powder coating common problem and solution

Now powder coating in the paint industry is becoming more and more important. However, China has not yet a series of powder coating national standards, industry standards, there is only one of the standards for paint. What kind of product is high quality powder coating product? What kind of quality is inferior product? Can't depend on, this also is to cause the disorder competition of 

Chinese powder paint industry is an important reason. For more prominent environmental issues, as soon as possible to develop standards in line with international standards, to avoid in the international market by the "green barriers" restrictions.

There are always some problems in powder coating in the coating, and the main problems include what, what is the solution? First, the paint film discoloration causes: 1, the coating surface has residual treatment liquid. 2, over baking, or in the furnace with volatile gases. 3, the construction of the powder mixed with other colors. 4, the powder itself is not resistant to high temperature paint or resin. Solution: 1, improve the pre-treatment method. 2, the 

development of appropriate baking conditions, purification baking oven. 3, strengthen the construction before the clean-up. 4, the replacement of qualified powder coating. Two, the surface of the film has a particle in one's heart: 1, is coated with the surface of the workpiece is not clean. 2, the powder is uneven, spray gun is not good. 3, powder is too fine or powder wet knot group, so that the spray gun powder. 4, the painting scene is not clean or spray 

room with powder dripping. 5, the recovery of the powder or the poor quality of the powder itself. Solution: 1, improve the quality of the workpiece at the end of the strengthening of the former 

treatment. 2, adjust the air pressure, check the deflector, adjusted to the optimum point. 3, to control the particle size distribution, the safekeeping of powder, to prevent damp. 4, clean up the scene, purify the air. 5, the recycling of powder after screening new powder mixed use, replace the qualified powder. Three, shrinkage, causes: 1, the surface of the workpiece oil. 2, compressed air, water, oil, etc., lead to pollution of the powder. 3, contaminated by 

dust or other impurities. 4, powder coating itself has pollution. Solution: 1, strengthen the former treatment. 2, to strengthen the purification of compressed air before painting. 3, to clean up the environment, to replace the qualified powder. Four, flow adjustment or peel seriously, cause: 1, workpiece surface roughness. 2, the powder particle coarse, damp or powder flow 

level itself is poor. 3, curing temperature is high or low. 4, the film is too thin or too thick. 5, workpiece grounding. 6, different powder mixed. Solution: 1 improve the workpiece finish. High quality powder flow flat 2 good choice of uniform size distribution, moisture and prevent powder. 3 adjust the appropriate curing conditions. 4 control the thickness of the powder in 60-80 M. 5 

regular cleaning rack. 6 before the construction of strict clean spraying system and site, avoid the powder mix different types or different manufacturers. Five, the surface of the film lost light, resulting in: 1 the end of the poor quality of processing. 2 the baking time is too long or the temperature is too high. 3 volatile gases in the furnace. 4 recycling powder using a large proportion. Two 5 different properties of powder mixed. 6 powder coating quality difference. Solution: 1 select the appropriate pre-treatment process. 2 adjust the appropriate curing conditions. 3 purification oven. 4 after the recovery of the powder and the new powder 

mixed with <30% as the appropriate. 5 for cleaning thoroughly before powder spraying system. 6 replacement of good quality powder.