Golf balls having foam centers with non-uniform core structures

摘要

Golf balls having a solid multi-layered core and a cover are provided. The ball contains an inner core made of a foam composition, an intermediate core layer, and surrounding outer core layer. Preferably, foamed polyurethane is used to form the inner core and polybutadiene rubber is used to make the intermediate and outer cores. The specific gravity (density) of the inner core is preferably less than the density of the intermediate core, which is less than the outer core. The outer surface of the inner core preferably has a non-uniform structure and includes projecting members. The ball preferably has a high Moment of Inertia (MOI). The ball includes a single or multi-layered cover surrounding the core assembly.

主权项

1. A golf ball, comprising a multi-layered core assembly and a cover, the core assembly comprising:
i) an inner core comprising a foamed polyurethane, the inner core having a center and outer surface, and a diameter in the range of about 0.100 to about 1.100 inches, the inner core having a specific gravity (SGinner) and projecting members on the outer surface; ii) an intermediate core layer comprising a non-foamed thermoset or thermoplastic material, the intermediate core having a specific gravity (SGintermediate); and iii) an outer core layer comprising a non-foamed thermoset or thermoplastic material, the outer core layer being disposed about the inner core and having a thickness in the range of about 0.200 to about 0.800 inches, the outer core having a specific gravity (SGouter), wherein the SGouter, is greater than the SGintermediate and the SGintermediate is greater than the SGinner; andthe cover comprising at least one layer disposed about the multi-layered core assembly.