A kind of energy-saving and environment-friendly roller coating paint for thick plates and its application method

Abstract

The invention provides an energy-saving and environment-friendly roller coating paint for a thick plate and a use method of the energy-saving and environment-friendly roller coating paint. The paint comprises priming paint and finishing coat; the paint has the advantages of high adhesive force, good ductility, high temperature resistance and long service life; by using the paint, the processing technique of thick plate products is changed, and processing procedures are simplified; roller coating treatment is centrally finished on the thick plate, and independent setting of a spraying workshop is unnecessary.

Description

technical field [0001] The invention relates to an energy-saving and environment-friendly roller coating paint for thick plates and a method for using the paint, which is mainly suitable for thick plate products such as oil drums, electric box panels, mechanical panels, and metal boxes for product packaging. Background technique [0002] The existing thick plate coating process mainly adopts spraying technology: first, the thick plate slab is stamped and deep drawn into the shape of oil barrels, electrical box panels, mechanical panels, and product packaging metal boxes, and then sent to the spraying workshop for spraying to obtain the shape. Oil barrels, electrical box boards, mechanical panels, product packaging metal box products. [0003] Among them, spraying is a coating method that is dispersed into uniform and fine mist droplets by means of pressure or centrifugal force through a spray gun or a disc atomizer, and applied to the surface of the object to be coated. [...

AI Technical Summary

Problems solved by technology

[0006] 1) The amount of paint is large, but the utilization rate is low, resulting in waste

During the spraying process, because the paint is not resistant to high temperature, the paint will change color if the temperature is too high, so the low-temperature spraying is used, resulting in a small amount of spraying each time, and it needs to be sprayed 3 to 5 times to complete the spraying of the formed thick plate products, causing damage to the product. waste of paint;

[0007] 2) There are volatile materials in the paint used in the existing spraying process. During the spraying process, only 30-40% of the paint is attached to the formed thick plate products, and the rest diffuses into the air or falls on the ground, causing serious waste , pollute the environment, and the cost of spraying is high;

[0009] 4) The process of spraying first before processing cannot be realized

If it is processed after spraying, the adhesion and ductility of the paint will be insufficient, and it will fall off during the process; and the bending degree (T-bend performance) of the thick plate sprayed with paint is generally 2T or above, and it requires 0T ( That is, after the thick plate is bent at 180°, it is completely closed together without gaps, and the paint does not burst or fall off) or 1T (that is, after the thick plate is bent twice at 180°, the outermost paint surface does not fall off and does not burst). The paint used in the spraying process cannot meet the requirements;

[0010] 5) For the existing spraying process, it is sprayed on the thick plate that has been processed. For the area with complex structure (such as corners, depressions, etc.) Spraying in areas with complex structures can be completed, resulting in uneven distribution of paint on the surface of thick plates, which affects subsequent use;

[0011] 6) With the spraying process, each manufacturer of thick plate products needs to set up a special spraying workshop, and the environmental protection treatment pressure is high;

[0012] 7) Most of the paints used in the existing spraying process are polyester paints or fluorocarbon paints. These two paints have poor aging resistance. After a long period of continuous sunshine, the surface of the thick plate will appear yellowing and discoloration;

[0013] 8) The existing polyester paint or fluorocarbon paint has poor high temperature resistance. When spot welding is used to continue processing or the temperature reaches 230°C, the paint on the surface of the thick plate will change color and crack;

[0014] 9) The thickness of the existing thick plates for spraying is mostly less than 1mm. If it exceeds 1mm, the paint will fall off during subsequent use.

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