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Preparation method of para-aramid paper honeycomb core

A technology of para-aramid paper and honeycomb core material, which is applied to cardboard articles and other directions, can solve the problems of low specific strength of meta-aramid paper honeycomb, electrochemical corrosion, poor wave transmission performance, etc., to improve the overall performance of the structure, High temperature resistance grade, excellent heat resistance effect

Inactive Publication Date: 2017-05-24
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The aluminum honeycomb core material is made of aluminum foil through gluing, pressing, stretching and other processes. The cost of raw materials is lower than that of aramid paper. Poor performance, gradually replaced by aramid paper honeycomb in aerospace field
[0003] Due to the advantages of high specific strength and large specific modulus, meta-aramid paper honeycomb has been widely used in the aerospace field. It is mainly used in the secondary load-bearing parts and interior parts of the aircraft body. In structural parts, the specific strength of the meta-aramid paper honeycomb is relatively low due to the large load borne by the members

Method used

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  • Preparation method of para-aramid paper honeycomb core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A regular hexagonal para-aramid paper honeycomb core with cell side length B of 1.83 mm was prepared. Specific steps are as follows:

[0040] (1) Using para-aramid paper with a thickness of 0.05mm as the raw material, first apply epoxy resin core strip glue to the aramid paper on the glue applicator, and then cut the aramid paper according to the target length after coating, and the multi-layer The glued para-aramid paper is stacked in dislocation to obtain a para-aramid paper laminate. After the lamination is completed, use a hot press machine to heat press the prepared laminate according to the curing process of the core strip glue, and then cure it to make a honeycomb laminate. The core strip glue is a modified phenolic epoxy resin liquid glue, which is made of special nitrile rubber as a toughening material, mixed with aromatic amine as a curing agent, and dissolved with an appropriate solvent. The glue viscosity is 30s / ml. When curing by hot pressing, first preh...

Embodiment 2

[0046] A regular hexagonal para-aramid paper honeycomb core with cell side length B of 2.75 mm was prepared. Specific steps are as follows:

[0047] (1) Using para-aramid paper with a thickness of 0.05mm as the raw material, firstly glue the aramid paper on the gluing machine, cut the aramid paper according to the required size after gluing, and cut the aramid paper after multi-layer gluing The para-aramid paper is stacked in dislocation. After the stacking is completed, the laminated board is hot-pressed with a hot press, and it is cured according to the curing process of the core strip glue to make a honeycomb laminated board. The core strip glue is a modified phenolic epoxy resin, which is a liquid glue made of special nitrile rubber as a toughening material, mixed with aromatic amine as a curing agent, and dissolved in an appropriate solvent. The viscosity of the glue is 25s / ml. When curing by hot pressing, first preheat at 70°C for 30 minutes, then cure at 180°C for 6 ho...

Embodiment 3

[0053] An overstretched para-aramid paper honeycomb core with cell side length B of 2.75 mm was prepared. Specific steps are as follows:

[0054] (1) Using para-aramid paper with a thickness of 0.05mm as the raw material, firstly glue the aramid paper on the gluing machine, cut the aramid paper according to the required size after gluing, and cut the aramid paper after multi-layer gluing The para-aramid paper is stacked in dislocation. After the stacking is completed, the laminated board is hot-pressed with a hot press, and it is cured according to the curing process of the core strip glue to make a honeycomb laminated board. The core strip glue is a modified phenolic epoxy resin, which is a liquid glue made of special nitrile rubber as a toughening material, mixed with aromatic amine as a curing agent, and dissolved in an appropriate solvent. The viscosity of the glue is 25s / ml. When curing by hot pressing, first preheat at 70°C for 30 minutes, then cure at 180°C for 6 hours...

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Abstract

The invention belongs to the technical field of composite material preparation, and relates to a preparation method of a para-aramid paper honeycomb core. The preparation method of the para-aramid paper honeycomb core is used for preparing a sandwich-structure composite material, and comprises the four treatment process steps of sequentially gluing and pressing para-aramid paper, stretching and setting the para-aramid paper, glue dipping and solidifying the para-aramid paper, and slicing processing the para-aramid paper. A para-aramid paper honeycomb prepared through the preparation method provided by the invention has higher specific strength and specific modulus, and a more excellent heat-resisting property; and under the same design requirement, the weight of a composite material component can be further reduced. The para-aramid paper honeycomb core prepared by adopting the method provided by the invention has higher strength and modulus, under the same mechanical property design requirement, the weight of the high-performance para-aramid paper honeycomb is reduced greatly, and the para-aramid paper honeycomb core can be widely applied in high-end fields such as aerospace.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and relates to a preparation method of para-aramid paper honeycomb core material, which is used for the preparation of sandwich structure composite materials. Background technique [0002] The aluminum honeycomb core material is made of aluminum foil through gluing, pressing, stretching and other processes. The cost of raw materials is lower than that of aramid paper. Poor performance, gradually replaced by aramid paper honeycomb in aerospace field. [0003] Due to the advantages of high specific strength and large specific modulus, meta-aramid paper honeycomb has been widely used in the aerospace field. It is mainly used in the secondary load-bearing parts and interior parts of the aircraft body. Among the structural parts, the specific strength of the meta-aramid paper honeycomb is relatively low due to the large load borne by the members. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B31D3/02
CPCB31D3/02B31D3/0223B31D3/0292
Inventor 罗玉清郝巍王萌刘杰马科峰
Owner AVIC COMPOSITES
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