Multi-piece golf ball

Abstract

A multiple-piece golf ball includes a solid core having a specific gravity from about 1.2 to about 14; and a cover disposed on the outside of the solid core, wherein a spin decay rate of the golf ball during flight is from about 3.1% to about 20% of an initial spin rate of the golf ball from about 2800 to about 3500 rpm; and wherein a moment of inertia of the golf ball with respect to an x-axis Ix, a moment of inertia of the golf ball with respect to a y-axis Iy, and a moment of inertia of the golf ball with respect to a z-axis Iz are substantially the same, the x-axis, y-axis, and z-axis intersecting orthogonally at the center of the golf ball.

1 . A multiple-piece golf ball comprising:
 a solid core having a specific gravity from about 1.2 to about 14; and   a cover disposed on the outside of the solid core,   wherein a spin decay rate of the golf ball during flight is from about 3.1% to about 20% of an initial spin rate of the golf ball from about 2800 to about 3500 rpm; and   wherein a moment of inertia of the golf ball with respect to an x-axis Ix, a moment of inertia of the golf ball with respect to a y-axis Iy, and a moment of inertia of the golf ball with respect to a z-axis Iz are substantially the same, the x-axis, y-axis, and z-axis intersecting orthogonally at the center of the golf ball.   
     
     
         2 . The golf ball according to  claim 1 , wherein the solid core comprises at least one specific gravity-enhancing member. 
     
     
         3 . The golf ball according to  claim 2 , wherein the solid core comprises one specific gravity-enhancing member. 
     
     
         4 . The golf ball according to  claim 2 , wherein the solid core comprises plural specific gravity-enhancing members. 
     
     
         5 . The golf ball according to  claim 3 , wherein the specific gravity-enhancing member has a transmission loss of at least about 10 dB in the region from 1000 to 4000 Hz. 
     
     
         6 . The golf ball according to  claim 4 , wherein the specific gravity-enhancing member has a transmission loss of at least about 10 dB in the region from 1000 to 4000 Hz.