Multi-piece solid golf ball

摘要

The invention provides a multi-piece solid golf ball having a solid core encased by a cover of one, two or more layers, which ball has specific hardness relationships among various areas on a core cross-section obtained by cutting the solid core in half. The golf ball has both a reduced spin rate and a good initial velocity on shots, particularly when struck in a high head-speed range, and thus is able to achieve an increased distance. A good feel on impact can also be obtained.

主权项

1. A multi-piece solid golf ball comprising a solid core encased by a cover of one, two or more layers, wherein, letting (a) represent a JIS-C cross-sectional hardness at a center of the solid core on a cross-section obtained by cutting the core in half, (b) represent a JIS-C cross-sectional hardness at a position 7 mm from the core center, (c) represent a JIS-C cross-sectional hardness at a position 11 mm from the core center, and (d) represent a JIS-C surface hardness of the core:
the value (a)−(b) is in the range of 0 to 40, the value (d)−(c) is in the range of 0 to 40, and the value (a)+(b)+(c)+(d) is in the range of 245 to 300, and wherein the ratio between the value (d)−(c) and the value (c)−(b), expressed as [(d)−(c)]/[(c)−(b)], is from 3 to 8.