Two-piece solid golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorMasatoshi Yokota
Life of this patent
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Abstract
The present invention provides a two-piece solid golf ball having excellent flight performance and good shot feel when hit by a driver, and excellent controllability when hit by an iron club. The present invention relates to a two-piece solid golf comprising a core, and a cover formed on the core, wherein the core has a JIS-C center hardness of not more than 60, a JIS-C surface hardness of 70 to 95, a difference between the center hardness and surface hardness of 20 to 40 and a deformation amount of 2.6 to 3.5 mm when applying from an initial load of 10 kgf to a final load of 130 kgf, and the cover has a Shore D hardness of not more than 60 and a thickness of 1.2 to 2.0 mm.
Claims10
A two-piece golf ball, comprising:
- a core, said core is formed from a rubber composition comprising:
- 20 to 40 parts by weight of a co-crosslinking agent,
- 0.5 to 3.0 parts by weight of an organic peroxide, and
- 0.1 to 5.0 parts by weight of an organic sulfide compound, based on 100 parts by weight of cis-1,4-polybutadiene containing not less than 40% of cis-1,4 bond content as a base rubber;
- and
- a cover formed on the core,
- wherein the core has a diameter of 38.5 to 40.5 mm, a JIS-C center hardness of not more than 60, a JIS-C surface hardness of 70 to 95, a difference between the center hardness and the surface of 20 to 40 and a deformation amount of 2.8 to 3.4 mm when applying from an initial load of 10 kgf to a final load of 130 kgf, and the cover has a Shore D hardness of not more than 60 and a thickness of 1.2 to 2.0 mm.
Dependencies are inferred from the claim text.