There are many factors that cause sweater pilling:
1. Raw material factors: The higher the quality of the wool raw material, the better the fineness, the denser the surface scales, the better the curl, and the soft hand, but it is easy to entangle and pilling.
2. Different fabric structures (flat needles, ingots, double ingots, etc.) and different densities (loose, tight) will also produce different degrees of pilling. The State Technical Supervision Bureau tests the pilling according to different yarn specifications (counts). ) Weave into the specified specification density, the sample of the structure is placed in the pilling box within the specified time for testing, and then the grade is assessed.
3. Contact with different objects (smooth, rough) during wearing will also produce different degrees of pilling. Sleeves, pockets and other parts are often rubbed and easy to pilling.
4. From the technical point of view: If the twist is loose, the woolen yarn will be rounder and the yarn will be plump, but it will be easier to pilling. If the twist is too tight, it will lose the style of the woolen yarn, like a rope. Therefore, during the initial wearing of the sweater, the pilling phenomenon is slightly more obvious, and it can be repaired with small scissors, it will not occur again, and this phenomenon will gradually disappear.