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Low-color-difference polyester wool-like different-shrinkage complex yarn and preparation method thereof

A composite yarn and differential shrinkage technology, which is applied in the direction of single-component polyester rayon, rayon manufacturing, melt spinning, etc., can solve the problems of increased air content in PET differential shrinkage blended composite yarn fabrics.

Active Publication Date: 2016-06-08
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increased air content in PET different shrinkage blended composite silk fabrics

Method used

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  • Low-color-difference polyester wool-like different-shrinkage complex yarn and preparation method thereof
  • Low-color-difference polyester wool-like different-shrinkage complex yarn and preparation method thereof
  • Low-color-difference polyester wool-like different-shrinkage complex yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] A method for preparing low-color-difference polyester wool-like differential shrinkage composite yarn, the main process includes:

[0085] (1) Preparation of catalyst magnesium ethylene glycol:

[0086] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 6V, the cathode current density is 150mA, and electrolyze for 10 hours at 50°C. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;

[0087] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0088] Esterification reaction:

[0089] Use terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.2:1, add anti-ether agent sod...

Embodiment 2

[0123] A preparation method of low chromatic aberration polyester wool-like composite yarn with different shrinkage, the main process includes:

[0124] (1) preparation of catalyst ethylene glycol magnesium:

[0125] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; direct current is applied, the initial voltage is 10V, the cathode current density is 200mA, and the electrolysis is performed at 60 °C for 12 hours. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain ethylene glycol magnesium;

[0126] (2) Preparation of polyester, including esterification and polycondensation:

[0127] Esterification:

[0128] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol and terephthalic acid is 2.0:1, adding ether preve...

Embodiment 3

[0162] A preparation method of low chromatic aberration polyester wool-like composite yarn with different shrinkage, the main process includes:

[0163] (1) preparation of catalyst ethylene glycol magnesium:

[0164] Add ethylene glycol into a single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; direct current is applied, the initial voltage is 7V, the cathode current density is 160mA, and the electrolysis is performed at 55 °C for 11 hours. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain ethylene glycol magnesium;

[0165] (2) Preparation of polyester, including esterification and polycondensation:

[0166] Esterification:

[0167] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol and terephthalic acid is 1.5:1, adding anti-ether age...

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Abstract

The invention relates to low-color-difference polyester wool-like different-shrinkage complex yarn and a preparation method thereof. The low-color-difference polyester wool-like different-shrinkage complex yarn is prepared through carrying out fiber intermingling on low-color-difference polyester POY (Pre-Oriented Yarn) and low-color-difference polyester FDY (Fully Drawn Yarn), wherein the low-color-difference polyester POY forms small yarn loops which surround the low-color-difference polyester FDY; the low-color-difference polyester POY and the low-color-difference polyester FDY are made from polyester through carrying out dissolving and washing and then carrying out spinning. The low-color-difference polyester wool-like different-shrinkage complex yarn has the rupture strength not lower than 3.0cN / dtex, the breaking elongation of 40.0+ / -3.0%, the crimp contraction of 5.50+ / -3.0%, the interlacing degree of 95+ / -5 / m, the fiber number of 150dtex to 300dtex and the color difference [delta]E smaller than 0.200. According to the low-color-difference polyester wool-like different-shrinkage complex yarn and the preparation method thereof, ethylene glycol magnesium is relatively mild and has a very small thermal degradation coefficient, and the oligomers are reduced during polymerization and are further reduced during washing, so that during the dyeing and postprocessing thermosetting of polyester fibers, the amount of the oligomers migrating to the outside of the fibers from the inside is reduced, the occurrence of color spots and streaks is reduced, and the level dyeability and rubbing fastness of the fibers are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of polyester preparation, and relates to a low-chromatic polyester wool-like hetero-shrinkage composite yarn and a preparation method thereof, in particular to a polycondensation catalyst using a mixture of ethylene glycol magnesium and ethylene glycol antimony and polyester chips The low-color difference polyester wool-like hetero-shrinkage composite yarn is boiled and washed under the conditions of 120-130 DEG C and 0.2-0.3 MPa with water and a solvent and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a polymer with excellent performance. PET is widely used in In the fields of fiber, bottle packaging, film and sheet, the output has increased year by year, and the industry status has been significantly improved. [0003] PET is a symmetrical straight-chain macromolecule, the molecular chain does not contain side chain groups, and the regularity is very good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/83C08G63/183C08G63/90D02G3/02D01D7/00D01D5/088D01D5/08
CPCC08G63/183C08G63/83C08G63/866C08G63/90D01D5/08D01D5/088D01D7/00D01F1/10D01F6/92D02G3/02
Inventor 张学东马文平沈建根王力军
Owner JIANGSU HENGLI CHEM FIBER
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