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High-uniformity, high-strength and ultralow-shrinkage type polyester industrial yarn and preparation method thereof

A uniform and ultra-low shrinkage technology, applied in the field of polyester fiber, can solve problems such as uneven strength, difficulty in silk processing, and uneven denier

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

[0006] In the spinning process, although the surrounding air has obvious advantages, it still cannot solve the problem of uneven cooling of porous filaments: since the spun silk is extruded from the circular spinneret, it is cooled by the surrounding air, Due to the large number of circles of the circular spinneret, it is difficult for the ring air to enter the innermost layer, resulting in that the innermost filaments may not be cooled after the outermost filaments have cooled, resulting in uneven fineness of the resulting filaments. Problems such as uneven strength make subsequent further processing of silk difficult

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • High-uniformity, high-strength and ultralow-shrinkage type polyester industrial yarn and preparation method thereof
  • High-uniformity, high-strength and ultralow-shrinkage type polyester industrial yarn and preparation method thereof
  • High-uniformity, high-strength and ultralow-shrinkage type polyester industrial yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
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 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

[0077] 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 high-uniformity, high-strength and ultralow-shrinkage type polyester industrial yarn and a preparation method thereof. The high-uniformity, high-strength and ultralow-shrinkage type polyester industrial yarn is prepared from modified polyester formed by terephthalic acid chain segments, glycol chain segments and branch-containing dihydric alcohol chain segments. The preparation method of the high-uniformity, high-strength and ultralow-shrinkage type polyester industrial yarn includes the steps that terephthalic acid and branch-containing dihydric alcohol are subjected to an esterification reaction under catalysis of concentrated sulfuric acid to obtain terephthalic acid dihydric alcohol ester; then terephthalic acid and glycol are matched for an esterification reaction, and terephthalic acid gylcol ester is obtained; finally, terephthalic acid dihydric alcohol ester and terephthalic acid gylcol ester are stirred and mixed, polycondensation at a low-vacuum stage and a high-vacuum stage is carried out under the effects of a catalyst and a stabilizer, modified polyester is prepared and subjected to metering, porous spinneret plate extrusion, cooling, oiling, stretching, heat setting and winding, and the high-uniformity, high-strength and ultralow-shrinkage type polyester industrial yarn is prepared.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a high-uniformity, high-strength, ultra-low shrinkage polyester industrial yarn 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 anti-wrinkle, good stiffness, etc. It is widely used in clothing, home textiles and other fields. [0003] Industrial polyester fibers mainly refer to chemical fibers with relatively special physical and chemical structures, properties and uses, or special functions, which are mostly used in industry, national defense, medical treatment, environmental protection and cutting-edge science. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/183C08G63/78D01D4/02D01D5/08
CPCC08G63/183C08G63/78D01D4/02D01D5/08D01F6/84
Inventor 范红卫汤方明宋光坤赵慧荣王山水杨大矛范晓兵张元华
Owner JIANGSU HENGLI CHEM FIBER
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