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Porous soft superfine polyester fiber and preparation method thereof

A polyester fiber and ultra-fine denier technology, applied in the field of polyester fiber, 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: 2017-01-04
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 porous soft superfine polyester fiber and its preparation method

Method used

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  • Porous soft superfine polyester fiber and preparation method thereof
  • Porous soft superfine polyester fiber and preparation method thereof
  • Porous soft superfine polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A preparation method of modified polyester, specifically comprising the following steps:

[0064] (1) Preparation of glycol terephthalate:

[0065] 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;

[0066] (2) Preparation of ethylene terephthalate:

[0067] 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 nor...

Embodiment 2

[0075] The preparation method of the modified polyester 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, Stirring and mixing for 16 minutes, under the action of 0.011% 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 Start the polycondensation reaction in the low vacuum stage under the condition of high pressure, the pressure in this stage is steadily pumped from normal pressure to the 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. The reaction pressure was reduced to an absolute pressure of 90 Pa, the reaction temperature was controlled at 276° C., and the rea...

Embodiment 3

[0078] The preparation method of the modified polyester of embodiment 3, 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, Stirring and mixing for 16 minutes, under the action of the 0.03% catalyst antimony trioxide and the 0.02% stabilizer triphenyl phosphate of the terephthalic acid gross weight in an add-on, under negative Start the polycondensation reaction in the low vacuum stage under the condition of high pressure, the pressure in this stage is steadily pumped from normal pressure to the 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. The reaction pressure was reduced to an absolute pressure of 90 Pa, the reaction temperature was controlled at 277° C., and the reaction time was 57 minutes to pr...

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Abstract

The invention relates to a porous soft superfine polyester fiber and a preparation method thereof. The method comprises the following steps: spinning modified polyester by adopting a porous spinneret, so as to obtain the porous soft superfine polyester fiber. The spinneret orifices on the porous spinneret are arranged in an elliptical shape, namely the centers of the spinneret orifices are positioned on concentric ellipses, the concentric ellipses are a series of ellipses, and both long axes and short axes of all the ellipses are collinear. The porous soft superfine polyester fiber is prepared by performing metering, squeezing, cooling, oiling and high-speed winding on modified polyester chips, and the preparation method of the modified polyester comprises the steps: carrying a reaction between terephthalic acid and ethylene glycol to prepare polyethylene terephthalate, adding diethyl terephthalate obtained after the reaction between terephthalic acid and a dihydric alcohol containing branched chains, and continuously carrying out the reaction, so as to obtain the modified polyester. The fiber disclosed by the invention is excellent in performance, the linear density deviation rate is less than or equal to 0.5%, the breaking strength CV value is less than or equal to 4.0%, the breaking elongation CV value is less than or equal to 8.0%, and the yarn unevenness CV value is less than or equal to 2.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous soft superfine 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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IPC IPC(8): D01F6/92C08G63/183D01D13/00D01D5/092D01D5/253
CPCC08G63/183D01D5/092D01D5/253D01D13/00D01F6/92
Inventor 李文刚汤方明王彦芳尹立新邓丽娜孙晓华
Owner JIANGSU HENGLI CHEM FIBER
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