Influence of too smooth surface grinding of sheet metal on film pasting

If the surface of sheet metal is polished too smoothly, it will have a bad influence on the film.

In the process of sheet metal surface polishing, if the polishing is too smooth, the surface will become very flat and smooth, which will adversely affect the adhesion of the film. Because the film needs a certain surface roughness to have good adhesion, and the surface is too smooth, the film will be difficult to adhere to it, leading to problems such as falling off.

Pay attention to the surface roughness when grinding sheet metal, and the surface roughness is the most suitable between Ra 0.2 and Ra0.2-0.8. The surface is too smooth, so chemical treatment can be used to increase the roughness of the surface. In addition, the surface needs to be cleaned and degreased before sticking the film to ensure the cleanliness and roughness of the surface meet the requirements.