Polyimide paper honeycomb core and preparation method thereof

A technology of polyimide paper and polyimide glue, applied in special paper, paper, papermaking and other directions, can solve the problems of high temperature resistance, low hygroscopicity, poor water resistance, and low use temperature, and achieve low hygroscopicity, High decomposition temperature, the effect of increasing strength

Inactive Publication Date: 2014-05-21
吉林高琦聚酰亚胺材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defects of low service temperature and poor water resistance of the existing paper honeycomb core, the purpose of the present invention is to provide a polyimide paper honeycomb core, which has the characteristics of high temperature resistance, low hygroscopicity and high strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A polyimide paper honeycomb core with a space side length of 1.83 mm was prepared. Specific steps are as follows:

[0034] (1) Use polyimide paper with a thickness of 0.05 mm as the raw material. Glue is applied with a glue roller dipped in core strip glue, and then the polyimide paper after multi-layer glue coating is stacked in staggered layers, and finally hot pressed by a hot press to make a honeycomb stack. The core strip glue is polyimide glue, which is polymerized by phthalic anhydride and m-phenylenediamine, with a viscosity of 30s / 50ml. When hot pressing, first preheat at 80°C for 50 minutes, then gel at 130°C for 100 minutes, and finally cure at 250°C for 4 hours, and the hot pressing pressure is 6MPa.

[0035] (2) The honeycomb block is stretched with a stretching machine at a stretching speed of 10mm / min to form regular hexagonal honeycomb cells, and then set in an oven at 300°C for 40min. Made of white honeycomb blocks.

[0036] (3) Dip and solidify the...

Embodiment 2

[0041] A polyimide paper honeycomb core with a space side length of 3.67 mm was prepared. Specific steps are as follows:

[0042] (1) Use polyimide paper with a thickness of 0.08mm as the raw material. Glue is applied with a glue roller dipped in core strip glue, and then the polyimide paper after multi-layer glue coating is stacked in staggered layers, and finally hot pressed by a hot press to make a honeycomb stack. The core strip glue is polyimide glue, which is polymerized by phthalic anhydride and m-phenylenediamine, with a viscosity of 25s / 50ml. When hot pressing, first preheat at 90°C for 40 minutes, then gel at 120°C for 120 minutes, and finally cure at 160°C for 5 hours, and the hot pressing pressure is 5MPa.

[0043] (2) Stretch the honeycomb block with a stretching machine at a stretching speed of 5-20mm / min to form a regular hexagonal honeycomb cell, and then set it in an oven at 300°C for 60min. Made of white honeycomb blocks.

[0044] (3) Dip and solidify the...

Embodiment 3

[0049] A polyimide paper honeycomb core with a space side length of 2.75 mm was prepared. Specific steps are as follows:

[0050] (1) Use polyimide paper with a thickness of 0.13mm as the raw material. Glue is applied with a glue roller dipped in core strip glue, and then the polyimide paper after multi-layer glue coating is laminated in a staggered layer, and finally hot pressed by a hot press to make a honeycomb stack. The core strip glue is polyimide glue, which is polymerized from diphenyl ether dianhydride and m-phenylenediamine, with a viscosity of 35s / 50ml. When hot pressing, first preheat at 70°C for 50 minutes, then gel at 140°C for 90 minutes, and finally cure at 250°C for 3 hours, and the hot pressing pressure is 7MPa.

[0051] (2) Stretch the honeycomb block with a stretching machine at a stretching speed of 10-15mm / min to form a regular hexagonal honeycomb cell, and then set it in an oven at 310°C for 80min. Made of white honeycomb blocks.

[0052] (3) Dipping...

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Abstract

The invention discloses a polyimide paper honeycomb core and a preparation method thereof. The polyimide paper honeycomb core is prepared by the following methods: (1) performing gluing treatment, namely coating a polyimide adhesive on the surface of polyimide paper, superposing multilayer glued polyimide paper in a staggered mode, and finally performing hot-pressing to prepare a honeycomb laminate by utilizing a hot press; (2) performing setting treatment, namely stretching the honeycomb laminate, forming regular hexagon honeycomb hole lattices, and setting in a drying box to preparw white honeycomb blocks; (3) performing impregnation treatment, namely impregnating and curing the white honeycomb blocks to prepare the polyimide paper honeycomb core. The polyimide paper honeycomb core prepared by the method has the characteristics of high temperature resistance and low moisture absorption property, and the strength of the polyimide paper honeycomb core can be further improved.

Description

[0001] technical field [0002] The invention relates to a polyimide paper honeycomb core and a preparation method thereof, belonging to the fields of papermaking technology and insulating material manufacturing. [0003] Background technique [0004] The honeycomb core is made according to the principle of honeycomb structure in nature. It uses high-strength cores to connect into countless hollow three-dimensional regular hexagonal structures through bonding, stretching and other processes to form an overall force-bearing member. Commonly used honeycomb core materials are aluminum honeycomb core and paper honeycomb core. The price of aluminum honeycomb core is low and the service temperature is high. However, due to the high density of aluminum, it cannot be used as a wave-transmitting material. It is mainly used in construction fields that are not sensitive to weight. The paper honeycomb core is usually made of aramid paper, but the maximum use temperature of aramid pape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00B31D3/02
Inventor 谭洪艳丁孟贤刘斌吕晓义张万彬邵会千韩京成于暴冷艺飞
Owner 吉林高琦聚酰亚胺材料有限公司
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