Effects of spinning conditions on structure and properties of open-end cover-spun yarns

Critical settings and their effects on the properties of open-end cover spu n yarns produced by a novel system are explained. The yarns are constructed from open-end rotor spun (OER) yarns and textured polyester yarns combined within the yarn formation zone of the rotor during the open-end rotor spin ning process. The end result is a textured yarn wrapped as a sheath around an OER yarn core, in which the wraps per meter distribution is uniform, the yarn remains soft, and tensile properties are better than for an equivalen t OER yarn.