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Preparation method of polyimide paper honeycomb core

A technology of polyimide paper and honeycomb core, which is applied in papermaking, cardboard articles, textiles and papermaking, etc., can solve the problems of use and cannot be used as a wave-transmitting material, and can expand the field of use, reduce permeability, and facilitate operation. Effect

Active Publication Date: 2013-08-28
ARAMICORE COMPOSITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the service temperature of aluminum honeycomb is high, it cannot be used as a wave-transparent material

Method used

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  • Preparation method of polyimide paper honeycomb core
  • Preparation method of polyimide paper honeycomb core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 Shown, a kind of preparation method of polyimide paper honeycomb core, the cell size of this polyimide paper honeycomb core is 2.75mm, and density is 72kg / m 3 , the preparation method specifically includes the following steps:

[0032] (1) Use the polyimide fiber paper with a thickness of 0.08mm as the raw material paper to apply the glue with the glue roller dipped in the core strip glue, then stack the multi-layer glued raw paper in staggered layers, and finally use hot pressing Machine hot pressing to make honeycomb stack. The core strip glue is a high temperature core strip glue with a viscosity of 20s / 50ml. When hot pressing, first preheat at 70°C-100°C for 30min-60min, then gel at 120°C-160°C for 90min-150min, and finally cure at 170°C-190°C for 2h-5h, and the hot pressing pressure is 5MPa-7MPa.

[0033] (2) After stretching the honeycomb stack with a stretching machine at a stretching speed of 5mm / min-25mm / min, it is formed as figure 2 The r...

Embodiment 2

[0040] Such as figure 1 Shown, a kind of preparation method of polyimide paper honeycomb core, the cell size of this polyimide paper honeycomb core is 1.83mm, and density is 32kg / m 3 , the difference between the preparation method and Example 1 is:

[0041] The thickness of polyimide paper is 0.04mm. The viscosity of the high-temperature core strip glue used in step (1) of the preparation method of this embodiment is 35s / 50ml, and the number of dipping times in step (3) is one time.

Embodiment 3

[0043] Such as figure 1 Shown, a kind of preparation method of polyimide paper honeycomb core, the cell size of this polyimide paper honeycomb core is 3.67mm, and density is 40kg / m 3 , the difference between the preparation method and Example 1 is:

[0044] The thickness of polyimide paper is 0.05mm. The viscosity of the high-temperature core strip glue used in step (1) of the preparation method of this embodiment is 40s / 50ml, and the number of dipping times in step (3) is two times.

[0045] It should be noted that in the preparation method of the present invention, the type of honeycomb cell formed in the stretching process is not limited to the regular hexagon in Examples 1-3, and may also be rectangular, rhombus or flexible honeycomb. In the dipping solution, the selection of the organic solvent is not limited to that described in the examples. The hot press, dipping machine and stretching machine can all be selected from the corresponding equipment commonly used in thi...

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Abstract

The invention relates to a preparation method of a polyimide paper honeycomb core. The method includes the following steps: (1) raw material paper is glued, laminated and hot-pressed, and a honeycomb stacked block is manufactured; (2) the honeycomb stacked block is molded at high temperature after being pulled, and a white honeycomb block is manufactured; (3) gum dipping is carried on the white honeycomb block, and the white honeycomb block is solidified; (4) a honeycomb after the gum dipping and solidification is sliced. The method is characterized in that the raw material paper is polyimide paper. Due to the fact that the polyimide paper is made of polyimide fibers, good characteristics of the polyimide fibers are inherited. Therefore, the prepared polyimide paper honeycomb core has better heat-resistant performance, dielectric performance, smoke and fire toxicity and mechanical performance compared with an aramid fiber paper honeycomb core in the prior art, the water absorption rate is low, the application field is widened, and service life of the honeycomb is prolonged in special environments. Production equipment of the aramid fiber paper honeycomb core in the prior art can be used, novel instruments and devices do not need to be added, process procedures are basically unchanged, operation is convenient, and equipment cost is not increased.

Description

technical field [0001] The invention relates to a preparation method of a honeycomb core, in particular to a preparation method of a paper honeycomb core. Background technique [0002] The honeycomb core refers to the core sandwiched between two skins in the honeycomb panel, which has a honeycomb-shaped cell as a whole. It is obtained by superimposing, pasting, stretching, dipping and curing of multi-layer plates, and has very high strength and rigidity. Common paper honeycomb cores, metal honeycomb cores, etc., and paper honeycomb cores are usually made of aramid paper, which has lighter weight, higher strength, hardness, and better softness. However, on the one hand, the maximum use temperature of aramid paper is around 200°C, which limits the high temperature resistance of the finished honeycomb core. On the other hand, aramid paper itself has strong polarity and is easy to absorb water because it contains amide groups. After the paper honeycomb is made into paper honey...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B31D3/02
CPCB31D3/0223D21H13/26
Inventor 隋广忠穆举杰刘玉杨洪
Owner ARAMICORE COMPOSITE
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