Golf balls having a multi-layered cover with a thermoplastic inner cover layer
First Claim
1. A golf ball consisting essentially of:
- an inner core layer formed from a first thermoset rubber composition and having a diameter of 1.2 inches or greater, a center hardness (Hcenter material) of 60 Shore C or greater, and an outer surface hardness (Hcenter surface) of 80 Shore C or greater;
an intermediate core layer formed from a second thermoset rubber composition having a material hardness (Hintermediate core material) of 83 Shore C or greater;
an outer core layer formed from a highly neutralized polymer composition and having a material hardness (Houter core material) of 35 Shore D or greater, wherein the inner core, intermediate core, and outer core layers form a core structure having a diameter of 1.40 to 1.55 inches;
an inner cover layer formed from a thermoplastic composition having a material hardness (Hinner cover material) of 95 Shore C or less; and
an outer cover layer formed from a composition selected from the group consisting of polyurethanes, polyureas, and copolymers and blends thereof.
3 Assignments
0 Petitions
Accused Products
Abstract
Multi-piece golf balls having a multi-layered solid core and multi-layered cover are provided. In one version, a six-piece ball having a three-layered core and three-layered cover is formed. Preferably, the inner core is made of a thermoset rubber composition, the intermediate core layer is made of a thermoplastic composition, and the outer core layer is made of a highly neutralized polymer (HNP) composition. The cover includes inner, intermediate, and outer cover layers, wherein the outer cover is made of a composition comprising a polyurethane, polyurea, or copolymer or blend thereof. In a second version, a five-piece ball having a two-layered core and three-layered cover is produced. The finished balls have high resiliency and rebounding properties.
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Citations
10 Claims
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1. A golf ball consisting essentially of:
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an inner core layer formed from a first thermoset rubber composition and having a diameter of 1.2 inches or greater, a center hardness (Hcenter material) of 60 Shore C or greater, and an outer surface hardness (Hcenter surface) of 80 Shore C or greater; an intermediate core layer formed from a second thermoset rubber composition having a material hardness (Hintermediate core material) of 83 Shore C or greater; an outer core layer formed from a highly neutralized polymer composition and having a material hardness (Houter core material) of 35 Shore D or greater, wherein the inner core, intermediate core, and outer core layers form a core structure having a diameter of 1.40 to 1.55 inches; an inner cover layer formed from a thermoplastic composition having a material hardness (Hinner cover material) of 95 Shore C or less; and an outer cover layer formed from a composition selected from the group consisting of polyurethanes, polyureas, and copolymers and blends thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification