Patent ID: 9095748
Filing Date: 2015-08-04
Classification: A63B,C08L

Abstract:
1. A golf ball, comprising: a) an inner core formed from an ionomer composition comprising an ethylene acid copolymer and containing acid groups such that greater than 70% of the acid groups are neutralized; the ionomer composition having a flex modulus of 80,000 psi or less; b) an outer core layer formed from a polyamide composition having a flex modulus of 90,000 psi or greater, the polyamide having a first flex modulus value at 0% relative humidity and 23° C., and a second flex modulus value at 50% relative humidity and 23° C., the difference between the first and second flex modulus values being no greater than 20%, wherein the center of the inner core has a hardness in the range of 30 to 60 Shore D and the surface of the inner core has a surface hardness in the range of 35 to 65 Shore D, and the outer core layer has a surface hardness in the range of 60 to 90 Shore D, the inner core and outer core layer each having a positive hardness gradient, and wherein the surface hardness of the outer core layer is greater than the center hardness of the inner core; and c) a cover having at least one layer.