Golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsKohei Mimura, Toshiyuki Tarao, Hidetaka Inoue
Life of this patent
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Abstract
A golf ball 2 includes a core 4, a cover 8 positioned outside the core 4, and a paint film 10 positioned outside the cover 8. The paint film 10 includes an inner layer 12 and an outer layer 14 positioned outside the inner layer 12. A 10% modulus Mo of the outer layer 14 is lower than a 10% modulus Mi of the inner layer 12. A difference (Mi-Mo) between the modulus Mi and the modulus Mo is not less than 25.0 kgf/cm2. The cover 8 has a Shore D hardness Hc of not less than 50 and not greater than 65. The cover 8 has a thickness Tc of not less than 0.80 mm and not greater than 1.80 mm.
Claims8
A golf ball comprising a core, a cover positioned outside the core, and a paint film positioned outside the cover, wherein
- the paint film includes an inner layer and an outer layer positioned outside the inner layer,
- a 10% modulus Mo of the outer layer is lower than a 10% modulus Mi of the inner layer,
- a difference (Mi-Mo) between the modulus Mi and the modulus Mo is not less than 25.0 kgf/cm2,
- the cover has a Shore D hardness Hc of not less than 50 and not greater than 65, and
- the cover has a thickness Tc of not less than 0.80 mm and not greater than 1.80 mm.
Dependencies are inferred from the claim text.