iPLASMA for UV and Water Based Lamination
Solvent based adhesives have been commonly used in lamination for many years. In the search for alternatives, certain challenges have arisen. Where solvent based lamination typically needs lower surface energy, and benefits from the Oxygen-based chemistry, UV and water-based lamination have different demands, because they need a higher surface tension, and a different surface chemistry.
The solution has always been chemical: either by priming the material, or changing the chemistry in the adhesive so it could adhere to the material. This is expensive, and in most cases harmful to the environment and the machine operators using these solvent adhesives.
iPlasma solves these problems by changing the molecules on the surface to Nitrogen-based instead of Oxygen-based. The result is a higher dyne level and extremely good adhesion. Polypropylene substrates are typical of what are considered difficult materials to treat. But, as shown on the graph, 60 dyn/cm can be achieved on raw untreated BOPP, a widely-used product that cannot be laminated with water or UV based adhesives, if purchased without primer.
iPlasma is the most cost effective solution for UV and water-based lamination. Tuning the exact chemistry to the specific application completely removes the need for primer, and therefore removes the issues of films losing transparency, or becoming mid-coloured because of the primer.
iPLASMA for Thermal Lamination
Thermal lamination is widely used with a variety of materials. Previously, the majority of applications were with paper or board, so the need for surface adhesion had less of a focus.
Today, a wide variety of special printed products using all types of print technologies, Flexo, Offset and Digital, mean that products have a large printed area. These include thick layers of ink, intense colours, and paper with a high moisture content. To laminate successfully on these printed products requires surface treatment. In many cases, Corona treatment is sufficient, but where high ink coverage combines with materials that are difficult to treat, iPlasma can be the right solution.
iPlasma treats both the film and the printed areas to very high dyne levels (72+ dyn/cm) and create specifically tuned chemistry that matches the adhesives used in the thermal lamination process.