| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a golf ball, providing a good sensation of striking a ball and a great carry by an appropriate amount of transformation even if struck by a high head speed golfer, and providing a good feeling of striking a ball by an appropriate amount of transformation even if struck by a low head speed golfer. SOLUTION: In a thread-wrapped golf ball made up of a center, a rubber thread layer and a cover, the center comprises an internal layer center 24 to 33 mm in diameter made of a composition whose main component is polysiloxane containing boron atoms in the molecular chain and an external layer center covering the internal layer center, which is made of a galvanized rubber or thermoplastic resin of 60 or less in Shore D hardness, and 25 to 35 mm in diameter.</p> |
