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A method for preparing a sandwich layer for a composite sandwich panel by using an electrostatic spraying method

A technology of electrostatic spraying and sandwich layer, applied in coating, chemical instrument and method, device for coating liquid on the surface, etc., can solve the problems of difficult to control thickness, high production cost, difficult processing, etc., to increase the thickness , the effect of reducing the dosage

Active Publication Date: 2022-05-24
重庆泛锐科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that complex foam is difficult to process, high production cost, and difficult to control the thickness when it is used as the sandwich layer of thin-layer composite sandwich panels, the purpose of the present invention is to provide a sandwich panel for composite sandwich panels prepared by electrostatic spraying method. layer method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a sandwich layer for a composite sandwich panel by an electrostatic spraying method, the preparation steps are as follows:

[0025] (1), lay a layer of glass fiber cloth;

[0026] (2) Use the liquid electrostatic spraying equipment to spray the mixture of liquid thermosetting resin and curing agent on the glass fiber cloth to obtain the thermosetting resin layer;

[0027] (3), placing a layer of honeycomb core material on the thermosetting resin layer obtained in step (2);

[0028] (4), using powder electrostatic spraying equipment to spray hollow glass microspheres in the honeycomb core material obtained in step (3) to obtain a hollow glass microsphere layer;

[0029] (5), spray the mixture of liquid thermosetting resin and curing agent on the hollow glass microsphere layer obtained in step (4) by using liquid electrostatic spraying equipment to obtain a thermosetting resin layer, and then use powder electrostatic spraying equipment to spray hol...

Embodiment 2

[0034] A method for preparing a sandwich layer for a composite sandwich panel by an electrostatic spraying method, the preparation steps are as follows:

[0035] (1), lay a layer of glass fiber cloth;

[0036] (2) Use the liquid electrostatic spraying equipment to spray the mixture of liquid thermosetting resin and curing agent on the glass fiber cloth to obtain the thermosetting resin layer;

[0037] (3), placing a layer of honeycomb core material on the thermosetting resin layer obtained in step (2);

[0038] (4), using powder electrostatic spraying equipment to spray hollow glass microspheres in the honeycomb core material obtained in step (3) to obtain a hollow glass microsphere layer;

[0039] (5), spray the mixture of liquid thermosetting resin and curing agent on the hollow glass microsphere layer obtained in step (4) by using liquid electrostatic spraying equipment to obtain a thermosetting resin layer, and then use powder electrostatic spraying equipment to spray hol...

Embodiment 3

[0044] A method for preparing a sandwich layer for a composite sandwich panel by an electrostatic spraying method, the preparation steps are as follows:

[0045] (1), lay a layer of glass fiber cloth;

[0046] (2) Use liquid electrostatic spraying equipment to spray the mixture of liquid thermosetting resin and curing agent on the glass fiber cloth to obtain the thermosetting resin layer;

[0047] (3), placing a layer of honeycomb core material on the thermosetting resin layer obtained in step (2);

[0048] (4), using powder electrostatic spraying equipment to spray hollow glass microspheres in the honeycomb core material obtained in step (3) to obtain a hollow glass microsphere layer;

[0049] (5), spray the mixture of liquid thermosetting resin and curing agent on the hollow glass microsphere layer obtained in step (4) by using liquid electrostatic spraying equipment to obtain a thermosetting resin layer, and then use powder electrostatic spraying equipment to spray hollow gl...

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Abstract

The invention discloses a method for preparing a sandwich layer for a composite sandwich plate by using an electrostatic spraying method. Place a layer of glass fiber cloth flatly; liquid electrostatically spray a thermosetting resin layer on the glass fiber cloth; place a layer of honeycomb core material on the obtained thermosetting resin layer; powder electrostatically spray a hollow glass microsphere layer in the obtained honeycomb core material; A layer of thermosetting resin is electrostatically sprayed on the obtained hollow glass microsphere layer, and a layer of hollow glass microsphere is electrostatically sprayed on the powder, so that the thermosetting resin layer and the hollow glass microsphere layer are alternately sprayed until the holes of the honeycomb core material are filled. , but make sure that the last layer is thermosetting resin; spread a layer of glass fiber cloth on the surface of the obtained last layer of thermosetting resin layer, and then place it on a calender for extrusion. The invention can select the appropriate thickness of the honeycomb core material according to the thickness of the required plate material, and solves the difficult problem that the thin-layer composite foam is difficult to control the thickness.

Description

technical field [0001] The invention belongs to the technical field of composite sandwich panels, in particular to a method for preparing a sandwich layer for a composite sandwich panel by using an electrostatic spraying method. Background technique [0002] Syntactic foam originated in the 1960s, when it was mainly used for underwater equipment in the marine field, such as underwater robots, diving bells, etc., as buoyancy materials. Other types of foam materials at the same time cannot meet these requirements. Under the condition of high hydrostatic pressure, ordinary foam materials usually have the phenomenon that the cell unit is broken and connected, resulting in a significant decrease in its ability to provide buoyancy. Unlike traditional foamed foams, syntactic foams can have high compressive strength because rigid hollow spheres make up their cell structure and are independent of each other, thereby minimizing the water absorption of the material while at the same ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/06B32B37/10B32B38/00B05D1/04B05D1/06
CPCB32B37/06B32B37/10B32B38/00B05D1/04B05D1/06B32B2038/0052B32B2250/40B32B2307/304B32B2315/085B32B2605/08
Inventor 姚栋嘉吕多军张东生刘喜宗吴恒杨超冯婷董会娜
Owner 重庆泛锐科技有限公司
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