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 a reduced spin rate on shots with a driver (W#1) 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 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 cross-sectional hardness (a) is in the range of 30 to 60, the cross-sectional hardness (b) is in the range of 45 to 58, the value (b)−(a) is in the range of 0 to 40, the value (d)−(c) is in the range of 20 to 40, the value (a) +(b) +(c) +(d) is in the range of 245 to 300, and the ratio between the value (d)−(c) and the value (b)−(a), expressed as [(d)−(c)]/[(b)−(a)], is from 4 to 10.