| 摘要 |
<p>PURPOSE:To simply manufacture a thread-bound golf ball excellent in the flight performance and having no safety problem unlike a golf ball using a liquid center. CONSTITUTION:Thread rubber is wound on the outside of a solid rubber center to form a thread rubber layer, the outside of the thread rubber layer is covered with a cover layer to form a thread-wound golf ball, the surface hardness of the solid rubber center is set to the JIS-A hardness of 60 or below, and the distortion under the load of 500 (g) is set to 0.5mm or above.</p> |
