A kind of porous ultra-bright three-lobed special-shaped polyester fiber and its preparation method

A technology of three-lobed special-shaped polyester fiber, which is 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: 2018-10-30
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 method for preparing porous super-bright three-lobed special-shaped polyester fibers

Method used

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  • A kind of porous ultra-bright three-lobed special-shaped polyester fiber and its preparation method
  • A kind of porous ultra-bright three-lobed special-shaped polyester fiber and its preparation method
  • A kind of porous ultra-bright three-lobed special-shaped polyester fiber and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0062] A preparation method of modified polyester, specifically comprising the following steps:

[0063] (1) Preparation of glycol terephthalate:

[0064] 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;

[0065] (2) Preparation of ethylene terephthalate:

[0066] 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

[0074]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 t...

Embodiment 3

[0077] 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-bright trilobal profiled polyester fiber and a production method thereof. Modified polyester is spun by adopting a porous spinneret with the cross section shape of spinneret micro-pores being trilobal in order to produce the porous super-bright trilobal profiled polyester fiber; the spinneret micro-pores are arranged in the porous spinneret in an elliptical manner, the pore center of every spinneret micro-pore is positioned in a concentric ellipse, concentric ellipses are serial ellipses, the long axes of all the ellipses are collinear, and the short axes of all the ellipses are collinear. A preparation method of the modified polyester comprises the following steps: reacting terephthalic acid with ethylene glycol to prepare ethylene terephthalate, adding diol terephthalate prepared from terephthalic acid and branched chain-containing diol, and continuously reacting to obtain the modified polyester. The porous super-bright trilobal profiled polyester fiber produced in the invention has excellent performances, the liner density deviation ratio is not greater than 0.5%, the breaking strength CV value is not greater than 4.0%, the fracture elongation CV value is not greater than 8.0%, and the yarn unevenness CV value is not greater than 2.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous ultra-bright three-lobed special-shaped 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 st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/84C08G63/183C08G63/78D01D5/253
CPCC08G63/183C08G63/78D01D5/253D01F6/84
Inventor 范红卫汤方明温浩熊克丁竹君晏金龙
Owner JIANGSU HENGLI CHEM FIBER
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