Patent ID: 6592471
Filing Date: 2003-07-15
Classification: A63B

Abstract:
A golf ball, comprising a solid core, a mantle of at least one layer enclosing said solid core, and a cover of at least one layer enclosing said mantle, wherein:said mantle is formed mainly of a thermoplastic elastomer having a Shore D hardness of 30 to 52; said cover is formed of a composition contains 100 parts by weight of a thermoplastic resin as a main component and 11 to 45 parts by weight of barium sulfate being a particulate inorganic filler, and wherein said cover has a specific gravity of from 1.03 to 1.30; said solid core has a JIS C hardness at its surface of at least 10 units greater than a JIS C hardness at its center; said golf ball has an inertia moment of at least 82.5 gÂ·cm2; and said thermoplastic resin in the cover composition has a Shore D hardness of at least 60.