Golf balls having two or more core layers formed from HNP compositions
First Claim
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1. A golf ball comprising a core and a cover, wherein the core has an overall diameter of from 1.400 inches to 1.660 inches and comprises:
- an inner core layer having a diameter of from 0.125 inches to 1.000 inches, an outer surface hardness of from 80 Shore C to 95 Shore C, 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;
an intermediate core layer formed from a rubber composition and having a thickness of from 0.050 inches to 0.400 inches; 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.
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Abstract
The present invention is directed to golf balls consisting of a dual-layer core and a cover. The core consists of an inner core layer formed from a relatively hard HNP composition and an outer core layer formed from a relatively soft HNP composition. The outer core layer has an outer surface hardness less than the outer surface hardness of the inner core layer.
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Citations
7 Claims
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1. A golf ball comprising a core and a cover, wherein the core has an overall diameter of from 1.400 inches to 1.660 inches and comprises:
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an inner core layer having a diameter of from 0.125 inches to 1.000 inches, an outer surface hardness of from 80 Shore C to 95 Shore C, 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; an intermediate core layer formed from a rubber composition and having a thickness of from 0.050 inches to 0.400 inches; 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification