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High-uniformity activation type industrial polyester yarn and preparation method thereof

An activated and uniform technology, applied in the field of polyester fibers, which can solve the problems of difficulty in silk processing, uneven fineness, uneven strength, etc.

Active Publication Date: 2017-01-11
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 activation type industrial polyester yarn and preparation method thereof
  • High-uniformity activation type industrial polyester yarn and preparation method thereof
  • High-uniformity activation type industrial polyester yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A preparation method of modified polyester, specifically comprising the following steps:

[0059] (1) Preparation of glycol terephthalate:

[0060] 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;

[0061] (2) Preparation of ethylene terephthalate:

[0062] 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

[0070] 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

[0073] 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 activation type industrial polyester yarn and a preparation method thereof. A raw material of the high-uniformity activation type industrial polyester yarn is modified polyester consisting of a terephthalic acid chain segment, an ethylene glycol chain segment and a glycol chain segment containing branch chains. The preparation method of the high-uniformity activation type industrial polyester yarn comprises steps as follows: terephthalic acid and glycol containing the branch chains are subjected to an esterification reaction under the catalytic action of concentrated sulfuric acid, and glycol phthalate is obtained; then, phthalic acid and ethylene glycol are subjected to an esterification reaction, and ethylene glycol terephthalate is obtained; finally, glycol phthalate and ethylene glycol terephthalate are stirred, mixed and subjected to a condensation reaction at a low-vacuum stage and a high-vacuum stage under the action of a catalyst and a stabilizer, modified polyester is prepared, the modified polyester is treated through steps including metering, porous spinneret plate extrusion, cooling, oiling, stretching, heat setting, application of an activating oiling agent, winding and preactivation, and the high-uniformity activation type industrial polyester yarn is prepared.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a highly uniform activated 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] Activated polyester industrial filament has all the characteristics of polyester industrial filament: high breaking strength, low elongation at break, stable dry heat shrinkage; however, compared with viscose and nylon, its adhesive performance is relatively poor. Therefore, in the production process, it is ge...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F11/08C08G63/183C08G63/80D01D5/247D01D5/08D01D5/253
CPCC08G63/183C08G63/80D01D5/08D01D5/247D01D5/253D01F6/92D01F11/08
Inventor 范红卫王山水宋光坤赵慧荣杨大矛范晓兵杨超明刘千涵
Owner JIANGSU HENGLI CHEM FIBER
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