FELT FOR TENNIS BALL, AND TENNIS BALL

摘要

PROBLEM TO BE SOLVED: To provide a felt for a tennis ball by which wrinkles are hard to be generated at the time of molding of the tennis ball. SOLUTION: For this felt 12 which is coated on the core 10 of a tennis ball, a fiber which forms the felt is treated by a softening agent for fibers. COPYRIGHT: (C)2011,JPO&INPIT