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Composite plant fiber aramid paper and preparation method thereof

A plant fiber and composite paper technology is applied in the field of papermaking industry, which can solve the problems of complex preparation process of modified aramid paper and expensive raw materials of modified aramid paper, and achieve the effects of reducing production cost, wide source and cost reduction.

Active Publication Date: 2016-06-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of plant fiber aramid composite paper, which solves the problem of expensive raw materials of existing modified aramid paper
[0006] Another object of the present invention is to provide a method for preparing the above-mentioned plant fiber aramid composite paper, which solves the problem that the preparation process of the existing modified aramid paper is complicated

Method used

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Examples

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Effect test

preparation example Construction

[0029] A kind of preparation method of plant fiber aramid composite paper of the present invention, specifically implement according to the following steps:

[0030] Step 1. Weigh aramid fiber A and aramid fiber B respectively according to the weight ratio of 3:7 or 3.5:6.5 or 4:6 or 4.5:5.5 or 5:5, and aramid fiber A is meta-aramid chopped fiber 1. One of para-aramid chopped fibers, aramid fiber B is at least one of para-aramid fibrids, para-aramid pulp fibers and meta-aramid fibrids;

[0031] Step 2. The aramid fiber A weighed in step 1 is treated with phosphoric acid with a mass concentration of 10% to 40%, and then washed to neutrality, wherein the phosphoric acid treatment temperature is 40-60°C, and the treatment time is 3-5h; 0.1% to 1.0% of the mass of fiber A is polyoxyethylene decomposed to make slurry suspension A;

[0032] Step 3. The plant fiber is modified with NaOH solution with a mass concentration of 5% to 30%. The modification temperature of NaOH solution is...

Embodiment 1

[0039] Step 1. Weigh aramid fiber A and aramid fiber B respectively according to a weight ratio of 3:7, aramid fiber A is meta-aramid chopped fiber, and aramid fiber B is para-aramid precipitated fiber;

[0040] Step 2. The aramid fiber A weighed in step 1 is treated with phosphoric acid with a mass concentration of 10% and then washed to neutrality, wherein the phosphoric acid treatment temperature is 40° C., and the treatment time is 3 hours; Polyethylene oxide is decomposed to make slurry suspension A;

[0041]Step 3. Modify the plant fiber with NaOH solution with a mass concentration of 5%. The NaOH solution modification temperature is 40°C, and the modification time is 2h. Then, it is washed with clean water and subjected to beating process. The beating degree is 35°SR to make a slurry Suspension B, wherein the plant fiber is coniferous wood;

[0042] Step 4, beating the aramid fiber B weighed in step 1 and dissolving and dispersing, beating to make a slurry suspension C...

Embodiment 2

[0046] Step 1. Weigh aramid fiber A and aramid fiber B respectively according to a weight ratio of 3.5:6.5, aramid fiber A is para-aramid chopped fiber, and aramid fiber B is para-aramid pulp fiber;

[0047] Step 2. The aramid fiber A weighed in step 1 is treated with phosphoric acid with a mass concentration of 20% and then washed to neutrality, wherein the phosphoric acid treatment temperature is 45° C., and the treatment time is 3.5 hours; then use 0.2% of the aramid fiber A mass Polyethylene oxide is decomposed to make slurry suspension A;

[0048] Step 3, the plant fiber is modified with a NaOH solution with a mass concentration of 10%, the modification temperature of the NaOH solution is 50°C, and the modification time is 2.5h, and then washed with clean water and subjected to a beating process with a beating degree of 40°SR to make pulp Material suspension B, wherein, plant fiber is coniferous wood;

[0049] Step 4, beating the aramid fiber B weighed in step 1 and diss...

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Abstract

The invention discloses composite plant fiber aramid paper which is prepared from the following components in percentage by mass: 82%-97% of an aramid fiber and 3%-20% of a plant fiber, wherein the sum of the components is 100%. The invention further discloses a preparation method of the composite plant fiber aramid paper. The method comprises the following steps: treating one of a meta-aramid chopped fiber and a para-aramid chopped fiber through phosphoric acid to prepare a slurry suspension; modifying the plant fiber with a NaOH solution to prepare a slurry suspension; preparing the slurry suspension from at least one of a para-aramid precipitation fiber, a para-aramid pulp fiber and a meta-aramid precipitation fiber; and mixing the three slurry suspensions, adding cationic polyacrylamide, and carrying out squeezing, drying, dipping, pre-pressing and hot-pressing processes to prepare the composite plant fiber aramid paper. According to the production technology, the synergistic effect and composite excellent performance of the hybrid fiber are developed on the premise of ensuring the paper making property of the composite aramid paper, the production cost of the aramid paper is reduced, and thus the method is suitable for large-scale production of the composite aramid paper.

Description

technical field [0001] The invention belongs to the technical field of papermaking industry and relates to a plant fiber aramid compound paper, and also relates to a preparation method of the plant fiber aramid compound paper. Background technique [0002] Aramid fiber has many advantages such as high strength, high modulus, high temperature resistance, low density, and small heat shrinkage, and is a representative of high-performance synthetic fibers. Aramid paper prepared from aramid fiber through papermaking wet papermaking and hot pressing process has light specific gravity, high specific strength, high specific stiffness, impact resistance, outstanding corrosion resistance, good high temperature stability and electromagnetic wave permeability As an advanced substrate composite material, it is widely used in high-temperature insulation materials, aerospace and high-performance electronic equipment and other fields. [0003] In view of the excellent performance of aramid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21H13/26D21H17/45D21H21/08
CPCD21H13/26D21H15/10D21H17/45D21H21/08
Inventor 陆赵情郝杨花莉王腊梅魏宁邹文俊毛慧敏
Owner SHAANXI UNIV OF SCI & TECH
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