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Easily-dyed porous modified polyester fiber and preparation method thereof

A technology for modifying polyester and fiber, applied in the field of modified polyester fiber, can solve problems such as unfavorable processing, inability to meet polyester production, and small increase in free volume, so as to increase the free volume of space and shorten the dyeing process. The effect of time and diffusion rate increase

Active Publication Date: 2019-05-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the usual dyeing of PET fibers is generally to choose disperse dyes for dyeing under the condition of high temperature and high pressure. When the temperature reaches above the glass transition temperature of PET fibers, the gap between PET fiber polymer molecules increases, but the free volume increases. The degree is small, the dyeing rate is not high, the high energy consumption and low dyeing rate brought by the high temperature and high pressure method are the main problems now.
In addition, the melt viscosity of PET fiber is high, which is not conducive to processing
[0005] In addition, at this stage, the catalysts often used in the polyester synthesis process are antimony-based catalysts, and the 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 small amount of antimony-based catalyst can not react to all the raw materials involved in polyester synthesis. Catalysis, unable to meet the needs of polyester production

Method used

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  • Easily-dyed porous modified polyester fiber and preparation method thereof
  • Easily-dyed porous modified polyester fiber and preparation method thereof
  • Easily-dyed porous modified polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A kind of preparation method of dyeable porous modified polyester fiber, concrete steps are as follows:

[0068] (1) prepare modified polyester;

[0069] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0070] (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;

[0071] (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;

[0072] (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;

[0073] (1.2) Synthesis of 2,2,3...

Embodiment 2

[0094] A kind of preparation method of dyeable porous modified polyester fiber, concrete steps are as follows:

[0095] (1) prepare modified polyester;

[0096] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0097] (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;

[0098] (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;

[0099] (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;

[0100] (1.2) Synthesis of 2,2,3,4...

Embodiment 3

[0108] A kind of preparation method of dyeable porous modified polyester fiber, concrete steps are as follows:

[0109] (1) prepare modified polyester;

[0110] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0111] (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;

[0112] (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;

[0113] (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;

[0114] (1.2) Synthesis of 2,2,3,4,5,5-hexameth...

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Abstract

The invention relates to an easily-dyed porous modified polyester fiber and a preparation method thereof. The easily-dyed porous modified polyester fiber is prepared by a porous spinneret plate through an FDY process. The preparation method of modified polyester comprises the following steps: uniformly mixing terephthalic acid, glycol, dihydric alcohol with a silicon-containing main chain, 2,2,3,4,5,5-hexamethyl-3,4-hexanediol and a metal oxide doped and modified Sb2O3 powder, and sequentially carrying out esterification reaction and condensation polymerization reaction, wherein dihydric alcohol with the silicon-containing main chain is dimethylsilyl diol, dimethyl diphenyl disiloxane diol or tetramethyldisiloxane diol, and the structural formula of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol isas follows: formula (shown in the description). The dyeing rate and K / S value of the prepared easily-dyed porous modified polyester fiber are high. The method is simple in process, and the finally prepared modified polyester fiber is good in dyeing performance and good in quality.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to an easy-to-dye porous modified polyester fiber and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET fiber or polyester fiber) fiber has high breaking strength and elastic modulus, moderate resilience, excellent heat setting performance, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, etc. A series of excellent properties, and its fabric also has the advantages of anti-wrinkle, non-ironing and good crispness, so it is widely used in clothing, home textiles and other fields. [0003] Porous polyester fiber and its processed products have the characteristics of good hand feeling, strong three-dimensional effect and unique style, and have been widely used in various fields, especially suitable for making high-performance textiles such as tennis clothes, stockings or medi...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/695
CPCC08G63/86D01F6/92C08G63/6956C08G77/445C08G63/183D01D5/247C08K3/2279C08K2201/005C01G30/005C01P2004/62C01P2002/54C08L67/02C08G63/695D01D5/088D01D5/16D01F1/10D01F6/62D10B2331/04D10B2401/10D10B2401/14C08K2003/2241D02J1/228C01G30/004
Inventor 孙晓华康爱旗王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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