When implemented by truly innovative integrations, CORONA technology can be considered one of the industry’s most attractive solutions at present. The expected levels of surface energy when treating large areas show a degree of efficiency that is at least identical to or even greater than that of certain rotating plasma torches What’s more, the investment costs are much more affordable and the production costs are lower (no compressed air, no wear, etc.).

CORONA electric discharge treatment is based on a tried, tested and proven technique. Using the corona effect, an electrical phenomenon well known to physicists, we considerably increase the wettability and adhesion coefficients necessary for good surface bonding, regardless of the composition and shape of your plastic substrates.

The CORONA surface treatment process is a preliminary phase that is particularly effective for pad printing, screen printing and digital printing, as well as for gluing, painting, coating, foaming, etc.


This reproducible, robust and cost-effective process perfectly fits the requirements of industrial applications in all branches. And energy consumption remains stable and under control regardless of whether the process is integrated into production line operations or installed on independent mobile units.

At STTS, we have adapted this CORONA technology to develop truly innovative solutions, some of which have been patented and are unique to the global marketplace !

Tell us what you need and we will advise you on the most suitable solution.


Principle : this solution is used for treating non-conductive, relatively thin materials (up to 6 mm thick), but on very large surfaces. The material to be treated is fed under a direct electrode. The treatment is applied to the ionised area. This technology requires a counter-electrode (mass cylinder or mandrel) positioned on the other side of the area to be treated and acting as a ground plane.

Use : non-conductive parts, sheets, films or plates up to 6 mm thick.

Applications : printing on advertising bags, food wrapping and packaging, labels, electric wires, cups, syringes, lids, tubes or sleeves, lamination of single- or double-sided adhesive foam, solid sheets, etc.

Principle : this solution is used for treating wholly or partially conductive materials. The material is fed under a ceramic electrode. The treatment is applied to the ionised area. The ground plane can either be the part itself or a conductive substrate.

Use : any carbon or metal substrate, regardless of its degree of conductivity.

Applications : carbon profiles for the automotive industry, epoxy coated metallic panels, thin polymer parts on metal lines, metallised films for decorative purposes, etc.

Principle : this solution is applied when a counter-electrode cannot be used due to the shape or thickness of the material. This technology is based on a discharge blown onto the substrate to be treated. However, given the low implementation frequency, this solution should only be used when the surface energy level or the production rates are quite low.

Use : flat or hollow surfaces, raised simple or complex parts, profiles.

Applications : seal gluing, inkjet marking, sealing, hot-transfer printing, home appliances, automotive parts, connectors, packaging, eyewear, toys, etc.


INNOVATION : the efficiency of CORONA classic on non-conductive materials without a counter-electrode!

Principle : this solution is used for non-conductive substrates or parts, regardless of their thickness and especially their width. The material to be treated is fed in front of the EFFLUVAGE INDIRECT® electrode discharge. Any area which passes through the ionised environment is automatically treated with a very high frequency discharge. No ground plane is needed.

Use : flat or slightly raised surfaces with no restrictions in terms of thickness or width.

Applications : cosmetic parts (lids, caps, tubs, etc.), pharmaceutical and medical parts, automotive parts (interior, exterior, under-hood), aeronautical products (composite materials, profiles, etc.), polypropylene panels for cleanrooms and industrial buildings, home appliances, foams, honeycomb panels and PP/PVC door panels, advertising items, etc.

INNOVATION : simultaneously activate and functionalise a plastic film to make it anti-static or anti-block!

Principle : this solution can combine the functionalisation of a film during its CORONA treatment. The innovation lies in the fact that the substrate is functionalised by solutions diffused in an aerosol while being fed under the CORONA discharge (the chemical elements suspended in the air are grafted by the CORONA discharge).

Use : activation and functionalisation of films (to prepare them for anti-misting, anti-static, hydrophilic, hydrophobic, anti-adherent, etc. properties).

Applications : manufacturing of “smart” food-grade films (the packaging reacts once the food is out of date), anti-static or anti-block functional films, etc.