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High-uniformity colored polyester industrial yarn and preparation method thereof

A colored polyester, uniform technology, applied in the field of polyester fiber, can solve the problems of uneven fineness, difficulty in silk processing, uneven strength, etc.

Active Publication Date: 2016-12-21
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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 colored polyester industrial yarn and preparation method thereof
  • High-uniformity colored polyester industrial yarn and preparation method thereof
  • High-uniformity colored polyester industrial yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A preparation method of modified polyester, specifically comprising the following steps:

[0057] (1) Preparation of glycol terephthalate:

[0058] 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;

[0059] (2) Preparation of ethylene terephthalate:

[0060] 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

[0067] 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

[0070] 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 a high-uniformity colored polyester industrial yarn and a preparation method thereof. The raw material of the high-uniformity colored polyester industrial yarn is modified polyester composed of terephthalic acid chain segments, ethylene glycol chain segments and dihydric alcohol chain segments containing branched chains. The method for preparing the high-uniformity colored polyester industrial yarn comprises the following steps: carrying out an esterification reaction between terephthalic acid and dihydric alcohol containing branched chains under catalysis of concentrated sulfuric acid, thereby obtaining polyethylene terephthalate; matching terephthalic acid and ethylene glycol to carry out an esterification reaction, thereby obtaining ethylene glycol terephthalate; finally, stirring and mixing the two products, carrying out condensation polymerization at low vacuum stage and high vacuum stage in the absence of catalysts and stabilizers, thereby obtaining modified polyester; metering the modified polyester, adding black master batch, performing porous spinneret extrusion, cooling, oiling, stretching, heat setting, winding, thereby obtaining the high-uniformity colored polyester industrial yarn.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a colored polyester industrial yarn with high uniformity 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] PET is a symmetrical linear macromolecule, the molecular chain does not contain side chain groups, and its regularity is very good. Its main chain contains a rigid benzene ring and a flexible hydrocarbon group, and the ester group directly connected to the benzene ring is connected to the benzene ring. The...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183D01D4/02D01D5/08D01D5/253
CPCC08G63/183D01D4/02D01D5/08D01D5/253D01F1/10D01F6/92D01F1/04D01F6/84D01F6/86C08J3/22C08L67/02C08L2203/12C08L2310/00D01F1/06
Inventor 范红卫王丽丽范晓兵杨大矛宋光坤赵慧荣王山水
Owner JIANGSU HENGLI CHEM FIBER
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