Water cooling method in polyester fiber melt-spinning

A polyester fiber and melt spinning technology, which is applied in the water cooling field of polyester fiber melt spinning, can solve the problems of poor cooling effect, low breaking strength, and uneven denier, so as to avoid swinging, good product quality, Uniform denier effect

Inactive Publication Date: 2004-11-10
黄忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a water cooling method in polyester fiber melt spinning to solve the current problems of uneven fineness, low breaking strength and poor cooling effect due to side blowing cooling and forming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Take the production of 5.5 dtex / 24 single-group polyester fibers as an example

[0008] An ultrasonic atomizing generator is installed at the air inlet of the original side blowing. The ultrasonic atomizing generator generates water mist or water foam with a temperature of 70 ° C and a diameter of 1 to 5 microns. After the zone enters the deformation zone, the water mist and water foam are blown into the spinning window with a breeze with a wind speed of 0.05 m / s, and the water mist and water foam fill the spinning window from top to bottom to cool the silk and produce The water droplets and excess water are collected through the water collector.

Embodiment 2

[0010] Take the production of 165 dtex / 96 single-group polyester fibers as an example

[0011] An ultrasonic atomizing generator is installed at the air inlet of the original side blowing. The ultrasonic atomizing generator generates water mist or water foam with a temperature of 30 ° C and a diameter of 1 to 5 microns. After the deformation zone enters the deformation zone, the water mist and water foam are blown into the spinning window with a breeze with a wind speed of 0.08 m / s, and the water mist and water foam fill the spinning window from top to bottom to cool the silk and produce The water droplets and excess water are collected through the water collector.

Embodiment 3

[0013] Take the production of 1650 dtex / 180 single group polyester fibers as an example

[0014] A centrifuge is installed at the air inlet of the original side blowing. The centrifuge produces water foam and water bubbles at a temperature of 20°C. Breeze blows the water foam and water bubbles into the spinning window, and the water foam and water bubbles fill the spinning window from top to bottom to cool the silk, and the water droplets and excess water generated after heat exchange are collected by the water collector.

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PUM

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Abstract

The invention relates to a water cooling method in polyester fiber melt spinning, additionally installing spray generator at the air intake of the original side blower or around the spinning window, and able to generate water spray, water foam, and water bubble or water film according to the needs; the melt streamlet extruded from spinning components passes through swelling area into deformation area, then blows the water spray, water foam, and water bubble or water film in the spinning window by a breeze at a speed of 0.05-0.1 m/s to make them fill up the whole window to cool threads, and after heat exchange, the produced water drops and surplus water are collected by water collector. Its advantage: accelerating cooling, reducing skin-core structure of threads and avoiding swing of threads caused by wind cooling. It makes fiber size uniform, breaking tenacity high and product quality good.

Description

technical field [0001] The invention belongs to a cooling method in the process of producing polyester fibers in the chemical fiber industry. Background technique [0002] In current melt spinning production, polyester chips are heated by a screw extruder to produce a high temperature and high pressure spinning polymer melt. The melt is extruded from the spinneret holes of the spinneret of the spinning assembly to produce semi-melted fiber filaments, which need to be cooled by side blowing to form. The current side blowing cooling adopts unidirectional blowing or circular blowing , cooling and forming the extruded, high-temperature, semi-melted chemical filaments. Its disadvantages are: due to the low heat ratio of the air, the cooling speed is slow, and the silk is prone to produce a skin-core structure, and the swing of the thread is caused by the blowing of the wind, which makes the CV value of the fineness larger and the breaking strength is not high. Poor quality is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/088
Inventor 黄忠
Owner 黄忠
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