Pilling is related to the fabric structure, for example, knitting is easier to pilling than weaving, and loose structure is easier to pilling than tight structure. At the same time, pilling is also related to the raw materials of the fabric. The materials with good strength, good fatigue resistance, smooth surface and fine texture are easy to pilling, because the reason for pilling is that the fiber tip slides out of the fabric to form hairiness, and the hairiness entangles with each other to form a ball. Raw material feather with poor strength falls off before entanglement, and raw material feather with less smooth surface is not easy to slip out of the fabric. If we make a ranking of pilling ease, it is probably as follows: nylon>polyester>acrylic>wool>rayon>spun silk>cotton>hemp. Raws li cov qib saum toj no, 95 feem pua cov paj rwb thiab 5 feem pua spandex tsis yooj yim rau pilling. Spandex tsuas yog ua lub luag haujlwm ntawm elasticity, feem ntau nyob rau hauv lub hauv paus ntawm cov xov paj, thiab tsis muaj kev cuam tshuam rau pilling.
