Multi-layer golf ball
View Patent ↗Golf balls consisting of a dual core and a single layer cover are disclosed. The dual core consists of an inner core layer formed from a rubber composition and an outer core layer formed from a highly neutralized polymer composition. The Shore C hardness of the outer core layer's outer surface is preferably greater than the material hardness of the inner cover layer, and more preferably is 56 Shore D or greater.
1. A golf ball consisting essentially of the following three layers:
an inner core layer formed from a rubber composition, wherein the inner core layer has a diameter of from 0.750 inches to 1.300 inches, a compression of less than 50, and an outer surface hardness of 60 Shore C or less;
an outer core layer formed from a highly neutralized polymer composition, wherein the outer core layer has an outer surface hardness (H outer core ) of 63 Shore D or greater and a thickness of from 0.140 inches to 0.455 inches;
and a cover layer having a material hardness of 60 Shore D or less;
wherein the inner core layer and the outer core layer have a combined overall diameter of from 1.580 inches to 1.660 inches.
2. The golf ball of claim 1 , wherein the compression of the inner core layer is 20 or less.
3. The golf ball of claim 1 , wherein the compression of the inner core layer is 15 or less.
4. A golf ball consisting essentially of the following three layers:
an inner core layer formed from a rubber composition, wherein the inner core layer has a diameter of from 0.500 inches to 1.300 inches, a compression of less than 30, and an outer surface hardness of 60 Shore C or less;
an outer core layer formed from a highly neutralized polymer composition, wherein the outer core layer has an outer surface hardness (H outer core ) of 63 Shore D or greater and a thickness of from 0.140 inches to 0.580 inches;
and a cover layer having a material hardness of less than 60 Shore D;
wherein the inner core layer and the outer core layer have a combined overall diameter of from 1.580 inches to 1.660 inches.
5. The golf ball of claim 4 , wherein the compression of the inner core layer is 20 or less.
6. The golf ball of claim 4 , wherein the compression of the inner core layer is 15 or less.