| 摘要 |
<p>PURPOSE: To improve durability of a cover by forming a cover with a composition containing balata and cis 1,4 polybutadiene, each addition quantity of which is within a specified range. CONSTITUTION: This golf ball comprises a cover formed of a composition containing about 95-about 70wt parts (phr) balata and about 5-about 30phr cis 1,4 polybutadiene based on 100wt parts rubber in the composition, and a core. As an additive material to be contained in the cover, rubber of polymer other than balata and cis 1,4 polybutadiene, a dye, an ultraviolet absorber, and an accelerator are added to the composition. Sulfur is used as a vulcanizing agent, and an inorganic filler is used for adding the weight to the golf ball. The inorganic filler is titanium dioxide, barium sulfate and zinc oxide. As a polymer to be added to the composition, cited are polyurethane, polystyrene and natural rubber. Thus, it is possible to obtain a golf ball which has more excellent durability without deterioration of 'a hit sound' and 'touch'.</p> |
