| 主权项 |
1. A golf ball consisting essentially of:
a multi-layer core having a diameter ranging from 1.50 inches to 1.60 inches, the multi-layer core having a deflection of at least 0.230 inch under a load of 220 pound, the core having a COR of at least 0.780; a mantle layer disposed over the multi-layer core, the mantle layer composed of a blend of ionomers, the mantle layer having a thickness ranging from 0.025 inch to 0.040 inch; and a cover disposed over the mantle layer, the cover composed of a thermoplastic polyurethane material having a Shore A hardness ranging from 70 to 95, the cover having a thickness ranging from 0.025 inch to 0.040 inch; wherein the cover has a specific gravity greater than the core; wherein the golf ball has a PGA compression no greater than 75; wherein the golf ball has an Aggregate Impact Ratio (AIR) greater than 1.65, wherein
AIR=(CT150/CT75)×(CA150/CA75) wherein CT150 is a golf ball contact time at an impact speed of 150 feet per second, CT75 is a golf ball contact time at an impact speed of 75 feet per second, CA150 is a golf ball contact area at an impact speed of 150 feet per second, and CA75 is a golf ball contact area at an impact speed of 75 feet per second. |
