| 摘要 |
Golf ball 2 has spherical core 4, mid layer 6 situated on the external side of the core 4, and cover 8 situated on the external side of the mid layer 6. The mid layer 6 is constituted with a resin composition. This resin composition contains 100 parts by weight of an ionomer resin (A) and 25 parts by weight or more and 100 parts by weight or less of a fatty acid metal salt (B). This ionomer resin (A) is a neutralized product of a ternary copolymer of ethylene, anα,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and anα,β-unsaturated carboxylic acid ester, with a metal ion. The fatty acid metal salt (B) has 18 to 30 carbon atoms. The weight Wm of the mid layer 6 is greater than the weight Wc of the cover 8. The sum (Tm+Tc) of the thickness Tm of the mid layer 6 and the thickness Tc of the cover 8 is 1.0 mm or greater and 3.0 mm or less. |
