What is metal powder coating? What are the advantages of metal powder coating technology?

Metal powder coating The working principle is almost the same as that of ordinary liquid electrostatic spraying, except that powder coating is dispersed instead of atomized. It is a coating sprayed with an electrostatic powder spray gun, which makes the powder particles negatively charged while being dispersed. Under the action of airflow and electrostatic attraction, the charged powder particles are coated on the grounded coating, and then heated and melted to solidify into a film. Metal powder coating is the dominant powder coating method in the industrial painting field.

Since powder coating technology entered the coatings industry, the market share of powder coatings in general industrial coatings has increased year by year, thanks to the unique advantages of metal powder coating.

1. Reduce the degree of environmental pollution. After long-term research and experiments, it has been found that Metal powder coating "is currently a very clean coating technology that can be achieved. The powder is a pure solid coating that can be fully automatically sprayed. Large or excessive amounts of sprayed powder can be easily collected by the recovery system for recycling. Therefore, the utilization rate of powder coatings can be almost as high as possible, which enables the coatings industry to reduce the cost of waste treatment and the degree of environmental pollution.

2. Good economic benefits. In the composition of the film formation, the solvent type accounts for about 60%~65%, while the efficiency of powder coating can reach almost the highest level, and the powder not attached to the coated object can be recycled. In general, the application of metal powder coating technology can make the coating work as economical and efficient as possible. In Metal powder coating operations, if there are poorly sprayed areas, they can be blown off with an air spray gun before baking, and then recoated. Therefore, the phenomenon of surface paint sagging can be avoided, greatly reducing the probability of repainting rework. Since metal powder coating uses electrostatic spraying operation, the coating equipment can be almost fully automated, saving human resources. Even if manual assistance is required, coating personnel do not need long-term training to master the operation skills.

3. Energy saving. Since the powder does not produce organic volatiles, it avoids waste caused by volatilization into the atmosphere, so it greatly reduces energy costs compared with liquid coatings. Metal powder coating equipment can obtain a thick film with one spray, without repeated spraying or priming, which is faster and higher than coatings with the same film thickness. The coating equipment does not require static time, saving equipment space. In addition, the baking time of powder coatings is shorter than that of liquid coatings, so it can greatly reduce fuel energy consumption, shorten the coating line, and improve production and efficiency.

4. Excellent coating performance. As long as the powder coating is directly sprayed onto the surface of the pre-treated medium-density fiberboard and baked, a coating surface with excellent performance can be obtained. Generally, powder coatings have lasting performance, including wear resistance, impact resistance, adhesion, toughness, corrosion resistance and chemical resistance. In addition to the above advantages, outdoor powder coatings also have high weather resistance and pollution resistance. Metal powder coating can obtain a high-thickness coating film at one time, and the film thickness can be between 50-300m. When the solvent coating is thicker, there is no dripping or stagnation phenomenon.

5. Gold powder coating technology appeared in the 1960s and is mainly used for metal surface coating. At the end of the 1990s, with the development of powder coatings and spraying equipment, it became possible to apply metal powder coating technology to non-metal surfaces.