Preparation method of polyester meta-position aramid fiber composite paper

A composite paper and aramid fiber technology, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, paper, papermaking, etc., can solve the problems of poor mechanical strength performance of aramid paper, parchment, poor paper insulation performance, etc. Achieve the effects of smaller and less voids, increased paper crystallinity, and improved strength properties

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

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Problems solved by technology

The formed meta-aramid paper has poor mechanical strength, and the parchment phenomenon is serious, and the insulation performance of the paper is poor

Method used

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  • Preparation method of polyester meta-position aramid fiber composite paper
  • Preparation method of polyester meta-position aramid fiber composite paper
  • Preparation method of polyester meta-position aramid fiber composite paper

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preparation example Construction

[0028] A kind of preparation method of polyester meta-aramid composite paper of the present invention, specifically comprises the following steps:

[0029] Step 1, pretreating PET chopped fibers;

[0030] The pretreatment process of PET chopped fibers is: make PET chopped fibers at a molar concentration of 1.0×10 -3 mol / L~3×10 -3 mol / L, soak in sodium dodecylbenzenesulfonate solution at 40°C-60°C for 0.5h-1h, then wash with water for 3-5 times, and finally dry in a vacuum drying oven at 100°C-105°C until absolutely dry .

[0031] In step 2, the PET chopped fibers pretreated in step 1 are decomposed for the first time with a deflagging machine; then meta-aramid pulp fibers are added for the second decompression; finally, the dispersant is added for the third time Dissolved to obtain a suspension;

[0032] The mass ratio of PET chopped fibers to meta-aramid pulp fibers is 4:6, the dispersant is polyethylene oxide, and the amount added is 0.05% relative to the absolute dry ma...

Embodiment 1

[0041] The PET chopped fiber is pretreated, and the pretreatment process is as follows: 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 PET short-cut fiber, deflate 15000r in the deflagging machine, and the debonding concentration is controlled at 0.3% by mass, then add 1.90g of absolute dry meta-aramid pulp fiber for deflapping, decompose 15000r, and the debonding concentration is controlled at 0.3% by mass, Finally, add 0.05% polyoxyethylene solution relative to the absolute dry weight of PET chopped fibers and meta-aramid pulp fibers to decompose, decompose for 15000r, and control the deconcentration at 0.3% by mass to obtain a suspension. Inject the liquid into the paper former, and prepare a quantitatively 100g / m 2 The aramid paper wet sheet is then pressed by a hydraulic mach...

Embodiment 2

[0043] The PET chopped fiber is pretreated, and the pretreatment process is: at a molar concentration of 3.0×10 -3 mol / L, temperature of 60 ℃ sodium dodecylbenzene sulfonate solution soaked for 1.5h, then washed 5 times, and finally dried in a vacuum oven at 100 ℃ to absolute dryness; weighed 1.27g pretreated absolute Dry PET short-cut fiber, deflate 25000r in the deflagging machine, and the debonding concentration is controlled at 0.3% by mass, then add 1.90g of absolute dry meta-aramid pulp fiber for deflapping, decompose 25000r, and the debonding concentration is controlled at 0.3% by mass, Finally, add 0.07% polyoxyethylene solution relative to the absolute dry weight of PET chopped fibers and meta-aramid pulp fibers to decompose, decompose for 25000r, and control the deconcentration concentration at 0.3% by mass to obtain a suspension. Inject the liquid into the paper former, and prepare a quantitatively 100g / m 2 The aramid paper wet sheet is then pressed by a hydraulic ...

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Abstract

The invention discloses a preparation method of polyester meta-position aramid fiber composite paper. The method comprises the following steps: pretreating PET (polyethylene terephthalate) chopped fibers; carrying out primary fluffing on the pretreated PET chopped fibers by using a fluffer; adding meta-position aramid fiber pulp fibers, and carrying out secondary fluffing; finally adding a dispersing agent, and carrying out tertiary fluffing to obtain a suspension; injecting the suspension into a paper former, and carrying out dewatering forming, pressing and drying to obtain polyester meta-position aramid fiber composite paper base paper; injecting the suspension into a paper former, carrying out dewatering forming, pressing, and drying to obtain aramid fiber electric-insulation paper base paper; and carrying out hot pressing on the obtained polyester meta-position aramid fiber composite paper base paper. The preparation method can maximally utilize the chopped fibers with high strength and polyester fibers with lower softening temperature as binding fibers, thereby enhancing the strength property and insulating property of the meta-position aramid fiber paper.

Description

technical field [0001] The invention belongs to the cross technical field of papermaking industry and material industry, and relates to a preparation method of polyester meta-aramid composite paper. 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] At present, the localization of meta-aramid paper-based materials is still facing many difficulties, including the quality of raw materials, fiber dispersion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/24D21H13/26D21H15/02D21H15/10D21H21/08D21H17/52
CPCD21H13/24D21H13/26D21H15/02D21H15/10D21H17/52D21H21/08
Inventor 张素风李鹏辉刘媛
Owner SHAANXI UNIV OF SCI & TECH
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