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Plasma vs Corona Treatment

Corona vs. Plasma Treatment

For more than 30 years, 3DT LLC has been a leading provider of specialized corona and plasma surface treatments for customers around the world. Our state-of-the-art systems can be used as stand-alone stations, incorporated into new and existing production processes, or integrated into fully or semi-automated production lines. With 3DT’s 2- and 3- dimensional treating systems and a wide variety of custom configurations, we have a solution for virtually any application. In addition to manufacturing our cutting-edge equipment, we offer services such as design, manufacturing, product handling, installation, training, and maintenance service.

One of the more common questions we field about electrical surface treatment is, “What is the difference between corona and plasma treatment?” and then, “What best fits my application?” Both corona and plasma treatment increase the surface energy of numerous materials improving the adhesion of inks, adhesives, coatings, and other agents. However, they both have unique properties that require consideration in terms of applications.

In this post, we discuss the advantages and uses of corona treatment vs. plasma treatment, to aide in your understanding. However, our sales team will actively guide you in selecting the best system for your material, process and application.

This blog discusses the differences between corona treatment and plasma treatment, including how they work and the various systems that 3DT offers.

What is Corona & Plasma Treatment?

multidyne corona treatment

How Does it Work?

Corona and plasma treatment are both forms of electrical surface treatment. They use the power of electrical energy to change the chemical properties of material placed within an energy stream. This stream of electrically loaded molecules causes an intensified reaction with the material resulting in better wettability and stronger bonding traits. Electrical surface treatment is highly suitable for three-dimensional polymer parts, thin film, rubber profiles, glass labware, metal parts, coated paperboard and thicker materials such as foam and solid sheets of material.

When this phenomenon is contained inside an electrically grounded chamber, an air stream can be introduced to this chamber to force the plasma outwards in a controlled fashion and onto materials in a process called plasma treatment or atmospheric plasma treatment. However, when an insulator is placed between the two electrodes, the avalanche effect is avoided and the result is a cloud of ionized air. This ionized air – Corona Discharge – can now be used for the surface treatment of a wide number of materials that show poor or no adhesion properties to media such as printing inks, adhesives, etc.

What’s the Difference Between Corona & Plasma Treatment?

Plasma discharge has a relatively narrow treating width but is capable of imparting enormous surface energies onto substrates. The plasma treating heads can also be quickly mounted onto existing lines with little setup. The plasma discharge is virtually potential-free so it can be used to treat conductive materials. Plasma also produces no ozone gas which is a natural byproduct of the corona process. Alternatively, corona discharge typically imparts less surface energy but can treat very large areas. Corona treatment also has the advantage of being able to treat inside parts or in the recesses of 3-dimensional parts.

Our Most Popular Treatment Systems

3DT designs and manufactures an extensive range of cutting-edge surface treatment products, including:

multidyne MultiDyne™

3DT’s MultiDyne™ corona treatment system creates optimal surface tension, or wettability, on a broad range of parts and materials. A highly repeatable and controlled process, MultiDyne™ is typically used to prepare blow molded, injection molded, and extruded parts and products. MultiDyne™ creates highly effective, uniform adhesion on surfaces for printing, coating, gluing, and lamination.

MultiDyne™’s state-of-the-art corona discharge technology works by creating a short circuit between two high voltage electrodes. A constant flow of air between the electrodes facilitates even distribution of the corona field onto the surface of the treated material, creating a highly receptive adhesive surface. It is perfect for treating areas that are commonly a challenge for other surface treatments, including complex geometries, hard-to-reach areas, and metal-adjacent surfaces.

PolyDyne™

polydyne conveyer ceramic system for surface treatmentPolyDyne™ is one of 3DT’s most powerful corona treatment systems. This extremely dependable and reliable system is particularly useful in high-speed operations, such as printing, extrusion, assembly, and coating production lines. PolyDyne™ is exceptionally versatile and can be used to treat everything from the interior surface of needle hubs to automotive components. Using the latest technology, PolyDyne™ directs corona treatment with an exceptional degree of precision onto virtually any surface.

PolyDyne™ is specifically designed with flexibility in mind. All of our systems can be customized to meet the particular needs of your application, including custom electrode systems, ozone eliminators, and a variety of material handling systems. For more resistant materials, we are pleased to offer our PolyDyne Pro™ system.

PlasmaDyne Pro™

PlasmaDyne Pro™ uses a stream of highly ionized plasma to modify the chemical properties of the surface material within the stream. The surface becomes highly receptive to chemical bonding. PlasmaDyne Pro™ enhances the adhesion of ink and adhesive to a wide range of components, from plastic tubing and medical devices to rubber automotive seals. 3DT’s PlasmaDyne Pro™ is a compact and energy efficient system, with an optimized control unit, adjustable treatment levels, and modular replacement parts that allow you to tailor the system to your particular needs.

plasmadyne pro surface treatment

Premium Surface Treatment Systems by 3DT

At 3DT, we are committed to developing superior surface treatment systems for every industry.  We have spent decades at the forefront of corona and plasma technology and are dedicated to solving even the most complex adhesion challenges. To learn more about our surface treatment systems and related services, visit our product page, or contact our experts today.