Why does car repair paint spray cause the surface of the paint film to be filiform
What are the reasons that can cause the appearance of the paint film to appear filamentous during the process of car paint spraying? The main reasons for the poor atomization and filamentous spraying of car paint during spraying are as follows:
(1) The viscosity of the coating is high, or the molecular weight of synthetic resins used in paint making (such as chlorinated rubber, acrylic resin, etc.) is relatively high.
(2) The selected solvent has insufficient solubility or the solvent evaporates too quickly during spraying.
(3) The resin content of easy drawing exceeds that of non wire spraying.
(4) Improper adjustment of spray gun, high spraying pressure.
To avoid this situation, we can adopt the following methods for prevention and control:
(1) Select the most suitable construction viscosity or solid fraction for the coating through experiments.
(2) Choose a solvent with appropriate (or strong) solubility.
(3) Use resins with uniform or low molecular weight distribution, adjust the coating formula, and reduce the content of easily drawn resin.
(4) Adjust the spraying pressure appropriately.
Article source: Automotive repair paint http://www.jinliangxincai.com
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