Golf ball with velocity reduced layer
Disclosed herein is a golf ball comprising a core, a cover and a velocity-reduced layer disposed therebetween, wherein the velocity-reduced layer reduces the coefficient of restitution of the ball by at least 0.005, and wherein the velocity-reduced layer has a loss tangent in the range of 0.01 to 100 at frequency less than 100 Hz.
1 . A golf ball comprising a core, a cover and a velocity-reduced layer disposed therebetween, wherein the velocity-reduced layer reduces the coefficient of restitution of the ball by at least 0.005, and wherein the velocity-reduced layer has a loss tangent in the range of 0.01 to 100 at frequency of about 100 Hz.
2 . The golf ball of claim 1 , wherein the velocity-reduced layer comprises a polyurethane or polyurea having a material hardness of less than 40 Shore A.
3 . The golf ball of claim 1 , wherein the velocity-reduced layer comprises a polyurethane or polyurea having a material hardness less than about 20 Shore A.
4 . The golf ball of claim 1 , wherein the loss tangent is in the range of 0.05 to 50.
5 . The golf ball of claim 4 , wherein the loss tangent is in the range of 0.1 to 10.
6 . The golf ball of claim 1 , wherein the velocity-reduced layer has a material coefficient of restitution of 0.3 to 0.7.
7 . The golf ball of claim 6 , wherein the material coefficient of restitution is in the range of 0.4 to 0.65.
8 . The golf ball of claim 7 , wherein the material coefficient of restitution is in the range of 0.45 to 0.6.
9 . The golf ball of claim 1 , wherein the velocity-reduced layer comprises plasticized polyurethane.
10 . The golf ball of claim 9 , wherein the plasticized polyurethane is foamable.
11 . The golf ball of claim 1 , wherein the velocity-reduced layer comprises latex.
12 . The golf ball of claim 11 , wherein the latex has a flexural modulus of less that 10,000 psi.
13 . The golf ball of claim 12 , wherein the latex has a flexural modulus of less than 3,000 psi.
14 . The golf ball of claim 11 , wherein the latex has a material hardness of less than 90 Shore A.
15 . A golf ball comprising a core, a cover and a velocity-reduced layer disposed therebetween, wherein the velocity-reduced layer reduces the coefficient of restitution of the ball by at least 0.005, and wherein the velocity-reduced layer comprises a rubbery elastomeric material having a hardness from 10 Shore A to 50 Shore D wherein the loss tangent at 23° C. and a frequency of about 100 Hz is less than 100.
16 . The golf ball of claim 15 wherein the loss tangent is less than 10.
17 . The golf ball of claim 15 , wherein the loss tangent is less than 5.
18 . A golf ball comprising a core, a cover and a velocity-reduced layer disposed therebetween, wherein the velocity-reduced layer reduces the coefficient of restitution of the ball by at least 0.005, and wherein the velocity-reduced layer comprises a thermoplastic rigid materials having a hardness from 30 to 80 Shore D, wherein the loss tangent at 23° C. and a frequency of about 100 Hz is less than 100.
19 . The golf ball of claim 18 , wherein the loss tangent is less than 10.
20 . The golf ball of claim 18 , wherein the loss tangent is less than 5.