Abstract
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 inves tigated 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 effect of exhaust air pressure on yarns spun by the DREF-3 is also discussed.
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