A kind of low color difference polyester imitation cotton type differential shrinkage composite yarn and its preparation method

A composite yarn and different shrinkage technology, which is applied in the direction of single-component polyester rayon, melt spinning, etc., can solve the problem of increased air content in PET different shrinkage mixed fiber composite yarn fabrics

Active Publication Date: 2017-12-12
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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of low color difference polyester imitation cotton type differential shrinkage composite yarn and its preparation method
  • A kind of low color difference polyester imitation cotton type differential shrinkage composite yarn and its preparation method
  • A kind of low color difference polyester imitation cotton type differential shrinkage composite yarn and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] A preparation method of a low-chromatic-difference polyester imitation cotton type different shrinkage composite yarn, the main process includes:

[0086] (1) Preparation of catalyst magnesium ethylene glycol:

[0087] 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;

[0088] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0089] Esterification reaction:

[0090] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.2:1, adding...

Embodiment 2

[0124] A preparation method of a low-chromatic-difference polyester imitation cotton type different shrinkage composite yarn, the main process includes:

[0125] (1) Preparation of catalyst magnesium ethylene glycol:

[0126] 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 10V, the cathode current density is 200mA, electrolyze at 60°C for 12 hours, after the electrolysis ends 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;

[0127] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0128] Esterification reaction:

[0129] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephtha...

Embodiment 3

[0163] A preparation method of a low-chromatic-difference polyester imitation cotton type different shrinkage composite yarn, the main process includes:

[0164] (1) Preparation of catalyst magnesium ethylene glycol:

[0165] 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 7V, the cathode current density is 160mA, and electrolyze for 11 hours at 55°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;

[0166] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0167] Esterification reaction:

[0168] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol and terephthalic acid is 1.5:1, addin...

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Abstract

The invention relates to a low-color-difference polyester cotton-imitating different-shrinking composite filament and a preparation method thereof. The low-color-difference polyester cotton-imitating different-shrinking composite filament is a composite filament composed of a low-color-difference polyester POY filament and a low-color-difference polyester FDY filament through fiber blending. The low-color-difference polyester POY filament forms fine filament rings surrounding the low-color-difference polyester FDY filament. The low-color-difference polyester POY filament and the low-color-difference polyester FDY filament are formed by dissolving and washing polyester and performing spinning. The low-color-difference polyester cotton-imitating different-shrinking composite filament is not less than 2.0 cN / detx in breaking strength, is 18.0% + / - 3.0% in breaking elongation, is 4.8% + / - 3.0% in crimp contraction, is 15 / m + / - 5 / m in network degree and is less than 0.200 in color difference [delta]E. In the invention, magnesium ethylene glycolate is mild and is low in thermal degradation coefficient. In a polymerization process, oligomer is reduced and is further reduced during the dissolving and washing process, so that in the polyester fiber, after dying and during after-treatment thermal shaping, the migration amount of the oligomer from interior to exterior is reduced, thereby reducing color spots and bars and ensuring fiber level dyeing and friction fastness.

Description

technical field [0001] The invention belongs to the technical field of polyester preparation, and relates to a low-color-difference polyester-like cotton-like differential 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 Low-color-difference polyester-like cotton-like differential shrinkage composite yarn boiled and washed with water and solvent at 120-130°C and 0.2-0.3 MPa and its preparation method. Background technique [0002] Polyethylene terephthalate (PET) is a polymer with excellent properties. PET is widely used for its high modulus, high strength, crispness, good shape retention, purity and hygiene, and good barrier properties. In the fields of fiber, bottle packaging, film and sheet, etc., the output is increasing year by year, and the industry status has been significantly improved. [0003] PET is a symmetrical lin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/83C08G63/183D01D5/08
CPCC08G63/183C08G63/83C08G63/866D01D5/08D01F1/10D01F6/92
Inventor 沈建根马文平张学东晏金龙
Owner JIANGSU HENGLI CHEM FIBER
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