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Ultra-fine denier polyester drawn yarn and preparation method thereof

A technology of ultra-fine denier polyester and drawn yarn, applied in the direction of single-component copolyester rayon, synthetic polymer rayon chemical post-treatment, fiber type, etc., can solve the problem of low quality and poor fiber softness, etc. question

Active Publication Date: 2018-05-15
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of poor softness and low quality of fibers in the prior art, and to provide a melt direct spinning polyester supersoft composite yarn with good softness and high quality and its preparation method

Method used

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  • Ultra-fine denier polyester drawn yarn and preparation method thereof
  • Ultra-fine denier polyester drawn yarn and preparation method thereof
  • Ultra-fine denier polyester drawn yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A preparation method of superfine denier polyester drawn yarn, the steps are as follows:

[0072] (1) preparation of modified polyester;

[0073](a) Esterification reaction: terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol in a molar ratio of 1:1.2:0.03 are made into a slurry, and antimony trioxide is added , titanium dioxide and triphenyl phosphate are mixed evenly, and the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 250°C. 90% of the value is the end point of the esterification reaction, wherein the addition of antimony trioxide is 0.01% of the weight of terephthalic acid, the addition of titanium dioxide is 0.20% of the weight of terephthalic acid, and the addition of triphenyl phosphate 0.05% of the weight of terephthalic acid, wherein the structural formula of 2-ethyl-2-methyl-1,3-propanediol is as follows: ...

Embodiment 2

[0081] A preparation method of superfine denier polyester drawn yarn, the steps are as follows:

[0082] (1) preparation of modified polyester;

[0083] (a) Esterification reaction; prepare terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol in a molar ratio of 1:1.3:0.04 into a slurry, add antimony ethylene glycol and titanium dioxide After mixing with trimethyl phosphate evenly, carry out the esterification reaction under pressure in a nitrogen atmosphere, the pressurized pressure is normal pressure, and the temperature of the esterification reaction is 260°C. 91% is the end point of the esterification reaction, wherein the addition of ethylene glycol antimony is 0.02% of the weight of terephthalic acid, the addition of titanium dioxide is 0.21% of the weight of terephthalic acid, and the addition of trimethyl phosphate is 0.02% of the weight of terephthalic acid. 0.03% by weight of phthalic acid, wherein the structural formula of 2,2-diethyl-1,3-propanediol ...

Embodiment 3

[0091] A preparation method of superfine denier polyester drawn yarn, the steps are as follows:

[0092] (1) preparation of modified polyester;

[0093] (a) Esterification reaction: terephthalic acid, ethylene glycol, and 2-butyl-2-ethyl-1,3-propanediol in a molar ratio of 1:1.4:0.05 are made into a slurry, and antimony acetate and titanium dioxide are added After mixing evenly with trimethyl phosphite, carry out the esterification reaction under pressure in a nitrogen atmosphere, the pressurized pressure is 0.1MPa, and the temperature of the esterification reaction is 252°C. 92% is the end point of the esterification reaction, wherein the addition of antimony acetate is 0.03% of the weight of terephthalic acid, the addition of titanium dioxide is 0.23% of the weight of terephthalic acid, and the addition of trimethyl phosphite is 0.03% of the weight of terephthalic acid. 0.01% by weight of phthalic acid, wherein the structural formula of 2-butyl-2-ethyl-1,3-propanediol is as...

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Abstract

The invention relates to an ultra-fine denier polyester drawn yarn and a preparation method thereof. A modified polyester is subjected to metering, extruding, cooling, oiling, stretching, heat settingand winding to obtain the ultra-fine denier polyester drawn yarn. An oiling agent used for oiling contains crown ether, and content of the crown ether is 67.30 to 85.58wt%. A modified polyester molecular chain includes a terephthalic acid chain segment, an ethylene glycol chain segment and a dihydric alcohol chain segment with a branched chain. A structural formula of the ethylene glycol with thebranched chain is as follows: the structural formula is shown in the description. R1 and R2 are each independently selected from straight-chain alkylene groups with 1 to 3 carbon atoms, R3 is selected from alkyl groups with 1 to 5 carbon atoms, and R4 is selected from alkyl groups with 2 to 5 carbon atoms, and the resulting ultra-fine denier polyester drawn yarn is obtained. The single-filament fineness of the ultra-fine denier polyester drawn yarn is 0.2 to 0.3 dtex. The method is simple and reasonable, and the prepared ultra-fine denier polyester drawn yarn is soft and delicate, and has high quality.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a superfine denier polyester drawn yarn and a preparation method thereof. Background technique [0002] Since the appearance of polyethylene terephthalate (PET) fiber, it has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fiber in the world. Polyester fiber has a series of excellent properties such as high breaking strength, high elastic modulus, moderate resilience, excellent heat setting performance, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, and the fabric prepared from it has wrinkle resistance. And good stiffness, so polyester fiber is widely used in clothing and home textiles and other fields. [0003] However, during the polycondensation reaction of synthesizing ethylene terephthalate, especially when producing linear high polymers, linear and cyclic oligom...

Claims

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Application Information

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IPC IPC(8): D01F6/84D01F11/08D06M13/02D06M13/224D06M13/11D06M13/292D06M13/256C08G63/183D06M101/32
CPCC08G63/183D01F6/84D01F11/08D06M13/02D06M13/11D06M13/2243D06M13/256D06M13/292D06M2101/32
Inventor 王山水魏德新丁竹君卓怀智晏金龙张建光
Owner JIANGSU HENGLI CHEM FIBER
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