Golf ball with multiple cover layers
First Claim
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1. A golf ball comprising:
- a core;
a cover disposed about the core, consisting essentially of;
an inner cover layer having a first hardness, a first coefficient of friction, and a first flexural modulus, wherein the inner cover comprises a first polyurethane; and
an outer cover layer disposed on the inner cover having a second hardness, a second coefficient of friction, and a second flexural modulus, wherein the second hardness differs from the first hardness by about 5 points or less, wherein the second coefficient of friction is greater than the first coefficient of friction, and wherein the outer cover layer comprises a second polyurethane.
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Abstract
A golf ball having a core and two or more cover layers, wherein the multiple cover layers are formed from materials that are substantially the same composition with the same Shore hardness, but are modified in some way to alter the processing or performance characteristics of the golf ball, or the layers have the same hardness and at least one cover layer is formed of a polymer blend including a polyurethane composition, and at least one cover layer is formed of a different polymer blend.
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Citations
20 Claims
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1. A golf ball comprising:
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a core; a cover disposed about the core, consisting essentially of; an inner cover layer having a first hardness, a first coefficient of friction, and a first flexural modulus, wherein the inner cover comprises a first polyurethane; and an outer cover layer disposed on the inner cover having a second hardness, a second coefficient of friction, and a second flexural modulus, wherein the second hardness differs from the first hardness by about 5 points or less, wherein the second coefficient of friction is greater than the first coefficient of friction, and wherein the outer cover layer comprises a second polyurethane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A golf ball comprising:
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a core; a cover disposed about the core, consisting essentially of; an inner cover layer having a first hardness, a first coefficient of friction, and a first flexural modulus, wherein the inner cover layer is formed from a polyurethane material; and an outer cover layer disposed about the inner cover having a second hardness, a second coefficient of friction, and a second flexural modulus, wherein the second hardness differs from the first hardness by about 3 points or less, wherein the second coefficient of friction is greater than the first, wherein the second flexural modulus differs from the first flexural modulus by about 5,000 psi or less, and wherein the outer cover layer is formed from a castable reactive liquid material. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification