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A kind of polyester ultra-bright trilobal profiled yarn with low color difference and preparation method thereof

A special-shaped yarn and polyester technology, applied in the low field of boiling and washing under the condition of 0.3MPa, can solve the problems such as not easy to wash off, hindering liquid flow circulation, dye color point, etc.

Active Publication Date: 2018-03-06
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

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 polyester ultra-bright trilobal profiled yarn with low color difference and preparation method thereof
  • A kind of polyester ultra-bright trilobal profiled yarn with low color difference and preparation method thereof
  • A kind of polyester ultra-bright trilobal profiled yarn with low color difference and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A method for preparing polyester ultra-bright trilobal profiled yarn with low color difference, the main process includes:

[0070] (1) Preparation of catalyst magnesium ethylene glycol:

[0071] 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;

[0072] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0073] Esterification reaction:

[0074] 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 ace...

Embodiment 2

[0092] A method for preparing polyester ultra-bright trilobal profiled yarn with low color difference, the main process includes:

[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, addi...

Embodiment 3

[0114] A method for preparing polyester ultra-bright trilobal profiled yarn with low color difference, the main process includes:

[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 sodiu...

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Abstract

The invention relates to low-color-difference polyester superbright trilobal profiled yarn and a preparation method thereof. The low-color-difference polyester superbright trilobal profiled yarn is prepared through carrying out spinning on polyester and has the rupture strength not lower than 3.8cN / dtex, the breaking elongation of 33.0+ / -3.0% and the color difference [delta]E smaller than 0.200. According to the low-color-difference polyester superbright trilobal profiled yarn and the preparation method thereof, ethylene glycol magnesium is relatively mild, has a very small thermal degradation coefficient and causes less side reactions during reaction, so that the production of oligomers during processing is reduced; the mass percent of the oligomers is lower than 0.5%, and the mass percent of diethylene glycol is lower than 0.5%. 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-difference polyester super-bright trilobal special-shaped yarn and a preparation method thereof, in particular to a polycondensation catalyst using a mixture of ethylene glycol magnesium and ethylene glycol antimony and a polyester chip through The low-color-difference polyester super-bright three-lobed special-shaped yarn boiled and washed with water and solvent washing agent under the conditions of 120-130 DEG 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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/86C08G63/83C08G63/90D01F6/62D01D5/253
CPCC08G63/183C08G63/83C08G63/866C08G63/90D01D5/253D01F6/62
Inventor 陈建华熊克张建光温浩魏德新
Owner JIANGSU HENGLI CHEM FIBER
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