Patent ID: 6431998
Filing Date: 2002-08-13
Classification: A63B

Abstract:
A solid golf ball comprising: a solid core and a cover that encloses the solid core, the solid core having a multilayer construction which includes a center core and an outer core that encloses the center core, whereinthe center core is composed primarily of a resin and has a diameter d and a specific gravity G which satisfy the relationships (i)-(ii): (i)3&lE;d(mm)&lE;13, and (ii)(0.014d+0.929)&lE;G&lE;1.5, the center core has a Shore D hardness of 40 to 95 at the surface thereon, and the outer core has a Shore D hardness at an innermost layer thereof which is formed of a rubber base material, a thermoplastic resin base material, or a mixture of rubber with a thermoplastic resin which is at least 10 unitslower than the Shore D hardness at the surface of the center core.