| 摘要 |
PROBLEM TO BE SOLVED: To provide a durable golf ball excellent in long-carrying performance and controllability.SOLUTION: A golf ball comprises: a spherical core 4; an inner intermediate layer 6 located outside the core 4; an outer intermediate layer 8 located outside the inner intermediate layer 6; a reinforcement layer 10 located outside the outer intermediate layer 8; and a cover 12 located outside the reinforcement layer 10. When a distance (%) from the central point of the core 4 and a JIS-C hardness at nine points acquired by sectioning the distance from the central point of the core 4 to the surface at an interval of 12.5% of the radius of the core 4 are plotted on a graph, an Rvalue of a linear approximate curve acquired by a least square method is 0.95 or more. A Shore D hardness Hm2 of the outer intermediate layer 8 is greater than the Shore D hardness Hm1 of the inner intermediate layer 6. A Shore D hardness Hc of the cover is smaller than the hardness Hm2. A hardness Hm1 is less than 50. |
