Plasma Surface Treatment to Promote Sealing Adhesion Stability on Car Paint

Aiming at the frequent degumming problem of door seals, the adhesion behavior of the acrylic foam adhesive on the paint surface of the seals was studied through floating roller peeling experiments under different working conditions. It was found that after heating at 70 ℃ for 5 minutes, the adhesive force of the tape on the surface of 2K varnish decreased from 40 N/cm to below 5 N/cm, indicating that the acrylic foam tape had a higher risk of degumming on the surface of 2K varnish under high temperature stress conditions. The modification of the car body paint adhesion was carried out by plasma treatment under different process parameters, and the adhesion modification effect of the car body paint was studied through the surface energy test and floating roller peeling test. The study shows that the plasma surface treatment can effectively improve the adhesion stability of the sealing strip on the paint surface. Also, under the process of power 500 W, spray gun distance 8 mm, and processing speed 100 mm/s, the body paint achieves the best adhesion modification effect. Furthermore, under this process parameter, the samples of varnish surface treatment are cohesive destruction under all working conditions. In addition, the paint surface maintained the adhesion effectiveness for one week after plasma pretreatment.