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Flat polyester filament yarn and preparation method thereof

A polyester filament, flat shape technology, applied in the fiber field, can solve the problems of high equipment requirements, high dyeing cost, low dyeing rate of flat polyester filament, etc., to reduce the dyeing temperature, reduce energy consumption, and shorten the dyeing time the effect of time

Active Publication Date: 2019-03-26
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of low dyeing rate of flat polyester filaments in the prior art, high requirements on equipment and high dyeing cost, and provide a flat polyester with excellent dyeing performance, low requirements on dyeing equipment and low dyeing cost. Filament and its preparation method

Method used

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  • Flat polyester filament yarn and preparation method thereof
  • Flat polyester filament yarn and preparation method thereof
  • Flat polyester filament yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A preparation method for flat polyester filaments, the steps are as follows:

[0056] (1) prepare modified polyester;

[0057] (1.1) Esterification reaction;

[0058] Prepare terephthalic acid, ethylene glycol, and 3-trimethylsilyl-1,2-propanediol at a molar ratio of 1:1.2:0.03 to form a slurry, add antimony trioxide, titanium dioxide, and triphenyl phosphate and mix well, The esterification reaction is carried out under pressure in a nitrogen atmosphere, the pressurized pressure is 0.3 MPa, and the temperature of the esterification reaction is 250 ° C. When the amount of water distilled in the esterification reaction reaches 90.1% of the theoretical value, it is the end point of the esterification reaction. The additions of antimony trioxide, titanium dioxide and triphenyl phosphate are respectively 0.03wt%, 0.20wt% and 0.01wt% of the terephthalic acid addition;

[0059] (1.2) polycondensation reaction;

[0060] After the esterification reaction is over, start the p...

Embodiment 2

[0069] A preparation method for flat polyester filaments, the steps are as follows:

[0070] (1) prepare modified polyester;

[0071] (1.1) Esterification reaction;

[0072] Prepare terephthalic acid, ethylene glycol, and 3-trimethylsilyl-1,2-propanediol at a molar ratio of 1:2.0:0.05 to form a slurry, add antimony ethylene glycol, titanium dioxide, and trimethyl phosphate and mix well, The esterification reaction is carried out under pressure in a nitrogen atmosphere, the pressurized pressure is 0.2MPa, and the temperature of the esterification reaction is 60°C. When the amount of water distilled out in the esterification reaction reaches 95% of the theoretical value, it is the end point of the esterification reaction. The additions of ethylene glycol antimony, titanium dioxide and trimethyl phosphate are respectively 0.05wt%, 0.25wt% and 0.05wt% of the terephthalic acid addition;

[0073] (1.2) polycondensation reaction;

[0074] After the esterification reaction is over,...

Embodiment 3

[0079] A preparation method for flat polyester filaments, the steps are as follows:

[0080] (1) prepare the glycol of band trimethylsilyl side group;

[0081] (1.1) Mix 3-trimethylsilyl-3-methylpropene, peracetic acid and dichloromethane at a molar ratio of 1:5:10, and react at a temperature of 35°C for 5 hours with stirring during the reaction. After the end, the solvent is removed, and trimethylsilylpropylene epoxide is obtained through purification and refining;

[0082] (1.2) Mix water, concentrated sulfuric acid and trimethylsilyl propylene epoxide, heat it in a water bath to 80°C under stirring conditions, keep it warm for 10 minutes, cool to room temperature after the reaction, and obtain such as The dihydric alcohol of band trimethylsilyl side group shown in formula (I), R in formula (I) is-CH(CH 3 )-, concentrated sulfuric acid is the sulfuric acid that mass concentration is 70%, when reaction starts, the mol ratio of trimethylsilyl propene epoxide and water is 1:2...

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Abstract

The invention relates to a flat polyester filament yarn and a preparation method thereof. The preparation method comprises the steps that first, terephthalic acid, ethylene glycol and a diol with a trimethylsilyl side group are uniformly mixed, and then esterification reaction and polycondensation reaction are carried out in succession to obtain modified polyester; and the modified polyester meltis made into a modified polyester FDY yarn with the section being flat through a spinneret plate with spinneret micropores being flat holes by adopting an FDY process, so that the flat polyester filament yarn is obtained; the structural formula of the diol with the trimethylsilyl side group is as shown in the description; the dye-uptake of the finally obtained product at a temperature of 120 DEG Cis 87.3-90.2%, the K / S value is 21.65-23.16, the color fastness to soaping is Level 5, the fastness to dry rubbing is Level 5, and the fastness to wet rubbing is higher than Level 4. The preparationmethod provided by the invention has the advantages of simple process and low cost; the obtained flat polyester filament yarn has excellent dyeing performance and good application prospects.

Description

technical field [0001] The invention belongs to the field of fiber technology, and relates to a flat polyester filament and a preparation method thereof. Background technique [0002] Since the industrial production of polyester fiber, due to its high strength, good elasticity, excellent heat resistance and chemical resistance and excellent dimensional stability, it is widely used as textile raw materials, which largely relieves the natural The shortage of fibers has greatly promoted the development of the textile market. With the continuous development of society, while people's consumption level is constantly improving, people have put forward higher requirements for clothing. The differentiation and high-end of polyester fiber is the inevitable choice of the market. [0003] At present, the cross-section of most ordinary fibers is circular, and most of the chemical fibers with circular cross-section have the disadvantages of smooth surface, poor adhesion, easy pilling, ...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/695C08G63/78
CPCC08G63/6956C08G63/78D01F1/10D01F6/92
Inventor 王丽丽钮臧臧汤方明
Owner JIANGSU HENGLI CHEM FIBER