We have studied the elastic recovery and inverse relaxation phenomena of polyester staple fiber rotor spun yarns. Better fiber orientation obtained with a drawing passage before spinning results in higher permanent deformation and lower delayed elastic recovery of the yarn. Yarn twist has little influence on elastic characteristics. The stress produced in the yarn when strained at 10% is higher when fibers are straighter and lower when twist increases. The inverse relaxation effect increases with the level of orientation of the fibers in the yarn.
Get full access to this article
View all access options for this article.
References
1.
ASTM Standard, DI 774–79, part 33, p. 397.
2.
KrauszA. S.EyringH., “Deformation Kinetics,”J. Wiley & Sons, New York, 1975.
3.
ManichA. M.de CastellarM. D.BarellaA., Influence of a Yarn Extractive Nozzle on the Apparent Loss of Twist in Rotor Open-End Acrylic Staple Spun Yarns, Textile Res. J.56 (3), 207–211 (1986).
4.
MeredithR., “The Mechanical Properties of Textile Fibres,”Interscience Publishers, Inc., New York, 1956.
5.
MortonW. E.HearleJ. W. S., “Physical Properties of Textile Fibres,”The Textile Institute, Manchester, 1986.
6.
NachaneR. P.HussainG. F. S.IyerK. R. Krishna, Inverse Relaxation/Stress Recovery in Cotton Fibers and Yarn, Textile Res. J.7, 483–484 (1982).
7.
NachaneR. P.HussainG. F. S.PatelG. S.Krishna IyerK. R., Inverse Relaxation in Spun Yarns, J. Appl. Polym. Sci.31, 1101–1110 (1986).
