Golf ball

Abstract

A golf ball is provided which exhibits good rebound performance, long flight distance and favorable anti-flier characteristics and is excellent in hit feeling and controllability. The golf ball is composed of a core and a cover surrounding the core. The cover is formed by vulcanizing a cover composition including thermoplastic elastomer, trans structure-containing rubber and ionomer resin.

What is claimed is:  
     
         1 . A golf ball composed of a core and a cover surrounding the core, said cover being formed by vulcanizing a cover composition including, as its polymer components, thermoplastic elastomer, rubber containing a trans structure, and ionomer resin.  
     
     
         2 . The golf ball according to  claim 1 , wherein 
 a ratio of a weight of said trans structure-containing rubber to a total weight of said thermoplastic elastomer and said ionomer resin is in a range from 70:30 to 20:80, and    a ratio of the weight of said thermoplastic elastomer to the weight of said ionomer resin is in a range from 85:15 to 50:50.    
     
     
         3 . The golf ball according to  claim 1 , wherein said trans structure-containing rubber includes at least one of trans 1,4-polyisoprene rubber, trans 1,4-polybutadiene rubber and trans polyocteneline rubber.  
     
     
         4 . The golf ball according to  claim 1 , wherein said thermoplastic elastomer includes at least one of styrene type thermoplastic elastomer and urethane type thermoplastic elastomer.  
     
     
         5 . The golf ball according to  claim 1 , wherein said ionomer resin is included 5-60 parts by weight with respect to 100 parts by weight of the polymer components in said cover composition.