Patent ID: 6729974
Filing Date: 2004-05-04
Classification: A63B,C08L

Abstract:
A two-piece golf ball comprising:a core made from a rubber composition containing a main rubber component which mainly contains polybutadiene; and a cover having a thickness of 1.0 to 3.0 mm, said cover being made from a material mainly containing an ionomer resin in which at least one kind of silicone powder selected from a silicone rubber powder, a silicon resin powder, and a composite powder thereof is dispersedly blended; wherein said core has a hardness corresponding to a deflection in a range of 3.3 to 6.0 mm under an applied load of 100 kg; said cover has a Durometer D hardness in a range of 55 to 70; and dimples of the number of 300 to 550 pieces are formed in the surface of said golf ball in such a manner that a dimple total volume ratio VR, which is a ratio of a total of volumes of dimple spaces under planes surrounded by edges of the dimples in the surface of said gold ball to a total volume of a virtual ball as a result of assumption that no dimple is formed in the surface of said golf ball, is in a range of 0.85% or less.