Patent ID: 9044644
Filing Date: 2015-06-02
Classification: A63B

Abstract:
1. A solid golf ball comprising a core of at least one layer and a cover of at least one layer, wherein at least one layer of the core is a sphere formed primarily of polybutadiene and includes at least 0.05 part by weight each of (I) a rubber powder obtained by granulating a rubber material containing acrylic acid or a metal salt of acrylic acid and (II) a polyurethane resin powder per 100 parts by weight of rubber component, and at least one layer of the cover is formed primarily of polyurethane, wherein, when A is the JIS-C hardness at a surface of the core, B is the JIS-C hardness at a position 2 mm inside the core surface, C is the JIS-C hardness at a position 5 mm inside the core surface, D is the JIS-C hardness at a position 10 mm inside the core surface, E is the JIS-C hardness at a position 15 mm inside the core surface, and F is the JIS-C hardness at the center of the core, the following hardness relationship is satisfied: A>B<C≧D>E>F.