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Low-color-difference polyester super-soft ultrafine yarn and preparation method thereof

A technology of ultra-fine yarn and polyester, applied in the direction of single-component polyester rayon, dyeing method, rayon manufacturing, etc., can solve the problems of dye color point, not easy to wash off, hinder liquid flow circulation, etc., to achieve glossy soft effect

Active Publication Date: 2016-04-20
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-color-difference polyester super-soft ultrafine yarn and preparation method thereof
  • Low-color-difference polyester super-soft ultrafine yarn and preparation method thereof
  • Low-color-difference polyester super-soft ultrafine yarn and preparation method thereof

Examples

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Effect test

Embodiment 1

[0070] A method for preparing low-chromatic-difference polyester ultra-soft ultra-fine filaments, the main process comprising:

[0071] (1) Preparation of catalyst magnesium ethylene glycol:

[0072] 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;

[0073] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0074] Esterification reaction:

[0075] 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 acetat...

Embodiment 2

[0092] A method for preparing low-chromatic-difference polyester ultra-soft ultra-fine filaments, the main process comprising:

[0093] (1) Preparation of catalyst magnesium ethylene glycol:

[0094] 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;

[0095] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0096] Esterification reaction:

[0097] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 2.0:1, adding an...

Embodiment 3

[0114] A method for preparing low-chromatic-difference polyester ultra-soft ultra-fine filaments, the main process comprising:

[0115] (1) Preparation of catalyst magnesium ethylene glycol:

[0116] 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;

[0117] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0118] Esterification reaction:

[0119] 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 a...

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Abstract

The invention relates to low-color-difference polyester super-soft ultrafine yarn and a preparation method thereof. The low-color-difference polyester super-soft ultrafine yarn is obtained by polyester spinning. A high-dye-uptake polyester fiber super-soft ultrafine yarn is greater than or equal to 3.8cN / dtex in breaking strength, is 35.0+ / -3.0 percent in elongation at break, is 0.20-0.50dtex in single yarn size, and is less than 0.200 in color difference deltaE. Ethylene glycol magnesium in the ultrafine yarn is relatively mild and is very small in thermal degradation coefficient, less side reactions are caused in a reaction process, and the production of oligomers in a processing process is reduced; oligomers produced in a polymerization process are reduced, and oligomers produced in a dissolving-washing process are further reduced, so that the quantity of the oligomers migrating from the insides to the outsides of fibers are reduced in polyester fiber dyeing and post-processing heat setting, the occurrence of color spots and stripes is reduced, and the fiber levelling property and rubbing fastness are ensured. The softness of a super-soft ultrafine polyester fiber is reflected by a very small yarn size and a small composite-yarn total size, and a fabric made of the super-soft ultrafine polyester fiber has very soft and fine handfeel, is soft in color and luster, and is comfortable and breathable.

Description

technical field [0001] The invention belongs to the technical field of polyester preparation, and relates to a low-chromatic-difference polyester ultra-soft ultra-fine wire 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 passed through water. Low-color-difference polyester ultra-soft ultra-fine filaments boiled and washed with a solvent-washing agent at 120-130°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 macromole...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/83C08G63/86D01D5/08D06P1/16D06P3/54
CPCC08G63/183C08G63/83C08G63/866D01D5/08D01F1/10D01F6/92D06P1/16D06P3/54
Inventor 尹立新张建光熊克魏德新
Owner JIANGSU HENGLI CHEM FIBER
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