The adhesion of coatings is influenced by factors such as surface tension, viscosity, rheological properties, and viscosity of the coating material. The adhesion of coatings is mainly influenced by factors such as surface tension, viscosity, rheological properties, and viscosity of the coating material. If the viscosity of the coating is too high, it will make it difficult for the coating to flow and wet the plastic surface, thereby affecting adhesion. At the same time, the solvent content and volatility in the coating can also affect the adhesion. Excessive solvent evaporation can cause the coating to dry quickly, reducing the adhesion with plastics.