Low-color-difference polyester HOY (high oriented yarn) fibers and preparation method thereof

A polyester and chromatic aberration technology, applied in the direction of single-component polyester rayon, rayon manufacturing, melt spinning, etc., can solve the problems of color pattern, obstruction of liquid flow circulation, trouble in dyeing and post-processing, etc.

Active Publication Date: 2016-03-30
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-proc

Method used

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  • Low-color-difference polyester HOY (high oriented yarn) fibers and preparation method thereof
  • Low-color-difference polyester HOY (high oriented yarn) fibers and preparation method thereof
  • Low-color-difference polyester HOY (high oriented yarn) fibers and preparation method thereof

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preparation example Construction

[0052] A kind of preparation method of low color difference polyester HOY yarn of the present invention, terephthalic acid and ethylene glycol undergo esterification and polycondensation under the catalysis of the mixture of ethylene glycol magnesium and ethylene glycol antimony to obtain polyester, and then through Cut into pellets to obtain polyester chips, and then dissolve and wash the polyester chips to obtain polyester; then measure, extrude, cool, oil and high-speed winding to obtain low-color-difference polyester fiber HOY filaments.

[0053] 1. Dye:

[0054] Disperse Brilliant Blue 2BLN, 5% (o.w.f)

[0055] 2. Dyeing process:

[0056] The fiber is dyed at 70-80°C for 10-15 minutes, the temperature rise rate is 1.0-2.0°C / min, the temperature is kept at 120-130°C for 40-60 minutes, the temperature is lowered, and the reduction cleaning is performed at 70-80°C for 20-30 minutes.

[0057] 3. Determination of dyeing percentage

[0058] Carry out dyeing according to the ...

Embodiment 1

[0070] A preparation method of low color difference polyester HOY yarn, 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 acetate, the amount of sodium ac...

Embodiment 2

[0091] A preparation method of low color difference polyester HOY yarn, the main process comprising:

[0092] (1) Preparation of catalyst magnesium ethylene glycol:

[0093] 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;

[0094] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0095] Esterification reaction:

[0096]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 agent calcium ac...

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Abstract

The invention relates to low-color-difference polyester HOY (high oriented yarn) fibers and a preparation method thereof. The low-color-difference polyester HOY fibers are prepared from spun polyester yarn, and the breaking strength of the polyester HOY fibers with high dye uptake is larger than or equal to 3.0 cN/dtex; the elongation at break is 50.0% plus or minus 4.0%, and the color difference delta E is smaller than 0.200. Ethylene glycol magnesium is relatively mild, the thermal degradation coefficient is small, fewer side reactions are caused in the reaction process, and generation of oligomers is reduced in the processing process; the mass percentage of oligomers is smaller than 0.5%, and the mass percentage of diethylene glycol is smaller than 0.5%; the oligomers are reduced in the polymerization process and further reduced in the dissolving process, accordingly, the quantity of the oligomers transferred from the inside of the fibers to the outside of the fibers is reduced in the processes of polyester fiber dyeing and post-processing thermal setting, colored patches and streaks are reduced, and the fiber leveling property and the rubbing fastness are guaranteed. The HOY fibers have lower crystallinity, the breaking elongation is larger and the initial modulus of the fibers is smaller, so that the fibers have good flexibility.

Description

technical field [0001] The invention belongs to the technical field of polyester preparation, and relates to a low-chromatic-difference polyester HOY 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 washed with water and dissolved The low color difference polyester HOY yarn boiled and washed 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. [0003] PET is a symmetrical linear macromolecule, the molecular chain does not co...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/83C08G63/183C08G63/90D01D5/08D01D5/088D01D7/00
CPCC08G63/183C08G63/83C08G63/866C08G63/90D01D5/08D01D5/088D01D7/00D01F1/10D01F6/92
Inventor 金管范魏德新张烨邵义伟丁竹君卓怀智
Owner JIANGSU HENGLI CHEM FIBER
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