| 摘要 |
A golf ball is composed of a core layer (1) and a cover layer (3) covering the core layer (1). The cover layer (3) is composed of a synthetic resinous composition whose Young's modulus measured by a split Hopkinson's bar tester lies in the range of 100 Mpa to 350 Mpa both inclusive and whose loss factor measured by the split Hopkinson's bar tester lies in the range of 0.2 to 0.45 both inclusive, when an impact bar of the split Hopkinson's bar tester collides with the golf ball at a speed of 14.0 m/sec. |
