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Preparation method of modified porous polyester

A technology for modifying polyester and fiber, which is applied in the field of polyester fiber, which can solve the problems of uneven dyeing and poor mechanical properties of polyester fiber, and achieve the effects of improving dyeing performance, improving processing performance, and increasing the degree of diffusion

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

[0009] 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 preparation method of porous modified polyester fibers

Method used

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  • Preparation method of modified porous polyester
  • Preparation method of modified porous polyester
  • Preparation method of modified porous polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of preparation method of polyester fiber, specifically comprises the following steps:

[0057] (1) Preparation of glycol terephthalate:

[0058] Put terephthalic acid and 2-pentyl-1,3 propanediol with a molar ratio of 1:1.3 into a slurry 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 sulfuric acid, 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. Time is the end point of the esterification reaction to obtain diol terephthalate;

[0059] (2) Preparation of ethylene terephthalate:

[0060] 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 pressure is...

Embodiment 2

[0067] The preparation method of the polyester fiber of embodiment 2, wherein the preparation process of modified polyester is with embodiment 1, wherein main technical parameter is referring to table 1; After step (3) adds glycol terephthalate, stir Mixed for 16 minutes, under the action of 0.011% catalyst antimony trioxide and 0.02% stabilizer triphenyl phosphate based on the total weight of terephthalic acid, under negative pressure Start the polycondensation reaction in the low vacuum stage under the condition of low vacuum, the pressure in this stage is pumped steadily from normal pressure to absolute pressure 490Pa, the temperature is controlled at 262 ° C, and the reaction time is 31 minutes; then continue to vacuum, carry out the polycondensation reaction in the high vacuum stage, so that The reaction pressure was reduced to an absolute pressure of 90 Pa, the reaction temperature was controlled at 276° C., and the reaction time was 51 minutes to prepare a modified polye...

Embodiment 3

[0070]The preparation method of the polyester fiber of embodiment 3, wherein the preparation process of modified polyester is with embodiment 1, and wherein main technical parameter is referring to table 1; After step (3) adds glycol terephthalate, stir Mixed for 16 minutes, under the action of 0.03% catalyst antimony trioxide of the total weight of terephthalic acid and 0.02% of the stabilizer triphenyl phosphate of the total weight of terephthalic acid, under negative pressure Start the polycondensation reaction in the low vacuum stage under the condition of low vacuum, the pressure in this stage is pumped steadily from normal pressure to absolute pressure 498Pa, the temperature is controlled at 263 ° C, and the reaction time is 32 minutes; then continue to vacuum, carry out the polycondensation reaction in the high vacuum stage, so that The reaction pressure was reduced to an absolute pressure of 90 Pa, the reaction temperature was controlled at 277° C., and the reaction tim...

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Abstract

The invention relates to a preparation method of modified porous polyester. The modified 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 modified porous polyester is prepared from modified polyester through metering, extruding by the porous spinneret plate, cooling, oiling, drawing, heat setting and winding; a preparation method of the modified polyester comprises the following steps: terephthalic acid and ethylene glycol react to prepare ethylene terephthalate, terephthalic acid and 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 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%, the yarn unevenness CV value is lower than or equal to 2.0%, and the boiling water shrinkage is 7.5% plus or minus 0.5%.

Description

technical field [0001] The invention belongs to the field of polyester fibers and relates to a preparation method of porous modified polyester fibers. 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 for the difficul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92C08G63/183D01D5/247D01D5/08D01D5/253
CPCC08G63/183D01D5/08D01D5/247D01D5/253D01F6/92
Inventor 范红卫尹立新汤方明刘志立王山水王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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