Crimping thermoplastic synthetic yarn - continuously with friction surface

摘要

Running yarn is heated above its softening point, cooled below its 2nd transition point temp., and false twisted by contact with a moving friction surface, which is forcibly cooled to prevent production of heat. Preferably, the yarn is polyamide, polyester, polyacrylonitrile, polyolefin or mixtures of these. Drawn yarn is used, continuously fed from a drawing stage.