Plasmatreat shows a plasma system that pretreats flat substrates prior to printing with UV inks or coatings. This system has eight rotating nozzles and will treat materials such as metal sheets for can production, before printing or painting.
With the rotating nozzles, a large-area of the metal surface is pretreated with plasma uniformly. Precisely matching the speed, the distance between the nozzle heads and the substrate, and the intensity of the plasma nozzle to the application in question is one of Plasmatreat's core competencies. The innovative system for this patented process can be excellently integrated into existing lines.
What is Openair-Plasma®?
Plasma is the name given to matter at a high, unstable energy level. Energy is input to matter via the solid, liquid and gaseous states. If additional energy can be pumped into gaseous matter by means of electric discharge, plasma is produced. In doing so electrons can leave their atomic shells and chemical bonds are broken. This results in the formation of free electrons, ions and fragments of molecules. This state, however, can scarcely be used at normal pressure on account of its instability. The jet system developed by Plasmatreat in 1995 made it possible to use this state on an industrial scale and hence to employ plasma inline.
Economical and environmentally friendly
The jets are operated solely by air, if need be with a desired process gas also, and high voltage. Depending on the jet geometry the emergent plasma is effectively available over a working range up to 25 mm wide and at a treatment distance of 40 mm. Rotary plasma jets cover a treatment width of up to 100 mm. Without any use of chemicals and without substantial intervention in existing process workflows innovative and low-cost surface treatments are implemented in production and all this is done without any adverse effects on the environment.
Key technology
Due to its broad range of potential applications Openair-Plasma® technology is numbered among the key technologies in surface treatment. Use of
the process greatly improves the level of quality of different products and product functionalities and in doing so a dependable process workflow is
guaranteed.
Technical limits overcome, more environmental friendliness achieved: Plasmatreat GmbH will demonstrate at METPACK 2023 in Hall 3 Booth 3C55 in close partnership with paint and coatings manufacturer Actega, and can manufacturer Brasilata, how the use of plasma technology is revolutionizing metal printing: The special technology for treating surfaces makes it possible to replace conventional solvent-based inks and varnishes by using digital printing with UV-curing systems. This not only protects the environment, but also makes processes more efficient.
The use of UV inks or coatings has many advantages for industrial processes: The fast curing saves time and also eliminates the use of ovens for the drying process. This results in significant energy savings compared to conventional curing systems. In contrast to solvent-based systems, the VOC values of UV-curing systems are significantly lower and thus have a positive impact on the environment. In addition, the lower space requirement, as well as faster production, has a major impact on production costs. However, the quality of printing UV inks, on metal, has so far been associated with limitations caused by inconsistent metal sources, variations in surface quality and lack of substrate cleanliness. This often resulted in insufficient adhesion of the ink to the metal surface, leading to high costs due to waste and poor quality.
Openair-Plasma - cleaned surfaces as a basis for UV inks
At METPACK 2023, Plasmatreat will be demonstrating how ultra-fine cleaning with Openair-Plasma solves this issue: It absolutely reliably removes impurities, e.g. undefined oxide or ultra-thin dust layers, as well as residual traces from the production process such as release agents and lubricants, cutting oils or drawing greases. This results in a pure metal surface where the existing surface energy in the substrate is restored. The high adhesion force that has now been created enables the surface to be fully and homogeneously wetted by UV inks or coatings, which now adhere optimally to the metal surface without the use of chemical adhesion promoters (primers) on the substrate. A plasma system is already implemented in the production process at can manufacturer Brasilata, with a correspondingly developed UV coating from Actega.
PlasmaPlus - further improved long-term adhesion
An enhanced effect can also be achieved with the PlasmaPlus nanocoating: To protect the printing on the metal from changing temperatures or other environmental influences, the ultra-thin PlasmaPlus PT-Print coating is applied to the surface immediately before printing, which also eliminates the need for chemical pretreatment or further priming of the substrate. The dry process allows immediate further processing and ensures long-lasting adhesion of the printing ink directly to the metal substrate.
Comprehensible demonstration on modern plasma system for flat materials
Visitors at the booth C33 in hall 3 at METPACK can experience this process live: A plasma system that pretreats flat substrates prior to printing with UV inks or coatings will be presented. This system has eight rotating nozzles and will treat materials such as metal sheets for can production, before printing or painting. With the rotating nozzles, a large-area of the metal surface is pretreated with plasma uniformly. Precisely matching the speed, the distance between the nozzle heads and the substrate, and the intensity of the plasma nozzle to the application in question is one of Plasmatreat's core competencies. The innovative system for this patented process can be excellently integrated into existing lines.
"Plasma is a real gamechanger in the metal can industry. We are opening the way to a significantly more environmentally friendly process for printing and coating metal packaging - with highly efficient processes," emphasizes Christian Buske, CEO at Plasmatreat.
Plasmatreat at METPACK 2023 from May 2-6, 2023 in Hall 3, Booth C33.
Plasmatreat is an international leader in the development and manufacture of atmospheric plasma systems for the pretreatment of substrate surfaces. Whether plastic, metal, glass or paper - the industrial use of plasma technology modifies the properties of the surface in favor of the process requirements. Subsequent processes include bonding, painting, printing or gasketing.
Openair-Plasma® technology is used in automated and continuous manufacturing processes in almost every industrial sector. Examples include the automotive, electronics, transportation, packaging, consumer goods and textile industry, but the technology, cost and environmental advantages of the plasma technology are used in medical technology and in the renewable energy sector as well.
The Plasmatreat Group has technology centers in Germany, USA, Canada, China, and Japan. With its worldwide sales and service network, the company is represented in more than 30 countries by subsidiaries and sales partners.
For more information, please visit: www.plasmatreat.com
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