Golf balls having at least two 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 1.40 inches to 1.62 inches and consists of:
- (a) a center having a diameter of from 0.100 inches to 0.750 inches and a surface hardness of 80 Shore C or greater and formed from a first HNP composition, the first 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;
(b) an intermediate core layer; and
(c) an outer core layer having a surface hardness of 80 Shore C or greater and formed from a second HNP composition, the second HNP composition having a material hardness of 45 Shore D or greater and comprising a highly neutralized ethylene/(meth)acrylic acid copolymer;
wherein the material hardness of the first HNP composition is less than the material hardness of the second HNP composition; and
wherein the intermediate core layer has a surface hardness less than the surface hardness of the center and the surface hardness of the outer core layer.
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Abstract
The present invention is directed to golf balls consisting of a multi-layer core and a cover. The multi-layer core consists of a small, hard center enclosed by a soft intermediate core layer and an outer core layer. The multi-layer core includes at least one layer formed from a relatively soft HNP composition and at least one layer formed from a relatively hard HNP composition.
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10 Claims
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1. A golf ball comprising a core and a cover, wherein the core has an overall diameter of from 1.40 inches to 1.62 inches and consists of:
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(a) a center having a diameter of from 0.100 inches to 0.750 inches and a surface hardness of 80 Shore C or greater and formed from a first HNP composition, the first 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; (b) an intermediate core layer; and (c) an outer core layer having a surface hardness of 80 Shore C or greater and formed from a second HNP composition, the second HNP composition having a material hardness of 45 Shore D or greater and comprising a highly neutralized ethylene/(meth)acrylic acid copolymer; wherein the material hardness of the first HNP composition is less than the material hardness of the second HNP composition; and wherein the intermediate core layer has a surface hardness less than the surface hardness of the center and the surface hardness of the outer core layer. - View Dependent Claims (2, 3, 4, 5)
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6. A golf ball comprising a core and a cover, wherein the core has an overall diameter of from 1.40 inches to 1.62 inches and consists of:
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(a) a center having a diameter of from 0.100 inches to 0.750 inches and a surface hardness of 80 Shore C or greater 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; (b) an intermediate core layer; and (c) an outer core layer having a surface hardness of 80 Shore C or greater 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; wherein the material hardness of the second HNP composition is less than the material hardness of the first HNP composition; and wherein the intermediate core layer has a surface hardness less than the surface hardness of the center and the surface hardness of the outer core layer. - View Dependent Claims (7, 8, 9, 10)
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Specification