Invention Grant
- Patent Title: Golf ball
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Application No.: US16234274Application Date: 2018-12-27
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Publication No.: US10463920B2Publication Date: 2019-11-05
- Inventor: Hidetaka Inoue , Kazuya Kamino , Toshiyuki Tarao , Mami Tanaka
- Applicant: Sumitomo Rubber Industries, Ltd.
- Applicant Address: JP Kobe-Shi, Hyogo
- Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
- Current Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
- Current Assignee Address: JP Kobe-Shi, Hyogo
- Agency: Birch Stewart Kolasch & Birch LLP
- Priority: JP2017-252822 20171228
- Main IPC: A63B37/00
- IPC: A63B37/00 ; A63B102/32 ; C08L75/04

Abstract:
An object of the present invention is to provide a golf ball that can strike a good balance in approach performance under a rough condition and a wet condition while maintaining a flight distance on driver shots. 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 golf ball body has a spherical core, an intermediate layer covering the spherical core, and a cover covering the intermediate layer, and the paint film has a multi-layered construction composed of two or more layers, wherein a 10% elastic modulus (Pi10) of an innermost layer of the paint film is greater than a 10% elastic modulus (Po10) of an outermost layer of the paint film and a 10% elastic modulus (C10) of a material constituting the cover, and a thickness (Ti) of the innermost layer of the paint film is greater than a thickness (To) of the outermost layer of the paint film, a 10% elastic modulus (M10) of a material constituting the intermediate layer is greater than the 10% elastic modulus (C10) of the material constituting the cover, and a difference (Po10−C10) between the 10% elastic modulus (Po10) of the outermost layer of the paint film and the 10% elastic modulus (C10) of the material constituting the cover is −4.0 kgf/cm2 or more and 50 kgf/cm2 or less, and a Shore D hardness (Hc) of the material constituting the cover is 40 or less.
Public/Granted literature
- US20190201748A1 GOLF BALL Public/Granted day:2019-07-04
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