Patent ID: 6544131
Filing Date: 2003-04-08
Classification: A63B

Abstract:
A multi-piece solid golf ball comprising a core consisting of an inner core and an outer core formed on the inner core and a cover layer covering the core, whereinthe inner core has a diameter of 35.2 to 37.2 mm and a JIS-C center hardness of 65 to 75, and is formed from press molded rubber composition comprising a polybutadiene, a zinc acrylate co-crosslinking agent, an organic peroxide, and, based on 100 parts by weight of the polybutadiene, 10 to 30 parts by weight of a zinc oxide filler, the outer core has a thickness of 0.8 to 2.0 mm and a JIS-C surface hardness of 75 to 85, and is formed from press molded rubber composition comprising a polybutadiene, a co-crosslinking agent, an organic peroxide, and a filler, and the cover has a thickness of 0.8 to 3.0 mm and a Shore D hardness of 45 to 70, and contains ionomer resin as a base resin, wherein a difference between the JIS-C center hardness of the inner core and the JIS-C surface hardness of the outer core is selected be within the range 0 to 13.