Low-chromatic-aberration polyester POY 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 difficult dyeing, color flower, not easy to wash off, etc.

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 polyester POY and preparation method thereof
  • Low-chromatic-aberration polyester POY and preparation method thereof
  • Low-chromatic-aberration polyester POY and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0066] A preparation method of polyester POY yarn with low color difference, the main process comprises:

[0067] (1) Preparation of catalyst magnesium ethylene glycol:

[0068] 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;

[0069] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0070] Esterification reaction:

[0071] 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 sodiu...

Embodiment 2

[0086] A preparation method of polyester POY yarn with low color difference, the main process comprises:

[0087] (1) Preparation of catalyst magnesium ethylene glycol:

[0088] 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;

[0089] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0090] Esterification reaction:

[0091] 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 calci...

Embodiment 3

[0106] A preparation method of polyester POY yarn with low color difference, the main process comprises:

[0107] (1) Preparation of catalyst magnesium ethylene glycol:

[0108] 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;

[0109] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0110] Esterification reaction:

[0111] 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 amount of ...

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Abstract

The invention relates to a low-chromatic-aberration polyester POY and a preparation method thereof. The low-chromatic-aberration polyester POY is obtained through polyester spinning; the breaking strength of the high-dye-uptake polyester fiber POY is larger than or equal to 2.6 cN/dtex, the elongation at break is 100.0+/-10.0%, and the chromatic aberration delta E is smaller than 0.200. According to the low-chromatic-aberration polyester POY 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; the mass percentage content of the oligomers is smaller than 0.5%, and the mass percentage content of diethylene glycol is smaller than 0.5%; the oligomers are decreased in the polymerizing process and are further decreased in the soluble washing process, and therefore 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.

Description

technical field [0001] The invention belongs to the technical field of polyester preparation, and relates to a polyester POY yarn with low color difference 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 POY 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 chain does...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/83C08G63/183C08G63/90D01D5/08D01D5/088D01D7/00
CPCC08G63/183C08G63/83C08G63/866C08G63/90D01D5/08D01D5/088D01D7/00D01F1/10D01F6/92
Inventor 王山水晏金龙王力军林贵
Owner JIANGSU HENGLI CHEM FIBER
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