Low-chromatic-aberration bright polyester DTY and preparation method thereof

A bright filament and polyester technology, applied in the direction of single-component polyester rayon, rayon manufacturing, melt spinning, etc., can solve the problems of not easy to wash off, hindering liquid flow circulation, dye color point and so on

Active Publication Date: 2016-04-06
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the temperature drops, like dyes, the solubility of oligomers in water decreases sharply with the decrease of temperature, so they will crystallize and precipitate, and the precipitated dyes and oligomers are attached to the surface of the fiber and are not easy to wash off, thus affecting dyeing and post-processing. It brings a lot of trouble. During the dyeing process, the aggregated dyes and oligomers adhere to the surface of the fiber, and dye spots, spots, and color flowers appear.
Deposits in the pipes and valves of the dyeing machine, hindering the circulation of the liquid flow, resulting in difficulty in dyeing

Method used

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  • Low-chromatic-aberration bright polyester DTY and preparation method thereof
  • Low-chromatic-aberration bright polyester DTY and preparation method thereof
  • Low-chromatic-aberration bright polyester DTY and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A preparation method of polyester DTY bright yarn with low color difference, the main process comprises:

[0075] (1) Preparation of catalyst magnesium ethylene glycol:

[0076] 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;

[0077] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0078] Esterification reaction:

[0079] 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 sodium acetate, the amount o...

Embodiment 2

[0101] A preparation method of polyester DTY bright yarn with low color difference, the main process comprises:

[0102] (1) Preparation of catalyst magnesium ethylene glycol:

[0103] 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;

[0104] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0105] Esterification reaction:

[0106] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 2.0:1, adding anti-ether agen...

Embodiment 3

[0128] A preparation method of polyester DTY bright yarn with low color difference, the main process comprises:

[0129] (1) Preparation of catalyst magnesium ethylene glycol:

[0130] 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;

[0131] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0132] Esterification reaction:

[0133] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.5:1, adding anti-ether agent sodium acetate, the amo...

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Abstract

The invention relates to a low-chromatic-aberration bright polyester DTY and a preparation method thereof. The low-chromatic-aberration bright polyester DTY is obtained through the steps that polyester is processed through soluble washing and then processed through melt spinning processing by special-shaped spinneret orifices; the breaking strength (cN / dtex) of the low-chromatic-aberration bright polyester DTY is larger than or equal to 4.0, the elongation at break (%) is 25.0+ / -2.5, the end section of the DTY is in the shape of a regular triangle, and the chromatic aberration delta E is smaller than 0.200. According to the low-chromatic-aberration bright polyester DTY and the preparation method thereof, ethylene glycol magnesium is milder, the thermal degradation coefficient is very small, side reactions caused in the reaction process are few, and generation of oligomers in the processing process is reduced; in the polyester fiber dyeing and post processing heat setting processes, the quantity of the oligomers which migrate from the interior of the fiber to the exterior of the fiber is reduced, occurrence of color spots and strip patterns is reduced, and the fiber levelling property and crockfastness are guaranteed. The bright polyester DTY has the real silk-like gloss and softness, the fabric bright sensation and the soft and elegant silk light sensation, has the excellent optical property, is thick and solid in fabric handfeel and good in bulkiness and air permeability and has the superbright flashing effect.

Description

technical field [0001] The invention belongs to the technical field of polyester preparation, and relates to a low-chromatic-difference polyester DTY bright 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 after water and solvent The low-color-difference polyester DTY bright silk yarn boiled and washed under the conditions of 120-130 DEG C and 0.2-0.3 MPa and a preparation method thereof. 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 linear macromolecule, the molecular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/83C08G63/183C08G63/90D01D5/253D01D5/08D01D5/088D01D7/00
CPCC08G63/183C08G63/83C08G63/866C08G63/90D01D5/08D01D5/088D01D5/253D01D7/00D01F1/10D01F6/92
Inventor 王彦芳李文刚汤方明林超
Owner JIANGSU HENGLI CHEM FIBER
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