Differential shrinkage composite fiber and processing method thereof

Abstract

The invention relates to a differential shrinkage composite fiber and a processing method thereof. The processing method includes the sequential steps of subjecting to raw materials, namely pure terephthalic acid and glycol, to esterification to obtain polyester melt, delivering the melt, simultaneously spinning pre-oriented yarns and full-drawn yarns, oiling, pre-interlacing the full-drawn yarns, drafting the full-drawn yarns, interlacing and complexing, and winding to produce the differential shrinkage composite fiber of 47dtex / 48f. Existing equipment is fully modified, spinning and winding are integrated, 20 fixed-length constant-weight spinning cakes can be produced at each station, production efficiency is high, yield is increased, product quality is stable, the produced fiber has differential shrinkage, post-processing gigging is effective, the differential shrinkage composite fiber feels nice, is thick and is widely applicable to production of chiffon and printed fabrics.

Description

technical field [0001] The invention relates to a processing method for producing composite fibers on melt direct spinning, in particular, two different fiber raw materials can be spun, combined and wound in one step, and spinning and winding can be produced simultaneously. The processing method of different shrinkage composite fibers of 20 fixed-length and fixed-weight silk cakes. Background technique [0002] Due to production technology reasons, domestic manufacturers generally adopt a two-step method to produce different shrinkage composite fibers. The number of spinning and winding heads of this production method is mostly 6 heads, 12 heads, and at most 20 heads, which is an ordinary conventional spinning method. Silk and winding technology, through the separate spinning of pre-oriented yarn (POY) and fully drawn yarn (FDY), winding and then unwinding and net processing to produce different shrinkage composite fibers, the two-step production has the following disadvanta...

AI Technical Summary

Problems solved by technology

[0003] 1. Low production efficiency: the compounding speed of the two-step method is about 800m / min;

[0004] 2. High production cost: The two-step method is that two kinds of fibers are spun separately, wound and then composited through the subsequent process. The production process increases, the equipment investment increases, the floor area is large, the labor cost is high, and the raw material consumption is large. In the production cycle field, the occupation of working capital increases, and the rate of high-quality products is low;

[0005] 3. Unstable quality: the two-step production process is long, with many control points and many influencing factors, making it difficult to control;

However, the different shrinkage composite fibers produced by the one-step method of the above-mentioned chip spinning technology, compared with the different shrinkage composite fibers produced by the one-step method of the melt direct spinning technology, need pelletizing, packaging, drying and other procedures, which increase production costs and make quality control difficult.

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