Fabric pilling refers to the fabric surface by a few or several fibers to form fluff, and then entangled in a spherical state. When filaments are produced on the surface of the filament fabric, one or several hooked monofilaments are entangled with each other. These hair ball not only affect the appearance, but also become the reason for the decline in style and other reasons. For the phenomenon of pilling, the loose fabric of the most easy to produce. The study observed, in the course of taking the fabric of the fiber by the external friction, the first pull out the formation of rings and hairs. The condition of the fluff is pulled out of the force is greater than the friction of the fiber in the yarn. So the short fiber fabric with a strong twist yarn or a larger coefficient of friction of the fibers of the greater resistance to raising the hair, it is not easy to fluff. After the hair reaches a certain length, in order to each other gentry into the ball, therefore, the le...