Process for producing polyester industrial yarns by liquid-phase tackified melts in multi-end direct spinning manner

A polyester industrial yarn, liquid phase tackifying technology, applied in the directions of melt spinning, stretch spinning, textiles and papermaking, etc., can solve the problems that the polyester industrial yarn process has not yet appeared, and achieve high production efficiency, increased production capacity, material The effect of short turnaround times

Active Publication Date: 2012-07-25
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

[0003] At present, the process of producing polyester industrial yarn by multi-head direct spinning of liquid-phase viscosifying melt has not yet appeared.

Method used

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  • Process for producing polyester industrial yarns by liquid-phase tackified melts in multi-end direct spinning manner
  • Process for producing polyester industrial yarns by liquid-phase tackified melts in multi-end direct spinning manner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Melt 16 ends of direct spinning 1000D high-strength polyester industrial yarn.

[0029] (1), liquid phase viscosity increase:

[0030] The low-viscosity polyester melt with an intrinsic viscosity of 0.64-0.69dl / g is obtained through melt polycondensation. The low-viscosity polyester melt is boosted by booster pump 1, filtered by duplex filter 2, and transported to the vertical liquid The top of the phase thickening reactor 3 flows down evenly in the vertical liquid phase thickening reactor 3 due to the natural film formation by gravity. After ~90 minutes, a high-viscosity polyester melt with an intrinsic viscosity of 0.90-1.10 dl / g was obtained.

[0031] (2), multi-head spinning:

[0032] The high-viscosity polyester melt after liquid-phase thickening is transported to the spinning box 4 of each spinning position. Each spinning position adopts 16 direct spinning. After being metered and filtered by the metering pump, the body is sprayed out from the spinne...

Embodiment 2

[0039] Example 2: Melt 16 head direct spinning 1000D low shrinkage polyester industrial yarn.

[0040] (1) Liquid phase thickening:

[0041] A low-viscosity polyester melt with an intrinsic viscosity of 0.64-0.69dl / g is obtained by melt polycondensation. The low-viscosity melt is boosted by a booster pump, filtered, and then transported to the top of a vertical liquid-phase viscosifying reactor. The film is formed and flowed down evenly, the temperature in the reactor is 270-290° C., the pressure is 50-130 Pa, and after 60-90 minutes, a high-viscosity polyester melt with an intrinsic viscosity of 0.90-1.00 dl / g is obtained.

[0042] (2), multi-head spinning:

[0043]The liquid-phase viscosified melt is transported to the spinning box of each spinning position. The temperature of the box is 290-300°C. Each spinning position contains two parallel spinning boxes. Each box is equipped with 4 Planetary pumps, planetary pumps contain 1 melt inlet and 4 melt outlets, and each box i...

Embodiment 3

[0049] Example 3: Melt 24 ends of direct spinning 500D high-strength polyester industrial yarn.

[0050] (1) Liquid phase thickening:

[0051] A low-viscosity polyester melt with an intrinsic viscosity of 0.64-0.69dl / g is obtained by melt polycondensation. The low-viscosity melt is boosted by a booster pump, filtered, and then transported to the top of a vertical liquid-phase viscosifying reactor. The film is uniformly flowed down, the temperature in the reactor is 270-290° C., the pressure is 50-130 Pa, and after 60-90 minutes, a high-viscosity polyester melt with an intrinsic viscosity of 0.90-1.10 dl / g is obtained.

[0052] (2) Multi-head spinning:

[0053] The liquid-phase viscosified melt is transported to the spinning box of each spinning position. The temperature of the box is 290-300 ° C. Each spinning position contains two parallel spinning boxes. Each box is equipped with 4 Planetary pumps, planetary pumps contain 1 melt inlet and 6 melt outlets, and each box is eq...

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Abstract

The invention discloses a process for producing polyester industrial yarns by liquid-phase tackified melts in a multi-end direct spinning manner, which belongs to the technical field of polyester industrial yarns and includes the following steps: liquid-phase tackifying; obtaining high-viscosity polyester melts with intrinsic viscosity ranging from 0.90dl / g to 1.10dl / g by tackifying low-viscosity polyester melts in a liquid phase; double-end spinning; directly conveying the polyester melts after being subjected to liquid-phase tackifying to different spinning positions capable of spinning in 16-24 ends; drafting and thermal-forming; winding and forming; and utilization of a twin winding machine to perform high-speed winding of 16-24 spindle spinning cakes. In the process, 16-end direct spinning of high-strength or low-shrinkage polyester industrial yarns with a single end ranging from 800D to 1300D and 24-end direct spinning of low-denier polyester industrial yarns with a single end ranging from 100D to 500D can be realized on the same spinning position, and product production efficiency is high, performance is stable, production energy consumption and equipment investment cost are low.

Description

Technical field: [0001] The invention relates to a production process of liquid-phase viscosifying melt multi-head direct-spun polyester industrial yarn, specifically belonging to the field of polyester industrial fiber manufacturing. Background technique: [0002] At present, the solid-phase polycondensation melt-spinning process route is widely used at home and abroad to produce polyester industrial yarns, that is, the low-viscosity polyester melt obtained by melt polycondensation is pelletized, dried, crystallized, and solid-phase polycondensed to obtain an intrinsic viscosity of 0.90-1.10. dl / g high-viscosity polyester chips, the chips are dried and melt-spun with a screw extruder. Using this process to produce polyester industrial yarns requires high equipment investment costs, long material turnover cycles, and high energy consumption for production. Due to machine flow, equipment and process limitations, a single spinning position can only spin at most 8 or 12 ends. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D1/04D01D5/16D01D10/02D01D7/00
Inventor 王建辉马建平高琳李传荣李建国
Owner ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO LTD
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