WHAT IS CORONA SURFACE TREATMENT?

Corona treatment is a surface modification technique that uses a low temperature corona discharge plasma to impart changes in the properties of a surface. The corona plasma is generated by the application of high voltage to an electrode that has a sharp tip. The plasma forms at the tip. A linear array of electrodes is often used to create a curtain of corona plasma. Materials such as plastics, cloth, or paper may be passed through the corona plasma curtain in order to change the surface energy of the material. All materials have an inherent surface energy. Surface treatment systems are available for virtually any surface format including dimensional objects, sheets and roll goods that are handled in a web format. Corona treatment is a widely used surface treatment method in the plastic film, extrusion, and converting industries.

 

WHY CORONA SURFACE TREATMENT?

Many plastics, such as polyethylene and polypropylene, have chemically inert and nonporous surfaces with low surface tensions causing them to be non-receptive to bonding with printing inkscoatings, and adhesives. Although results are invisible to the naked eye, surface treating modifies surfaces to improve adhesion.

It is safe, economical, and delivers high line speed throughout. Corona treatment is also suitable for the treatment of injection and blow moulded parts, and is capable of treating multiple surfaces and difficult parts with a single pass.

WHAT CAN BE TREATED?

Polyethylene, Polypropylene, Nylon, VinylPVCPET, Metalized surfaces, Foils, Paper, and Paperboard stocks are commonly treated by this method.

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