powder coating knowledge

Powder coating is a new type of material based on petroleum and chemical industry, with low 

molecular weight of resin, auxiliary agent, pigment and filler, under certain conditions, 

after curing, it has a certain appearance, gloss, color. Based on a lot of external 

factors, the coating has a lot of performance. When an object such as an outer shell of the 

air conditioner, building profiles after powder coating placed outside the natural 

environment, the film must be the intrusion of various factors, like the sun, rain erosion, 

after a period of time coating will occur a series of changes, can be expressed as sheen 

reduced, colors dim, coating surface rust spots or cracks, began to slight powder... Once 

the powder coating is solidified, the low molecular resin is turned into a super high 

molecular weight polymer by chemical crosslinking, so that it has a series of properties 

such as elasticity, toughness, chemical resistance and so on.

Powder coating is divided to part: a set of electrostatic powder spraying system is mainly composed of a powder supply device, a set or several sets of electrostatic spray gun and a control device, electrostatic generator (the usual configuration in the electrostatic spray gun inside) and a recovery device for powder composition. In powder feeding device of powder in a fluidized 

state, which is realized by compressing the air. Then the powders by siphon action is to 

speed the flow of the flow, formation of powder mixture, after Vuncheri powder pump, the 

power conveying pipe, eventually reaching the gun. A static generation device for 

generating high voltage, low current that is located in the front of the gun needle 

electrode in the air discharge, when the powder gun head nozzle, powder particles took 

charge, dual role by electrostatic adsorption and air transport reach has grounded surface.

Powder coating storage method: keep away from fire, avoid direct sunlight, should be placed in ventilated good, temperature in less than 35 DEG C places; avoid storage in susceptible to water, organic solvent, oil and other materials contaminated sites; paints with not optional dew in the air, shall from time to time and cover or turn to close the bag to avoid mixed with debris; avoid skin long-term contact, attached to skin powder apply soapy water rinse clean, do not use solvents. Safety of painting construction site. Coating methods of getting: coating operation and use of equipment are well grounding to eliminate static electricity; avoid coating machine unprovoked discharge phenomenon; spraying chamber, floating dust concentration try to control under the safe concentration, avoid the risk of fire or explosion dust.