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US 7,008,334 B2Granted
Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsHideo Watanabe, Hiroyuki Nagasawa
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AssigneeBridgestone Sports Co., Ltd.
InventorsHideo Watanabe, Hiroyuki Nagasawa
Estimating the term…
A golf ball comprising a core and a multilayer cover including at least a cover inner layer and a cover outer layer 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 outer layer is made of a resin composition having organic short fibers incorporated therein, the resin composition has a melt flow rate of at least 3 as measured according to JIS K7210, the cover outer layer has a Shore D hardness of at least 55 and is harder than the cover inner layer, and the cover outer layer has a gage of up to 1.4 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.
A golf ball comprising a core and a multilayer cover including at least a cover inner layer and a cover outer layer, 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 outer layer is made of a resin composition having organic short fibers incorporated therein, said resin composition has a melt flow rate of at least 3 as measured according to JIS K7210, said cover outer layer has a Shore D hardness of at least 55 and is harder than said cover inner layer, and said cover outer layer has a gage of up to 1.4 mm, and
A golf ball comprising a core and a multilayer cover including at least a cover inner layer and a cover outer layer, 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 outer layer is made of a resin composition having organic short fibers incorporated therein, said resin composition has a melt flow rate of at least 4 as measured according to JIS K7210, said cover outer layer has a Shore D hardness of at least 55 and is harder than said cover inner layer, and said cover outer layer has a gage of up to 1.4 mm.
A golf ball comprising a core and a multilayer cover including at least a cover inner layer and a cover outer layer, wherein said core comprises an organosulfur compound or organosulfur compounds and 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 outer layer is made of a resin composition having organic short fibers incorporated therein, said resin composition has a melt flow rate of at least 4 as measured according to JIS K7210, said cover outer layer has a Shore D hardness of at least 55 and is harder than said cover inner layer, and said cover outer layer has a gage of up to 1.4 mm.
Dependencies are inferred from the claim text.