Corona treatment technique is a surface modification system. This system used to optimize the adhesion properties of the material and to ensure bonding with inks, coatings, and adhesives. A high-frequency charge provides an efficient way of increasing the adhesion and wettability of a plastic surface.
How is corona treatment measured?
Corona treating systems achieve this by applying a given level of power over a certain period of time to the surface. This power/time parameter is measured in watt density, which is defined as watts/ft2 (or m2)/minute.
How does corona treatment work?
How does corona treating work? The material being treated is exposed to an electrical discharge, or “corona.” Oxygen molecules within the discharge area break into their atomic form and are free to bond to the ends of the molecules in the material being treated, resulting in a chemically activated surface.
How long does corona surface treatment last?
When treating paper with Corona you will get the benefits of cleaning the surface and removing any unwanted paper fibres that could create pin holes during the coating process. The treatment level lasts for a minimum of six months.
Why corona treatment is used?
A corona treating system is designed to increase the surface energy of plastic films, foils and paper in order to allow improved wettability and adhesion of inks, coatings and adhesives. As a result, the materials treated will demonstrate improved printing and coating quality, and stronger lamination strength.
What is a corona generator?
The generator is the power source. Consisting of a high frequency generator and a high voltage output transformer, the purpose of the generator is to supply a sufficient amount of power to the treater station to generate a corona.
How long does flame treatment last?
A Flame Treating process consists of exposing the surface to a suitable oxidizing flame for a period in the range 0.2 to 3.0 seconds.
What is corona treatment in lamination?
How does corona treatment increase surface energy?
A corona treatment is used to increase a material’s surface tension in an effective way. By treating the material with a high frequency corona discharge, its surface becomes much more receptive to adhesives, inks and coatings.
What is corona treatment in BOPP film?
The corona discharge treatment can transfer energy onto the surface of BOPP film and cause the crack of chemical bonds, which can react with nitrogen to form the nitrogen functional groups under oxygen atmosphere.
