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Corona application
Corona treatment is known as dielectric barrier discharge. It is mainly used for surface treatment of
plastic film or plastic sheet. Before ink printing, laminating, blowing, coating, gluing, material
modification, polymerization, film metallization, casting and adhesions of the materials, in order to
make the surface have stronger adhesion (i.e. higher dyne level), and prevent the printing and gluing
from fading, dropping and other poor effects, it is necessary to use corona surface treatment.
Corona principle
OThe principle of the corona is to use high-frequency and high-voltage to generate corona between the
discharge electrode and the corona roller to form a low-temperature plasma area. Through air ionization
between the two medium, ozone is produced. Ozone is an oxidant, which can immediately change
the molecular structure of the plastic surface and make it from non-polar to polar. At the same time,
corona makes the surface of the material have small and uneven holes to rough the surface and enhance
the surface activity, after the surface tension is increased, so the ink, glue, etc. can deeply penatrate into
the material because of the treatment so it achieves the desired printing and gluing effects.
Features and advantages
* Corona treater is customized upon requirements, but the power control generator is almost the same.
* For non-conductive materials: PP, CPP, BOPP, PE, PET, HDPE, LDPE, PS, PI, PS, PC,
PA, PVC, ABS, non-woven, synthetic paper, cartons, sheets and other materials;
* For conductive materials: aluminum foil, metallized film, cartons, sheets and other materials;
* For special materials: all kinds of the special-shaped materials;
* Hefeng Corona adopts stable, advanced and reliable imported IGBT which are the main components to control, trigger and display circuits with digital display, It's safe, reliable, durable with minumum faults. It has automatic protection such as over-voltage overload, over-current, short circuit and shutdown functions which is the most common trend in the world.
Technical Parameters
Output power: 2-30 KW optional (optional CD500 / CG2000 series)
Input voltage: 220VAC/380VAC
Line speed: 5-400 m/min (customized upon requests)
Web width: 300-3000mm (customized upon requests)
Treated side: double side
Discharge electrode: metal electrode
Material: Non-conductive materials PP, PET, PE, PVC, etc.
Application: slitting, cast film, laminating, extrusion, coating machine, etc.