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A kind of polyaramid fiber paper and preparation method thereof

A technology of polyaramid fiber and polyaramid, which is applied in the field of polyaramid fiber paper and its preparation, can solve problems such as heat flux density that has not been studied, and achieve the effect of improving performance, improving paper performance, and good dispersion performance

Active Publication Date: 2019-07-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a lot of research is only based on raw material optimization and selection, wet papermaking technology, hot pressing process and equipment adjustment, and paper performance analysis. There is no research related to the design and control of heat flux during hot pressing.

Method used

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  • A kind of polyaramid fiber paper and preparation method thereof
  • A kind of polyaramid fiber paper and preparation method thereof
  • A kind of polyaramid fiber paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take a certain amount of PMIA fiber and a certain amount of PMIA pulp, the total mass is T; the mass ratio of fiber to pulp is 1:1, that is, the quality of polyaramid fiber accounts for 50% T, and PMIA fiber is added into water to form Mass concentration is 0.01% suspension, PMIA pulp is added in the suspension; By the addition of PEO resin is 0.5% T, adding concentration is 0.1% PEO resin solution, after adding in the sheet machine, will wet The paper sheets are dried in a dryer at 105°C for 10 minutes, and then hot-pressed on a flat vulcanizer. During hot-pressing, a layer of 0.5mm high-temperature-resistant polyester film is added to the upper and lower surfaces of the paper to achieve strong heat flow during the hot-pressing process. Such as figure 1 As shown, the hot-pressing temperature is 260° C., the hot-pressing time is 10 minutes, and the hot-pressing pressure is 10 MPa; namely, a high-performance polyaramid fiber paper prepared under different heat flux densi...

Embodiment 2

[0043] During hot pressing, a layer of steel plate and a layer of heat insulating film were respectively added on the upper and lower surfaces of the paper to realize weak heat flow during the hot pressing process, and other conditions were the same as in Example 1.

Embodiment 3

[0051] Weigh 2g of PMIA fiber in water to form a suspension with a mass concentration of 0.03%; weigh 2g of PMIA pulp and add it to the suspension; the total mass of PMIA fiber and PMIA pulp is T, and then press the amount of PEO resin added To 0.8% T, add a PEO resin solution with a concentration of 0.6%, and then add it to the sheet machine, dry the wet paper sheet in a dryer at 105°C for 10 minutes, and then perform hot pressing on a flat vulcanizing machine. Add a layer of steel plate and a layer of heat insulation film on the upper and lower surfaces of the paper, the thickness of the steel plate and heat insulation film are both 0.4mm, to realize the weak heat flow during the hot pressing process, such as figure 2 As shown, the hot-pressing temperature is 240-290° C., the hot-pressing time is 8 minutes, and the hot-pressing pressure is 8 MPa; a high-performance polyaramid fiber paper is obtained.

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Abstract

The invention relates to aramid fiber paper and a preparation method thereof. Firstly, an aramid fiber suspension liquid is mixed with aramid pulp and defibered uniformly, and a pulp A is obtained; the pulp A is mixed with a PEO (polyoxyethylene) resin solution and defibered uniformly, and a pulp B is obtained; the total mass of the aramid fiber and the aramid pulp is T, the aramid fiber accounts for 20%-50% of T, and the addition amount of the PEO resin is 0.5%-1.0% of T; the pulp B is subjected to papermaking and drying, dry paper is obtained, a plurality of heat transfer plates are symmetrically added to two sides of the dry paper, hot pressing is performed, and the aramid fiber paper is obtained. The PEO resin has the advantages of non-toxic performance, little consumption, good dispersion performance, retention aiding, filtering aiding and the like; heat flow transferred to paper is in different densities due to the fact that the heat transfer plates are stacked on the surface of the paper, and the performance of the aramid fiber paper is improved.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to polyaramid fiber paper and a preparation method thereof. Background technique [0002] High-performance polyaramid fiber paper-based composite materials (polyaramid paper) represented by meta-aramid fiber (PMIA), polysulfonamide fiber (PSA) and polyimide (PI), have excellent mechanical properties, high temperature resistance And radiation resistance, it is currently recognized as an advanced lightweight and high-strength structural material in the world. The pure polyaramid base paper is made of such short-cut fibers and their corresponding pulp (micro-nano fibers) through wet papermaking technology, and then subjected to high-temperature hot pressing to obtain performance improvement. However, the traditional hot-pressing process and method of thermoplastic materials are difficult to achieve various performance indicators of paper. At present, except for aramid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/26D21H17/55D21F9/00
CPCD21F9/00D21H13/26D21H17/55
Inventor 张素风赵东艳钱立伟侯晨修慧娟迟聪聪李鹏辉
Owner SHAANXI UNIV OF SCI & TECH