A SPINNING CONCEPT FOR PRODUCING WOOLEN CARPET YARNS DIRECTLY FROM CARD SLIVER .2. COMPARISON OF DISC-RING AND WOOLEN RING SPUN YARN STRUCTURE AND PROPERTIES

The structure and properties of disc-ring yarns made from five commerc ial 80/20 wool/nylon blends are compared with conventional woolen ring spun yarns of the same blends and equivalent yarn counts. Blends with the highest percentage of coarse wool fibers produce disc-ring yarns with tensile properties similar to the woolen ring spun yarns, but the former have better evenness properties. Tracer fiber studies reveal t hat the structure of disc-ring yarns consists of a disordered arrangem ent of the constituent fibers. Analysis of the yarn cross section show s that with the disc-ring yarn, fiber packing density increases from t he center to the outer zone of the yam. The woolen ring-spun yarn show s the converse tendency. In general, disc-ring yarns are more bulky th an woolen ring spun yarns.