In addition to pilling caused by improper wearing or friction with hard objects, it is completely normal for some loose fibers to fall off or tangle together to form pilling after the clothes are worn several times. Even the best quality cashmere sweaters will have a moderate degree of mild pilling when they are first worn.
1. Due to the particularity of the fiber itself, the reasons for the pilling of cashmere products are as follows:
(1) Fiber length: Fabrics woven with longer fibers have a lower pilling degree than fabrics woven with shorter fibers; due to the small number of fiber segments per unit length, fewer fiber ends are exposed on the surface of the yarn and fabric. The length of cashmere fibers is 35-45mm, while the length of wool fibers is 70-140mm.
(2) Fiber fineness: Coarse fibers are less prone to pilling than fine fibers. Yarns spun from coarse fibers have fewer fibers per unit area, and fewer fiber ends exposed on the surface of the yarn and fabric. In addition, the coarser and harder the fibers are, the less likely they are to tangle into balls when standing on the surface of the fabric. Cashmere is significantly finer than wool. (3) Fiber curl: The more curl a fiber has, the greater the cohesion between the fibers, the greater the friction, and the less likely the fibers are to dissociate from the fabric surface, causing pilling. Cashmere has less curl than wool.