Advantages and disadvantages of powder coating and traditional coating

　　Generally speaking, the advantages of powder coating: no solvent, no volatile organic compounds due to pinhole problems, it is difficult to obtain ultra-thin coating (thickness less than 1.0 mil) the exhaust gas from finishing room can be returned to the coating room, which can reduce the frequent color change of the exhaust gas from the outside of the oven, The overspray powder that will increase the shutdown time by about 98% can be recovered and reused for storage and treatment. Special climate control is required without drying or flashing time. The parts to be coated can be arranged more closely to match the color and the color is slightly difficult to be liquid.

　　coating

　　The uniformity of coating thickness suitable for continuous and automatic process is sometimes difficult to maintain the coating does not flow or drip, which can reduce the rejection rate of temperature sensitive parts. The construction personnel with high curing temperature of some powders and the minimum training and supervision of sharp corners are difficult to obtain the thicker coating, which can be easily converted from the liquid coating process to the powder coating process. The expensive production capacity / output is high Due to Faraday cage effect, the thickness of inner corner coating is thin, cleaning and maintenance are simple

　　1. Reduce environmental pollution

　　2. Energy saving

　　3. Excellent coating performance

　　4. Considerable economic benefits

　　1. Reduce environmental pollution

　　With the environmental protection law more and more strict on the content of VOC in the atmosphere, the coating industry seeks various ways to improve the coating technology to reduce environmental pollution. After a long period of experiments and tests, it is finally found that "powder coating" is the most ideal coating technology that can be achieved at present.

　　The powder coating does not use volatile solvents such as organic solvent and water, so the powder coating is an inorganic solvent type coating, which greatly reduces the potential safety hazards caused by solvents, such as organic solvent poisoning events caused by the operators due to the presence of organic solvent; or fire caused by organic solvent. Since the powder coating appeared in the 1950s and 1960s, there has been no major safety accident caused by powder coating.

　　Powder coating is 100% solid powder coating, fully automatic spraying can be used. Excessive or super spray powder coating can be recycled through the recovery system device, so the utilization rate of powder coating can reach nearly 100%, which can reduce the disposal of waste in the coating industry and reduce the degree of environmental pollution to the minimum.

　　2. Energy saving

　　Looking at the energy cost of powder coating and liquid coating. Liquid coatings contain Organic volatiles, which cause volatilization of volatiles to the atmosphere; while powder coatings will not waste this kind of energy, which greatly reduces the use of electrostatic coating machine with a large amount of discharge and one-time spraying can get thick film, which does not need to be repeated spraying, nor primer. Under the same film thickness, the coating operation with powder coating is relatively rapid Save time and cost.

　　Setting time is not needed in painting equipment, which can save equipment space. In addition, the baking time of powder coating is shorter than that of liquid coating, which can greatly reduce fuel energy, shorten coating line, improve production capacity and promote the efficiency of overall production.

　　3. Excellent coating performance

　　As long as the powder coating is directly sprayed on the iron or aluminum materials that have been properly pretreated, the coating surface with excellent performance can be obtained after baking, such as the durability of the coating, including: abrasion resistance, impact, adhesion, toughness, corrosion resistance and chemical resistance. In addition to the above advantages, the powder coating for outdoor use also includes high weather resistance and pollution resistance. Especially for the thicker coating, the powder coating can reach 50-300 μ m at a time, and has good leveling property, so it will not drop or accumulate when the solvent coating is thick.

　　In order to improve the multi-function of powder coating, we can adjust the color, luster and surface flatness according to the customers' preferences, even special metal powder coating and some special wrinkle powder coating.

　　4. Considerable economic benefits

　　Due to the electrostatic principle of powder coating, the coating equipment can achieve full automation without wasting human resources. Even if manual assistance is required, the coating personnel can spray a good coating without long-term training. Powder coating is 100% solid composition and no need to add any solvent, saving packaging and storage space. In the process of spraying, if there are poor spraying parts, they can be blown out by air gun before baking, and then sprayed on. Therefore, it is unlikely to have paint flow and dripping on the surface, thus reducing the probability of recoating and reworking. In the composition of the coating, the solvent coating is about 60-65%, while the powder coating can reach almost 100%, and the powder which is not attached to the sprayed object can be recycled. Generally speaking, the use of powder coating technology can improve production efficiency and economic efficiency.