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A kind of preparation method of micro-branched titanium-based polyester melt direct-spun poy filament

A titanium-based polyester, melt direct spinning technology, applied in the field of polyester, can solve the problems of poor homogeneity of polyester melt, improve uniform distribution, improve spinning efficiency and filament quality, improve melt viscosity drop Effect

Active Publication Date: 2022-07-08
ZHEJIANG HENGYI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problem of poor homogeneity of titanium-based polyester melt in the prior art, and provides a method for preparing micro-branched titanium-based polyester melt direct-spun POY filaments

Method used

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  • A kind of preparation method of micro-branched titanium-based polyester melt direct-spun poy filament

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preparation example Construction

[0041] A preparation method of microbranched titanium-based polyester melt direct-spun POY filament, comprising the following steps:

[0042](1) terephthalic acid and ethylene glycol are placed in a container in a mass ratio of 1:0.43-0.52, and the branching agent accounting for 30-150 ppm of polyester quality and 20-50 ppm of polyester quality are added successively into the container. The cocatalyst is prepared into slurry; the above slurry is poured into an esterification kettle that accounts for 5-30ppm of polyester mass to carry out esterification reaction, temperature is 260-270℃, pressure is 100-700KPa, reaction time is 3-5h; esterification After the end, inject a titanium-based catalyst to obtain a mixed ester compound; the injection method is: the catalyst is injected into the ester compound line 1 from the spray gun 2, and the angle between the spray gun 2 and the ester compound line 1 is 45°; the flow direction of the catalyst solution at the spray gun outlet and the...

Embodiment 1

[0053] A preparation method of micro-branched titanium-based polyester melt direct-spun POY filament, comprising the following steps:

[0054] (1) terephthalic acid and ethylene glycol are placed in a container as 1:0.48 by mass ratio, and in the container, add the branching agent sorbitol that accounts for 80ppm of polyester quality and the promoter magnesium acetate that accounts for 35ppm of polyester quality Prepare a slurry; inject the above slurry into an esterification kettle with a mass of 20 ppm of polyester for esterification reaction, temperature 265°C, pressure 350KPa a, reaction time 4h; after esterification, inject titanium-based catalyst ethylene glycol titanium, The mixed ester compound is obtained; the injection mode is: the catalyst is injected into the ester compound pipeline 1 from the spray gun 2, and the angle between the spray gun 2 and the ester compound pipeline 1 is 45°; A check valve 3 is arranged on the outside of the pipe wall, a pressure monitorin...

Embodiment 2

[0058] A preparation method of micro-branched titanium-based polyester melt direct-spun POY filament, comprising the following steps:

[0059] (1) terephthalic acid and ethylene glycol are placed in a container as 1:0.43 by mass ratio, in the container, add the branching agent pentaerythritol that accounts for 30ppm of polyester quality and the cocatalyst cobalt acetate that accounts for 50ppm of polyester quality The slurry is prepared into a slurry; the slurry is poured into an esterification kettle that accounts for 5 ppm of the polyester mass to carry out esterification reaction, the temperature is 260°C, the pressure is 700KPa a, and the reaction time is 5h; after the esterification is completed, the titanium-based catalyst titanate is injected to obtain Mixed ester compound; the injection method is: the catalyst is injected into the ester compound line 1 from the spray gun 2, and the angle between the spray gun 2 and the ester compound line 1 is 45°; the flow direction of...

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Abstract

The invention relates to the technical field of polyester. In view of the problem of poor homogeneity of the polyester melt of titanium-based catalysts, a preparation method of micro-branched titanium-based polyester melt direct-spun POY filaments is disclosed, which comprises the following steps: (1 ) terephthalic acid, ethylene glycol, branching agent, co-catalyst, and titanium-based catalyst are used as raw materials, and the polyester melt containing titanium-based catalyst is formed by esterification and polycondensation; The polyester melt is pressurized by the melt booster pump and then transported to the spinning box by the melt cooler, and extruded through the spinneret to form primary fibers; (3) The primary fibers are cooled and solidified, bundled, oiled, and rolled. Wrap around. By introducing a branching agent, the polyester is branched, the fluidity and uniform dispersion of the melt are improved, and the molecular chains broken due to degradation are reconnected to improve the melt viscosity drop; the pipeline injection catalyst is used to improve the melt viscosity. The uniformity of the catalyst can be reduced, and the melt quality of the titanium-based polyester can be improved.

Description

technical field [0001] The invention relates to the technical field of polyester, in particular to a preparation method of micro-branched titanium-based polyester melt direct-spun POY filament. Background technique [0002] Polyethylene terephthalate (PET), which is prepared by esterification and polycondensation of terephthalic acid (PTA) and ethylene glycol (EG), is currently the largest and most widely used polyester material in the world. The catalysts used in the polycondensation reaction are mainly antimony-containing catalysts. The antimony catalyst is reduced to metal antimony in the reaction, making the polyester gray; and antimony is a heavy metal, which is easily leached during the dyeing process, thereby polluting the water source, so that the use and recycling of PET may cause harm to the ecological environment, It has chronic toxicity and carcinogenicity to human body. Titanium-based catalysts are the most likely to replace antimony-based catalysts due to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/84C08G63/20C08G63/85C08G63/83C08G63/82C08G63/84C08G63/78D01D5/08
CPCD01F6/84C08G63/20C08G63/85C08G63/83C08G63/82C08G63/84C08G63/785D01D5/08
Inventor 王松林王文胥荣威李院院朱莎莎
Owner ZHEJIANG HENGYI PETROCHEM
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