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Preparation method of aromatic polyamide insulation paper

A technology of aromatic polyamide and insulating paper, which is applied in the direction of special paper, insulators, organic insulators, etc., can solve problems such as product performance defects, application field limitations, unevenness, etc., and achieve lower equipment requirements, performance improvements, and increased poles. sexual effect

Pending Publication Date: 2021-02-09
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing insulating materials based on sulfonamide fiber, problems of agglomeration and unevenness in the fiber dispersion process are prone to occur, so the performance of the prepared product will have defects, and the application field is also limited

Method used

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  • Preparation method of aromatic polyamide insulation paper
  • Preparation method of aromatic polyamide insulation paper
  • Preparation method of aromatic polyamide insulation paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of aromatic polyamide insulating paper:

[0031] After weighing the sulfonamide precipitated fiber and the heterocyclic aramid chopped fiber according to the ratio of 2:8, put them into the blending tank for mixing, and mix them with clean water to make a mixed solution with a mass concentration of 1‰, and then perform a high-speed hydraulic pulping Stir in the machine for 20min. The upper three layers of inclined wire are formed to obtain wet paper, and then dehydrated by pressing and dehydrating at a roller axis pressure of 2kg / cm, then dried at 105°C, and finally dried at a roller temperature of 220°C and a line pressure of 3kg / cm Carry out calendering to obtain finished insulating paper. The performance test results of the finished paper are shown in Table 1. The molecular structural formula of heterocyclic aramid chopped fibers is as follows: figure 1 As shown, what is selected here is the mixture under its different degrees of polymerizatio...

Embodiment 2

[0036] A preparation method of aromatic polyamide insulating paper:

[0037] Weigh the sulfonamide precipitated fiber and the heterocyclic aramid chopped fiber according to the ratio of 4:6, mix them in the blending tank, mix them with clean water to make a mixed solution with a mass concentration of 1‰, and then grind them in high-speed hydraulic pulping Stir in the machine for 20min. The upper three layers of inclined wire are formed to obtain wet paper, and then dehydrated by pressing and dehydrating at a roller axis pressure of 2kg / cm, then dried at 105°C, and finally dried at a roller temperature of 220°C and a line pressure of 3kg / cm Carry out calendering to obtain finished insulating paper. The performance test results of the finished paper are shown in Table 2. The molecular structural formula of heterocyclic aramid chopped fibers is as follows: figure 1 As shown, what is selected here is the mixture under its different degrees of polymerization.

[0038] Table 2 P...

Embodiment 3

[0041] A preparation method of aromatic polyamide insulating paper:

[0042] After weighing the sulfonamide precipitated fiber and the heterocyclic aramid chopped fiber according to the ratio of 5:5, they are mixed in the blending tank, and mixed with clean water to form a mixed solution with a mass concentration of 1‰, and then crushed in high-speed hydraulic pulping. Stir in the machine for 20min. The upper three layers of inclined wire are formed to obtain wet paper, and then dehydrated by pressing and dehydrating at a roller axis pressure of 2kg / cm, then dried at 105°C, and finally dried at a roller temperature of 220°C and a line pressure of 3kg / cm Carry out calendering to obtain finished insulating paper. The performance test results of the finished paper are shown in Table 3. The molecular structural formula of heterocyclic aramid chopped fibers is as follows: figure 1 As shown, what is selected here is the mixture under its different degrees of polymerization.

[0...

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Abstract

In order to solve the problems of easy agglomeration and non-uniformity in a fiber dispersion process in the process of preparing an insulating material based on polysulfonamide fibers, the inventionprovides a preparation method of aromatic polyamide insulation paper. The preparation method comprises the steps of (1) proportionally mixing polysulfonamide precipitation fibers and aramid chopped fibers, pulping and defibering to obtain mixed pulp; (2) carrying out wet papermaking treatment on the mixed pulp to obtain wet paper; and (3) carrying out squeezing dehydration, drying and high-temperature calendaring treatment on the wet paper to obtain the finished insulation paper. By introducing the heterocyclic aramid chopped fibers, the polarity of the fibers is increased, the problems of easy agglomeration and non-uniformity in the fiber dispersion process are solved, the dispersion time is saved, the performance of the insulation paper is improved, and the application field of the insulation paper is expanded.

Description

technical field [0001] The invention relates to a preparation method of an aromatic polyamide insulating material, which belongs to the technical field of polymer materials. Background technique [0002] With the popularization and use of various electrical appliances in the world, the demand for insulating materials required in electrical manufacturing has also increased sharply. Due to its excellent thermal stability, flame resistance, electrical insulation, aging resistance, and Radiation, acid and alkali resistance, it is widely used as high temperature resistant insulating material in motors, corona machines, transformers, cables and other fields that require high temperature resistant insulation. Chinese patent CN201010256037.2 discloses a method for manufacturing polysulfone fiber insulating paper. The invention includes the preparation of polysulfone fiber precipitated fiber pulp and the preparation of long fiber pulp. The sulfonamide insulating paper is made throug...

Claims

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Application Information

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IPC IPC(8): D21H13/26D21H13/20D21H27/12D21F11/00
CPCD21F11/00D21H13/20D21H13/26D21H27/00
Inventor 杨军袁锋曹凯凯杨佑宋志成李忠良伍威易勇刘含茂
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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