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Method for preparing aramid composite paper from aromatic polysulphone

A technology of composite paper and aramid sulfone fiber, which is applied in the directions of synthetic cellulose/non-cellulose material pulp/paper, paper, papermaking, etc. Density, improved paper tensile index, and regular molecular chain arrangement

Active Publication Date: 2016-12-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fiber is hydrophobic fiber, which has poor dispersion effect in water. During the dispersion process of synthetic fiber pulp, it is easy to flocculate and affect the evenness and strength of paper.

Method used

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  • Method for preparing aramid composite paper from aromatic polysulphone
  • Method for preparing aramid composite paper from aromatic polysulphone
  • Method for preparing aramid composite paper from aromatic polysulphone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The PSA chopped fiber is pretreated, and the pretreatment process is: at a molar concentration of 1.0×10 -3mol / L, temperature of 40 ℃ sodium dodecylbenzene sulfonate solution soaked for 0.5h, then washed 3 times, and finally dried in a vacuum oven at 100 ℃ to absolute dryness; weighed 1.27g pretreated absolute Dry PSA short-cut fiber, deflafe 15000r in a deflaking machine, the deflaking concentration is controlled at 0.3% by mass, then weigh 1.90g of absolute-dry meta-aramid pulp, add it into the deflapped PSA short-cut fiber solution, and deflafe again for 15000r , the deflaking concentration is controlled at 0.3% by mass, and finally 0.05% polyethylene oxide relative to the absolute dry mass of PSA chopped fibers and meta-aramid pulp fibers is added to the mixed slurry of PSA chopped fibers and meta-aramid pulp In the process, 15000r was decomposed, and the decomposed concentration was controlled at 0.3% by mass to obtain a suspension, which was injected into a paper ...

Embodiment 2

[0042] The PSA chopped fiber is pretreated, and the pretreatment process is: at a molar concentration of 3.0×10 -3 mol / L, soaked in sodium dodecylbenzenesulfonate solution at 60°C for 1 hour, then washed with water for 5 times, and finally dried in a vacuum oven at 105°C to absolute dryness; weighed 1.27g of pretreated absolute dryness PSA short-cut fiber, 25000r in the deflaking machine, the deflaking concentration is controlled at 0.3% by mass, then weigh 1.90g of absolute-dry meta-aramid pulp, add it into the PSA short-cut fiber solution after deflaking, and decompose again for 25000r, The deflaking concentration is controlled at 0.3% by mass, and finally 0.07% polyethylene oxide relative to the absolute dry mass of PSA chopped fibers and meta-aramid pulp fibers is added to the mixed slurry of PSA chopped fibers and meta-aramid pulp , disperse 25000r, and the concentration of disperse is controlled at 0.3% by mass to obtain a suspension, which is injected into a paper forme...

Embodiment 3

[0044] The PSA chopped fiber is pretreated, and the pretreatment process is: at a molar concentration of 2.0×10 -3 mol / L, temperature of 50 ℃ sodium dodecylbenzene sulfonate solution soaked for 0.75h, then washed 4 times, and finally dried in a vacuum oven at 102 ℃ to absolute dryness; weighed 1.27g pretreated absolute Dry PSA short-cut fiber, deflake 20,000r in a deflaking machine, control the debulking concentration at 0.3% by mass, then weigh 1.90g of absolute-dry meta-aramid pulp, add it into the PSA short-cut fiber solution after deflaking, and deflafe again for 20,000r , the deflaking concentration is controlled at 0.3% by mass, and finally 0.06% polyethylene oxide relative to the absolute dry mass of PSA chopped fibers and meta-aramid pulp fibers is added to the mixed slurry of PSA chopped fibers and meta-aramid pulp 20000r in the medium, and the concentration of the dispersant is controlled at 0.3% by mass to obtain a suspension, which is injected into a paper former t...

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Abstract

The invention discloses a method for preparing aramid composite paper from aromatic polysulphone. The method particularly comprises the following steps that PSA chopped fibers are pretreated; the pretreated PSA chopped fibers are subjected to first-time defibering through a defibering machine; meta-aramid pulp fibers are added for second-time defibering; a dispersing agent is added for third-time defibering, and suspension liquid is obtained; the obtained suspension liquid is injected into a paper sheet forming machine to be dewatered and formed, and after squeezing and drying treatment is conducted, the aramid composite paper raw paper is obtained; the obtained aramid composite paper raw paper is subjected to hot press molding, and the aramid composite paper is obtained. According to the preparation method of the aramid composite paper, the high-strength characteristic of the chopped fibers can be utilized to the maximum limit, and the strength performance of the meta-aramid paper is improved.

Description

technical field [0001] The invention belongs to the cross technical field of papermaking industry and material industry, and relates to a method for preparing aramid fiber composite paper by using aryl sulfone fiber. Background technique [0002] Sheet-shaped composite material made of meta-aramid (poly-m-phenylene isophthalamide) pulp fiber and meta-aramid chopped fiber as raw materials, using modern papermaking wet papermaking technology and hot pressing , is a high-performance synthetic fiber paper-based material. Because of its tough mechanical properties, good dielectric properties, ideal high temperature resistance and flexible designability, it can be used as insulating materials, electronic materials, and structural materials in special fields such as aerospace, transportation, power, and national defense. application. [0003] The localization of meta-aramid paper-based materials is still facing many difficulties, including the quality of raw materials, fiber disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/26D21H15/10D21H21/08D21H17/52
CPCD21H13/26D21H15/10D21H17/52D21H21/08
Inventor 张素风李鹏辉张美娟
Owner SHAANXI UNIV OF SCI & TECH
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