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.
How does corona discharge treatment work?
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 treated 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.
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 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.7 dic 2020