Three-piece solid golf ball

Abstract

The present invention provides a three-piece solid golf ball, of which flight distance is improved by accomplishing high launch angle and low spin amount in initial flight performance, while maintaining soft and good shot feel when hitting at low head speed. The present invention relates to a three-piece solid golf ball comprising a center, intermediate layer and cover, wherein the center has a deformation amount of 3.0 to 5.5 mm, the maximum hardness difference from the center point to the surface of not more than 7 and a surface hardness H S of 36 to 50, base resins of the intermediate layer and cover are formed from thermoplastic resin, and the intermediate layer has a hardness H M of 36 to 50, the cover has a hardness H L of 58 to 69, H S is higher than H M by 0 to 15, and H L is higher than H M by 10 to 28.

What is claimed is:  
     
         1 . A three-piece solid golf ball comprising a center, an intermediate layer formed on the center and a cover covering the intermediate layer, wherein 
 the center has a deformation amount of 3.0 to 5.5 mm, when applying from an initial load of 98 N to a final load of 1275 N, the maximum hardness difference in Shore D hardness from the center point to the surface of not more than 7, and a surface hardness (H S ) in Shore D hardness of 36 to 50,    a base resin of the intermediate layer is formed from thermoplastic resin, and the intermediate layer has a hardness (H M ) in Shore D hardness of 36 to 50,    a base resin of the cover is formed from thermoplastic resin, and the cover has a hardness (H L ) in Shore D hardness of 58 to 69,    the surface hardness of the center (H S ) is higher than the hardness of the intermediate layer (H M ) by 0 to 15, and the hardness of the cover (H L ) is higher than the hardness of the intermediate layer (H M ) by 10 to 28.    
     
     
         2 . The three-piece solid golf ball according to  claim 1 , wherein the intermediate layer has a thickness of 1.0 to 1.8 mm, and the cover has a thickness of 1.0 to 2.5 mm.  
     
     
         3 . The three-piece solid golf ball according to  claim 1 , wherein a thickness of the cover is not less than that of the intermediate layer.  
     
     
         4 . The three-piece solid golf ball according to  claim 1 , wherein the base resin of the intermediate layer is formed from thermoplastic resin having a weight ratio of thermoplastic elastomer to ionomer resin of 20/80 to 70/30, and the base resin of the cover is formed from thermoplastic resin mainly comprising ionomer resin.  
     
     
         5 . The three-piece solid golf ball according to  claim 1 , wherein the base resin of the intermediate layer is formed from thermoplastic resin having a weight ratio of thermoplastic elastomer to ionomer resin of 20/80 to 50/50, and the base resin of the cover is formed from thermoplastic resin mainly comprising ionomer resin.