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Technology for carrying out electrostatic coating on base of non-conductor

A non-conductor, electrostatic spraying technology, used in devices and coatings that apply liquid to the surface, can solve the problems of difficult electrostatic spraying, complex procedures, and high costs

Active Publication Date: 2015-09-30
BEIJING NATURE STONE SCI TECH DEVP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to technical limitations, non-conductors such as glass and plastic are currently difficult to achieve electrostatic spraying
For glass, some enterprises currently use preheating to improve conductivity and realize electrostatic coating, but the energy consumption is high, the process is complicated, and the cost is high.

Method used

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  • Technology for carrying out electrostatic coating on base of non-conductor
  • Technology for carrying out electrostatic coating on base of non-conductor
  • Technology for carrying out electrostatic coating on base of non-conductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present invention achieves the purpose of uniform conduction by performing superhydrophilic modification on glass and spraying water, so that it is suitable for electrostatic spraying. Proceed as follows.

[0026] (1) Take 300*300*2mm ordinary flat glass, and use 100# water sand to fully and repeatedly stagger and polish it until there is no obvious reflection.

[0027] (2) Soak the above glass in an alkali bucket for 3 hours, then take it out, and rinse it with tap water until the water flows down flat.

[0028] (3) Using a spray device, spray the surface treatment solution on the glass obtained in (2) until it is fully covered. Then let dry. At this point, the water droplets can spread sufficiently on the surface.

[0029] (4) Using a spraying device, spray tap water on the above-mentioned glass until it is fully covered and there is no water flow.

[0030] (5) Ground the above glass and place it in the powder spraying room with an inclination of 75°. Adjust ...

Embodiment 2

[0033] The present invention achieves the purpose of uniform conduction by performing superhydrophilic modification on polycarbonate and spraying water, so that it is suitable for electrostatic spraying. Proceed as follows.

[0034] (1) Take a 300*300*1mm ordinary polycarbonate flat plate, and use 300# water sand to fully and repeatedly stagger it until there is no obvious reflection.

[0035] (2) The above-mentioned glass is fully rinsed with tap water. and let dry.

[0036] (3) Using a spray device, spray the surface treatment solution on the polycarbonate flat plate obtained in (2) until it is fully covered. Then let dry. At this point, the water droplets can spread sufficiently on the surface.

[0037] (4) Using a spray device, spray tap water on the above polycarbonate plane until it is fully covered and there is no water flow.

[0038] (5) Ground the polycarbonate above and place it in the powder spraying room with an inclination of 75°. Adjust the powder spraying ...

Embodiment 3

[0041] The present invention achieves the purpose of uniform conduction by performing superhydrophilic modification on polypropylene and spraying water, so that it is suitable for electrostatic spraying. Proceed as follows.

[0042] (1) Take a 300*300*5mm ordinary polypropylene plate, and use 300# water sand to fully and repeatedly stagger and polish it until there is no obvious reflection.

[0043] (2) The above-mentioned polypropylene plate was fully rinsed with tap water. and let dry.

[0044] (3) Using a spray device, spray the surface treatment solution on the polypropylene obtained in (2) until it is fully covered. Then let dry. At this point, the water droplets can spread sufficiently on the surface.

[0045] (4) Using a spraying device, spray tap water on the above-mentioned polypropylene until it is fully covered and there is no water flow.

[0046] (5) Ground the above workpiece and place it in the powder spraying room with an inclination of 75°. Adjust the pow...

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Abstract

The invention provides a technology for carrying out electrostatic coating on a surface of a non-conductor. The non-conductor comprises glass, plastic and the like. Ordinary low-temperature epoxy polyester powder coating which is sold on the market is adopted, the coating is divided into two parts, namely conductive treating and the electrostatic coating. The technology comprises the specific steps of polishing, cleaning, super-hydrophilic embellishing, tap water atomizing, the electrostatic coating and solidifying. The conductive workpiece surface is required by the electrostatic coating. Due to the fact that a conductive water film which is even, extremely thin and free of fluidity is formed on the workpiece surface, the technical limitation that the electrostatic coating is carried out on the surface of a non-conductive insulating body is solved. Due to the fact that the water film is even and free of the fluidity, the influence on powder adhering by water flowing is avoided. Before heating and melting are carried out on powder, the water film is evaporated rapidly, and a bubble or a hole is prevented from forming in a painting film. The technology has the advantages of being environmentally protected, low in cost, low in energy consumption, simple in procedures, high in powder utilization, and even in coating layer.

Description

technical field [0001] The invention relates to an electrostatic spraying process, in particular to a method for conducting conductive pretreatment and electrostatic spraying on a non-conductor substrate. Background technique [0002] Electrostatic powder spraying is one of the fastest-growing construction processes in the current coating process. The principle is: a high-voltage corona discharge electric field is formed between the spray gun and the workpiece. When the powder particles are ejected from the spray gun mouth and pass through the discharge area, a large number of electrons are collected and become negatively charged particles. Under the environment, it is adsorbed to the positively charged workpiece, and then the powder layer becomes a uniform film layer after heating, baking and curing. The workpiece needs to have a certain conductivity in order to be positively charged. [0003] For electrostatic spraying of non-conductors, a conductive pretreatment is requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/04B05D1/06
Inventor 江雷郑爽田野
Owner BEIJING NATURE STONE SCI TECH DEVP
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