In addition to being caused by improper wearing or rubbing with hard objects, some of the looser fibers may fall off or entangled after wearing the clothes several times to form a pilling, which is completely normal. Even the best quality cashmere sweaters will have a slight pilling in the appropriate range at the beginning.
Due to the particularity of the fiber itself, the reasons for the cashmere product pilling are as follows:
(1) Length of the fiber: The fabric woven from the longer fiber is lighter than the woven fabric of the shorter fiber; since the number of fiber ends per unit length is small, the fiber ends of the exposed yarn and the fabric surface are also less. Cashmere fibers are 35 to 45 mm in length and wool fibers are 70 to 140 mm in length.
(2) Fineness of the fiber: The coarse fiber is less likely to pilling than the fine fiber. The yarn spun from the coarse fiber has a small number of fibers per unit area, and the fiber ends on the surface of the exposed yarn and the fabric are less; in addition, the thicker the fiber, the stiffer the fiber which is erected on the surface of the fabric is not easily entangled into a ball. Cashmere fineness is significantly smaller than wool.
(3) Curl degree of the fiber: the fiber has more curl, the cohesion between the fibers is large, the friction increases, and the fiber is not easily released to the surface of the fabric, so that it is not easy to pilling. Cashmere curls are less than wool.