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Meta-position aramid fiber paper with high physical strength insulativity as well as preparation method and application thereof

A technology of physical strength and insulation, applied in pulp beating method, paper, papermaking, etc., can solve the problem of improper fiber pretreatment method and blending ratio, paper surface smoothness, mechanical strength, and paper dielectric strength that cannot meet the requirements of the product And other problems, to achieve the effect of low equipment requirements, good tensile strength, good electrical insulation

Inactive Publication Date: 2013-09-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the three fibers have their own advantages, if the fiber pretreatment method and blending ratio are not appropriate, the surface smoothness, mechanical strength and dielectric strength of the paper cannot meet the requirements of the product.

Method used

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  • Meta-position aramid fiber paper with high physical strength insulativity as well as preparation method and application thereof
  • Meta-position aramid fiber paper with high physical strength insulativity as well as preparation method and application thereof
  • Meta-position aramid fiber paper with high physical strength insulativity as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) The 1313 aramid chopped fiber and the 1313 aramid precipitated fiber were subjected to composite beating treatment, the beating concentrations were 15% and 10% by mass respectively, and the dilution water during beating was selected as deionized water; the 1313 aramid The 1313 aramid precipitated fiber adopts a two-stage composite beating process, and the current is respectively 20A in the first section, 22A in the second section, and 22A in the third section; 19A in the first paragraph, 19A in the second paragraph;

[0031] The initial beating degree of the 1313 aramid chopped fiber is 8°SR, and the beating degree rises to 14°SR after compound beating; the initial beating degree of the 1313 aramid precipitated fiber is 47°SR, after the compound beating The degree of beating is increased to 53°SR; the specific surface area of ​​the 1313 aramid chopped fibers is increased by 113 times after composite beating.

[0032] (2) Use low-consistency hydraulic pulping equipm...

Embodiment 2

[0040] (1) The 1313 aramid chopped fiber and the 1313 aramid precipitated fiber were subjected to composite beating treatment, the beating concentration was 6% and 4% by mass respectively, and the dilution water during beating was selected as deionized water; the 1313 aramid The 1313 aramid precipitated fiber adopts a two-stage composite beating process, and the current is respectively 20A in the first section, 22A in the second section, and 22A in the third section; 19A in the first paragraph, 19A in the second paragraph;

[0041] The initial beating degree of the 1313 aramid chopped fiber is 8°SR, and the beating degree rises to 14°SR after compound beating; the initial beating degree of the 1313 aramid precipitated fiber is 47°SR, after the compound beating The degree of beating is increased to 53°SR; the specific surface area of ​​the 1313 aramid chopped fibers is increased by 113 times after composite beating.

[0042] (2) Use low-consistency hydraulic pulping equipment ...

Embodiment 3

[0049] (1) The 1313 aramid chopped fiber and the 1313 aramid precipitated fiber are respectively subjected to composite beating treatment, the beating concentrations are respectively 24% and 15% by mass, and the dilution water during beating is selected as deionized water; the 1313 aramid The 1313 aramid precipitated fiber adopts a two-stage composite beating process, and the current is respectively 20A in the first section, 22A in the second section, and 22A in the third section; 19A in the first paragraph, 19A in the second paragraph;

[0050] The initial beating degree of the 1313 aramid chopped fiber is 8°SR, and the beating degree rises to 14°SR after compound beating; the initial beating degree of the 1313 aramid precipitated fiber is 47°SR, after the compound beating The degree of beating is increased to 53°SR; the specific surface area of ​​the 1313 aramid chopped fibers is increased by 113 times after composite beating.

[0051] (2) Use low-consistency hydraulic pulp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention belongs to the field of special paper production, and discloses meta-position aramid fiber paper with high physical strength insulativity as well as a preparation method and application of the meta-position aramid fiber paper. According to the aramid fiber paper, by using a method of reasonably blending 1313 aramid fiber chopped fibers, 1313 aramid fiber fibrids and 1313 aramid fiber pulps, and the advantages of various kinds of fibers are combined and compared in experiment and pilot plant test processes to obtain an optimal fiber pretreatment process (a composite pulping process), a fiber blending proportion and a using amount range of the dispersing agent, so that the flocculation problem of the aramid fiber in a dispersion medium is solved, finished product paper is high in physical strength including tensile indexes and tear indexes while the paper is high in electrical insulativity and is good in bulk degree; and therefore, the paper can be used in the fields of electrical insulation, cellular materials, communication and transportation and the like.

Description

technical field [0001] The invention belongs to the field of special paper production, and in particular relates to a high physical strength insulating meta-aramid paper and its preparation method and application. Background technique [0002] Meta-aramid paper, also known as poly-meta-aramid paper, is a special paper made of pure meta-aramid (poly-meta-phenylene diammonium isophthalamide) fibers, which has high strength, low deformation, and High temperature, chemical corrosion resistance, flame retardant and excellent electrical insulation properties, widely used in aerospace, transportation, national defense industry and electrical insulation and other fields, is a high-tech new material related to national security. [0003] Due to different preparation processes, meta-aramid fibers are further divided into chopped fibers, precipitated fibers and pulp. Chopped fiber is a product obtained by simply cutting fibrils. The physical strength of paper mainly comes from aramid ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/26D21D1/02D21H21/08
Inventor 杨仁党李龙杨飞刘德桃
Owner SOUTH CHINA UNIV OF TECH
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