| 摘要 |
The present invention provides a golf ball having a core, an inner cover layer and an outer cover layer. The core is made of a material obtained by molding under heat a rubber composition containing (a) a base rubber containing polybutadiene having a stress relaxation time (T80), (b) an unsaturated carboxylic acid and/or a metal salt thereof, and (c) an organic peroxide. The inner cover layer has a Shore D hardness of from 10 to 60, and the outer cover layer has a Shore D hardness of from 50 to 80 which is higher than the Shore D hardness of the inner cover layer. The golf ball has an excellent rebound overall, a good, soft feel on impact, and can travel further when played.
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