How does a corona treater 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 a corona treater for printing?
Corona treaters are integrated in-line on printing presses and digital printers to remove contamination, increase surface energy and provide a surface suitable for printing. Printers using water based, solvent based and UV inks benefit from adding in-line bump treatment to their lines.
How long does corona surface treatment last?
six months
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.
Can corona discharge shock you?
Yes, but the shock is a result of stored electrical energy in the form of static present on the material. Once the corona treating system power supply is de-energized, all power to the electrodes is removed. It is quite common to experience static buildup and discharge in the process of converting films.
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 the corona field?
Corona is a luminous, audible discharge that occurs when there is an excessive localized electric field gradient upon an object that causes the ionization and possible electrical breakdown of the air adjacent to this point. Corona is characterized by a colored glow frequently visible in a darkened environment.
What does corona treatment do to the surface of a plastic substrate?
Corona treatment is used to increase the surface energy of plastic and other materials for improved adhesion of inks, adhesives, and coatings. Corona treated materials feature higher printing and coating quality than materials that do not undergo this treatment.
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.
What is plasma surface treatment?
Plasma surface treatment is a process that raises the surface energy of many materials so as to improve the bonding characteristics. One form of plasma treatment is also commonly known as a corona treatment, which was invented by Danish engineer Verner Eisby in the 1950s.
What is corona electrode?
Corona discharges are moderately low-power electric discharges that occur at or near atmospheric pressure. The corona is invariably produced by strong electric fields associated with small diameter wires, needles, or sharp edges on an electrode [65].
What is corona electrical?
Corona Discharge (also known as the Corona Effect) is an electrical discharge caused by the ionization of a fluid such as air surrounding a conductor that is electrically charged.
How does flame treatment work?
Flame treatment uses a carefully controlled blend of natural gas and air to create a hot, oxygen rich plasma. First, the heat removes contaminants. Then, after contaminant removal, the oxygen rich plasma activates the surface by partial oxidation.