GOLF BALL
First Claim
1. A golf ball comprising a golf ball body and a paint film formed on a surface of the golf ball body, wherein the paint film is such that a linear approximation curve obtained by a least square method has a slope in an absolute value ranging from 0.0001 to 0.0020 when a loss tangent tan δ
- of the paint film in a state of being formed on the surface of the golf ball body measured by the following measuring condition 1 is plotted as a vertical axis against a measuring frequency (Hz) as a horizontal axis, and that an elastic modulus of the paint film in the state of being formed on the surface of the golf ball body measured by the following measuring condition 2 ranges from 0.040 GPa to 0.600 GPa;
<
Measuring condition 1>
Measuring apparatus;
“
11950 Tribo Indenter”
available from Hysitron, Inc.Indenter specification;
Berkovich typeTest load (maximum indenting load);
100 μ
NFrequency;
1 Hz, 10 Hz, 105 HzMeasuring environment;
23°
C., RH 50%, in the atmosphere;
<
Measuring condition 2>
Measuring apparatus;
“
TI950 Tribo Indenter”
available from Hysitron, Inc.Indenter specification;
Berkovich typeMaximum indenting depth;
300 nmMeasuring environment;
23°
C., RH 50%, in the atmosphere.
2 Assignments
0 Petitions
Accused Products
Abstract
An object of the present invention is to provide a golf ball having good spin performance on approach shots and good shot feeling as well as excellent stain resistance by precisely controlling physical properties of a paint film actually formed on a surface of a golf ball body. The present invention provides a golf ball comprising a golf ball body and a paint film formed on a surface of the golf ball body, wherein the paint film is such that a linear approximation curve obtained by a least square method has a slope in an absolute value ranging from 0.0001 to 0.0020 when a loss tangent tan δ thereof measured by a nanoindentation method is plotted as a vertical axis against a measuring frequency (Hz) as a horizontal axis, and that an elastic modulus thereof measured by a nanoindentation method ranges from 0.040 GPa to 0.600 GPa.
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Citations
19 Claims
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1. A golf ball comprising a golf ball body and a paint film formed on a surface of the golf ball body, wherein the paint film is such that a linear approximation curve obtained by a least square method has a slope in an absolute value ranging from 0.0001 to 0.0020 when a loss tangent tan δ
- of the paint film in a state of being formed on the surface of the golf ball body measured by the following measuring condition 1 is plotted as a vertical axis against a measuring frequency (Hz) as a horizontal axis, and that an elastic modulus of the paint film in the state of being formed on the surface of the golf ball body measured by the following measuring condition 2 ranges from 0.040 GPa to 0.600 GPa;
<
Measuring condition 1>Measuring apparatus;
“
11950 Tribo Indenter”
available from Hysitron, Inc.Indenter specification;
Berkovich typeTest load (maximum indenting load);
100 μ
NFrequency;
1 Hz, 10 Hz, 105 HzMeasuring environment;
23°
C., RH 50%, in the atmosphere;<
Measuring condition 2>Measuring apparatus;
“
TI950 Tribo Indenter”
available from Hysitron, Inc.Indenter specification;
Berkovich typeMaximum indenting depth;
300 nmMeasuring environment;
23°
C., RH 50%, in the atmosphere. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- of the paint film in a state of being formed on the surface of the golf ball body measured by the following measuring condition 1 is plotted as a vertical axis against a measuring frequency (Hz) as a horizontal axis, and that an elastic modulus of the paint film in the state of being formed on the surface of the golf ball body measured by the following measuring condition 2 ranges from 0.040 GPa to 0.600 GPa;
Specification