| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem in manufacture due to moisture absorptive of ionomer resin neutralized to a high level, which is used for a cover of a golf ball, and to improve deterioration of performance as a ball. <P>SOLUTION: A multilayer golf ball 10 includes a core 12, an optional intermediate layer 14 and a cover 16, wherein at least one layer includes, a first highly neutralized moisture resistant acid polymer composition having a moisture vapor transmission rate of 8 g-mil/100 in<SP>2</SP>/day or less, the intermediate layer includes a second highly neutralized acid polymer, and the two polymer layers form a percent neutralization gradient. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
