Abstract:

To develop new differential polyester mixed yarn, 167 dtex/96 f full drawn yarn and 350 dtex/96 f medium oriented yarn were used as raw material，the unique cam filament-stricking post processing technique was used to draft medium oriented yarn longitudinally unevenly, and the drawn medium oriented yarn and full drawn yarn were mixed together by network injector, forming bulky and differentially dyeable along its longitudinal direction yarns with fineness of 400 dtex/192 f. The morphology, structure and dyeability of full drawn yarn, medium oriented yarn and mixed polyester yarn were tested. It is shown that the fiber in the mixed fiber yarn was cylindrical, and the fibers are different in linear density. Thickness also changes in the fiber longitudinal direction. the longitudinal orientation of mixed polyester yarn is uneven, and the difference is great. The longitudinal color depth of mixed polyester yarn is uneven, and the difference is great. The longitudinal color depth of mixed polyester yarn is different after dyeing, the color of tight part of the yarn is light while color of fluffy part is deep, and the yarn looked curly and fluffy. The tensile strength of the mixed polyester yarn is higher than that of the medium oriented yarn filament and lower than that of the full drawn yarn filament.

Key words: fuoo drawn yarn, medium oriented yarn, mixed polyester yarn, differential dyeability