Golf Ball Having Temperature Controllable Compression Deformation

Abstract

A golf ball having a cover layer, an outer core layer, and an inner core layer. The inner core layer has a first compression deformation at 24° C. and a second compression deformation at 70° C. The ratio between the second compression deformation and the first compression deformation is between approximately 1.5 and approximately 2.5.

What is claimed is: 
     
         1 . A golf ball, comprising:
 a cover layer;   an outer core layer disposed radially inward of the cover layer; and   an inner core layer disposed radially inward of the outer core layer, the inner core layer having a first compression deformation at 24° C. and a second compression deformation at 70° C., wherein a first ratio between the second compression deformation and the first compression deformation is between approximately 1.5 and approximately 2.5.   
     
     
         2 . The golf ball according to  claim 1 , wherein after heating to 70° C. and cooling at 24° C. for 90 minutes, the inner core layer has a third compression deformation, wherein a second ratio between the third compression deformation and the first compression deformation is between approximately 1.08 and approximately 1.35. 
     
     
         3 . The golf ball according to  claim 2 , wherein after heating to 70° C. and cooling at 24° C. for 150 minutes, the inner core layer has a fourth compression deformation, wherein a third ratio between the fourth compression deformation and the first compression deformation is between approximately 1.08 and approximately 1.35. 
     
     
         4 . The golf ball according to  claim 3 , wherein after heating to 70° C. and cooling at 24° C. for 210 minutes, the inner core layer has a fifth compression deformation, wherein a fourth ratio between the fifth compression deformation and the first compression deformation is between approximately 1.08 and approximately 1.35. 
     
     
         5 . The golf ball according to  claim 1 , wherein the first compression deformation is between about 3 mm and about 5 mm. 
     
     
         6 . The golf ball according to  claim 1 , wherein the second compression deformation is between about 6 mm and about 8 mm. 
     
     
         7 . The golf ball according to  claim 2 , wherein the first compression deformation is between about 3 mm and about 5 mm. 
     
     
         8 . The golf ball according to  claim 2 , wherein the second compression deformation is between about 6 mm and about 8 mm. 
     
     
         9 . The golf ball according to  claim 2 , wherein the third compression deformation is between about 3.5 mm and 5.5 mm. 
     
     
         10 . The golf ball according to  claim 8 , wherein the third compression deformation is between about 3.5 mm and 5.5 mm. 
     
     
         11 . The golf ball according to  claim 1 , wherein the inner core layer is formed of a thermoplastic. 
     
     
         12 . The golf ball according to  claim 11 , wherein the thermoplastic is a highly neutralized acid polymer. 
     
     
         13 . The golf ball according to  claim 6 , wherein the second ratio is between approximately 1.13 and approximately 1.33. 
     
     
         14 . The golf ball according to  claim 9 , wherein the third ratio is between approximately 1.11 and approximately 1.26. 
     
     
         15 . The golf ball according to  claim 4 , wherein the fourth ratio is between approximately 1.09 and approximately 1.19. 
     
     
         16 . The golf ball according to  claim 5 , wherein the inner core layer has a diameter of approximately 24 mm. 
     
     
         17 . The golf ball according to  claim 5 , wherein the ratio is approximately 1.09 and the inner core layer has a diameter of approximately 28 mm.