Golf ball
AssigneeSRI Sports Limited
InventorsKeiji Ohama, Seiichiro Endo
Life of this patent
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Abstract
Golf ball 1 has a core 2, a mid layer 3 and a cover 4. The mid layer 3 is composed of a matrix of which base material is a rubber or a synthetic resin, and solid particles which are dispersed in the matrix. Hardness (Shore D) Hm of the matrix is greater than hardness Hg of the solid particles. Difference between both hardness (Hm−Hg) is 5 or greater. Particle size D of the solid particles is 0.5 mm or greater. A ratio “D/T”, i.e., a ratio of the particle size D to the thickness T of the mid layer is 0.1 or greater. A proportion of the solid particles occupied in the mid layer 3 is 3% by weight or greater and 40% by weight or less. Hardness Hm of the matrix is 30 or greater. Hardness Hg of the solid particle is 40 or less.
Claims6
A golf ball having a core, a mid layer and a cover, wherein said mid layer comprises a matrix of which base material is a rubber or a synthetic resin, and solid particles which are dispersed in said matrix and have a particle size D of 0.5 mm or greater, and when it is assumed that Shore D hardness of said matrix be Hm and Shore D hardness of said solid particles be Hg, a value (Hm−Hg) is 5 or greater.
Dependencies are inferred from the claim text.