In this study, observing that the black polyester fibers migrated in the machine direction and cross directin of the cotton nonwoven fabric. Then researching the change in the times of needle punching and the depth of needle punching. The experimental results indicate that there are more than one hundred fifty black polyester fibers in the cross direction between 80° ~ 100° (50%). The length of projection in X axle: 1.2cm, and the length of projection in Y axle: 3.8cm. And there are more than one hundred fifty black polyester fibers in the machine direction between 70° ~120° (50%). The length of projection in X axle: 3.7cm, and the length of projection in Y axle: 1.7cm.
