CONCLUSION:

The yarn structure resulting from compact spinning technology appears to get very close to a maximum utilization of each fiber in the yarn bundle. This makes it possible to achieve higher yarn strength from any fibers used. However, the improvements in yarn strength appear to be greater for shorter stapled cottons than for the longer staple lengths. These results made it clear that some fibers that were inadequate for use in conventional ring spinning may be spun satisfactorily on the compact system.

As expected, compact spinning greatly reduced the hairiness of yarns. As with the tensile properties, the greatest reductions in hairiness occurred with the shorter stapled fibers.

Compact spinning did not result in significant improvements in any of the yarn evenness parameters tested with the UT3. Furthermore, this conclusion held for all staple length categories.

Taken together, these results suggest that compact spinning technology may enable us to extend the use of shorter stapled cottons into the manufacture of finer yarns than has heretofore been feasible. It exemplifies a technological innovation that, instead of making greater demands on fiber properties, actually compensates for the lack of certain fiber properties.

Finally, these results reveal that some of Texas cottons are among the best upland cotton fibers produced in the U.S. Thus, on average the Texas cottons performed as well as or better than the high-quality Delta cottons on both the conventional and compact ring spinning systems. And a subset of the Texas cottons performed as well as or better than the high-quality California cottons.

LITERATURE CITED:

Artzt P., 2000. The special structure of compact yarns - Advantages in downstream processing. Beltwide Cotton Conferences, January 4-8, San Antonio, TX (USA), National Cotton Council of America. Memphis, TN (USA), pp. 798-803.

Hequet E., Ethridge D., and Cole W. D., 1998. Evaluation of improvement in yarn quality with new ring spinning frame. Textile Topics (4: fall 1998): 2-8.

Meyer U., 2000. Compact yarns: innovation as a sector driving force. Melliand International, 6 (1): 2.

Olbrich A., 2000. The AIR-COM-TEX 700 condenser ring spinning machine. Melliand International, 6 (1): 25-29.

Seuberling J., 1995. Advanced standard in ring spinning. Melliand International (1): 25-26.

Stahlecker H., 1995. Fiomax: High speed spinning machine. Melliand International (1): 27-28.

Stalder H., 2000. New spinning process ComforSpin. Melliand International, 6 (1): 22-25.

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