| 摘要 |
<p>PURPOSE: A golf ball is provided to be able to increase the spinning amount of an approach-shot, and to improve the hitting feeling. CONSTITUTION: A golf ball comprises a golf ball body (20) and a coated film prepared on the surface of the golf ball body. The friction coefficient calculated by a contact force tester is 0.35 or more and 0.60 or less. A base material resin comprising the coated film is manufactured by reacting polyol and more than two types of polyisocyanates. The polyisocyanate includes derivatives of hexamethylenediisocyanate (HDI), and derivatives of isophoronediisocyanat(IPDI). The mass ratio of the mixing ratio (HDI derivative/IPDI derivative) of HDI derivative and IPDI derivative is 80/20-50/50. [Reference numerals] (AA) Time (Sec)×10^-3</p> |
