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Dry spraying-wet spinning method for manufacturing aramid III fiber

A dry spray and fiber technology, applied in dry spinning, wet spinning, etc., can solve problems such as the inability to effectively control the flow rate of the coagulating liquid in a wide range, the short coagulation time of the fiber trickle, and the slow coagulation time of the fiber trickle. Aramid III fiber molecular chain structure, excellent fiber properties and appearance quality, the effect of optimizing polymer macromolecular structure

Active Publication Date: 2014-02-12
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two dry jet-wet spinning technologies cannot effectively control the flow rate of coagulation liquid in a wide range, and are only suitable for fiber preparation with high solid content of spinning liquid, fast spinning speed, or short coagulation time of fine fiber stream
However, aramid III has a low solid content in the spinning dope and a relatively slow solidification time for the thin stream of fibers extruded from the spinneret. If the above-mentioned similar dry jet-wet spinning technology is used, it will not be possible to achieve stable spinning. Therefore, conventional dry-wet spinning The silk method cannot be used to make aramid III fibers

Method used

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  • Dry spraying-wet spinning method for manufacturing aramid III fiber
  • Dry spraying-wet spinning method for manufacturing aramid III fiber
  • Dry spraying-wet spinning method for manufacturing aramid III fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A dry jet-wet spinning method for manufacturing aramid III fibers, the process steps are as follows:

[0041] A. The temperature of the filtered and defoamed spinning stock solution is 26°C. After being extruded through the spinneret to form a thin stream, it enters the coagulation solution through a layer of 10mm air layer;

[0042]B. The thin stream extruded from the spinneret is fully solidified in the coagulation forming device to obtain primary fibers; the coagulation forming device includes two parts: a coagulation plate and a U-shaped coagulation tube. The extruded stream is rapidly pre-solidified in the coagulation plate, and then enters the U-shaped After fully extracting the solvent in the coagulation tube, aramid III primary fibers are formed;

[0043] The coagulation bath is a mixture of methanol and water, wherein the content of methanol is 30%; the temperature of the coagulation bath is controlled at 35°C, the residence time of the fiber in the coagulation...

Embodiment 2

[0052] A dry jet-wet spinning method for manufacturing aramid III fibers, the process steps are as follows:

[0053] A. After filtering and degassing, the temperature of the spinning stock solution is 30°C. After being extruded through the spinneret to form a thin stream, it enters the coagulation solution through a layer of 15mm air layer;

[0054] B. The thin stream extruded from the spinneret is fully solidified in the coagulation forming device to obtain primary fibers; the coagulation forming device includes two parts: a coagulation plate and a U-shaped coagulation tube. The extruded stream is rapidly pre-solidified in the coagulation plate, and then enters the U-shaped After fully extracting the solvent in the coagulation tube, aramid III primary fibers are formed;

[0055] The coagulation bath is a mixed solution of N,N-dimethylacetamide and water, wherein the content of N,N-dimethylacetamide is 37%; the temperature of the coagulation bath is controlled at 30°C, and the...

Embodiment 3

[0064] A dry jet-wet spinning method for manufacturing aramid III fibers, the process steps are as follows:

[0065] A. The temperature of the filtered and defoamed spinning stock solution is 35°C, and after being extruded through the spinneret to form a thin stream, it enters the coagulation solution through a layer of 20mm air layer;

[0066] B. The thin stream extruded from the spinneret is fully solidified in the coagulation forming device to obtain primary fibers; the coagulation forming device includes two parts: a coagulation plate and a U-shaped coagulation tube. The extruded stream is rapidly pre-solidified in the coagulation plate, and then enters the U-shaped After fully extracting the solvent in the coagulation tube, aramid III primary fibers are formed;

[0067] The coagulation bath is a mixed solution of ethanol and water, wherein the content of ethanol is 50%; the temperature of the coagulation bath is controlled at 25°C, the residence time of the fiber in the c...

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Abstract

The invention discloses a dry spraying-wet spinning method for manufacturing an aramid III fiber. The method comprises the following processing steps that A, a spinning stock solution is subjected to fine filtering and defoaming, and then extruded by a spinneret plate to form trickle; the trickle passes through an air layer and then enters a coagulating bath; B, the spinneret plate extruded trickle is coagulated in a coagulating forming device by the coagulating bath; a nascent fiber is obtained; the coagulating forming device comprises a coagulating disc and a U-shaped coagulating pipe; C, a solvent and an impurity of the coagulated and formed aramid III nascent fiber are removed by a washing technology; D, the washed fiber is oiled and dried; an aramid III fiber grey yarn is obtained; and E, the aramid III fiber grey yarn is subjected to heat treatment by heat shaping equipment; and the finished fiber is obtained. According to the method, a spinning speed and the production efficiency of the aramid III fiber are increased and improved greatly, so that the production cost of the fiber is lowered effectively; the manufactured aramid III fiber has excellent fiber performance and appearance quality and high cost performance; and the strength of the aramid III fiber is higher than that of a commercially available aramid 1414 high-strength product K129.

Description

technical field [0001] The invention relates to a spinning method of aramid fiber III, more specifically, the invention relates to a spinning process for producing aramid fiber III by dry jet-wet spinning method, which belongs to the technical field of chemical synthetic fiber. Background technique [0002] Compared with traditional metal materials, high-performance fiber-reinforced resin-based composite materials have the characteristics of light weight, good performance, and corrosion resistance, and are widely used in aircraft components, armor bulletproof, individual protection, advanced motor vehicles and other applications. [0003] Aramid III is a domestic high-performance organic fiber with excellent properties of high strength, high modulus and high temperature resistance. Aramid III polymer is formed by polycondensation of three monomers: terephthaloyl chloride, p-phenylenediamine, and 5(6)-amino-2-(4-aminophenyl) benzimidazole; fiber production is It is usually m...

Claims

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Application Information

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