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Preparation method of polyimide fiber paper

A technology of polyimide fiber and polyimide, which is applied in the field of preparation of polyimide fiber paper, can solve the problems of low strength of wet paper web, difficult traction of paper machine, poor performance of paper sheets, etc., and achieves Good practical application value and prospect, increase surface energy, and reduce the effect of preparation cost

Active Publication Date: 2017-02-22
JIANGNAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] On the one hand, the present invention solves the problems of low polyimide chopped fiber wet paper web strength, difficulty in forming, and difficult traction of the paper machine; Paper machine operation, poor paper performance and environmental problems caused by imide resin

Method used

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  • Preparation method of polyimide fiber paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Use 80g of dry polyimide 3mm chopped fibers and 20g of dry meta-aramid precipitated fibers as slurry, polyimide chopped fibers are treated with 10% NaOH at 30°C for 1 hour, and then washed with distilled water Fiber to neutral, the meta-aramid precipitated fiber is thawed and mixed with polyimide chopped fiber, pre-soaked for 1.5h under the condition of mechanical stirring, the amount of dispersant M is 2.605% of the dry pulp mass, Dissolve in distilled water to obtain the dispersant M solution, then mix with the slurry, soak for 0.5h under mechanical stirring, and then take the quantitative amount of 50g / m according to the wet papermaking process 2 Polyimide fiber base paper, the base paper is hot-pressed under the conditions of 10 MPa and 240° C. for 10 minutes in a hot press to obtain polyimide fiber paper.

[0041]Wherein, in the present embodiment, the dispersant M, in parts by weight, consists of 0.6 part of polyvinyl alcohol, 1.0 part of antistatic agent TM (meth...

Embodiment 2

[0044] Use 60g of dry polyimide 3mm chopped fibers and 40g of dry para-aramid fibrids as slurry, polyimide chopped fibers are treated with 5% KOH at 60°C for 1 hour, and then washed with distilled water Fiber to neutral, the p-aramid precipitated fiber is thawed and mixed with polyimide chopped fiber, pre-soaked for 1h under mechanical stirring, the amount of dispersant M is 3.006% of the dry pulp mass, with Dissolve in distilled water to obtain dispersant M solution, then mix with the slurry and soak for 1h under mechanical stirring, then take the quantitative amount of 40g / m according to the wet papermaking process 2 Polyimide fiber base paper, the base paper is hot-pressed under the conditions of 5Mpa and 280° C. for 15 minutes in a hot press to obtain polyimide fiber paper.

[0045] Among them, the dispersant M in this embodiment consists of 0.75 parts by weight of polyacrylamide, 0.9 parts of antistatic agent SN (octadecyldimethylhydroxyethyl quaternary ammonium nitrate),...

Embodiment 3

[0048] Using 90g of dry polyimide 6mm chopped fiber and 10g of dry polyester fiber as slurry, the polyimide chopped fiber was treated with 10.8% HCl at 90°C for 3 hours, and then washed with distilled water until neutral , mixed with polyester fiber and polyimide chopped fiber, pre-soaked for 2h under the condition of mechanical stirring, the amount of dispersant M was 2.808% of the mass of dry pulp, dissolved in distilled water to obtain dispersant M solution, and then mixed with pulp The materials are mixed and soaked for 1h under the condition of mechanical stirring, and then according to the wet papermaking process, the quantitative is 50g / m 2 Polyimide fiber base paper, the base paper is hot-pressed under the condition of 5Mpa and 300° C. for 5 minutes in a hot press to obtain polyimide fiber paper.

[0049] Among them, the dispersant M in the present embodiment, in parts by weight, consists of 0.65 parts of polyethylene oxide, 0.35 parts of antistatic agent P (ammonium a...

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Abstract

The invention discloses a preparation method of polyimide fiber paper, and belongs to the field of paper-making industries and materials. The method comprises the steps that polyimide chopped fiber is treated by a chemical reagent, the treated fiber is washed to be neutral, then, the fiber, a binder and a dispersing agent M are mixed according to a certain mass ratio, the fiber raw materials are dispersed into a pulp suspension, papermaking is performed through a paper making machine to obtain raw polyimide fiber paper, and finally hot pressing is performed through a hot press to obtain the polyimide fiber paper. According to the preparation method, the fiber is subjected to modification treatment, fiber surface active groups are added, the fiber surface energy and roughness are improved, the binding force of components in paper pages can be improved, the binder flows in the paper pages to achieve the effect of viscose fiber through hot pressing and melting, the preparation method can remarkably reduce chemical auxiliaries added in the polyimide fiber raw paper making process, environmental pollution caused in the paper making process can be reduced, and the mechanical performance, the electrical performance and the gas permeability of the polyimide fiber paper can be effectively improved.

Description

technical field [0001] The invention relates to a preparation method of polyimide fiber paper, which belongs to the field of papermaking industry and the field of materials. Background technique [0002] Polyimide fiber has excellent properties such as high and low temperature resistance, high strength and high modulus, high electrical insulation, and corrosion resistance. It is mainly used in high-temperature dust removal and filtration, protective fabrics, industrial flame-retardant and heat-insulating materials, and functional composite materials. Polyimide fiber has excellent performance. The special imide structure in its molecular chain results in smooth fiber surface, low surface energy, and strong chemical inertness. Therefore, the wet paper web strength of polyimide fiber obtained by papermaking is extremely low. , it is difficult for the paper machine to draw polyimide fiber base paper. In order to solve this problem, it is necessary to add styrene-butadiene latex,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/26D21H21/08D21H21/12D21F11/00
CPCD21F11/00D21H13/26D21H21/08D21H21/12
Inventor 龙柱陈乐桑明珠
Owner JIANGNAN UNIV
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