MULTI-PIECE SOLID GOLF BALL

摘要

In a multi-piece solid golf ball having a core, an envelope layer, an intermediate layer, and a cover with a plurality of dimples formed thereon, the core is formed primarily of a base rubber, the envelope layer and the intermediate layer are formed primarily of synthetic resin materials, and the cover layer is formed primarily of a urethane material. The relationships between, respectively, the surface hardnesses of the envelope layer-encased sphere and the ball, the thicknesses of the intermediate layer and the cover layer, the deflections of the core and the ball, and the initial velocities of the core and various layer-encased spheres of the ball each satisfy specific conditions. This golf ball makes it possible for amateur golfers, while maintaining a good distance on shots with a driver (W#1), to obtain a good ball controllability on approach shots and moreover experience a soft feel at impact.

主权项

1. A multi-piece solid golf ball comprising a core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and a cover layer encasing the intermediate layer and having formed on an outer surface thereof a plurality of dimples,
wherein the core is formed primarily of a base rubber, the envelope layer and the intermediate layer are formed primarily of like or unlike synthetic resin materials, the cover layer is formed primarily of a urethane material, and conditions (1) to (4) below are satisfied:(1) surface hardness (Shore D) of envelope layer-encased sphere1.0 mm, where T (mm) is the deflection of the core when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) and M (mm) is the deflection of the ball when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf); and(4) initial velocity (m/s) of core>initial velocity (m/s) of ball.