Multi-piece solid golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorHideo Watanabe
Life of this patent
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Abstract
In a multi-piece solid golf ball comprising a solid core, an intermediate layer, and a cover, the solid core is formed mainly of an organosulfur compound-containing base rubber, the intermediate layer is formed mainly of a base resin containing at least 50% by weight of a polyurethane elastomer, the cover is formed mainly of a polyurethane elastomer, and the Shore D hardnesses of the layers are controlled. The golf ball has excellent travel distance and feel as well as improved scuff resistance and durability to repeated impact.
Claims8
A multi-piece solid golf ball comprising a solid core, at least one intermediate layer enclosing the solid core, and a cover enclosing the intermediate layer, wherein
- the solid core is formed mainly of a base rubber containing an organosulfur compound,
- the intermediate layer is formed mainly of a base resin containing at least 50% by weight of a polyurethane elastomer,
- the cover is formed mainly of a polyurethane elastomer,
- the intermediate layer and the cover have Shore D hardnesses that meet 0<[(cover Shore D hardness)−(intermediate layer Shore D hardness)]≦20, and
- the total gage of the intermediate layer and the cover is up to 3.7 mm.
A multi-piece solid golf ball comprising a solid core, at least one intermediate layer enclosing the solid core, and a cover enclosing the intermediate layer, wherein
- the solid core is formed mainly of a base rubber containing an organosulfur compound,
- the intermediate layer is formed mainly of a base resin containing at least 50% by weight of a polyurethane elastomer,
- the cover is formed mainly of a polyurethane elastomer,
- the solid core on its surface and the intermediate layer have Shore D hardnesses that meet 0<[(intermediate layer Shore D hardness)−(solid core surface Shore D hardness)]≦10, and
- the intermediate layer and the cover have Shore D hardnesses that meet 0<[(intermediate layer Shore D hardness)−(cover Shore D hardness)]≦10.
Dependencies are inferred from the claim text.