Causes of corona of polymer protective film

Why do polymer protective film wholesalers do corona treatment? The purpose of corona treatment is to change the surface energy of the protective film so that it can easily adhere to printing inks, coatings and adhesives. After corona treatment, compared with the cross-linked structure of the inner layer, the cross-linked structure of the plastic surface layer is reduced, so the functional groups of the surface layer have a higher mobility. Therefore, during storage, many plastics have poor corona treatment effects, and the movement of additives from the inside to the surface is also a factor that reduces surface energy and affects adhesion, so this negative effect cannot be completely suppressed. The corona treatment of plastic PE protective film is electric shock treatment, which can increase the adhesion of the substrate surface. The purpose of corona treatment is to change the surface energy of the protective film so that it can easily adhere to printing inks, coatings and adhesives. After some treatments in the manufacturing process, the protective film has better adhesion properties. Next: Understand the viscosity requirements and anti-breakage methods of polymer protective filmsPrevious: The corona principle of PE heat shrinkable film