Topic: Plasma system for coil coating. Coil coating process without chemicals. Cleaning of aluminum sheets. Surface activation prior to corrosion protection coating and painting.
Plasma systems for the coil coating process – efficient ultrafine cleaning without chemicals or wastewater
An
example of the high efficiency of Openair®
plasma activation
is the manufacture of pre-coated sheets (coil coating). These sheets
are needed in the industrial production of household
appliances
and in the automotive
industry.
In
the coil coating process, metals strips are provided with a surface
coating or varnishing to achieve optimum protection against corrosion
and to simplify subsequent production processes. For long-term layer
and varnish adhesion, the aluminum sheets must first be completely
cleaned of rolling oils in an ultrafine cleaning process.
Grieser overall system
Openair® plasma pretreatment of sheetsOpenair®
plasma
removes all residues reliably and efficiently while activating the
material surface for optimal adhesion and a flawless finish. The
Openair® plasma treatment can be integrated inline directly upstream
of pretreatment in the rolling mill.
Moreover,
the dry plasma process is particularly environmentally friendly. The
large amounts of chemicals that would otherwise be required for
ultrafine cleaning are omitted entirely.
Also,
the time- and energy-intense drying processes necessary in wet
chemical solutions are no longer required.
Advantages of Openair® plasma systems for coil coating:
- High efficiency in the cleaning of aluminum sheets
- Surface activation prior to corrosion protection coating and painting
- Saving water, chemicals and wastewater
- Possibility of one-sided or two-sided pretreatment
- Variable nozzle configuration depending on the degree of contamination
- Cost-efficient inline integration
Partners & References
Griesser AGWorld premiere: Openair plasma in coil coating
Griesser AG in Switzerland was the first company in the world to achieve environmentally-friendly pretreatment of aluminum strip using Openair® plasma, which avoids the generation of thousands of tons of contaminated waste water annually.
Partners & References
NanoCraftCoil coating – test result: “very good”
At the request of customers, independent research company NanoCraft tested the systems developed by Plasmatreat.
