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Why Does The Protective Film Have To Be Corona Treated
- May 28, 2018 -

Protective film Why do corona treatment?

The purpose of corona treatment is to change the surface energy of the protective film so that it is easy to bond with printing inks, coating materials and adhesives. For example, the PE film in the production will also have a structural state changes, in a few days, the polymer from amorphous change to crystal shape, thus affecting the corona treatment effect. After Corona treatment, the crosslinking structure of the plastic surface layer is less than that of the inner layer, so the functional group of the surface layer has higher mobility.

Therefore, in the storage, many plastics appear corona treatment effect of the decline, the additive from the interior to the surface of the migration, but also to reduce the surface can affect adhesion factors, this negative effect can not be completely suppressed.