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Degradable ultra-light FDY fiber and preparation method thereof

A fiber, bright light technology, applied in the field of degradable ultra-bright light FDY fiber and its preparation, can solve problems such as difficult biodegradation and environmental pollution

Active Publication Date: 2019-05-07
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong chemical inertness of polyester under natural conditions, it is difficult to be biodegraded, and a large number of waste polyester textiles cause serious pollution to the environment.

Method used

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  • Degradable ultra-light FDY fiber and preparation method thereof
  • Degradable ultra-light FDY fiber and preparation method thereof
  • Degradable ultra-light FDY fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A preparation method of degradable ultra-bright FDY fiber, the steps are as follows:

[0083] (1) prepare modified polyester;

[0084] (1.1) Esterification reaction;

[0085] Prepare terephthalic acid, propylene glycol, 2,2-difluoro-1,3-malonic acid and 3-trimethylsilyl-1,2-propanediol into a slurry at a molar ratio of 1:1.2:0.03, and add three After antimony oxide, titanium dioxide and triphenyl phosphate are mixed evenly, carry out the esterification reaction under pressure in a nitrogen atmosphere. When the amount reaches 90.1% of the theoretical value, it is the end point of the esterification reaction. The molar ratio of terephthalic acid to propylene glycol is 1:1.2, 2,2-difluoro-1,3-malonic acid and 3-trimethylsilyl-1 , the sum of the added amount of 2-propanediol is 3mol% of the added amount of terephthalic acid, and the molar ratio of 2,2-difluoro-1,3-malonic acid to 3-trimethylsilyl-1,2-propanediol is 2:2.5, the additions of antimony trioxide, titanium diox...

Embodiment 2

[0098] A preparation method of degradable ultra-bright FDY fiber, the steps are as follows:

[0099] (1) prepare modified polyester;

[0100] (1.1) Esterification reaction;

[0101] Make a slurry of terephthalic acid, propylene glycol, 2,2-difluoro-1,3-malonic acid and 3-trimethylsilyl-1,2-propanediol, add antimony ethylene glycol, titanium dioxide and trimethyl phosphate After the ester is mixed evenly, carry out the esterification reaction under pressure in a nitrogen atmosphere. At the end of the esterification reaction, the molar ratio of terephthalic acid to propylene glycol is 1:1.2, the sum of the added amounts of 2,2-difluoro-1,3-malonic acid and 3-trimethylsilyl-1,2-propanediol 5mol% of the amount of terephthalic acid added, the molar ratio of 2,2-difluoro-1,3-malonic acid to 3-trimethylsilyl-1,2-propanediol is 2.5:, ethylene glycol antimony, titanium dioxide and the addition of trimethyl phosphate are respectively 0.05wt%, 0.25wt% and 0.05wt% of the terephthalic a...

Embodiment 3

[0110] A preparation method of degradable ultra-bright FDY fiber, the steps are as follows:

[0111] (1) prepare the glycol of band trimethylsilyl side group;

[0112] (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;

[0113] (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 wate...

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Abstract

The invention relates to degradable ultra-light FDY fiber and a preparation method thereof. The method comprises the steps that terephthalic acid, propylene glycol, fluorine-containing dicarboxylic acid and dihydric alcohol with a trimethylsilyl side group are mixed evenly, then modified polyester is prepared through an esterification reaction and a condensation polymerization, and then the degradable ultra-light FDY fiber is prepared from modified polyester melt by means of a triangular or linear spinneret plate according to an FDY process; the fluorine-containing dicarboxylic acid is 2,2-difluoro-1,3-malonic acid or 2,2-difluoro-1,4-succinic acid or 2,2-difluoro-1,5-glutaric acid or 2,2,3,3-tetrafluoro-1,4-succinic acid, and the structural formula of dihydric alcohol with the trimethylsilyl side group is defined in the description, wherein R is -CH2-, -CH (CH3)- or -C((CH3)2)-. The cross section of the prepared ultra-light FDY fiber is shaped like a triangle or a Chinese character 'yi'. The method is simple in process, and the finally prepared fiber is good in degradable property and easy to recover and utilize.

Description

technical field [0001] The invention belongs to the technical field of modified fibers, and relates to a degradable ultra-bright FDY fiber and a preparation method thereof. Background technique [0002] At present, the high-performance and high-functionalization of polymer fibers has become an important research direction in the fiber science community. Fiber can not only be used as clothing materials, but also widely used in decoration, industrial textiles and other aspects. The development of chemical fiber is rapid, and its output and application far exceed that of natural fiber. With the improvement of social and economic development level and people's living standards, people have an urgent demand for high-grade and comfortable clothing fabrics. Glossy polyester fiber is more and more in demand in the market due to its characteristics of comfort and fashion, good gloss and good hand feeling. [0003] Ultra-bright special-shaped polyester fully drawn yarn (FDY) is wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01D5/253C08G63/695
Inventor 王山水王丽丽胡景波
Owner JIANGSU HENGLI CHEM FIBER
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