Multi-layer core golf ball
Golf balls comprising a multi-layer core and a cover are disclosed. The multi-layer core comprises at least one intermediate core layer formed from a metallic, composite, or inorganic/organic hybrid composition.
1. A golf ball comprising:
an inner core comprising a center formed from a first thermoset composition, wherein the inner core has a diameter of from 1.000 inches to 1.580 inches, a center hardness of from 40 Shore C to 70 Shore C, and a surface hardness of from 50 Shore C to 95 Shore C;
an intermediate core layer having a thickness of from 0.010 inches to 0.070 inches and an outer surface hardness of from 65 Shore D to 95 Shore D and formed from a composition selected from the group consisting of metallic, composite, and inorganic/organic hybrid compositions;
an outer core layer formed from a second thermoset composition and having a thickness of from 0.010 inches to 0.075 inches and an outer surface hardness of from 45 Shore C to 90 Shore C; and
a cover layer having a thickness of from 0.010 inches to 0.050 inches and formed from a composition having a material hardness of from 30 Shore D to 65 Shore D;
wherein the golf ball additionally comprises a thermoplastic core layer disposed between the inner core and the intermediate core layer.
2. The golf ball of claim 1 , wherein the diameter of the inner core is from 1.400 inches to 1.490 inches.
3. The golf ball of claim 1 , wherein the outer surface hardness of the intermediate core layer is from 75 Shore D to 95 Shore D.
4. A golf ball comprising:
an inner core comprising a center formed from a first thermoset composition, wherein the inner core has a diameter of from 1.000 inches to 1.580 inches, a center hardness of from 40 Shore C to 70 Shore C, and a surface hardness of from 50 Shore C to 95 Shore C;
an intermediate core layer having a thickness of from 0.010 inches to 0.070 inches and an outer surface hardness of from 65 Shore D to 95 Shore D and formed from a composition selected from the group consisting of metallic, composite, and inorganic/organic hybrid compositions;
an outer core layer formed from a second thermoset composition and having a thickness of from 0.010 inches to 0.075 inches and an outer surface hardness of from 45 Shore C to 90 Shore C; and
a cover layer having a thickness of from 0.010 inches to 0.050 inches and formed from a composition having a material hardness of from 30 Shore D to 65 Shore D;
wherein the golf ball additionally comprises a thermoplastic core layer disposed between the intermediate core layer and the outer core layer.
5. The golf ball of claim 4 , wherein the diameter of the inner core is from 1.400 inches to 1.490 inches.
6. The golf ball of claim 4 , wherein the outer surface hardness of the intermediate core layer is from 75 Shore D to 95 Shore D.