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Preparation method of high-tensile high-model heterocycle aramid fiber

A high-modulus heterocyclic aramid fiber and high-strength technology, which is applied in the direction of spinning solution preparation, wet spinning method, single-component copolyamide artificial filament, etc., to achieve the effect of high pass rate and less surface wool

Active Publication Date: 2011-09-28
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the synthesis of aramid III polymers, patent CN1480479 has been introduced, and patent CN1473969 has described the continuous heat treatment method of aramid III raw filament bundles, and clarified that aramid III fibers are different from Apmoc fibers in heat treatment methods, but There is no patent or literature related to the whole production method of aramid III fiber from polymerization to spinning

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of high-strength and high-modulus heterocyclic aramid fibers:

[0024] A, a total of 74.8 grams of 2-(4-aminophenyl)-5-aminobenzimidazole and p-phenylenediamine in a molar ratio of 2.33: 1 are added to 3.5% dichloride containing 3000 grams of lithium chloride. In the reaction kettle of the methylacetamide solution, after stirring for 1.5 hours under the protection of nitrogen, the temperature in the kettle was lowered to 5°C, and then a total of 80.3 grams of terephthaloyl chloride was added in 4 batches, with an interval of 55 minutes between batches, and all additions were completed. Stirring was continued for 60 minutes to obtain a polymer solution with a polymer solid content of 4.0% and a dynamic viscosity of 85,000 centipoise.

[0025] B. After degassing and filtering the above polymer solution under normal pressure, carry out wet spinning. The spinneret is 330*0.08mm (330 holes, single hole diameter 0.08mm), and the polymerization solution is sprayed ...

Embodiment 2

[0027] Preparation of high-strength and high-modulus heterocyclic aramid fibers:

[0028] A, a total of 49.5 grams of 2-(4-aminophenyl)-5-aminobenzimidazole and p-phenylenediamine in a molar ratio of 2:1 are added to 3.5% dichloride containing 2000 grams of lithium chloride. In the reaction kettle of the methylacetamide solution, after stirring for 2 hours under the protection of nitrogen, the temperature in the kettle was lowered to 8°C, and then a total of 54.17 grams of terephthaloyl chloride was added in 4 batches, and the interval between batches was 45 minutes. Stirring was continued for 60 minutes to obtain a polymer solution with a polymer solid content of 4.0% and a dynamic viscosity of 90,000 centipoise.

[0029] B. After degassing and filtering the above polymer solution under normal pressure, perform wet spinning. The spinneret is 400*0.07mm, and the polymer solution is sprayed into dimethylacetamide at 20°C with a mass fraction of 50 through the spinneret. % of d...

Embodiment 3

[0031] Preparation of high-strength and high-modulus heterocyclic aramid fibers:

[0032] A, a total of 49.5 grams of 2-(4-aminophenyl)-5-aminobenzimidazole and p-phenylenediamine in a molar ratio of 2:1 are added to 4.0% dichloride containing 2000 grams of lithium chloride. In the reaction kettle of the methylacetamide solution, after stirring for 2 hours under the protection of nitrogen, the temperature in the kettle was lowered to 8°C, and then a total of 53.78 grams of terephthaloyl chloride was added in 3 batches, with an interval of 60 minutes between batches, and all additions were completed. Stirring was continued for 50 minutes to obtain a polymer solution with a polymer solid content of 4.0% and a dynamic viscosity of 80,000 centipoise.

[0033] B. After degassing and filtering the above polymer solution under normal pressure, carry out wet spinning. The spinneret should be 330*0.08mm, and the polymer solution should be sprayed into dimethylacetamide at 20°C with a m...

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PUM

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Abstract

The invention relates to a preparation method of a high-tensile high-model heterocycle aramid fiber, which comprises an integrated production method from polymerization, spinning to post-process. By optimizing the molar ratio of two diamine monomers, the invention prepares heterocycle polyamide solution polymer of which the diamine proportional distribution is narrower, the polymer solid content is 2-8%, and the dynamic viscosity is 5-3 million centipoise; and the heterocycle polyamide solution is subjected to deaeration, filtration and wet spinning, and can prepare the high-tensile high-model heterocycle aramid fiber with narrower diamine proportional distribution through spinning process control, wherein the breaking strength is 27-33cN / dtex, the modulus of elasticity is 950-1,200cN / dtex, and the elongation at break is 2.5-3.8%.

Description

technical field [0001] The invention relates to a method for preparing an aramid fiber, more specifically, the invention relates to a method for preparing a high-strength and high-modulus heterocyclic aramid fiber, which belongs to the technical field of special synthetic fiber preparation. Background technique [0002] Heterocyclic aramid is a modified aromatic polyamide fiber whose main chain is composed of aromatic rings and heterocyclic rings. It uses ternary copolymerization and adopts the method of adding a third monomer to introduce heterocyclic rings into the polymer main chain. Thereby reducing the regularity of the polymer chain, reducing the degree of crystallinity, while being able to form extremely strong intermolecular hydrogen bonds. Practice has shown that heterocyclic aramid fibers have more prominent heat resistance and higher mechanical properties than pure aramid fibers (no heterocycles) such as Kevlar and Twaron. Such as Russian Apmoc fiber is a kind of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/80D01D1/02D01D1/10D01D5/06C08G69/32D06M13/395D06M13/11D06M101/36
Inventor 王凤德彭涛陈超峰邱锋
Owner CHINA BLUESTAR CHENGRAND CO LTD
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