Multilayer solid golf ball

Abstract

The present invention provides a multilayer solid golf ball having an enclosing layer between a core and a cover. The core has a coefficient of restitution (COR) greater than 0.750, and the enclosing layer has a thermal conductivity less than or equal to 0.20 W/m-K. The enclosing layer with low thermal conductivity may reduce the decrease of the COR of the ball in a cold weather that improves the ball control and the flying distance.

1 . A multilayer solid golf ball comprising:
 a core having a coefficient of restitution greater than 0.750;   a cover surrounding said core; and   an enclosing layer, which is provided between said core and said cover, having a thermal conductivity less than or equal to 0.20 W/m-K.   
   
   
       2 . The multilayer solid golf ball as claimed in  claim 1 , further comprising an intermediate layer, which is provided between said enclosing layer and said cover, having an inner surface facing said enclosing layer, wherein said enclosing layer has an outer surface contacting said inner surface of said intermediate layer. 
   
   
       3 . The multilayer solid golf ball as claimed in  claim 2 , wherein said enclosing layer has an inner surface, and said core has an outer surface contacting said inner surface of said enclosing layer. 
   
   
       4 . The multilayer solid golf ball as claimed in  claim 1 , further comprising an intermediate layer, which is provided between said enclosing layer and said core, having an outer surface facing said enclosing layer, wherein said enclosing layer has an inner surface contacting said outer surface of said intermediate layer. 
   
   
       5 . The multilayer solid golf ball as claimed in  claim 4 , wherein said cover has an inner surface, and said enclosing layer has an outer surface contacting said inner surface of said cover. 
   
   
       6 . The multilayer solid golf ball as claimed in  claim 1 , wherein said cover has a thermal conductivity greater than said thermal conductivity of said enclosing layer. 
   
   
       7 . The multilayer solid golf ball as claimed in  claim 4 , wherein said cover has a thermal conductivity greater than said thermal conductivity of said enclosing layer. 
   
   
       8 . The multilayer solid golf ball as claimed in  claim 2 , wherein said intermediate layer has a thermal conductivity greater than said thermal conductivity of said enclosing layer. 
   
   
       9 . The multilayer solid golf ball as claimed in  claim 1 , wherein said thermal conductivity of said enclosing layer is in a range between 0.04 W/m-K and 0.15 W/m-K. 
   
   
       10 . The multilayer solid golf ball as claimed in  claim 1 , wherein said thermal conductivity of said enclosing layer is in a range between 0.06 W/m-K and 0.15 W/m-K. 
   
   
       11 . The multilayer solid golf ball as claimed in  claim 1 , wherein said enclosing layer is made from a material selected from the group consisting of ethylene vinyl acetate, polyurethane, polyester, polyamide, polyisoprene, polyvinyl chloride, acrylonitrile butadiene styrene, polyvinylidene fluoride, polyimide, and a mixture thereof. 
   
   
       12 . The multilayer solid golf ball as claimed in  claim 1 , wherein said enclosing layer has a thickness less than or equal to 1 mm. 
   
   
       13 . The multilayer solid golf ball as claimed in  claim 1 , wherein said enclosing layer has a thickness between 0.005 mm and 0.70 mm. 
   
   
       14 . The multilayer solid golf ball as claimed in  claim 1 , wherein said enclosing layer has a thickness between 0.005 mm and 0.40 mm. 
   
   
       15 . The multilayer solid golf ball as claimed in  claim 1 , wherein said coefficient of restitution of said core is greater than 0.770. 
   
   
       16 . The multilayer solid golf ball as claimed in  claim 1 , wherein said coefficient of restitution of said core is greater than 0.790. 
   
   
       17 . The multilayer solid golf ball as claimed in  claim 1 , wherein said core is made from a thermoplastic material. 
   
   
       18 . The multilayer solid golf ball as claimed in  claim 17 , wherein said thermoplastic material is made from a material selected from the group consisting of ionomer resin, polyamide resin, polyester resin, polyurethane resin, and a mixture thereof. 
   
   
       19 . The multilayer solid golf ball as claimed in  claim 1 , wherein said core has a diameter between 19.0 mm and 37.0 mm. 
   
   
       20 . The multilayer solid golf ball as claimed in  claim 1 , wherein said core has a diameter between 21.0 mm and 35.0 mm. 
   
   
       21 . The multilayer solid golf ball as claimed in  claim 1 , wherein said core has a diameter between 23.0 mm and 32.0 mm.