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Porous super-soft cotton-like polyester fiber, and preparation method thereof

A cotton polyester fiber, super soft technology, applied in the field of polyester fiber, can solve the problems of uneven dyeing and poor mechanical properties of polyester fiber

Active Publication Date: 2017-02-15
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the problems of uneven dyeing and poor mechanical properties of existing polyester fibers, realize large-scale production and spinning, and provide a porous super soft cotton-like polyester fiber and its preparation method

Method used

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  • Porous super-soft cotton-like polyester fiber, and preparation method thereof
  • Porous super-soft cotton-like polyester fiber, and preparation method thereof
  • Porous super-soft cotton-like polyester fiber, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] A preparation method of modified polyester, specifically comprising the following steps:

[0081] (1) Preparation of glycol terephthalate:

[0082] Add terephthalic acid and 2-pentyl-1,6 hexanediol into a slurry with a molar ratio of 1:1.3 and add it to the reactor at a concentration of 50 wt%, and the amount added is 0.3% of the weight of terephthalic acid Under the catalysis of concentrated sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is normal pressure and the temperature is 180°C. 90% is the end point of the esterification reaction to obtain diol terephthalate;

[0083] (2) Preparation of ethylene terephthalate:

[0084] Put terephthalic acid and ethylene glycol into a slurry with a molar ratio of 1:1.2 and put them into the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pres...

Embodiment 2

[0091] The preparation process of the modified polyester of embodiment 2 is the same as embodiment 1, and wherein main technical parameter is referring to table 1; After step (3) adds diol terephthalate, stirs and mixes for 16 minutes, when add-on is Under the action of 0.011% of the catalyst antimony trioxide of the total weight of terephthalic acid and the stabilizer triphenyl phosphate of 0.02% of the total weight of terephthalic acid, the low vacuum stage is started under the condition of negative pressure For the polycondensation reaction, the pressure at this stage is steadily pumped from normal pressure to an absolute pressure of 490Pa, the temperature is controlled at 262 ° C, and the reaction time is 31 minutes; then continue to vacuumize and carry out the polycondensation reaction in the high vacuum stage to reduce the reaction pressure to an absolute pressure of 90Pa. The reaction temperature was controlled at 276° C., and the reaction time was 51 minutes to prepare ...

Embodiment 3

[0094] The preparation process of the modified polyester of embodiment 3 is the same as embodiment 1, and wherein main technical parameter is referring to table 1; After step (3) adds diol terephthalate, stirs and mixes for 16 minutes, when add-on is Under the action of 0.03% of the catalyst antimony trioxide of the total weight of terephthalic acid and the stabilizer triphenyl phosphate of 0.02% of the total weight of terephthalic acid, the low vacuum stage is started under the condition of negative pressure For the polycondensation reaction, the pressure at this stage is steadily pumped from normal pressure to an absolute pressure of 498Pa, the temperature is controlled at 263°C, and the reaction time is 32 minutes; then continue to vacuumize and carry out the polycondensation reaction in the high vacuum stage, so that the reaction pressure drops to an absolute pressure of 90Pa. The reaction temperature was controlled at 277° C., and the reaction time was 57 minutes to prepar...

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Abstract

The invention relates to a porous super-soft cotton-like polyester fiber, and a preparation method thereof. According to the preparation method, the porous super-soft cotton-like polyester fiber is prepared from modified polyester via porous spinneret plate spinning; spinneret orifices on a porous spinneret plate are arranged in an elliptical manner, wherein the orifice centers of the spinneret orifices are arranged in a series of concentration ellipses, the long axes of the concentration ellipses are collinear, and the short axes are collinear. The porous super-soft cotton-like polyester fiber is prepared from modified polyester POY yarn and modified polyester FDY yarn. A preparation method of the modified polyester comprises following steps: terephthalic acid is reacted with ethanediol so as to obtain ethanediol terephthalate, terephthalic acid and hexanediol containing branch chains are added are reacted so as to obtain dihydric alcohol terephthalate, and continuous reaction is carried out so as to obtain the modified polyester. The performance of the obtained porous super-soft cotton-like polyester fiber is excellent; linear density deviation ratio is equal to or less than 2.0%; breaking strength CV value is equal to or less than 4.0%; breaking elongation CV value is equal to or less than 8.0%; and crimp contraction variable coefficient CV value is equal to or less than 8.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous supersoft cotton-like polyester fiber and a preparation method thereof. Background technique [0002] Since its inception, polyethylene terephthalate (PET fiber or polyester fiber) fiber has high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance. It has a series of excellent performances, such as anti-wrinkle and non-ironing, and good crispness. It is widely used in clothing, home textiles and other fields. [0003] However, due to the high crystallinity and compact structure of PET, and there is no functional group combined with the dye on the molecular chain, it is difficult for the dye molecule to enter the fiber and dyeing is difficult. Can't satisfy people to bright-coloured beautiful, the fabric demand of unique style. [0004] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/183C08G63/78D01D5/08D01D5/088D01D5/24D01D5/253D01D7/00
CPCC08G63/183C08G63/78D01D5/08D01D5/088D01D5/24D01D5/253D01D7/00D01F6/84
Inventor 范红卫王山水沈建根马文平陈德伟张元华
Owner JIANGSU HENGLI CHEM FIBER
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