| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf ball for achieving excellent compression characteristics, hitting feeling and spin performance. <P>SOLUTION: The golf ball includes an inner core which has a first outer surface and a geometric center and is formed from a substantially homogenous formulation such that the inner core has a hardness of 35 Shore C to 85 Shore C. An outer core layer is formed around the inner core, has a second outer surface and an inner surface, and is formed from a substantially homogenous formulation such that the outer core layer has a hardness of 55 Shore C to 90 Shore C. A cover layer is disposed about the outer core layer. The hardness of the first outer surface is greater than the hardness of the geometric center to define a "positive hardness gradient", and the hardness of the second outer surface is substantially the same as or lower than the hardness of the inner surface to define a "negative hardness gradient". <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
