Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsKae YAMAZAKI, Tsuyoshi NAKAJIMA, Yuichiro OZAWA
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Abstract
The invention provides a golf ball having a core and a cover of one layer or a plurality of layers, wherein the core is formed of a material molded under heat from a rubber composition containing (A) a base rubber, (B) an organic peroxide, and (C) water and/or a metal monocarboxylate, and has a hysteresis loss of 50% or less when compressed at a load cell speed of 500 mm/min and under a constant load of 5,000 N.
Claims17
A golf ball comprising a core and a cover of one layer or a plurality of layers, wherein the core is formed of a material molded under heat from a rubber composition comprising the following components A to C:
- (A) a base rubber,
- (B) an organic peroxide, and
- (C) water and/or a metal monocarboxylate,
- wherein the golf ball has a hardness at an interior thereof such that a value obtained by subtracting a JIS-C hardness H5.0 at a position 5.0 mm outward from a center of the core and toward a periphery of the core from a JIS-C hardness H15.0 at a position 15.0 mm outward from the core center and toward the core periphery is a positive value and not more than 18.3.
Dependencies are inferred from the claim text.