FELT FOR TENNIS BALL, AND TENNIS BALL

摘要

PROBLEM TO BE SOLVED: To provide felt for a tennis ball to be hardly creased in molding a tennis ball. SOLUTION: The felt 12 is used to cover a core 10 of the tennis ball. The felt is formed of a nonwoven fabric, and the bending resistance measured by a cantilever method is not more than 15 cm. COPYRIGHT: (C)2011,JPO&INPIT