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High-speed dry-wet spinning solidification device

A dry-wet spinning, high-speed technology, applied in the field of chemical fiber spinning, can solve the problems of uneven distribution of raw solution, small effective area, and high processing accuracy requirements, improve stability and space utilization efficiency, reduce broken yarns, Effect of improving spinning stability

Active Publication Date: 2021-02-09
中蓝晨光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of linear spinneret requires high processing precision, and it is easy to have uneven distribution of the stock solution, resulting in unstable spinning; in addition, this linear spinneret has less effective area of ​​spinning holes on the plate, which is not conducive to operate

Method used

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  • High-speed dry-wet spinning solidification device
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  • High-speed dry-wet spinning solidification device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve poly-p-phenylene terephthalamide resin with a reduced viscosity of 6.3dl / g in 100% concentrated sulfuric acid at 85°C to prepare a 19.5wt% liquid crystal spinning solution, which is defoamed, filtered, and metered in sequence Finally, it is extruded from the spinneret with 0.063mm aperture, and then enters the solidification disk after passing through the air layer. The coagulation bath is 10% sulfuric acid solution, the temperature is 5°C, the spray speed of the coagulation bath is 180m / min, the distance between the converging point of the coagulation bath and the spinneret is 10mm, the spray angle of the coagulation bath (the extension line of the annular nozzle and the vertical The included angle of the direction, the same below) is 35°, and the spinning speed is 200m / min. After subsequent water washing, alkali washing, water washing, drying, oiling, and winding, the finished fibers were obtained. The mechanical properties of the fibers are shown in Table 1....

Embodiment 2

[0029] Dissolve poly-p-phenylene terephthalamide resin with a reduced viscosity of 6.3dl / g in 100% concentrated sulfuric acid at 85°C to prepare a 19.5wt% liquid crystal spinning solution, which is defoamed, filtered, and metered in sequence Finally, it is extruded from the spinneret with 0.063mm aperture, and then enters the solidification disk after passing through the air layer. The coagulation bath is 5% sulfuric acid solution, the temperature is 5°C, the spray speed of the coagulation bath is 300m / min, the distance between the converging point of the coagulation bath and the spinneret is 10mm, the spray angle of the coagulation bath (the extension line of the annular nozzle and the vertical The included angle of the direction, the same below) is 30°, and the spinning speed is 330m / min. After subsequent water washing, alkali washing, water washing, drying, oiling, and winding, the finished fibers were obtained. The mechanical properties of the fibers are shown in Table 1. ...

Embodiment 3

[0031] Dissolve poly-p-phenylene terephthalamide resin with a reduced viscosity of 6.3dl / g in 100% concentrated sulfuric acid at 85°C to prepare a 19.5wt% liquid crystal spinning solution, which is defoamed, filtered, and metered in sequence Finally, it is extruded from the spinneret with 0.063mm aperture, and then enters the solidification disk after passing through the air layer. The coagulation bath is 5% sulfuric acid solution, the temperature is 5°C, the spray speed of the coagulation bath is 500m / min, the distance between the converging point of the coagulation bath and the spinneret is 13mm, the spray angle of the coagulation bath (the extension line of the annular nozzle and the vertical The included angle of the direction, the same below) is 25°, and the spinning speed is 600m / min. After subsequent water washing, alkali washing, water washing, drying, oiling, and winding, the finished fibers were obtained. The mechanical properties of the fibers are shown in Table 1. ...

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Abstract

The invention discloses a high-speed dry-wet spinning solidification device. The high-speed dry-wet spinning solidification device comprises a funnel, a spinning tube and an annular liquid spraying system. The annular liquid spraying system comprises coagulating bath liquid, a power pump, an annular liquid tank, a liquid receiving tank, a liquid feeding tube and an annular nozzle. The funnel is arranged in the annular liquid tank, and the bottom of the funnel is connected with the spinning tube; the upper end of the annular nozzle is fixedly connected with the funnel, and an annular slit withthe width of L is formed in the lower end of the annular nozzle; the annular liquid tank is filled with the coagulating bath liquid; and the liquid receiving tank is formed below the spinning tube, and the liquid receiving tank is connected with the annular liquid tank through the liquid feeding tube and the power pump. The high-speed dry-wet spinning solidification device has the advantages thatthe spinning stability and the fiber uniformity are improved, and the fiber quality is not damaged under the condition that the spinning speed is increased.

Description

technical field [0001] The invention belongs to the technical field of chemical fiber spinning, and in particular relates to a coagulation device for high-speed dry-wet spinning. Background technique [0002] Para-aramid fiber (poly-p-phenylene terephthalamide fiber) is a special organic fiber with high strength, high modulus, high temperature resistance, wear resistance and corrosion resistance. It is widely used in Various fields such as aerospace, national defense and military industry, and civil industry. The industrial para-aramid fiber is prepared by dissolving poly-p-phenylene terephthalamide (PPTA) in concentrated sulfuric acid to form a liquid crystal solution, which is then prepared by dry-jet wet spinning. At present, in addition to paying attention to the further increase of the strength and modulus of para-aramid fiber, people also pay attention to the optimization and improvement of the spinning process, hoping to increase the output and reduce the cost by rea...

Claims

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Application Information

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IPC IPC(8): D01D5/06D01D11/00D01D13/02D01D5/04
CPCD01D5/06D01D11/00D01D13/02D01D5/04D10B2331/021
Inventor 李兰英周万立何鑫业林志娇林勇
Owner 中蓝晨光化工有限公司
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