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Semi-dull polyester pre-oriented yarn and its preparation method

A pre-oriented yarn, semi-matte technology, used in rayon manufacturing, single-component polyester rayon, textiles and papermaking, etc. ash and other problems, to achieve the effect of improving the natural degradation rate, improving the catalytic efficiency of oxygen reduction, and enhancing chemical adsorption.

Active Publication Date: 2020-08-14
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antimony-based catalysts currently on the market such as Sb 2 o 3 The amount added in the polyester synthesis process is relatively large, and metal antimony will cause harm to humans and nature. The large amount of antimony-based catalysts also has a greater impact on the environment, which is not conducive to the environmentally friendly production of polyester. At the same time, the antimony-based catalyst will be converted into antimony simple substance in the polycondensation reaction, which will reduce the gray color and brightness of the polyester. The greater the amount of antimony-based catalyst added, the greater the impact on the color and quality of polyester, but the small amount of antimony-based catalyst Catalysts cannot catalyze the reactions of all raw materials involved in polyester synthesis, and cannot meet the needs of polyester production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A kind of preparation method of semi-dull polyester pre-oriented yarn, concrete steps are as follows:

[0072] (1) prepare polyester;

[0073] (1.1) Preparation of doped modified Bi 2 o 3 Powder;

[0074] (1.1.1) The concentration of 2.5wt% Ca(NO 3 ) 2 Aqueous solution with concentration of 22wt% Bi 2 o 3 The solution is mixed evenly, Bi 2 o 3 The solvent of the solution is nitric acid, the Ca in the mixture 2+ with Bi 3+ The mol ratio is 7:100;

[0075] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 10 to obtain a precipitated product, wash and dry the precipitated product at a temperature of 105°C for 2.5 hours;

[0076] (1.1.3) Heat the dried product to 400°C and keep it warm for 2.5h, then heat it up to 700°C and keep it warm for 1.5h, and finally cool it in air and pulverize it to obtain doped modified Bi with an average particle size of 0.45 microns 2 o 3 Powder;

[0077] (1.2) Preparati...

Embodiment 2

[0100] A kind of preparation method of semi-dull polyester pre-oriented yarn, concrete steps are as follows:

[0101] (1) prepare polyester;

[0102] (1.1) Preparation of doped modified Bi 2 o 3 Powder;

[0103] (1.1.1) Ca(NO 3 ) 2 Aqueous solution with concentration of 20wt% Bi 2 o 3 The solution is mixed evenly, Bi 2 o 3 The solvent of the solution is nitric acid, the Ca in the mixture 2+ with Bi 3+ The molar ratio is 5:100;

[0104] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 9 to obtain a precipitated product, wash and dry the precipitated product, the drying temperature is 105° C., and the drying time is 2 hours;

[0105] (1.1.3) Heat the dried product to 400°C and keep it warm for 2h, then heat it up to 700°C and keep it warm for 1h, and finally cool it in air and pulverize it to obtain doped modified Bi with an average particle size of 0.4 microns 2 o 3 Powder;

[0106] (1.2) Preparation of...

Embodiment 3

[0120] A kind of preparation method of semi-dull polyester pre-oriented yarn, concrete steps are as follows:

[0121] (1) prepare polyester;

[0122] (1.1) Preparation of doped modified Bi 2 o 3 Powder;

[0123] (1.1.1) Ca(NO 3 ) 2 Aqueous solution with concentration of 25wt% Bi 2 o 3 The solution is mixed evenly, Bi 2 o 3 The solvent of the solution is nitric acid, the Ca in the mixture 2+ with Bi 3+ The molar ratio is 8:100;

[0124] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH of the mixed solution is 9 to obtain a precipitated product, wash and dry the precipitated product at a temperature of 110°C for 3 hours;

[0125] (1.1.3) Heat the dried product to 400°C and keep it warm for 3 hours, then heat it up to 700°C and keep it warm for 2 hours, and finally cool it in air and pulverize it to obtain doped modified Bi with an average particle size of 0.4 microns 2 o 3 Powder;

[0126] (1.2) Preparation of doped modified Sb 2 o ...

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Abstract

The invention relates to a semi-dull polyester pre-oriented yarn and a preparing method thereof. The preparing method includes the step of preparing polyester POY yarn from polyester melt through a POY process to obtain the semi-dull polyester pre-oriented yarn. A preparing method of polyester includes the steps of evenly mixing terephthalic acid, ethylene glycol, a delustering agent, doped and modified Bi2O3 powder, doped and modified Sb2O3 powder and multi-phase solid acid-base powder calcinated at a high temperature, and sequentially conducting esterification reaction and condensation polymerization reaction, wherein the content of the delustering agent is 0.20-0.27 wt%. The specific viscosity of the prepared product is reduced by 14-17% after the product is placed under the temperatureof 25 DEG C and the relative humidity of 65% for 60 months. The preparing method is simple in process and low in cost, reduces the addition amount of an antimony catalyst and reduces the antimony emission; the prepared product is high in natural degrading speed, good in hue and good in application prospects.

Description

technical field [0001] The invention belongs to the technical field of modified fibers, and relates to a semi-dull polyester pre-oriented yarn and a preparation method thereof. Background technique [0002] Polyester is the latest in industrialization among the three major synthetic fibers (polyester, nylon and polypropylene), but it has the fastest development speed. At present, the global demand for polyester is still growing at a rate of 6-7% per year, while the global demand for nylon remains stable over the same period, and the growth rate of cotton is also maintained at about 2%. Among them, the consumption of polyester in Asia, including China, accounts for almost Half of the world's polyester fiber supply. The reason why the demand for polyester is growing so fast is that it has the following characteristics: 1) polyester has excellent performance, high modulus, and good heat resistance, and is an ideal textile fiber material; 2) the plasticity of polyester's mechan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/86
Inventor 汤方明沈建根王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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