Title:
ゴルフボール
Document Type and Number:
Japanese Patent JP5154534
Kind Code:
B2
Abstract:
Golf ball 2 has spherical core 4, mid layer 6 situated on the external side of the core 4, and cover 8 situated on the external side of the mid layer 6. The mid layer 6 is constituted with a resin composition. This resin composition contains 100 parts by weight of an ionomer resin (A) and 25 parts by weight or more and 100 parts by weight or less of a fatty acid metal salt (B). This ionomer resin (A) is a neutralized product of a ternary copolymer of ethylene, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester, with a metal ion. The fatty acid metal salt (B) has 18 to 30 carbon atoms. The weight Wm of the mid layer 6 is greater than the weight Wc of the cover 8. The sum (Tm+Tc) of the thickness Tm of the mid layer 6 and the thickness Tc of the cover 8 is 1.0 mm or greater and 3.0 mm or less.
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Inventors:
Ichikawa Kazuhiko
Takahiro Shigemitsu
Takahiro Shigemitsu
Application Number:
JP2009293742A
Publication Date:
February 27, 2013
Filing Date:
December 25, 2009
Export Citation:
Assignee:
Dunlop Sports Co., Ltd.
International Classes:
A63B37/00
Domestic Patent References:
| JP2006289060A | ||||
| JP2004097802A | ||||
| JP2001120686A | ||||
| JP2000093557A | ||||
| JP2002514112A | ||||
| JP2005066040A | ||||
| JP2000157646A |
Foreign References:
| US5306760 | ||||
| US5312857 |
Attorney, Agent or Firm:
Kengo Oka