Patent ID: 7871342
Filing Date: 2011-01-18
Classification: A63B

Abstract:
1. A golf ball consisting of a core and a cover, wherein the core has an overall diameter of from 1.400 inches to 1.660 inches and consists of: an inner core layer having a diameter of from 0.125 inches to 0.750 inches, an outer surface hardness of 70 Shore C or greater, and formed from a first HNP composition, the first HNP composition having a material hardness of 45 Shore D or greater and comprising a highly neutralized ethylene/(meth)acrylic acid copolymer; and an outer core layer having an outer surface hardness less than the outer surface hardness of the inner core layer, and formed from a second HNP composition, the second HNP composition having a material hardness of 55 Shore D or less and comprising a highly neutralized ethylene/(meth)acrylic acid/alkyl (meth)acrylate copolymer.