Golf ball

Abstract

A golf ball formed of multiple layers that allows limiting an uplifting trajectory, providing a trajectory in which the height of the golf ball is well retained in the latter half of the flight of the ball thereby increasing travel distance, where at least one layer is made of a composition of a ternary copolymer ionomer, a higher fatty acid and an inorganic metal compound mixed together, at least 80% of the carboxyl group contained in the composition is neutralized, and the total volume of the dimples (Dv) on the cover surface ranges from 495 to 575 mm 3 . The above composition is suitable for the cover. The higher fatty acid is a fatty acid with 12 to 40 carbon atoms, and preferably is stearic acid or oleic acid.

1 . A golf ball formed of multiple layers, wherein at least one layer is made of a composition of a ternary copolymer ionomer, a higher fatty acid and an inorganic metal compound mixed together, at least 80% of a carboxyl group contained in the composition is neutralized, and a total volume of dimples (Dv) on a cover surface is 495-575 mm 3 .  
     
     
         2 . A golf ball formed of multiple layers, wherein a cover layer is made of a composition of a ternary copolymer ionomer, a higher fatty acid and an inorganic metal compound mixed together, at least 80% of a carboxyl group contained in the composition is neutralized, and a total volume of dimples (Dv) on a cover surface is 495-575 mm 3 .  
     
     
         3 . The golf ball according to  claim 2 , wherein the higher fatty acid is a higher fatty acid with 12-40 carbon atoms.  
     
     
         4 . The golf ball according to  claim 2 , wherein said higher fatty acid is selected from stearic acid or oleic acid, and a metal component of the inorganic metal compound is selected from the group consisting of Na, Zn, Mg, Ca, Li and K.  
     
     
         5 . The golf ball according to  claim 2 , wherein said cover is made of a composition with a Shore D hardness of 40-65.  
     
     
         6 . The golf ball according to  claim 2 , wherein a degree of neutralization of the carboxyl group contained in said composition is no less than 90%.  
     
     
         7 . The golf ball according to  claim 2 , wherein a degree of neutralization of the carboxyl group contained in said composition is 100%.