| 摘要 |
A tennis ball comprises a hollow, spherical rubber ball (2) and a felt coating (4) attached thereto by an adhesive (3), the felt coating (4) being cut out from a felted fabric manufactured by knitting a circularly knitted high-pile fabric and laying in blended slivers of wool fibres and nylon fibres to produce a pile 5 needle-punching the circularly knitted fabric so that each pile fibre (5) is anchored at least at two parts thereof to the surface of the ground texture (6), and then forming a felted surface. <IMAGE> |
