| 摘要 |
PURPOSE: To improve elasticity and flexibility of a tennis ball, and, simultaneously, reduce a fall out of pile fiber from the ball and obtain a long life of the ball by applying a circular-knitted high pile fabric, being provided a needle punching treatment and a milling treatment, as a facing. CONSTITUTION: A facing 4 is laminated and fixed via an adhesive layer 2 onto the surface of a spherical rubber core 2 with a hollow part 1. The facing 4 is made of a material that a circular-knitted high pile fabric exposed as pile fiber from one surface of the base texture. Slivers are laid by brushing the piled ground fabric formed from wool and nylon mix-spinned yarn. Under such a condition, the ground fabric is needle-punched from the pile side surface to bury one pile 5 at least at two points in the base texture 6 and protruded outside to be anchored at points 5b and 5d. After that, the high pile fabric is treated by wool type milling and stuffing to obtain a felt fabric to be the surface. A tennis ball is produced by using this circular-knitted pile fabric felt. |
