The invention relates to a method for improving performances of yarns formed by vortex
spinning by reducing the modulus and the rigidity of fibers on line and belongs to the field of
textile processing. According to the method disclosed by the invention, a sectional
softening treatment method is applied for carrying out progressive
softening treatment on fibers subjected to vortex
spinning on a vortex
spinning machine, and thus the
fiber modulus and the bending rigidity are quickly reduced on line and the performances of the
resultant yarns prepared from fibers by vortex are improved. For a vortex
yarn structure, the structure compactness is improved, the
yarn strength is enhanced and residual torque of the yarns is small; in addition, the non-spinning fibers can be subjected to vortex spinning on the vortex spinning
machine; the fibers with poorer quality for the
resultant yarns formed by the vortex spinning are subjected to high-quality spinning on the vortex spinning
machine; and particularly, the improvement on the spun count of the fibers on the vortex spinning machine is facilitated and the smooth production of high grade cotton yarns formed by vortex spinning is realized. The method disclosed by the invention has the advantages of short work procedure flow, strong pertinence, high efficiency, lower cost, reasonable structure, convenience in operation and easiness in large-area popularization and use.