MULTI-PIECE SOLID GOLF BALL

摘要

In a multi-piece solid golf ball having a core, a cover and an intermediate layer therebetween, the core, an intermediate layer-encased sphere and the ball have surface hardnesses which satisfy a specific relationship, and the intermediate layer and the cover have thicknesses which satisfy a specific relationship. Also, the core has a hardness profile in which the hardnesses at the core surface, core center, a position 5 mm from the core center, and a position midway between the surface and center of the core satisfy specific relationships. This golf ball, when used by mid- and high-level amateurs, enables the golfer to maintain an adequate distance on shots with a driver and achieve a good distance on iron shots, has a good spin performance on approach shots and has a good feel on impact. In addition, the ball has an excellent scuff resistance when struck with a grooved wedge.

主权项

1. A multi-piece solid golf ball comprising a core, a cover and an intermediate layer therebetween,
wherein the core, a sphere composed of the core and the intermediate layer which peripherally encases the core (intermediate layer-encased sphere), and the ball have respective surface hardnesses, expressed in terms of Shore D hardness, which satisfy the relationship
ball surface hardness≦surface hardness of intermediate layer-encased sphere≧core surface hardness; the intermediate layer and the cover have respective thicknesses which satisfy the relationship
(thickness of intermediate layer−thickness of cover)≧0; and the core has a hardness profile which, expressed in terms of JIS-C hardness, satisfies the following relationships:
22≦core surface hardness (Cs)−core center hardness (Cc),5≧[hardness at a position 5 mm from core center (C5)−core center hardness (Cc)]>0, and[core surface hardness (Cs)−core center hardness (Cc)]/[hardness at a position midway between core surface and core center (Cm)−core center hardness (Cc)]≧4.