Due to the different characteristics of plastic materials used in automotive parts, there are the following process difficulties in the coating of plastic parts: firstly, the surface energy of the plastic substrate is low, which affects the adhesion of the paint film; Secondly, the thermal deformation temperature of plastics is low, and the heating temperature for paint drying and curing is limited; Thirdly, pollutants such as release agents used in plastic injection molding are difficult to clean, resulting in paint film defects such as shrinkage and even failure to form a film, affecting adhesion, etc; Fourthly, manual spraying is unstable, and there are certain difficulties in controlling film thickness and color difference

Generally speaking, ABS materials have a high surface and good paint adhesion, but their heat resistance is poor and their drying temperature is low; However, PP materials are relatively difficult to apply due to their low surface energy. Therefore, the type of paint used needs to be selected according to the type of substrate material. With the increasing proportion of plastic components in automotive manufacturing, the global process of automotive plasticization is gradually accelerating, and the coating technology of plastic components has also made significant progress. At the same time, the market has also put forward higher requirements for paint spraying technology. However, innovation comes from demand. I believe that under the guidance of high-tech, the automotive painting process industry will be able to achieve greater breakthroughs based on customer satisfaction and market demand, and continuous reform and innovation