Soft wool-like porous polyester and preparation method thereof

A wool polyester, soft technology, applied in the field of polyester fiber, can solve the problems of poor mechanical properties, uneven dyeing of polyester fiber, etc.

Active Publication Date: 2017-01-11
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 spinning, and provide a porous soft wool-like polyester fiber and its preparation method

Method used

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  • Soft wool-like porous polyester and preparation method thereof
  • Soft wool-like porous polyester and preparation method thereof
  • Soft wool-like porous polyester 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-1,4-butanediol 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 addition amount 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 pr...

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 soft wool-like porous polyester and a preparation method thereof. The soft wool-like porous polyester is prepared from modified polyester through spinning by a porous spinneret plate; spinneret holes in the porous spinneret plate are arranged elliptically, that is, the centers of the spinneret holes are located on concentric ellipses which are a series of ellipses, major axes of the ellipses are collinear, and minor axes of the ellipses are collinear. The soft wool-like porous polyester is prepared from modified polyester POY and modified polyester FDY through processing; a preparation method of the modified polyester comprises the following steps: terephthalic acid and ethylene glycol react to prepare ethylene terephthalate, terephthalic acid and propylene glycol containing branched chains are added for a reaction, glycol terephthalate is prepared and continuously subjected to a reaction, and modified polyester is obtained. The prepared fiber has excellent performance, the linear density deviation is lower than or equal to 2.0%, the breaking strength CV value is lower than or equal to 4.0%, the breaking elongation CV value is lower than or equal to 8.0%, and the crimp contraction variation coefficient CV value is lower than or equal to 8.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous soft wool-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 reason...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92C08G63/183D01D5/247D01D5/08D01D5/253D01D4/02
CPCC08G63/183D01D4/02D01D5/08D01D5/247D01D5/253D01F6/92
Inventor 范红卫汤方明沈建根王建根王丽丽邵义伟
Owner JIANGSU HENGLI CHEM FIBER
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