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Industrial production method for para-aramid fiber filaments with high elongation

A para-aramid fiber, industrial production technology, applied in the field of aramid fiber and its preparation, can solve problems such as unsolved aramid filament

Inactive Publication Date: 2017-03-29
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fiber product obtained by the method of this invention has high crystallinity luster, bright color, less fuzz, and also has excellent long yarn strength and intermediate modulus, but it does not solve the problem of high elongation at break. Demand for para-aramid filament

Method used

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  • Industrial production method for para-aramid fiber filaments with high elongation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The spinning step of the present invention is as follows:

[0017] Add the poly(p-phenylene terephthalamide) polymer with an intrinsic viscosity of 7.5-8.5dL / g into sulfuric acid with a concentration of 98%-105% and mix evenly. After stirring, the temperature is controlled at 70-90°C to prepare The weight percentage of poly-p-phenylene terephthalamide is a mixed solution of 18.5%-21%; the prepared poly-p-phenylene terephthalamide mixed solution is extruded into a twin-screw extruder, The further dissolution of poly-p-phenylene terephthalamide in concentrated sulfuric acid is completed in the extruder, and the retention time is extended to 2-6 hours compared with the conventional variety process, and it is vacuum degassed for 2-4 hours; The screw extruder extrudes the spinning solution that is fully mixed, the temperature is well adjusted, and the air bubbles are completely removed. After being filtered by the metering pump, it is sent to the spinneret. The spinning solu...

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Abstract

The invention discloses an industrial production method for para-aramid fiber filaments with high elongation. PPTA, with logarithmic viscosity being 7.5-8.5 dL / g, which is obtained through a low-temperature solution polycondensation method is adopted as a starting point, and the para-aramid fiber filaments, suitable for industrial production, with the high breakage elongation are prepared through a dry-jet wet spinning method. The detailed indexes of the aramid fiber filaments include that the elongation is larger than or equal to 4.0%, and the logarithmic viscosity is 4.0-5.0 dL / g.

Description

technical field [0001] The invention relates to the field of aramid fiber and its preparation method, in particular to a polyparaphenylene terephthalamide (PPTA) polymer with a logarithmic viscosity of 7.5-8.5dL / g as a raw material, and adopts dry spray wet An industrial production method for obtaining high-elongation para-aramid filaments through spinning process. Background technique [0002] Para-aramid has excellent physical properties such as high strength, high modulus, and high temperature stability. At the same time, it also has appropriate toughness for textile processing. Therefore, para-aramid has attracted widespread attention from all over the world. It is a rare high-quality material in the field. For civilian use, it can be used for optical cable communication, aircraft tires, and paper industry. In recent years, with the rapid development of science and technology, the use of para-aramid has been continuously expanded, while the domestic para-aramid market i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60D01D1/10D01D5/06D01D10/06
CPCD01F6/605D01D1/10D01D5/06D01D10/06
Inventor 唐凯陈文建孙德卫于宏广刘书杰
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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