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A kind of dyeable polyester dty fiber and preparation method thereof

A polyester and fiber technology, applied in the field of polyester fiber, can solve the problems of inability to meet polyester production, unfavorable polyester environmental protection production, polyester color gray, etc., to shorten the dyeing time, improve the dyeing rate, reduce the The effect of energy consumption

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

Metal antimony is harmful to the body and will bring harm to both people and nature. At present, the environmental protection problems of PET material bottle-grade chips containing antimony and other metals have attracted widespread attention. However, compared with other catalysts, antimony trioxide, etc. Antimony-based catalysts have the advantages of intermediate activity, low price, and low promotion of side reactions. Therefore, at present, antimony-based catalysts are still widely used in the market, and their market use ratio reaches 90%. Antimony-based catalysts are still difficult to be comprehensively used by other catalysts. replace
At this stage, common antimony-based catalysts on the market such as Sb 2 o 3 The amount added in the polyester synthesis process is large, and the large amount of antimony-based catalysts has a greater impact on the environment, which is not conducive to the environmental protection production of polyester. At the same time, the antimony-based catalysts will be converted into antimony in the polycondensation reaction. , so that the gray color and brightness of polyester are reduced, the greater the amount of antimony-based catalyst added, the greater the impact on the color and quality of polyester, but the antimony-based catalyst added in a small amount cannot react to all the raw materials involved in polyester synthesis. Catalysis, unable to meet the needs of polyester production

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 dyeable polyester dty fiber and preparation method thereof
  • A kind of dyeable polyester dty fiber and preparation method thereof
  • A kind of dyeable polyester dty fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A kind of preparation method of dyeable polyester DTY fiber, its concrete steps are as follows:

[0070] (1) prepare modified polyester;

[0071] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0072] (1.1.1) Mg(NO 3 ) 2 aqueous solution with a concentration of 8 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, the Mg in the mixture 2+ with Sb 3+ The molar ratio is 2:100;

[0073] (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, then wash and dry the precipitated product at a temperature of 105°C for 2.5 hours;

[0074] (1.1.3) The dried product is firstly heated to 400°C and then kept for 2.5 hours, then heated to 900°C and kept for 1.5h, and finally cooled in air and pulverized to obtain a doped modified product with an average particle size of 0.4 microns. Sb 2 o 3 Powder;

[0075] (1.2) Esterification reaction; ...

Embodiment 2

[0089] A kind of preparation method of dyeable polyester DTY fiber, its concrete steps are as follows:

[0090] (1) prepare modified polyester;

[0091] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0092] (1.1.1) Ca(NO 3 ) 2 Aqueous solution with a concentration of 5 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, the Ca in the mixture 2+ with Sb 3+ The molar ratio is 1:100;

[0093] (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, and then wash and dry the precipitated product at a temperature of 110° C. for 2 hours;

[0094] (1.1.3) The dried product was first heated to 400°C and then kept for 2 hours, then heated to 900°C and kept for 1 hour, and finally cooled in air and pulverized to obtain doped modified Sb with an average particle size of 0.4 microns 2 o 3 Powder;

[0095] (1.2) Preparation of 3-trimethylsi...

Embodiment 3

[0106] A kind of preparation method of dyeable polyester DTY fiber, its concrete steps are as follows:

[0107] (1) prepare modified polyester;

[0108] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0109] (1.1.1) Ba(NO 3 ) 2 Aqueous solution with a concentration of 10 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, Ba in the mixture 2+ with Sb 3+ The molar ratio is 3:100;

[0110] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH of the mixed solution is 9.5 to obtain a precipitated product, then wash and dry the precipitated product at a temperature of 105°C for 3 hours;

[0111] (1.1.3) The dried product was first heated to 400°C and then kept for 3 hours, then heated to 900°C and kept for 2 hours, and finally cooled in air and pulverized to obtain doped modified Sb with an average particle size of 0.5 microns 2 o 3 Powder;

[0112] (1.2) Preparation of 3-trimethylsilyl-3-methyl-...

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Abstract

The invention relates to an easily-dyed polyester DTY fiber and a preparation method thereof. The preparation method comprises the steps of preparing a modified polyester POY filament from a modifiedpolyester melt by virtue of a POY process, and processing the modified polyester POY filament by virtue of a DTY process, so as to obtain the easily-dyed polyester DTY fiber. A preparation method of modified polyester comprises the steps of uniformly mixing terephthalic acid, glycol, dihydric alcohol with a tertiary butyl lateral group and doped and modified Sb2O3 powder, and sequentially carryingout esterification reaction and condensation polymerization reaction. The dyeing rate of the prepared product is 85.3%-89.2% at 120 DEG C, and the K / S value is 22.58-24.47. The preparation method issimple, the dyeing performance is good, the addition amount of an antimony catalyst when polyester is synthesized, and the prepared product is high in dyeing rate and excellent mechanical performanceand has very great application values.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to an easy-to-dye polyester DTY fiber and a preparation method thereof. Background technique [0002] Polyester filament is a fiber-forming high polymer made from purified terephthalic acid or dimethyl terephthalate and ethylene glycol through esterification or transesterification and polycondensation reactions—polyethylene terephthalate. Glycol esters, fibers made by spinning and post-processing. The production of polyester fiber can be divided into chip spinning and melt spinning according to the state of its raw materials. Chip spinning has great flexibility, which is convenient for the reasonable layout of spinning mills, and convenient for changing varieties. It is suitable for chip spinning in the production process of small batches and multiple varieties; the melt spinning process is short, the equipment investment is small, and the PET consumption and heat consumptio...

Claims

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/695
Inventor 汤方明马文平杨超明
Owner JIANGSU HENGLI CHEM FIBER