What is corona treatment machine?
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 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.
What is corona treatment plastic?
Corona treatment (sometimes referred to as air plasma) is a surface modification technique that uses a low temperature corona discharge plasma to impart changes in the properties of a surface. Corona treatment is a widely used surface treatment method in the plastic film, extrusion, and converting industries.
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.
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 extrusion?
Corona treaters increase the surface energy of films, foils, and paper to improve wettability and adhesion of inks, coatings, and adhesives. Film extruders use corona treaters to increase a film’s surface energy at the time of extrusion.
What is corona treatment in lamination?
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.
Is surface tension the same as surface energy?
We usually use surface tension when referring to liquids and surface energy when referring to solids, but in reality they are the same thing. Surface tension and surface energy are important because they are measurable numbers that tell us how strong the attraction between molecules is.
What is corona treatment film?
The Corona Treatment method is widely used nowadays to increase the surface tension of the films. The Corona Treatment of plastic film is done by passing the film through the corona discharge created between electrode and dielectric covered ( ususally Silicone Rubber Sleeve) earthed roller as shown in Fig.
What is corona treatment in paper?