Poly(ethylene terephthalate) (PET) slit film yarn, which was crystalline and par tially oriented, was first given a 100% stretch at temperatures between 90 and 180°C. These drawn yarns were then textured on a spindle false twist texturing machine under standard conditions, and the textured samples were heat-set in hot water. The post-textured heat-set yarn samples showed good crimp retraction characteristics. The characteristics of the feeder yarn, which govern the properties of the textured yarn, are highlighted. The yarn drawn at 130°C has the lowest crystallinity and, when textured, gives optimum properties.
Get full access to this article
View all access options for this article.
References
1.
Charch, W.H. , and Mosdy. W.W. Jr.. Structure-Property Relationships in Synthetic Fibers, Textile Res. J.29, 525-535 (1959).
2.
Daubeny, R. de P., Bunn, C.W., and Brown. C.J., The Crystal Structure of Polyethylene Terephthalate . Proc. R. Soc. London. Ser. A, 226, 531-542 ( 1954).
3.
Farrow, G. and Preston. D., Measurement of Crystallinity in Drawn Polyethylene Terephthalate Fibres by X-Ray Diffraction. Br. J. Appl. Phys.11, 353-358 (1960).
4.
Fitton, S., and Stacey. P.Apparatus for the Measurement of the Crimp Rigidity of Bulked and Stretch Yarns, J. Textile Inst.51, T435-T437 ( 1960).
5.
Gupta. V.B., Gupta. D.P., and Mittal. S.C.The Mechanical Properties of Texture Polyethylene Terephthalate Yarn, Textilo Res. J.48, 446-453 (1978).
6.
Gupta, V.B., and Kumar. M.Changes in the Structure of Polyethylene Terephthalate Yarn on Texturing. Textile Res. J.45, 382-388 (1975).
7.
Gupta, V.B., and Natarajan. M.Latent Crimp in False-Twist-Textured Polyethylene Terephthalate Yam. Textile Res. J.46, 417-419 (1976).
8.
Moseley. W. W., Jr.. The Measurement of Molecular Orientation in Fibers by Acoustic Methods. J. Appl Polym. Sci.3, 266-276 (1960).
9.
Smith, R.L., Pieters, R. and Morrison. M.E., Fundamentals of False-Twist Texturing of Thermoplastic Continuous Filament Yarns, Trans Soc. Rheol.16, 557-576 (1972).
10.
Spruiell, J.E. , McCord, D. E., and Beuerlein, R. A.. The Effect of Strain History on the Crystallization Behavior of Bulk Poly(ethylene Terephthalate) . Trans. Soc. Rheol.16, 535-555 (1972).
