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
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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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