Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorAtsushi KOMATSU
Life of this patent
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Abstract
In a golf ball having a core, a cover and at least one intermediate layer therebetween, the cover is formed of a rubber composition which includes a diene rubber, methacrylic acid, a metal oxide and an organic peroxide. The cover has a specific Poisson's ratio, Shore D hardness and thickness. At least one intermediate layer has a specific Shore D hardness and thickness. This golf ball, even with the use of a rubber cover, compares favorably with balls having conventional resin covers, both in that it can achieve a lower spin rate on shots with a driver (W #1) and thus has an excellent flight performance and also in that it can improve controllability in the short game.
Claims5
A golf ball comprising a core, a cover, and at least one intermediate layer interposed therebetween, wherein the cover is formed of a rubber composition comprising:
- (a) a diene rubber,
- (b) methacrylic acid,
- (c) a metal oxide, and
- (d) an organic peroxide;
- the cover has a Poisson's ratio of at least 0.49, a Shore D hardness of not more than 45 and a thickness of not more than 0.6 mm;
- and at least one intermediate layer has a Shore D hardness of at least 60 and a thickness of not more than 2.0 mm.
Dependencies are inferred from the claim text.