A technique for producing a no-twist yarn from a card web has been developed. The fibers in a strip of web are aligned by a special drafting device. The fibers are impregnated with a binder, dried, and packaged. The binder holds the untwisted fibers together until the yarn is made into a fabric. The binder is then removed, and the fibers are held together by the fabric construction. Fabric properties including strength compare favorably with fabric properties of conventional yarns. A yarn production rate of 1 m/s has been achieved.

This paper describes a newly developed, relatively simple but effective technique of producing a novel pseudo-composite cotton-rich staple blend yarn with improved tensile properties. The spacing between cotton and polyester rovings drafted simultaneously on a ring-spinning frame affects yarn structure, resulting in significantly stronger yarns than those produced by drafting the same two rovings together. The new composite or combination yarns may be useful in developing relatively stronger cotton-rich materials suitable for a variety of finishes and end uses.

The DREF-3 spinning method produces a yarn by wrapping a fibrous core with a fibrous sheath at production speeds up to 200 meters per minute. The comparative merits of this high-production spinning method to spin all-cotton yarns are investigated and reported. Two sets of cotton differing mainly in fiber length, strength, and Micronaire reading are used in this experiment. Yarns produced by the DREF-3 machine are compared with yams spun by conventional ring and open-end methods. The influence of fiber properties on yarns spun by the three methods are discussed in terms of yarn strength, elongation, uniformity, and appearance. The

A new filament wrap yarn, the X-wrap, is presented, as well as a procedure and device for producing the new yarn. The theoretical aspect of the X-wrap yarn is also presented. The strength and elongation of the new yarn, which are superior to conventionally wrapped yarn, are discussed and compared.

Progress has continued on the SRRC no-twist yam system since the work was originally announced at the 1979 Natural Fibers Textile Conference. Various me chanical modifications that have allowed the production rate to reach 1.5 m/second (100 yards/minute) are discussed. Yam properties of no-twist yarns made from three different staple length cottons at varying production rates are compared to ring spun and open-end yarns from the same cottons. These results show that the no-twist yams compare favorably in uniformity and grade, but are weaker with lower elongation than the ring or open-end yams. Properties for knitted jersey fabrics from selected no-twist yarns compare favorably with ring and open-end fabrics. Work is continuing on the experimental no-twist yarn system.