Patent ID: 6814676
Filing Date: 2004-11-09
Classification: A63B,C08G,C08L

Abstract:
A multi-piece solid golf ball comprising:a solid core formed of a single layer structure; and a cover which has a two-layer structure of an inner layer cover and an outer layer cover and is formed in such a manner as to cover said solid core, said cover having, in its surface, a number of dimples; wherein said inner layer cover is made from a material containing an ionomer resin as a main component and an olefin based elastomer and said outer layer cover is made from a material containing a polyurethane based elastomer as a main component; a surface Shore D hardness of said solid core is in a range of 50 to 60, a Shore D hardness of said inner layer cover is in a range of 53 to 61, and a Shore D hardness of said outer layer cover is in a range of 54 to 58; an average value of the surface Shore D hardness of said solid core, the bore D hardness of said inner layer cover, and the Shore D hardness of the outer layer cover is in a range of 53 to 58; a value obtained by dividing a thickness of said outer layer cover by a thickness of said inner layer cover is in a range of 0.48 to 1.00, and a total of the thickness of said outer layer cover and the thickness of said inner layer cover is in a range of 1.5 mm to 3.5 mm; and a dimple volume occupying ratio VR value is in a range of 0.66% to 0.85%.