Golf ball

Abstract

An object of the present disclosure is to provide a golf ball that has a high spin rate but does not fly up in a high maximum flying height, thereby having a reduced number of shots into the OB area on a driver shot. The present disclosure provides a golf ball comprising a spherical core, an intermediate layer and an outermost cover, wherein a material hardness Hm (Shore D hardness) of the intermediate layer, a material hardness Hc (Shore D hardness) of the outermost cover, a thickness Tc (mm) of the outermost cover, and a total lower volume Vi (mm 3 ) of a plurality of dimples satisfy Vi>365 and (Hc/Tc)×(Hm/Vi)≤7.5.

1 . A golf ball comprising a spherical core, an intermediate layer positioned outside the spherical core, and an outermost cover positioned outside the intermediate layer and having a plurality of dimples formed thereon, wherein
 a material hardness Hm (Shore D hardness) of the intermediate layer,   a material hardness Hc (Shore D hardness) of the outermost cover,   a thickness Tc (mm) of the outermost cover, and   a total lower volume Vi (mm 3 ) of the plurality of dimples satisfy,
     Vi> 365 and ( Hc/Tc )×( Hm/Vi )≤7.5.
 
   
     
     
         2 . The golf ball according to  claim 1 , wherein Vi≥380. 
     
     
         3 . The golf ball according to  claim 1 , wherein Vi≥400. 
     
     
         4 . The golf ball according to  claim 1 , wherein a surface hardness (Shore C hardness) of the spherical core<a surface hardness (Shore C hardness) of the intermediate layer>a surface hardness (Shore C hardness) of the golf ball is satisfied. 
     
     
         5 . The golf ball according to  claim 1 , wherein the outermost cover contains a polyurethane as a resin component. 
     
     
         6 . The golf ball according to  claim 1 , wherein the value (Hc/Tc) is 30 or more and 75 or less. 
     
     
         7 . The golf ball according to  claim 1 , wherein the value (Hm/Vi) is 0.08 or more and 0.22 or less. 
     
     
         8 . The golf ball according to  claim 1 , wherein a surface hardness Hs of the spherical core ranges from 60 to 95 in Shore C hardness. 
     
     
         9 . The golf ball according to  claim 1 , wherein a center hardness Ho of the spherical core ranges from 45 to 74 in Shore C hardness. 
     
     
         10 . The golf ball according to  claim 1 , wherein the material hardness Hm of the intermediate layer ranges from 50 to 73 in Shore D hardness. 
     
     
         11 . The golf ball according to  claim 1 , wherein a thickness Tm of the intermediate layer ranges from 0.8 mm to 3.0 mm. 
     
     
         12 . The golf ball according to  claim 1 , wherein the material hardness Hc of the outermost cover ranges from 20 to 40 in Shore D hardness. 
     
     
         13 . The golf ball according to  claim 1 , wherein the thickness Tc of the outermost cover ranges from 0.4 mm to 1.0 mm. 
     
     
         14 . The golf ball according to  claim 1 , wherein Vi≤500. 
     
     
         15 . The golf ball according to  claim 1 , wherein a difference (Hms−Hcs) between a surface hardness Hms of the intermediate layer and a surface hardness Hcs of the golf ball is more than 0. 
     
     
         16 . The golf ball according to  claim 1 , wherein a difference (Hms−Hs) between a surface hardness Hms of the intermediate layer and a surface hardness Hs of the spherical core is more than 0.