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Porous polyester fibre POY filaments and preparation method thereof

A porous polyester and fiber technology, applied in the field of polyester fiber, can solve problems such as poor mechanical properties and uneven dyeing of polyester fiber, and achieve the effects of improving processing performance, improving dyeing performance, and reducing melt viscosity

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

[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 polyester fiber POY filament and its preparation method

Method used

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  • Porous polyester fibre POY filaments and preparation method thereof
  • Porous polyester fibre POY filaments and preparation method thereof
  • Porous polyester fibre POY filaments and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A preparation method of modified polyester, specifically comprising the following steps:

[0062] (1) Preparation of glycol terephthalate:

[0063] 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;

[0064] (2) Preparation of ethylene terephthalate:

[0065] 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

[0073] 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

[0076]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 pre...

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Abstract

The invention relates to porous polyester fibre POY filaments and a preparation method thereof. Porous polyester fibre POY filaments are prepared by spinning modified polyester fibre with a porous spinneret; an arranging mode of spinneret holes on the porous spinneret is in an elliptical arrangement, a center of spinneret holes is positioned on a concentric ellipse, the concentric ellipse comprises a series of ellipses, long axes of all ellipses are collinear, and short axes of all ellipses are collinear. Modified polyester slices are obtained by cutting granules of modified polyester, and the porous polyester fibre POY filaments are prepared by metering, extrusion, cooling, oiling, and reeling of modified polyester slices, and the preparation method of the modified polyester comprises the following steps: a reaction is carried out for terephthalic acid and glycol, in order to obtain ethylene terephthalate; ester of dihydric alcohol and terephthalic acid obtained by reaction between added terephthalic acid and dihydric alcohol containing branched chains is prepared, and a reaction is carried out continuously in order to obtain modified polyester. The filaments have excellent fiber performance, linear density deviation ratio is less than or equal to 0.2%, breaking strength CV value is less than or equal to 2.5%, and fracture elongation CV value is less than or equal to 5.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous polyester fiber POY filament 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 f...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/183C08G63/78D01D4/02D01D5/08D01D5/253D01D5/24
CPCC08G63/183C08G63/78D01D4/02D01D5/08D01D5/24D01D5/253D01F6/84
Inventor 范红卫陈德伟尹立新晏金龙张元华罗凯敏
Owner JIANGSU HENGLI CHEM FIBER
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