High uniformity high modulus low shrinkage type polyester industrial yarn and preparation method thereof

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

Active Publication Date: 2017-08-18
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

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  • High uniformity high modulus low shrinkage type polyester industrial yarn and preparation method thereof
  • High uniformity high modulus low shrinkage type polyester industrial yarn and preparation method thereof
  • High uniformity high modulus low shrinkage type polyester industrial yarn 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 in a molar ratio of 1:1.3 into a slurry and add it to the reactor, at a concentration of 50wt%, the amount added 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 add them into the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is normal pressu...

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 pr...

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Abstract

The present invention relates to a high uniformity high modulus low shrinkage type polyester industrial yarn and a preparation method thereof, wherein the raw material of the high uniformity high modulus low shrinkage type polyester industrial yarn is a modified polyester comprising a terephthalic acid chain segment, an ethylene glycol chain segment and a branch chain-containing diol chain segment. The preparation method comprises: carrying out an esterification reaction on terephthalic acid and a branch chain-containing diol under the catalysis of concentrated sulfuric acid to obtain terephthalic acid diol ester, carrying out an esterification reaction on terephthalic acid and ethylene glycol to obtain ethylene glycol terephthalate, carrying out stirring mixing on the terephthalic acid diol ester and the ethylene glycol terephthalate, carrying out a low vacuum stage condensation polymerization reaction and a high vacuum stage condensation polymerization reaction under the effects of a catalyst and a stabilizer to prepare a modified polyester, metering the modified polyester, extruding with a porous spinning plate, cooling, oiling, drawing, carrying out thermal shaping, and winding to prepare the high uniformity high modulus low shrinkage type polyester industrial yarn.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a high-uniformity, high-modulus, 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. Strong ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/183C08G63/78D01D5/253
CPCC08G63/183C08G63/78D01D5/253D01F6/84
Inventor 范红卫宋光坤王山水杨大矛范晓兵赵慧荣汤方明
Owner JIANGSU HENGLI CHEM FIBER
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