what is corona treatment
Corona treatment is a kind of electric shock treatment, which makes the substrate surface have higher adhesion. After corona treatment, the cross-linking structure of the plastic surface layer is less than that of the inner layer, so the functional groups of the surface layer have higher mobility. Therefore, in the process of storage, many plastics suffer from the degradation of corona treatment effect. The migration of additives from the inside to the surface is also a factor that can reduce the surface energy and affect the adhesion,
The principle of corona treatment machine is to use high frequency and high voltage to discharge corona on the surface of the treated plastic (high frequency AC voltage up to 5000-15000 V / m2), and produce low temperature plasma, which makes free radical reaction on the surface of the plastic and cross-linking of the polymer.
