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Preparation method of water soluble phenolic resin honeycomb core material

A technology of water-soluble phenolic resin and honeycomb core material, which is applied in the direction of cardboard articles, can solve the problems of high manufacturing cost, electrochemical corrosion, and low cost of aramid paper honeycomb, and achieve low-carbon environmental protection manufacturing technology, material cost and manufacturing low cost effect

Inactive Publication Date: 2017-08-18
AVIC COMPOSITES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cost of aluminum honeycomb is low, and it has been widely used in the early aerospace field. However, it was found in the process of use that the aluminum honeycomb is very prone to electrochemical corrosion after being combined with the composite material panel, and the wave transmission performance is poor. Replaced by Aramid Paper Honeycomb
Aramid paper honeycomb has the advantages of high specific strength, large specific modulus, light weight, and strong designability. It has been widely used in the aerospace field, especially in the secondary load-bearing parts and interior parts of aircraft bodies. Aramid paper honeycomb is made of aramid paper, core glue and impregnated resin, but the manufacturing cost of aramid paper honeycomb is relatively high, and it is difficult to be widely used in civilian fields

Method used

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  • Preparation method of water soluble phenolic resin honeycomb core material
  • Preparation method of water soluble phenolic resin honeycomb core material

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preparation example Construction

[0034] During the preparation of the honeycomb, flame retardant treatment is required. The flame retardant is a phosphorus-nitrogen flame retardant. The flame retardant treatment can be carried out during the soaking process of the honeycomb laminate in step 2, or during the dipping process of step 3. .

[0035] As a preferred solution of the present invention, in step 1), the plant fiber paper is prepared from one or more of materials such as wood fiber, hemp fiber, bamboo fiber, polyester fiber, and aramid fiber. The surface density of plant fiber paper is 30-80g / m 2 .

[0036] As a preferred solution of the present invention, in step 1), the core strip glue is a medium-temperature curing epoxy adhesive, and the viscosity range of the glue is 15s / 50ml-40s / 50ml.

[0037] As a preferred solution of the present invention, in step 1), when pressing, first preheat at 60-80°C for 30-50min, then solidify at 105-165°C for 3-6h, and the hot pressing pressure is 0.3- 0.6MPa.

[00...

Embodiment 1

[0047] A regular hexagonal water-soluble phenolic resin honeycomb core material with cell side length B of 1.83 mm was prepared. Specific steps are as follows:

[0048] (1) Using plant fiber paper with a thickness of 0.05mm as the raw material, first glue the plant fiber paper on the gluing machine, cut off the plant fiber paper according to the required size after the process calculation, and glue the multi-layer glue The plant fiber paper is stacked in dislocation. After the stacking is completed, the honeycomb laminate is hot-pressed on a hot press, and it is cured according to the curing process of the core strip glue to make a honeycomb laminate. The core strip glue is a medium-temperature curing epoxy resin, the toughening material is special nitrile rubber, the curing agent is mixed aromatic amine, the solvent is ethyl acetate or acetone, and the glue viscosity is 18s-24s / 50ml. When curing by hot pressing, first preheat at 70°C for 30 minutes, then cure at 135°C for 6 ...

Embodiment 2

[0054] A regular hexagonal plant fiber paper honeycomb core with cell side length B of 2.75 mm was prepared. Specific steps are as follows:

[0055] (1) Using plant fiber paper with a thickness of 0.05mm as the raw material, first glue the plant fiber paper on the gluing machine, cut the plant fiber paper according to the required size after gluing, and cut the plant fiber paper after multi-layer gluing The paper is stacked in dislocation. After the stacking is completed, the honeycomb laminate 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 laminate. The core strip glue is a medium temperature curing epoxy resin, the toughening material is special nitrile rubber, the curing agent is mixed aromatic amine, the solvent is ethyl acetate or acetone, and the glue viscosity is 22s / 50ml. When curing by hot pressing, first preheat at 70°C for 30 minutes, then cure at 135°C for 5 hours, and the hot pressing pr...

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Abstract

The invention belongs to the technical field of preparation of composite materials, and relates to a preparation method of a water soluble phenolic resin honeycomb core material for preparing a sandwich structured composite material. A five-step treatment process of gluing and pressing, stretching and shaping, gumming and curing, flame retardance and slicing is performed for a plant fiber paper in sequence; compared with traditional meta-position aramid fiber paper honeycombs, the process of preparing the honeycomb core material by the method is environment-friendly, free of the solvent volatilization, low in harm to human bodies and free of the explosion risk; and the prepared honeycomb core material has equivalent performances to the traditional meta-position aramid fiber paper honeycomb core materials, is higher in cost performance, and can be applied to such fields as aircraft interiors and rail transit.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and relates to a method for preparing a water-soluble phenolic resin honeycomb core material, which is used for preparing sandwich structure composite materials. Background technique [0002] Honeycomb core materials for resin-based sandwich structure composite materials mainly include aluminum honeycomb core materials, aramid paper honeycomb core materials and glass cloth honeycomb core materials. It is formed by laminating and gluing, and it can also be printed on the aluminum foil first, and manufactured by stretching. The cost of aluminum honeycomb is low, and it has been widely used in the early aerospace field. However, it was found in the process of use that the aluminum honeycomb is very prone to electrochemical corrosion after being combined with the composite material panel, and the wave transmission performance is poor. Replaced by aramid paper honeycomb. Arami...

Claims

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Application Information

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IPC IPC(8): B31D3/02
CPCB31D3/0223B31D3/0284B31D3/0292
Inventor 刘杰马科峰罗玉清郝巍李瑞敏王萌
Owner AVIC COMPOSITES
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