iPLASMA for UV and Water Based Printing
Where solvent based printing typically needs 38 or 40 dyn/cm, the surface tension requirement for UV and water based printing is typically higher, between 44 and 50 dyn/cm.
For some materials, Corona treatment can reach these targeted dyne levels, and in those cases Corona is still the most cost efficient solution. However, some materials are more difficult to treat, and cannot be successfully use Corona to reach the requisite dyne level.
Previously, the solution had been to use chemicals: either by priming the material, or changing the ink chemistry so it could adhere to the material. This is both expensive, and in most cases harmful to both the environment and the machine operators using the liquid solvent primers.
iPlasma solves these problems by changing the molecules on the surface to nitrogen-based instead of oxygen-based. The result is higher dyne levels and extremely good adhesion. Polypropylene substrates are typical of difficult to treat materials, as shown on the graph, but 60 dyn/cm can be achieved on raw untreated BOPP, a widely-used product that cannot be printed with water and UV based inks, if purchased without primer.
iPlasma is the most cost effective solution for both UV and water based printing. Tuning the exact chemistry to the specific application completely removes the need for primer, and removes problems associated with changing the components of the ink, such as the ink drying on the printing plate.
iPLASMA for Digital Printing
Corona is ideal for applications where oxygen-based molecule groups on the surface increase the adhesion. But the ink used for digital printing needs a chemical connection to the surface that requires different chemistry.
Today, most digital technologies require the substrate to be coated with a primer prior to printing. This is done either by buying pre-primed substrates, or, with some of the digital presses having an inline priming unit prior to the print unit.
iPlasma can replace some of these primers by creating a similar chemical composition on the surface. This works like a gas-primer, making iPlasma far more cost effective, and removing the environmentally harmful liquid primer from the production floor. The result, is a lower production cost, and an improved working environment for the operators.