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Production process for directly-spun terylene industrial filament of liquid-phase tackifying fusant

A liquid-phase viscosity-increasing and melt-direct spinning technology, applied in the field of spinning, can solve problems such as increased energy consumption and unstable product quality, and achieve the effects of reducing investment costs, saving costs, and solving consistency

Active Publication Date: 2010-07-07
ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Due to the dust and debris generated during the solid-state polymerization of polyester chips and the difference in viscosity inside and outside the high-viscosity chips, the quality of the existing polyester industrial yarn production products is unstable. At the same time, the energy consumption increases due to the repeated heating and cooling processes of the chips. problem, the present invention is to provide a liquid-phase viscosity-increasing melt direct-spun polyester industrial filament production process, which aims to reduce the consumption of public media and reduce costs. At the same time, by optimizing the process, the production efficiency of the system and the quality of the product are improved. Level

Method used

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  • Production process for directly-spun terylene industrial filament of liquid-phase tackifying fusant
  • Production process for directly-spun terylene industrial filament of liquid-phase tackifying fusant
  • Production process for directly-spun terylene industrial filament of liquid-phase tackifying fusant

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Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1: Production of high-strength polyester industrial yarn

[0048]1. Esterification: Put ethylene glycol and phthalic acid in a molar ratio of 1 to 1.3, put in catalyst, trimethyl phosphate, and electrostatic adsorbent to mix into a slurry, and carry out esterification reaction at a temperature of 230 to 260°C to obtain Ethylene terephthalate melt BHET;

[0049] 2. Polycondensation: Pre-condensation reaction is carried out at a temperature of 230-290 ° C and a pressure of 50-1000 Pa for 1.5-2 hours, and then the final polycondensation reaction is below 60 Pa for 60-100 minutes. The melt viscosity measured by a viscometer is 0.63-0.66dl Discharge at / g;

[0050] 3. Liquid phase thickening: Put the above melt in a vertical reactor for liquid phase thickening, the melt enters from the top for distribution, and the film is naturally formed by gravity, the vacuum degree in the kettle is 50Pa-120Pa, and the temperature is 280°C-300°C , The residence time of the me...

Embodiment 2

[0052] Embodiment 2: Production of low-shrinkage polyester industrial filament

[0053] 1. Esterification: Put ethylene glycol and phthalic acid in a molar ratio of 1 to 1.3, put in catalyst, trimethyl phosphate, and electrostatic adsorbent to mix into a slurry, and carry out esterification reaction at a temperature of 230 to 260°C to obtain Ethylene terephthalate melt BHET;

[0054] 2. Polycondensation: Pre-condensation reaction is carried out at a temperature of 230-290 ° C and a pressure of 50-1000 Pa for 1.5-2 hours, and then the final polycondensation reaction is below 60 Pa for 60-100 minutes. The melt viscosity measured by a viscometer is 0.63-0.66dl Discharge at / g;

[0055] 3. Liquid phase thickening: Put the above melt in a vertical reactor for liquid phase thickening, the melt enters from the top for distribution, and the film is naturally formed by gravity, the vacuum degree in the kettle is 50Pa-120Pa, and the temperature is 280°C-300°C , The residence time of t...

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Abstract

The invention discloses a production process for a directly-spun terylene industrial filament of a liquid-phase tackifying fusant, belonging to the technical field of spinning. The production process includes the following steps: esterification, polycondensation, liquid-phase tackification and spinning. The production process is characterized in that: in a vertical reaction kettle, liquid-phase tackfication is carried out on the fusant obtained through esterification and polycondensation of glycol and phthalic acid; the vertical reaction kettle adopts a tower type film forming structure; the fusant enters the vertical reaction kettle from the top part for distribution, and the film forming is naturally finished under the action of gravity; a backflow pipeline is provided for the discharging of the reaction kettle, the viscosity and flow rate of the fusant are controlled by the backflow adjusting, the intrinsic viscosity of the polyester fusant after being tackified in a liquid-phase manner is within 0.85 to 1.0dl / g, and the fusant is conveyed to a spinning box body by a gear pump for spinning. By reasonably designing the reaction kettle and allocating the process, the invention effectively solves the consistency between the fusant reacting condition and the staying time; meanwhile, the consumption of a public medium is reduced, and the cost is lowered; by optimizing the process, the invention increases the production efficiency of a system and improves the product quality.

Description

technical field [0001] The invention relates to a production process of liquid-phase viscosifying melt direct-spun polyester industrial filament, which belongs to the technical field of spinning. Background technique [0002] In the field of polyester industrial yarn, because the polyester chemical fiber industry has been in a low-profit and no-profit operating state for a long time, the outstanding polyester industrial yarn in 2007 and 2008 has become the target of many polyester civilian yarn enterprises. At present, the quality of polyester industrial yarn has been greatly improved, but how to reduce costs on the basis of ensuring high quality is the main problem that must be solved in the production of polyester industrial yarn. [0003] In the production of polyester industrial yarn, the chip spinning process mainly used at this stage is as follows: figure 1 As shown, according to the cost statistics, the cost of solid-phase thickening per ton of slices is 250 yuan / T, ...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D1/00D01D1/04D01F6/92
Inventor 王祖宏张朔刘雄李建国樊继明
Owner ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO LTD
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