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 spinne

Method used

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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
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Example Embodiment

[0055] Example 1

[0056] A method for preparing modified polyester specifically includes the following steps:

[0057] (1) Preparation of glycol terephthalate:

[0058] The terephthalic acid with a molar ratio of 1:1.3 and 2-pentyl-1,3 propylene glycol were prepared into a slurry and added to the reactor at a concentration of 50% by weight and the added amount was 0.3% by weight of terephthalic acid. Under the catalysis of sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurization pressure is normal pressure and the temperature is 180°C. When the amount of water distilled in the esterification reaction reaches 90% of the theoretical value When is the end point of the esterification reaction, the diol terephthalate is obtained;

[0059] (2) Preparation of ethylene terephthalate:

[0060] The terephthalic acid and ethylene glycol were prepared into a slurry with a molar ratio of 1:1.2 and then added...

Example Embodiment

[0066] Example 2

[0067] The preparation method of the modified polyester of Example 2, wherein the preparation process of the modified polyester is the same as that of Example 1, and the main technical parameters are shown in Table 1. After adding the glycol terephthalate in step (3), Stir and mix for 16 minutes. Under the action of adding 0.011% of the total weight of terephthalic acid to the catalyst antimony trioxide and adding 0.02% of the total weight of terephthalic acid to stabilizer triphenyl phosphate, the negative Under the condition of low pressure, the polycondensation reaction in the low-vacuum stage was started. The pressure in this stage was smoothly pumped from normal pressure to an absolute pressure of 490Pa, the temperature was controlled at 262°C, and the reaction time was 31 minutes; The reaction pressure is reduced to an absolute pressure of 90 Pa, the reaction temperature is controlled at 276° C., and the reaction time is 51 minutes to obtain a modified po...

Example Embodiment

[0069] Example 3

[0070] The preparation method of the modified polyester of Example 3, wherein the preparation process of the modified polyester is the same as that of Example 1, and the main technical parameters are shown in Table 1. After adding the glycol terephthalate in step (3), Stir and mix for 16 minutes. Under the action of adding 0.03% of the total weight of terephthalic acid to the catalyst antimony trioxide and adding 0.02% of the total weight of terephthalic acid to stabilizer triphenyl phosphate, the negative Start the polycondensation reaction in the low vacuum stage under the condition of low pressure, the pressure in this stage is smoothly pumped from normal pressure to an absolute pressure of 498 Pa, the temperature is controlled at 263°C, and the reaction time is 32 minutes; then the vacuum is continued to perform the polycondensation reaction in the high vacuum stage. The reaction pressure was reduced to an absolute pressure of 90 Pa, the reaction temperatur...

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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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