MULTI-LAYER CORE GOLF BALL

摘要

Golf balls having a very high positive gradient multilayer core are provided. The multilayer core includes an outer core layer and a very soft, low compression inner core layer. The inner core layer is formed from an unfoamed composition and has a center hardness that is at least 40 Shore C points less than the outer surface hardness of the outer core layer.

主权项

1. A golf ball comprising a core and a cover, wherein the core comprises:
a solid inner core layer formed from an unfoamed composition and having a diameter of 1.10 inches or less, a center Shore C hardness (Hcenter) of 15 or less, and an interface Shore C hardness (Hinner core interface) of from 5 to 35; one or more optional intermediate core layers; and an outer core layer having a thickness of 0.20 inches or greater, an inner surface Shore C hardness (Houter core inner surface) of from 40 to 75, and an outer surface Shore C hardness (Houter surface) of 80 or greater; wherein Houter surface−Hcenter≧70; and wherein the inner core layer has a hardness gradient slope (Sinner core) defined asSinnercore=Hinnercoreinterface-Hcenter12innercorelayerdiameter(ininches), the outer core layer has a hardness gradient slope (Souter core) defined asSoutercore=Houtersurface-Houtercoreinnersurfaceoutercorelayerthickness(ininches),andSoutercore>Sinnercore.