The basic methods for the adhesion test of spray paint on the surface of plastic and metal materials are the 100 grid adhesion and the pull-off adhesion test. According to actual needs, there are a series of boiling, salt spray, bending, knife cutting, freezing, etc. test method. Paint adhesion is an important factor in the quality and effect of painting, if the adhesion of the paint will limit the function of the paint.
In the coating industry, the effective solution to the problem of poor adhesion of spray paint on plastic and metal surfaces is to spray the adhesion treatment agent between the substrate and the coating to improve the adhesion between layers to solve the problem of paint drop. The problem, the 100 grid adhesion test reached 5B.
