Plastic film surface corona treatment, the bigger the better?
With our experience and Shun packaging, plastic film on the surface of the corona treatment is not better, if the surface treatment of plastic film spark is too large, will make the surface film breakdown, aging, luster faded, heat sealing performance of adhesion, strength reduction or inner film variation, is not easy to seal.
The surface tension requirement of the general printing processing film is 38 42dyn; the surface tension of the composite processing film is required to reach 42 -54dyn; the surface tension of the film processed by vacuum aluminizing is not less than 42 50dyn.
