Golf ball

Abstract

A golf ball of the present invention includes: a core located in the center of the golf ball; a cover which surrounds the outside of the core and has a plurality of dimples on the surface thereof; and a coating layer located between the core and the cover. The coating layer is formed of a material having rubber elasticity. The μ hardness of the golf ball is preferred to be approximately 3.0 or more and the cover is preferred to have a hardness of approximately 50 or more in terms of Shore D hardness. The intermediate layer is preferred to have a hardness of approximately 40 to approximately 65 in terms of Shore D hardness, and the hardness of the cover is preferred to be higher than the hardness of the intermediate layer.

What is claimed is: 
     
         1 . A golf ball comprising:
 a core located in a center of the golf ball;   a cover that surrounds an outside of the core and has a plurality of dimples on the surface thereof; and   a coating layer located between the core and the cover, the coating layer being formed of a material having rubber elasticity.   
     
     
         2 . The golf ball according to  claim 1 , further comprising an intermediate layer located between the core and the cover, wherein the coating layer is located between the core and the intermediate layer or between the intermediate layer and the cover. 
     
     
         3 . The golf ball according to  claim 1 , wherein the golf ball has a μ hardness of at least 3.0, and wherein the cover has a hardness of at least approximately 50 in terms of Shore D hardness. 
     
     
         4 . The golf ball according to  claim 2 , wherein the intermediate layer has a hardness of approximately 40 to 65 in terms of Shore D hardness and the hardness of the cover is higher than the hardness of the intermediate layer. 
     
     
         5 . The golf ball according to  claim 1 , wherein the coating layer has a thickness of approximately 10 to approximately 150 μm. 
     
     
         6 . The golf ball according to  claim 1 , wherein a material used for forming the coating layer has a Young's modulus of approximately 70 MPa. 
     
     
         7 . The golf ball according to  claim 1 , wherein the material used for forming the coating layer has a Poisson's ratio of at least approximately 0.45. 
     
     
         8 . The golf ball according to  claim 1 , wherein the coating layer has a hardness of at most approximately 70 in terms of JIS-C hardness. 
     
     
         9 . The golf ball according to  claim 1 , wherein the cover comprises ionomer resin.