Patent ID: 6790148
Filing Date: 2004-09-14
Classification: A63B

Abstract:
A three piece solid golf ball comprising a core consisting of an inner core and an outer core formed on the inner core, and one layer of cover covering the core,wherein the inner core has a diameter of 32.5 to 38.5 mm and a center hardness in JIS-C hardness of 59 to 67, and is formed from a press molded rubber composition comprising polybutadiene, a co-crosslinking agent, an organic peroxide and a filler, and the JIS-C hardness at a distance of 15 mm from the center point of the inner core is 65 to 85 and is higher than the center hardness by 5 to 20, the outer core has a thickness of 0.5 to 1.8 mm and a surface hardness in JIS-C hardness of 79 to 88, and is formed from a press molded rubber composition comprising polybutadiene, a co-crosslinking agent, an organic peroxide and a filler, and the surface hardness of the outer core is higher than the center hardness of the inner core by 20 to 30, and the cover is formed from a combination of an ionomer resin and at least one of thermoplastic elastomer or diene block copolymer, an amount of the thermoplastic elastomer or diene block copolymer being 1 to 35 parts by weight based on 100 parts by weight of the base resin for the cover, and the cover layer has a thickness of 1.5 to 2.5 mm and a surface hardness in Shore D hardness of 66 to 69.