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Corona Treatment

Corona Treatment is available in more variations than we can say on here and also has a range of names such as corona discharge, corona surface treatment, dielectric barrier discharge and others.

There are common machines such as LabelTEC which is a web treater for inline treatment of films capable of narrow web treatment of less than 100mm, up to large format 2m machines. Other systems include treatment of foams, boards or sheets which can be much thicker than web materials which offers it’s own set of challenges.

Custom machines such as SyrinTEC and RotoTEC are for treatment of syringes and semi 3D components, while many more can treat specific components or even specific areas of parts. Often the more engineered solution, corona treatment is usually high speed, high performance and highly efficient.

Corona Treatment finds its home in many high speed and high performance applications and is most commonly found in printing applications and in the medical device industry. However, corona treatment isn’t limited to just medical device manufacturing and printing and is a really strong technology for treatment of many materials and components!

The Corona Treatment Process

Corona Treatment uses high voltage to energise a material surface, priming and preparing it for adhesion of inks, adhesives and coatings.

Various materials can be used with corona treatment, with polymer films such as polyethylene and polypropylene being common for many years. Today, PEEK, aluminium foil, non-woven materials and fabrics can all be treated for improved product performance.

Thin web materials like polyethylene films have always been treated before printing on items such as plastics bags, but thicker materials such as foam and boards can also be treated for adhesion.

Corona treatment is perfect for flat and wide materials, but it also has a role to play in treatment of specific area components inline for items such as syringes and lenses which can be treated with high precision, high speed and very efficiently inline with automated production cells.

Corona is often the more engineered of the technologies, but it’s designed for some of the most challenging and demanding applications we work on.

High Frequency Corona Treatment Systems

Tantec are the world leading manufacturer of Corona Surface Treatment Systems which have been designed and manufactured since day one of the company in 1974. Corona discharge treatment is often the more engineered and bespoke systems so can come in hundreds of designs depending on the material, the geometry of the part, process speed, treatment intensity and integration/ installation requirements.

If Corona Treatment, sometimes known as dielectric barrier discharge treatment looks like the treatment system for you, make sure you speak with us as there’s always more to the technology than first meets the eye.

You can read about the systems and technology below, or you can visit Ebble.Shop to book in for testing, lab time or production time. You can also read more about our contract manufacturing site that uses corona treatment, Ebble Manufacturing.

A few of the key systems we manufacture include:

LabelTEC Web Corona Treatment

Designed for the pretreatment of conductive or nonconductive narrow webs, our LabelTEC Corona Surface Treatment Systems can accommodate a variety of materials with widths of between 50mm-500mm. They treat either one or both sides of the web and run at production speeds up to 250m/min. LabelTEC systems are ideal for priming materials ahead of laminating or printing processes. Wider systems are available, but move from simple bolt on, cantilevered systems to larger installations.

Foam and Board Corona Treating: FoamTEC and SheetTEC

Larger Corona systems include the FoamTEC and SheetTEC systems, which can treat foams and sheets which can be thick or delicate and have large widths. Foams for example, with their varying surface finish can be damaged easily if not treated right. Equally, fixed sized boards require specific handling to ensure they’re treated correctly from edge to edge, front to back.

These systems can be installed into more complex production environments, such as coating lines, or they can be stand alone systems manually loaded and unloaded.

Specific Part Corona Treatment: RotoTEC and SyrinTEC

Treatment of 3D components such as syringes, lenses or bottles generally uses versions of the RotoTEC or SyrinTEC systems, which are designed to work with a conveyor line, or a jig and rail inline set up. This way, a part or bank of parts can come along a line and pass through the treatment area as the parts move on to their next stage with speed matching the rest of the process.

These processes can also be offline, treating parts manually loaded, or presented via a rotary table or bowl feeder. RotoTEC and SyrinTEC are often used for coating adhesion, label application or print adhesion, especially for safety critical print.

Low Frequency Corona - SpotTEC

Our low frequency system, SpotTEC, is a cost effective solution, ideal for parts, usually running up to 30m/min. The SpotTEC nozzle based system can run up to 65mm wide per head and requires little engineering to install in to most production lines.

Our innovative SpotTEC systems blow a high-voltage discharge towards the substrate surface in a similar way to Atmospheric Plasma. Commonly used for the treatment of cables, profiles and injection moulded parts, they are easily integrated into extrusion lines or in to automated systems such as robot applied treatment. They’re an excellent pre-treatment option with low investment and running costs.

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