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Abstract

Poly(ethylene terephthalate) (PET) structure and morphology were modified and set during a continuous false twist solvent texturing process. Three yam types were included in this study: partially oriented yam (POY), high speed spun yarn (HSSY), and an experimentally extruded yarn known as quenched high speed spun yarn (QHSSY). A prototype continuous false twist solvent texturing machine was used to produce textured samples (thermally as well as with solvents). Excessive extensibility of POY was virtually eliminated by drawing on the machine, in the same zone as the solvent treatment, but this action reduced solvent diffusion into the filaments. HSSY crystallinity increased slightly, about 8% during solvent texturing, the main reason being a large amount of initial crystallinity for the feed yam. QHSSY was most suitable for solvent texturing, since it initially contains a large amount of oriented noncrystalline material that is crystallized during texturing. Textured QHSSY set by solvent plus heat, in comparison with heat only, increased significantly in percent crystallinity and crys tallite dimensions.

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References

Gupta, V.B. , and Amirtharaj, J. , The Effect of Tension and Twist on the Structure and Dyeability of Textured Polyethylene Terephthalate Yam, Textile Res. J. 46, 785-790 (1976).

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United States Patent no. 4,425,293, Preparation of Amorphous Ultra-High-Speed-Spun Polyethylene Terephthalate Yarn for Texturing, George Vassilatos, E.I. DuPont de Nemours and Company, Wilmington, DE, Jan. 10, 1984.

Solvent Texturing of Polyester Yarn

Abstract

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References