Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsHideo Watanabe, Hiroyuki Nagasawa
Life of this patent
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Abstract
A golf ball comprising a core and a cover formed of a cover resin composition is characterized in that the core has a hardness corresponding to a compressive deflection amount of at least 3.5 mm when the load applied thereto is increased from an initial load of 10 kgf to a final load of 130 kgf, the cover resin composition has a melt flow rate of at least 3 as measured according to JIS K7210, and the cover has a gage of up to 1.7 mm. The golf ball has a soft feel, offers superior flight performance to even those golf players with a low head speed of 35 m/s or less, and is improved in durability to repeated impact and moldability.
Claims13
A golf ball comprising a core and a cover formed of a cover resin composition, wherein said core has a hardness corresponding to a compressive deflection amount of at least 3.5 mm when the load applied thereto is increased from an initial load of 10 kgf to a final load of 130 kgf, said cover resin composition has a melt flow rate of at least 3 as measured according to JIS K7210, and said cover has a gage of up to 1.7 mm, and
- wherein said cover resin composition comprises (a) at least one component selected from the group consisting of olefin-unsaturated carboxylic acid copolymers, olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester copolymers, and metal ion-neutralized products of these copolymers and (b) a binary copolymer consisting of polyolefin and polyamide components in admixture as a resin component.
A golf ball comprising a core and a cover formed of a cover resin composition, wherein said core is formed of a rubber composition containing polybutadiene synthesized with a rare-earth catalyst as base rubber, and the core has a hardness corresponding to a compressive deflection amount of at least 3.5 mm when the load applied thereto is increased from an initial load of 10 kgf to a final load of 130 kgf, said cover resin composition has a melt flow rate of at least 3 as measured according to JIS K7210, and said cover has a gage of up to 1.7 mm.
A golf ball comprising a core and a cover formed of a cover resin composition, wherein said core has a hardness corresponding to a compressive deflection amount of at least 3.5 mm when the load applied thereto is increased from an initial load of 10 kgf to a final load of 130 kgf, said cover resin composition has a melt flow rate of at least 3 as measured according to JIS K7210, and said cover has a gage of up to 1.7 mm and a Shore D hardness of 59 to 61.
Dependencies are inferred from the claim text.