Patent ID: 6712718
Filing Date: 2004-03-30
Classification: A63B,C08L

Abstract:
A three-piece solid golf ball comprising a center, an intermediate layer formed on the center and a cover covering the intermediate layer and having many dimples on the surface thereof, whereinthe center has a maximum hardness difference in Shore D hardness from the central point to the surface of not more than 7 and a surface hardness (HS) of 36 to 50, a base resin of the intermediate layer is formed from thermoplastic resin, and the intermediate layer has a hardness (HM) in Shore D hardness of 36 to 50, a base resin of the cover is formed from thermoplastic resin, and the cover has a hardness (HL) in Shore D hardness of 58 to 69, the surface hardness of the center (HS) is higher than the hardness of the intermediate layer (HM) by up to 15, and the hardness of the cover (HL) is higher than the hardness of the intermediate layer (HM) by 10 to 28, assuming that the total of a periphery length of the dimples is represented by X (mm) and a ratio of the golf ball surface area occupied by the dimples to the total surface area of the golf ball is represented by Y, the X and Y satisfy the correlation represented by the following formula (1) X&lE;1930+3882Yâ€ƒâ€ƒ(1) and Y is within the range of 0.70 to 0.90.