| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ball for a ball game in which the fly or rolling distance of the ball after a blow can be largely lengthened and the struck ball feeling of the ball is good. <P>SOLUTION: In the ball for the ball game for park golf or ground golf, which consists of a spherical core, which has a hollow part and an enclosure layer which coats the hollow part, and covers of one or more layers, which coat the spherical core part, and has a diameter of 60 mm, the Shore D hardness of the enclosure layer is 57-61, the Shore D hardness of the outermost layer among the covers is 37-50, and the hardness of the enclosure layer is larger than the cover hardness by 7-24 as the Shore D hardness, an ionomer resin is employed as the resin material of the enclosure layer, and a deformation quantity when loaded with 100 kg burden is 1.49-1.87 mm. In the ball for the ball game, the fly or rolling distance of the ball after the blow can be largely lengthened and the struck ball feeling of the ball is good. <P>COPYRIGHT: (C)2011,JPO&INPIT |
