Rubber thread for golf ball and golf ball

Abstract

A golf ball (1) comprises a center (2), a rubber thread layer (3) and a cover (4). The rubber thread layer (3) is formed by winding a drawn rubber thread around the center (2). The rubber thread is obtained by crosslinking a rubber with a sulfur and a vulcanization accelerator. The rubber contains 60% by weight or more of synthetic polyisoprene having a trans 1,4 bond ratio of 2% to 4%. Moreover, the vulcanization accelerator contains 66% by weight or more of a nonbasic vulcanization accelerator and 10% by weight to 30% by weight of an amine type vulcanization accelerator. A weight ratio of an amount of the sulfur to a total amount of the vulcanization accelerator is 0.8/1 to 8/1. The rubber thread rarely causes crystallization during drawing and a thermal deterioration when molding the cover. The golf ball (1) has an excellent resilience performance.

Dependencies are inferred from the claim text.