What are the preparations and items before the conformal coating is sprayed?Like gloves, spray gun or spray machine is little.Many people will ignore a very important point, the circuit board cleaning and drying problems.This is why many customers report that after spraying conformal coating, small bubbles appear on the board, and some places are white, which may be said to be the quality problem of conformal coating.In fact, the cause of these reasons is not the conformal coating itself has a problem, but the circuit board is too wet or there are impurities caused by the board.Yoneng company suggests that when using conformal coating, it is very important to clean and dry the PCB board first. The following introduces the matters needing attention before spraying.
1: PCB board (circuit board) must be cleaned with cleaning agent, and dry, can also be dried in the oven.
2: if it is a conformal coating of the aerosol can, shake the bottle before spraying, so that the paint inside can be uniform, and then spray.
3: if it is sprayed by the coating machine, the viscosity of the conformal coating is deployed first, and then the coating machine is set up. The preparation work is fully prepared, and then you can start spraying operation. The thickness of the spraying can be determined according to your own needs.Three anti paint dry time in 10 to 30 minutes, the time of complete curing is generally about 24 hours.
4: in the process of spraying operation, there can be no fire source and heat source, pay attention to the relevant rules and regulations in production safety.
More conformal coating products and use process can be consulted to Shenzhen Yaoneng Company, can provide customers with conformal coating samples and technical support.