| 发明名称 |
GOLF BALL |
| 摘要 |
The present invention provides a golf ball that achieves a low spin rate on driver shots to thereby improve flight distance performance, and also has improved durability, especially at high clubhead speeds. The present invention relates to a golf ball including a core, at least one middle layer covering the core, and a cover covering the middle layer, wherein at least one piece or layer of the middle layer includes a material for a middle layer that includes a thermoplastic polyurethane with a slab hardness of 65 to 80 in Shore D hardness and a ratio of upper yield stress (MPa) to lower yield stress (MPa) of not more than 1.60. |
| 申请公布号 |
US2014323242(A1) |
申请公布日期 |
2014.10.30 |
| 申请号 |
US201414264138 |
申请日期 |
2014.04.29 |
| 申请人 |
Dunlop Sports Co. Ltd. |
发明人 |
INOUE Hidetaka;TARAO Toshiyuki |
| 分类号 |
A63B37/00 |
主分类号 |
A63B37/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A golf ball, comprising
a core, at least one middle layer covering the core, and a cover covering the middle layer, wherein at least one piece or layer of the middle layer comprises a material for a middle layer that comprises a thermoplastic polyurethane with a slab hardness of 65 to 80 in Shore D hardness and a ratio of upper yield stress (MPa) to lower yield stress (MPa) of not more than 1.60. |
| 地址 |
Kobe-shi JP |
