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Preparation method of aramid fiber paper coated with aramid fiber spinning solution

A technology of spinning stock solution and aramid paper, which is applied in the direction of special paper, textiles, papermaking, coating, etc., can solve the problems of complex preparation process of aramid nanofibers, unfavorable industrial production, secondary pollution, etc., and achieve the reduction of electronic wear. The effect of crossing the path, easy recycling and improving the dielectric strength

Active Publication Date: 2021-12-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of aramid nanofibers is relatively complicated and the cost is relatively high, and the preparation process will also produce secondary pollution, which is not conducive to industrial production

Method used

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  • Preparation method of aramid fiber paper coated with aramid fiber spinning solution
  • Preparation method of aramid fiber paper coated with aramid fiber spinning solution

Examples

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preparation example Construction

[0025] A preparation method for coating aramid paper with aramid spinning stock solution, comprising the following steps:

[0026] (1) Preparation of aramid paper: wash the meta-aramid chopped fibers required for the experiment in a sodium dodecylbenzenesulfonate (LAS) solution, and control the concentration of the LAS solution at 1.2×10 -3 mol / L, the washing water temperature is 60°C, soak the meta-chopped fibers, stir and wash them for about 30 minutes, finally rinse them with clean water, remove them, shred them and dry them for later use. After adding 2 / 3 of water into the fiber deflagging machine, take a certain amount of meta-aramid precipitated fiber and meta-aramid chopped fiber into it respectively, and the absolute dry mass ratio of the two is (2~4) :1. Add polyethylene oxide (PEO) solution (mass concentration: 0.05%) as a dispersant in an amount of 0.5% relative to the absolute dry meta-aramid chopped fibers, and decompose 20000r in a decomposer to obtain a slurry ...

Embodiment 1

[0038] A preparation method for coating aramid paper with aramid spinning stock solution, comprising the following steps:

[0039] (1) Preparation of aramid paper: wash meta-aramid chopped fibers in sodium dodecylbenzenesulfonate (LAS) solution, and control the concentration of LAS at 1.2×10 -3 mol / L, the washing water temperature is 60°C, soak the meta-chopped fibers, stir and wash them for about 30 minutes, finally rinse them with clean water, remove them, shred them and dry them for later use. After adding 2 / 3 of water into the fiber deflagging machine, take a certain amount of meta-aramid precipitated fiber and meta-aramid chopped fiber into it respectively, the absolute dry mass ratio of the two is 2:1, add Polyethylene oxide (PEO) solution (mass concentration: 0.05%) is used as a dispersant, and the addition amount is 0.5% relative to the absolute dry meta-aramid short-cut fiber, and it is decomposed in a decomposer for 20000r to obtain a slurry dispersion. Then the slu...

Embodiment 2

[0044] A preparation method for coating aramid paper with aramid spinning stock solution, comprising the following steps:

[0045] (1) Preparation of aramid paper: wash meta-aramid chopped fibers in sodium dodecylbenzenesulfonate (LAS) solution, and control the concentration of LAS at 1.2×10 -3 mol / L, the washing water temperature is 60°C, soak the meta-chopped fibers, stir and wash them for about 30 minutes, finally rinse them with clean water, remove them, shred them and dry them for later use. After adding 2 / 3 of water into the fiber deflagging machine, take a certain amount of meta-aramid precipitated fiber and meta-aramid chopped fiber into it respectively, the absolute dry mass ratio of the two is 2:1, add Polyethylene oxide (PEO) solution (mass concentration: 0.05%) is used as a dispersant, and the addition amount is 0.5% relative to the absolute dry meta-aramid short-cut fiber, and it is decomposed in a decomposer for 20000r to obtain a slurry dispersion. Then the slu...

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Abstract

The invention discloses a preparation method of aramid fiber paper coated with an aramid fiber spinning solution, which comprises the following steps: respectively defibering and dispersing meta-aramid chopped fibers and meta-aramid fibrids, defibering and mixing the components to obtain a slurry dispersion liquid, homogenizing the slurry dispersion liquid, and filtering, dehydrating, forming, squeezing and drying the liquid to obtain meta-aramid fiber base paper; then dissolving m-phenylenediamine in an N,N-dimethylacetamide solvent, adding isophthaloyl dichloride under stirring, and carrying out condensation polymerization under a low-temperature condition; and then adding oxychloride generated by an alkali neutralization reaction, and carrying out concentration adjustment and uniform stirring so as to obtain a meta-aramid spinning coating solution; finally, uniformly coating two surfaces of meta-aramid base paper with the prepared meta-aramid spinning coating liquid, and drying the base paper at high temperature to obtain the coated aramid paper.

Description

technical field [0001] The invention relates to a polymer aramid fiber material and papermaking coating technology, in particular to a method for preparing aramid paper coated with aramid spinning stock solution. Background technique [0002] Due to its excellent mechanical strength, flexibility, high temperature resistance, flame retardancy, insulation and corona resistance, aramid products are widely used as high-end insulating materials in high-voltage, frequency conversion motors and rail transit traction motors. With the advancement of science and technology, the upgrading of machines has put forward higher performance requirements for aramid products. For example, the speed of high-speed rail is gradually increasing, which poses new challenges to the performance of insulating paper or cardboard in high-voltage variable-frequency motors for high-speed rail and traffic traction motors. Insulation material with greater breakdown strength and stronger corona resistance to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H13/26D21H15/02D21H19/14D21H19/30D21H19/84
CPCD21H27/00D21H13/26D21H15/02D21H19/14D21H19/30D21H19/84
Inventor 张美云李金宝张慧白韵鈜谭鑫
Owner SHAANXI UNIV OF SCI & TECH
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