The use of Corona treatment is an effective way to increase the surface tension of virtually any material. Corona treatment create an electrode spark, which passes through the substrate, increasing its surface energy. Oxygen molecules within the discharge area break apart and are free to bond to the ends of the molecules in the material being treated, resulting in a chemically activated surface. This method can be used on numerous substrates without damaging heat-sensitive plastics. The result is a surface unchanged to the naked eye, but one that is much more receptive to ink and other coatings.
In-line treatment is the best way to ensure that the surface tension is in the acceptable range at the time of printing. The value associated with corona treatment is called a dyne and a general aim point is a dyne level of at least 40 dyne/cm2.
Application
Common corona treated media
include polyethylene, polypropylene, nylon, vinyl, PVC, PET, metallic surfaces, paper,
Application
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