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What are the specific advantages of electrostatic powder coating?

The working principle of electrostatic powder spraying is almost the same as that of ordinary liquid coating electrostatic spraying, except that powder spraying is dispersed rather than atomized. It is a coating sprayed with an electrostatic powder spray gun, which disperses the powder particles while carrying a negative charge. Under the action of airflow and electrostatic attraction, charged powder particles are coated on the grounded coating, and then heated, melted, and solidified into a film. Electrostatic spraying is the dominant powder coating method in the industrial coating field. Let's take a look at the advantages of electrostatic powder spraying.

1. Reducing environmental pollution: With the increasingly strict regulations on the content of volatile organic compounds in the atmosphere under environmental protection laws, the coating industry has been trying to develop a more environmentally friendly coating technology. After long-term research and experimentation, it has been found that "electrostatic powder spraying" is currently the cleanest coating technology that can be achieved. Powder coating does not use volatile solvents such as organic solvents and water. It is an inorganic solvent based coating that greatly reduces the pollution hazards caused by solvents, including operator poisoning incidents caused by organic solvents; Organic solvents also do not cause fires. Since the emergence of powder coatings, there have been no major safety accidents caused by powder coatings. Powder is a pure solid coating that can be sprayed completely automatically. A large amount or excessive spraying of powder can easily be collected by the recycling system to achieve the purpose of recycling. Therefore, the utilization rate of powder coatings can almost reach 99.9%, which reduces waste disposal costs and lowers environmental pollution in the coating industry.

2. Good economic benefits: The solvent based composition of the coating is about 60% to 65%, while the efficiency of powder coatings can reach almost 99.9%. The powder that does not adhere to the coated object can be recycled. Overall, the application of powder coating technology can make coating work as cost-effective as possible. In powder coating operations, if there are areas with poor spraying, they can be blown off with an air gun before baking and then repainted. Therefore, it can avoid the phenomenon of surface paint sagging and greatly reduce the probability of repainting and rework. Due to the use of electrostatic spraying in powder coating, the coating equipment can be almost fully automated, saving human resources. Even if manual assistance is required, painting personnel can master operational skills without long-term training. The powder is 99.9% solid and does not contain any solvents, thus reducing the amount of coating, saving packaging, and reducing storage space.

3. Energy saving: Powder coatings do not contain organic volatiles, avoiding waste caused by volatilization into the atmosphere. Therefore, compared to liquid coating, it greatly reduces energy costs. The electrostatic powder spraying equipment can obtain thick films in one spray, without the need for repeated spraying or priming, which is faster than coatings with the same film thickness. Painting equipment does not require static time, which can save equipment space. In addition, the baking time of powder coatings is shorter than that of liquid coatings, which can greatly reduce the consumption of fuel energy, shorten the coating line, and improve production yield and efficiency.


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