigemitsu
- Applicant: Sumitomo Rubber Industries, Ltd.
- Applicant Address: JP Kobe
- Assignee: Sumitomo Rubber Industries, Ltd.
- Current Assignee: Sumitomo Rubber Industries, Ltd.
- Current Assignee Address: JP Kobe
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JPJP2020-057918 20200327
- Main IPC: A63B37/06
- IPC: A63B37/06 ; A63B37/00 ; C08L9/00

Abstract:
An object of the present invention is to provide a golf ball having excellent durability and good shot feeling. The present invention provides a golf ball comprising a core, wherein a difference (crosslinking density at surface of core−crosslinking density at center of core) between a crosslinking density at a surface of the core and a crosslinking density at a center of the core is more than 1.0×102 mol/m3 and less than 9.0×102 mol/m3, and a hardness difference (Hs−Ho) between Hs and Ho is 13.0 or more and 30.0 or less, and the core satisfies H50−Ho>Hs−H50, wherein Hs (Shore C hardness) is a hardness at the surface of the core, Ho (Shore C hardness) is a hardness at the center of the core, and H50 (Shore C hardness) is a hardness at a midpoint between the center of the core and the surface of the core.
Public/Granted literature
- US20210299522A1 GOLF BALL Public/Granted day:2021-09-30
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