Golf ball comprising a very-low melt flow inner cover layer composition
First Claim
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1. A golf ball comprising:
- a core;
an inner cover layer comprising a thermoplastic composition and having a thickness of about 0.005 inches to 0.40 inches and a surface hardness of about 60 Shore D or greater; and
an outer cover layer comprising a thermoset material and having a thickness of about 0.01 inches to 0.05 inches and a surface hardness of about 60 Shore D or less;
wherein the thermoplastic composition comprises a first melt flow index at 280°
C. under a 10-kg load of less than about 35 g/10 min and a second melt flow index at 265°
C. under a 5-kg load of less than about 10 g/10 min.
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Abstract
A golf ball including a core; an inner cover layer formed from a thermoplastic composition and having a thickness of about 0.005 inches to 0.40 inches and a surface hardness of about 60 Shore D or greater; and an outer cover layer formed from a thermoset material and having a thickness of about 0.01 inches to 0.05 inches and a surface hardness of about 60 Shore D or less. The thermoplastic composition has a first melt flow index at 280° C. under a 10-kg load of less than about 35 g/10 min and a second melt flow index at 265° C. under a 5-kg load of less than about 10 g/10 min.
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Citations
16 Claims
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1. A golf ball comprising:
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a core; an inner cover layer comprising a thermoplastic composition and having a thickness of about 0.005 inches to 0.40 inches and a surface hardness of about 60 Shore D or greater; and an outer cover layer comprising a thermoset material and having a thickness of about 0.01 inches to 0.05 inches and a surface hardness of about 60 Shore D or less; wherein the thermoplastic composition comprises a first melt flow index at 280°
C. under a 10-kg load of less than about 35 g/10 min and a second melt flow index at 265°
C. under a 5-kg load of less than about 10 g/10 min. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A golf ball comprising:
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a core; an inner cover layer comprising a first thermoplastic composition and having a thickness of about 0.005 inches to 0.10 inches and a surface hardness of about 60 Shore D or greater; and an outer cover layer comprising a second thermoplastic composition and having a thickness of about 0.01 inches to 0.05 inches and a surface hardness of about 60 Shore D or less; wherein the first thermoplastic composition has a first melt flow index at 280°
C. under a 10-kg load of less than about 35 g/10 min and a second melt flow index at 265°
C. under a 5-kg load of less than about 10 g/10 min, the first and second melt flow indices being less than a melt flow index of the second thermoplastic composition.
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Specification