Cotton fibers receive more opening and blending than man-made fibers, since they have more impurities and greater variation than do man-made fibers.

• 与人造纤维比较,棉纤维需要更充分的开松和清洁,这是因为棉纤维比人造纤维含杂量要大,而且纤维品质的波动较大。