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A coagulation forming method and device for producing aramid Ⅲ fiber by dry jet-wet spinning method

A technology of coagulation forming and wet spinning, which is applied in the directions of dry spinning and wet spinning to achieve the effects of increased spinning speed, simple and convenient replacement, and improved quality of fiber products

Active Publication Date: 2016-04-27
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of coagulation and forming of fibers in the coagulation bath during the process of producing aramid fiber III by dry spraying-wet spinning method, and provides a low-solid content spinning extruded fine stream to continuously and stably form primary fiber in the coagulation bath. The fiber coagulation forming method and device provide a guarantee for the further preparation of high-quality aramid Ⅲ precursor

Method used

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  • A coagulation forming method and device for producing aramid Ⅲ fiber by dry jet-wet spinning method
  • A coagulation forming method and device for producing aramid Ⅲ fiber by dry jet-wet spinning method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The thin stream of fibers extruded from the spinneret enters the coagulation liquid in the center of the coagulation plate of the coagulation device vertically, and enters the U-shaped coagulation tube after pre-coagulation to further solidify into primary fibers, and the fibers flow out from the liquid outlet of the U-shaped coagulation tube Afterwards, it is introduced into the subsequent process through the godet wheel to continue processing.

[0030] The coagulation liquid flows in from the liquid inlet 6 at the bottom of the coagulation plate edge of the coagulation device, flows into the coagulation plate after being rectified by the coagulation liquid distribution network 4 in the coagulation plate, and then flows out from the liquid outlet 7 at the center bottom of the coagulation plate into the coagulation device The U-shaped pipe 8 flows out from the U-shaped coagulation pipe liquid outlet at last.

[0031] The coagulation bath is composed of ethanol and water...

Embodiment 2

[0037] The thin stream of fibers extruded from the spinneret enters the coagulation liquid in the center of the coagulation plate of the coagulation device vertically, and enters the U-shaped coagulation tube after pre-coagulation to further solidify into primary fibers, and the fibers flow out from the liquid outlet of the U-shaped coagulation tube Afterwards, it is introduced into the subsequent process through the godet wheel to continue processing.

[0038] The coagulation liquid flows in from the liquid inlet 6 at the bottom of the coagulation plate edge of the coagulation device, flows into the coagulation plate after being rectified by the coagulation liquid distribution network 4 in the coagulation plate, and then flows out from the liquid outlet 7 at the center bottom of the coagulation plate into the coagulation device The U-shaped pipe 8 flows out from the U-shaped coagulation pipe liquid outlet at last.

[0039] The coagulation bath is composed of methanol and wate...

Embodiment 3

[0045] The thin stream of fibers extruded from the spinneret enters the coagulation liquid in the center of the coagulation plate of the coagulation device vertically, and enters the U-shaped coagulation tube after pre-coagulation to further solidify into primary fibers, and the fibers flow out from the liquid outlet of the U-shaped coagulation tube Afterwards, it is introduced into the subsequent process through the godet wheel to continue processing.

[0046] The coagulation liquid flows in from the liquid inlet 6 at the bottom of the coagulation plate edge of the coagulation device, flows into the coagulation plate after being rectified by the coagulation liquid distribution network 4 in the coagulation plate, and then flows out from the liquid outlet 7 at the center bottom of the coagulation plate into the coagulation device The U-shaped pipe 8 flows out from the U-shaped coagulation pipe liquid outlet at last.

[0047] The coagulation bath is composed of N,N-dimethylformami...

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Abstract

The invention discloses a coagulation forming method and device for producing aramid III fibers by a dry spray-wet spinning method. The fine stream of fibers extruded from a spinneret enters a coagulation bath in the center of a coagulation plate, and enters a U-shaped fiber stream after pre-coagulation. The coagulation tube is further coagulated into primary fibers, and the fibers flow out from the liquid outlet of the U-shaped coagulation tube and are introduced into the subsequent process through the godet wheel to continue processing. The coagulation bath is composed of polar organic solvent and water, the temperature of the coagulation bath is controlled at 10°C-40°C, the residence time of the fiber in the coagulation bath is 0.4s-3.6s, and the draw ratio of the fiber is 80%-300% . The coagulation forming method and device of the present invention can significantly improve the production efficiency of aramid III fiber, the spinning speed can reach 50-150m / min, and can reduce the apparent defects of the fiber and improve the quality of the fiber, so that the stability of the spinning process can be improved. And the quality of fiber products has been effectively improved.

Description

technical field [0001] The invention relates to a spinning process of aramid fiber III, more specifically, the invention relates to a solidification and forming method and device for producing aramid fiber III by a dry jet-wet spinning method, and belongs to the technical field of chemical synthetic fibers. Background technique [0002] Aramid Ⅲ is similar to Russian APMOC fiber, and its mechanical properties are better than aramid Ⅱ fiber. Aramid III fiber-reinforced composite materials are widely used in the fields of national defense, aerospace and civil high-end materials. [0003] Aramid III polymers are copolymerized by terephthaloyl dichloride, p-phenylenediamine, and 5(6)-amino-2-(4-aminophenyl)benzimidazole, and then processed by spinning Technology spinning into fibers. At present, the industrial production of aramid fiber III at home and abroad is manufactured by wet spinning technology, and the spinning speed of dry jet-wet spinning can reach 600-1200m / min, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/06D01D5/04
Inventor 彭涛王凤德刘克杰章胜宗杨文良杨杰
Owner CHINA BLUESTAR CHENGRAND CO LTD