Producing method for superfine bi-shrinkable fibre false twist composite yarn

Abstract

A method for preparing the false-twisted composite yarn of superfine dual-contraction fibres from the first and the second raw superfine denier fibres includes such steps as stretching and false twisting or post-treating the first raw fibre to obtain the superfine yarn whose dpf is less than 0.3D and whose contraction rate in boiling water is less than 6%, converging it with the second raw fibre whose contraction rate in boiling water is more than 10%, and air jet twisting. Its fabric features better drapability and fullness, smooth surface and small contraction variation in boiling water (less than 4%).

Description

technical field [0001] The invention belongs to a production process of filaments, in particular to a production method of ultrafine double-shrinkage fiber false-twisted composite yarn. Background technique [0002] For many years, the filaments used in the field of clothing and home furnishing have been supplied to weaving manufacturers in the form of conventional textured yarns by filament manufacturers. After weaving the textured yarns into cloth, the weaving manufacturers go through processes such as dyeing and finishing. , and then supplied to clothing, home decoration fabrics and other manufacturers, who will process the fabrics into finished products, and finally reach the hands of consumers. With the rapid development of our country's national economy and the substantial improvement of people's living standards, people's requirements for home fabrics and apparel fabrics are not only for their wearability and use, but more for their comfort, hand feel and Whether to ...

AI Technical Summary

Problems solved by technology

In order to meet people's requirements for fabric drapability and richness, the method adopted in the prior art is: on the false twisting machine, another high-shrinkage raw yarn is directly drawn from the wire rack, and is placed at the wire guide in front of the second wire feed roller. , through the network nozzle composite method, the processed ultra-fine denier yarn is combined with another high-shrinkage yarn to produce a different-shrinkage composite yarn, which is processed after weaving, dyeing and finishing. After post-processing, there will be a skeleton, drapability and richness. However, after the composite silk is woven into a cloth and dyed and finished, the cloth surface is not smooth enough. Usually, the silk needs to be twisted before weaving. This not only increases the process, but also increases the cost; in addition, from the processing point of view, because the high-shrinkage yarn is directly drawn from the wire frame, the wire path is too long and there is no roller conveying, which is easy to cause the tension of the conveying tension. Unstable, the compounding of the composite yarn is affected, which increases the range of shrinkage. After the post-processing such as weaving dyeing and finishing, the cloth surface is not smooth enough; at the same time, its production speed is also greatly restricted. Unevenness, when the speed exceeds 400M / MIN, the number of broken ends increases significantly, resulting in low efficiency, reduced output, and increased production costs

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