发明名称 |
Golf ball |
摘要 |
The present invention is directed to a golf ball having a center, an envelope layer, an intermediate layer and a cover, wherein the intermediate layer has a thickness less than 1.2 mm, the envelope layer has a hardness Hs of 60 or more, the intermediate layer has a hardness Hm from 40 to 60, and the cover has a hardness Hc less than 40 in Shore D hardness, and the hardness Hs, Hm and Hc satisfy a following mathematical expression: Hs>Hm>Hc, and the intermediate layer composition has a flexural modulus from 150 MPa to 450 MPa, a maximum loss factor (tan δ) between −20° C. and 0° C. of 0.08 or less, a rebound resilience of 55% or more. |
申请公布号 |
US8790197(B2) |
申请公布日期 |
2014.07.29 |
申请号 |
US201213401169 |
申请日期 |
2012.02.21 |
申请人 |
SRI Sports Limited |
发明人 |
Okabe Satoko;Kamino Kazuya |
分类号 |
A63B37/04 |
主分类号 |
A63B37/04 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. A golf ball having a center, an envelope layer disposed outside the center, an intermediate layer disposed outside the envelope layer and a cover disposed outside the intermediate layer,
wherein the intermediate layer has a thickness Tm less than 1.2 mm, the envelope layer has a Shore D hardness Hs of 60 or more, the intermediate layer has a Shore D hardness Hm in a range from 40 to 60, and the cover has a Shore D hardness Hc less than 40, and the hardness Hs, Hm and Hc satisfy a following mathematical expression: Hs>Hm>Hc, and wherein the intermediate layer is formed from an intermediate layer composition having a flexural modulus ranging from 150 MPa to 450 MPa, a maximum loss factor (tan δ) between −20° C. and 0° C. of 0.08 or less, and a rebound resilience of 55% or more, and the intermediate layer composition comprises, as a resin component, 30 mass % to 70 mass % of (A) a modified polyester elastomer having a Shore A hardness of 95 or less; 70 mass % to 30 mass % of (B) a binary ionomer resin having a Shore D hardness of 65 or more, a flexural modulus of 300 MPa or more, and a melt flow rate (190° C., 2.16 kg) of 1.0 g/10 min or more; and 0 mass % to 50 mass % of (C) a thermoplastic resin other than (A) component and (B) component (provided that a total content of (A) component, (B) component, and (C) component is 100 mass %). |
地址 |
Kobe JP |