Multiple proportional layered composite manufactured amide paper of aramid fiber

A kind of aramid paper, multi-proportion technology, applied in the direction of papermaking, paper machine, layered products, etc., can solve the problems of poor mechanical properties, low elongation at break, high degree of molecular structure symmetry and orientation, and achieve the state of interface bonding Good, smooth and homogeneous results

Inactive Publication Date: 2007-07-25
SHAANXI UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Para-aramid paper products have good dimensional stability and insulation performance under high temperature and high humidity conditions, and are suitable for the preparation of printed circuit board substrates. However, due to the low elongation at break of para-aramid and its molecular Structural symmetry and orientation are high, and the mechanical properties of paper are poor, which affects the use of aramid paper

Method used

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  • Multiple proportional layered composite manufactured amide paper of aramid fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, at first with aramid fibril and length is 8mm, the aramid chopped fiber that fineness is 7 deniers namely polym-phenylene isophthalamide fiber is respectively dispersed in water and loosened into slurry, made Mass concentration is 1% aramid fibrid slurry and mass concentration is 8% aramid fibrid slurry; then by mass percentage, 30% aramid fibrid slurry and 70% chopped fiber The slurry is mixed, and the core layer 2 is formed on the Internet by the common papermaking method; then 40% of the aramid precipitated fiber slurry and 60% of the chopped fiber slurry are mixed according to the mass percentage, and the ordinary papermaking method is used on the Internet. Surface layer 1 and bottom layer 3 are formed; the formed core layer 2, surface layer 1 and bottom layer 3 are compounded from top to bottom according to the order of surface layer 1, core layer 2 and bottom layer 3 respectively, wherein Surface layer 1 and bottom layer 3 account for 67% of the weig...

Embodiment 2

[0021] Embodiment 2, at first aramid fibrid and length are 12mm, and fineness is the aramid short-cut fiber of 3 deniers, namely polym-phenylene isophthalamide fiber, is respectively dispersed in water and loosened into slurry, and made Mass concentration is that 1.3% aramid fibrid slurry and mass concentration are 6% aramid fibrid pulp; then by mass percentage, 45% aramid fibrid pulp and 55% chopped fiber The slurry is mixed, and the core layer 2 is formed on the Internet by the ordinary papermaking method; then 60% of the aramid precipitated fiber slurry and 40% of the chopped fiber slurry are mixed according to the mass percentage, and the ordinary papermaking method is used on the Internet. Surface layer 1 and bottom layer 3 are formed; the formed core layer 2, surface layer 1 and bottom layer 3 are compounded from top to bottom according to the order of surface layer 1, core layer 2 and bottom layer 3 respectively, wherein The surface layer 1 and the bottom layer 3 accoun...

Embodiment 3

[0022] Embodiment 3, at first with aramid fibril and length is 4mm, the aramid chopped fiber that fineness is 10 deniers namely polym-phenylene isophthalamide fiber is respectively dispersed in water and loosened into slurry, made Mass concentration is that 1.2% aramid fiber fibrid slurry and mass concentration are 2% aramid fibrid fiber slurry; then by mass percentage, 20% aramid fibrid fiber slurry and 80% chopped fiber The slurry is mixed, and the core layer 2 is formed on the Internet by the common papermaking method; then 50% of the aramid precipitated fiber slurry and 50% of the chopped fiber slurry are mixed according to the mass percentage, and the ordinary papermaking method is used on the Internet Surface layer 1 and bottom layer 3 are formed; the formed core layer 2, surface layer 1 and bottom layer 3 are compounded from top to bottom according to the order of surface layer 1, core layer 2 and bottom layer 3 respectively, wherein Surface layer 1 and bottom layer 3 a...

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Abstract

The present invention relates to a kind of multiproportion stratified compound-made aramid fiber amide paper and its preparation method. Said method includes the following several steps: in the water making aramid fiber fibrids and short-cut fibers required for face layer, bottom layer and core layer be respectively dispersed and decomposed into pulp materials; making the aramid fiber short-cut fibers and fibrids pulp materials required for core layer, face layer and bottom layer be respectively mixed; utilizing general papermaking process to make wire formation; from-top-to-bottom successively compounding wet paper webs according to the order of face layer, core layer and bottom layer respectively; pressing and drying; high-temperature calendaring and forming.

Description

technical field [0001] The invention relates to meta-aramid fiber papermaking technology, belongs to the technical field of special synthetic fiber paper manufacturing, and in particular relates to a multi-ratio layered compound papermaking aramid fiber amide paper and a preparation method thereof. Background technique [0002] Aramid paper is a kind of high-temperature-resistant synthetic fiber paper. It is usually mixed with polyaramid chopped fibers and fibrids on a paper machine to make paper, and then made into aramid paper after hot pressing. Because of its excellent mechanical properties, insulation properties, temperature resistance, chemical resistance, etc., and light weight, it can be used as sheet insulation materials, heat insulation materials, packaging materials, honeycomb materials, filter materials for structural materials, motors, etc. It is widely used in aerospace, electronics, transportation and other industries. It can also be used as a laminate reinfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/30B32B29/00D21H13/26D21H15/10D21G1/00
Inventor 张素风张美云
Owner SHAANXI UNIV OF SCI & TECH
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