Golf ball

Details Golf ball Golf ball

2007-02-27

2007-02-27

Kim, Eugene (Department: 3711)

Games using tangible projectile

Golf

Ball

C473S370000

Reexamination Certificate

active

10353930

ABSTRACT:
Golf ball1has a core2,a mid layer3and a cover4.The mid layer3comprises a matrix of which base material is a rubber or a synthetic resin, and solid particles which are dispersed in this matrix. Hardness Hg of the solid particles is greater than hardness Hm of the matrix. Difference between both hardness (Hg−Hm) is greater than 5. 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 of the solid particles to the thickness T of the mid layer is equal to or greater than 0.1. A proportion of the solid particles occupied in the mid layer3is 5% by weight or greater and 50% by weight or less. Hardness Hg of the solid particles is equal to or greater than 40. Hardness Hm of the matrix is equal to or greater than 30.

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