Corona Surface Treatment
To obtain optimum adhesion when printing, laminating or coating we need to increase the surface energy of the substrate. Corona surface treatment is a cost effective way to achieve this by using a known and trusted technique
Corona Treaters
for a digital age
With digital print & finishing technologies becoming more widely used, the need for surface treatment has grown significantly. Surface treatment processes are essential to ensure optimal adhesion, color vibrancy, and longevity of printed materials.
Corona Treaters
for Converters
Corona treatment raises the surface energy of substrates. However due to migration of additives to the substrates surface during storage, the corona effect can be reduced within hours, weeks or months, depending on storage conditions. When printing one must ensure that the dyne level of the substrate is high enough to promote adhesion of the inks onto the substrate, otherwise this can lead to disastrous consequences. To ensure this adhesion, it is highly recommended that flexographic and rotogravure printing presses have a corona treater installed.
Likewise, in the lamination process the surface energy of one substrate must be higher than the other substrate to promote adhesion and avoid delamination.
Corona Treaters for
film manufacturers
Blown film extrusion usually requires a corona treater to treat both external faces of polyethylene film (although polypropylene can also be treated). Corona treaters by Corona Supplies allow for guaranteed dyne levels, even at high slip additive levels, using a variety of easy to use and safe to operate designs.
Corona power supplies
Corona Supplies supply variable frequency, IGBT, Power Supplies from 0.3kW to 20kW. Power Supplies from 4Kw to 20KW are based on tried and tested Sherman Treaters reactive power generators, but are now available with an optional integrated touch screen interface offering greater control and diagnostics.
Ozone elimination
One of the by products of corona treatment is ozone (O3), which is a highly toxic and corrosive oxidising agent and major danger to health.
This gas is both harmful to man and machine and as environmental laws become tougher on emissions of gases from a production hall, the question of the ozone from the corona becomes equally important.
Corona Supplies manufactures ozone destruct units using catalysts to convert ozone to oxygen and guarantees exit levels < 0.1 ppm of ozone, the recommended exposure limit to humans.
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