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High-uniformity polyester industrial yarn used for safety belt and production method thereof

A technology of uniformity and safety belt, applied in the field of polyester fiber, can solve the problems of uneven strength, uneven fineness, difficulty in silk processing, etc.

Active Publication Date: 2017-02-08
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 polyester industrial yarn used for safety belt and production method thereof
  • High-uniformity polyester industrial yarn used for safety belt and production method thereof
  • High-uniformity polyester industrial yarn used for safety belt and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A preparation method of modified polyester, specifically comprising the following steps:

[0053] (1) Preparation of glycol terephthalate:

[0054] 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;

[0055] (2) Preparation of ethylene terephthalate:

[0056] 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

[0064] The preparation process of modified polyester is the same as Example 1, wherein the main technical parameters are referring to Table 1; after adding terephthalic acid glycol ester in step (3), stirring and mixing for 16 minutes, the addition amount is terephthalic acid The catalyst antimony trioxide of 0.011% of the total weight and the add-on are under the effect of the stabilizer triphenyl phosphate of 0.02% of the total weight of terephthalic acid, and start the polycondensation reaction of the low vacuum stage under the condition of negative pressure, the The stage pressure is pumped steadily from normal pressure to absolute pressure 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, so that the reaction pressure drops to an absolute pressure of 90Pa, and the reaction temperature is controlled at 276°C, the reaction time is 51 minutes, and...

Embodiment 3

[0067] The preparation process of modified polyester is the same as Example 1, wherein the main technical parameters are referring to Table 1; after adding terephthalic acid glycol ester in step (3), stirring and mixing for 16 minutes, the addition amount is terephthalic acid 0.03% of the total weight of the catalyst antimony trioxide and the addition of 0.02% of the total weight of terephthalic acid under the action of the stabilizer triphenyl phosphate, under the condition of negative pressure, the polycondensation reaction of the low vacuum stage is started, the The stage pressure is pumped steadily from normal pressure to absolute pressure 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, so that the reaction pressure drops to an absolute pressure of 90Pa, and the reaction temperature is controlled at 277°C, the reaction time is 57 minutes, an...

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Abstract

The invention relates to a high-uniformity polyester industrial yarn used for a safety belt and a production method thereof. The raw material of the high-uniformity polyester industrial yarn is modified polyester composed of a terephthalic acid chain segment, a glycol chain segment and a branched chain-containing dihydric alcohol chain segment. The production method is characterized in that terephthalic acid and branched chain-containing dihydric alcohol are subjected to an esterification reaction under catalysis of concentrated sulfuric acid to obtain dihydricalcohol terephthalate; then terephthalic acid and glycol are prepared for the esterification reaction to obtain ethylene terephthalate; finally ethylene terephthalate and dihydricalcohol terephthalate are stirred and mixed, under a catalyst and a stabilizing agent, the condensation polymerization reactions under a low vacuum phase and a high vacuum phase are carried out to prepare the modified polyester, and the modified polyester is subjected to metering, extrusion by a porous spinneret, cooling, oiling, stretching, thermoforming and reeling to prepare the high-uniformity polyester industrial yarn.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a high-uniformity polyester industrial yarn for safety belts 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 corrosion, l...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183D01D5/08D01D5/088D01D4/02D01D5/12D01D10/02D01D5/253D01D5/24
CPCC08G63/183D01D4/02D01D5/08D01D5/088D01D5/12D01D5/24D01D5/253D01D10/02D01F1/10D01F6/92
Inventor 范红卫范晓兵杨大矛宋光坤赵慧荣王山水汤方明刘千涵
Owner JIANGSU HENGLI CHEM FIBER
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