Thermoplastic multi-layer golf ball

摘要

A thermoplastic multi-layer golf ball has a core center having a diameter from about 21 mm to about 29 mm and including a first thermoplastic material having a first flexural modulus of less than about 15,000 psi, a core layer disposed radially outward from the core center with a thickness of at least about 4 mm and a second thermoplastic material having a second flexural modulus of up to about 15,000 psi that is greater than the first flexural modulus, and a cover disposed radially outward from the core layer. The cover comprises a third thermoplastic material having a third flexural modulus. The first thermoplastic material and the second thermoplastic material each includes an ionomer resin, and these ionomer resins may be the same as or different from each other.

主权项

1. A golf ball, comprising:
a core center having a diameter from about 21 mm to about 29 mm and comprising a first thermoplastic material having a first flexural modulus of less than about 15,000 psi; a core layer disposed radially outward from the core center, wherein the core layer has a thickness of at least about 4 mm and comprises a second thermoplastic material having a second flexural modulus of up to about 15,000 psi; and a cover disposed radially outward from the core layer, wherein the cover comprises a third thermoplastic material having a third flexural modulus, wherein the second flexural modulus is greater than the first flexural modulus and wherein the first thermoplastic material and the second thermoplastic material each comprises an ionomer resin, which may be the same as or different from each other; and further comprising a second core layer having a thickness of up to about 2 mm disposed between the core layer and the cover, wherein the second core layer comprises a fourth thermoplastic material with a fourth flexural modulus of at least about 40,000 psi and the third flexural modulus is up to about 3,000 psi.