In daily life, people have a prejudice. They think that woolen sweaters are a quality problem as long as they are pilling. In fact, woolen sweaters, cashmere sweaters and other wool blended products all have pilling. The International Wool Bureau has tried a series of complicated and difficult technical solutions to solve the problem of woolen pilling, but still has not found a complete solution to the problem. A foreign expert once said that "no ball, no wool."
The pilling is formed by the frictional movement of short fibers on the surface of the fabric, which is caused by external friction. When the fabric parts are rubbed against each other or rubbed by any fabric that is rougher than itself during the wearing process, fluffing occurs and the pellets are formed. Therefore, the most intense part of the surface of the sweater is the most pilling. Typically, a wool ball weighs only 0.15-0.20 mg, which gives the fabric an undesirable appearance but does not have much effect on the wear life of the fabric. In fact, the sweater is like a sole, and there is friction in the movement. The degree of damage is directly proportional to the degree of wearing. The pilling of the sweater is the same as the wear of the sole, the wear resistance is relative, and the loss is absolute and affirmative. The same carding pilling is affirmative, and the degree of pilling is related to the degree of personal wear. Therefore, consumers should minimize the friction with rough objects during the wearing process, which will definitely reduce the pilling situation. In general, fine needle products, fine yarn products, and tightness products are less prone to pilling; while thick needle products, roving products, and loose structure soft products are relatively easy to pilling.