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New elastic fiber and preparation method thereof

A fiber and composite fiber technology, applied in the field of polymer elastic fiber and its preparation, can solve the problems of poor shrinkage stability over time, limited applications, insufficient thermal shrinkage, etc.

Inactive Publication Date: 2009-02-04
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the side-by-side composite fiber of PET / PTT combination, in the spinning-stretching-setting process, although the PET component used in it can obtain potential high shrinkage performance, the thermal shrinkage rate is not enough, and the shrinkage rate is experienced. Poor time stability
Therefore, the elastic elongation, elastic recovery and stability of the side-by-side composite fiber composed of PET / PTT need to be improved; in addition, the side-by-side composite fiber usually needs 130°C high temperature and high pressure dyeing, which limits its use in wool, Application in cashmere and silk fabrics

Method used

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  • New elastic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Preparation of copolyester (HSPET) for high shrinkage fibers

[0039] Calculated by mass ratio, take 1 part of terephthalic acid (PTA), 0.042 part of isophthalic acid (IPA), 0.010 part of neopentyl glycol (DTG), 476 parts of ethylene glycol (EG) and 0.00032 part of polycondensation catalyst Sb 2 O 3 and 0.0003 parts of stabilizer H 3 PO 3 , stirred in a beating kettle to make a slurry. The above-mentioned slurry is gradually and continuously sent into the esterification reaction kettle to carry out semi-continuous direct esterification reaction in 2.5~3.0hr, and some pre-prepared ethylene terephthalate (containing IPA, DTG, etc.) has been prepared in the reaction kettle. ) melt to ensure that the esterification reaction can be carried out under normal pressure. The esterification reaction temperature is 255°C, and the reaction time is 175min. When the esterification reaction rate reaches more than 98%, the reaction product can be moved into the polyconden...

Embodiment 2

[0044] Example 2: Study of shrinkage properties of high shrinkage copolyester (HSPET).

[0045] The HSPET chips obtained in Example 1 were pre-crystallized with 150° C. dehumidifying hot air, with a large air volume for 20 minutes, and then dried with 140° C. dehumidifying hot air for 5 hours, and the moisture content was less than 40ppm and then sent to the screw extruder. The spinning melt temperature was 285°C; the spinning-drawing-setting process was completed by one-step spinning-drawing process (FDY); the temperature of the first hot roller (DR1) was 80°C and the speed was 1650m / min; the second hot roller (DR2) ) temperature 90 ℃, speed 4700m / min; winding speed 4600m / min. The obtained fiber had a linear density of 30 dtex, a breaking strength of 4.20 cN / dtex, an elongation at break of 26%, a boiling water shrinkage rate of 66%, and a dry heat shrinkage rate of 53% at 180°C.

Embodiment 3

[0046] Example 3: Preparation of Side-by-Side Composite Fibers

[0047] The high shrinkage copolyester (HSPET) prepared in the above Example 1 and polytrimethylene terephthalate (PTT) with an intrinsic viscosity of 0.91 dl / g were used as raw materials, and the volume ratio of HSPET / PTT was 50 / 50. The two kinds of chips were dried first, and then the side-by-side composite fibers were spun. The spinning machine is a compound twin-screw extruder, the screw diameter is 30mm, the length-diameter ratio is 25:1, the main and auxiliary double-box structure, the spinning spinneret is 24 holes, and the spinneret hole diameter is 0.25mm. The spinning box temperature was 276°C, and the spinning speed was 800m / min. The nascent fiber is drawn and set on a flat drawing machine, the stretching temperature is 90°C, the stretching ratio is 3.8 times, and the setting temperature is 150°C. The linear density of the finished fiber is 171dtex / 48f, the breaking strength is 1.86cN / dtex, and the br...

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Abstract

The invention provides a high elasticity fiber, which is a bicomponent composite fibre. One component of the bicomponent composite fiber is synthetic high contractility copolyester HSPET, which is prepared with terephthalic acid, m-phthalic acid, glycol and neopentyl glycol through esterification and polycondensation reaction; and the other component of the bicomponent composite fiber is polytrimethylene terephthalate. After the bilateral composite fiber is heated, a helical tridimensional curled structure is got so that the fiber has excellent elastic elongation and elastic recovery. The bicomponent composite fiber is a novel functional fibrous material applicable for weaving elastic textiles.

Description

technical field [0001] The invention relates to a polymer elastic fiber and a preparation method thereof. Specifically, an elastic fiber with a three-dimensional three-dimensional crimp structure and a preparation method thereof are provided. Background technique [0002] There is a lot of research work on polymer elastic fibers, but few can actually be industrialized and applied. The most famous one should belong to the "Lycra" of DuPont Company in the United States. In 1937, Professor Otto Bayer discovered the polyaddition reaction of diisocyanates and prepared polyurethane elastic fibers with the trade name "Perlon". Since then, Du Pont Company and ICI Company have also discovered the elastic properties of polyurethane, but their melt stability is poor, and it is difficult to make them fiberized by a simple melt spinning method. In 1958, Du Pont officially launched the applicable elastic fiber under the trade name of "Fiber K" and "Lycra" in the following year. ) synth...

Claims

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Application Information

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IPC IPC(8): C08G63/181D01F8/14D06P3/54
Inventor 张大省王锐陈玉顺王春梅甘丽车俊豪
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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