Corona is the phenomenon of localized discharge of the surface of a charged body in a gaseous or liquid medium. It often occurs around high-voltage power lines and near the tips of charged bodies, and substances such as ozone and nitrogen oxide are produced in the corona process.
In 110kV at the above substations and lines, a similar light layer often appears, emitting a mocking and siren sound. The corona produced by high voltage electricity consumes electrical energy and interferes with radio waves. Corona is a unique form of stabilized discharge from an electric field.
Industrial corona machines are commonly used to solve problems such as fading printing, poor material adhesion, uneven coating release, unsaturated colors, and printing that fails to meet requirements. The solution is to improve the surface adhesion of the material, which is a good solution to these problems. The current popular surface treatment method is corona, which can improve the surface adhesion of the material. Roughening the surface of the material, improve the surface tension of the material, so that the ink, glue and coating better adhere to the surface of the treated material; at the same time, the ozone produced in the corona process can change the molecular structure of the material surface from non-polar to polar. Printing can ensure full color and clean picture for a long time to achieve the ideal printing and bonding effect.
The principle of corona treatment of materials is to use high-frequency high-voltage discharge on the surface of treated plastics (high-frequency AC voltage up to 5,000-15,000V/m2) to produce low-temperature plasma, so that the surface of the plastic produces a free radical reaction, so that the polymer cross-linking. Increase the surface roughness of the material, increase the wettability of polar solvents - these ions enter the surface of the printing body through electric shock and penetration, destroying its molecular structure, and then oxidize and polarize the molecules of the treated surface, thus improving the adhesion of the printing surface.
Localized self-sustained discharge of a gaseous medium in an inhomogeneous electric field. It is the most common form of gas discharge. In the vicinity of a tip electrode with a large radius of curvature, a corona discharge occurs because the gas is ionized and excited by a local electric field strength that exceeds the ionizing field strength of the gas. When corona occurs, light can be seen around the electrode, accompanied by sound. Corona discharge can be a relatively stable form of discharge or an early stage of development in the process of uneven electric field gap penetration.
Applications of Corona Machines
Corona machines can handle a variety of homogeneous film materials. Such as plastic film, metal plate, metal film, vacuum aluminized film. It can be used for polyethylene, polypropylene, polyvinyl chloride, polyamide, polyester, polycarbonate, fluoroplastics and various corresponding copolymers.
Hefeng Machinery Group focuses on the development and application of surface treatment industry for more than 20 years, corona machine, corona treatment machine, plasma machine, static generator, static eliminator, dust removal machine, UV curing, UV power supply, electronic UV, UV light box, plasma treatment system, vacuum plasma, spark machine, plasma treatment, flame treatment machine, electronic spark machine, EDM impingement machine, surface treatment machine, polymer Surface Flowering Machine, UV lamp, UV transformer, and so on. It is a national high-tech enterprise integrating R&D, production and sales.
Our core competitiveness comes from the fact that we never stop launching new products and designing molds, and vigorously investing in the research and development of new products, it is this guiding principle that makes us different, which also enables us to become a real solution-oriented company in the industry. From the design of the solution to the final inspection of the equipment, we pay meticulous attention to every detail to ensure that the quality of our products and customer service meets the highest standards, and with our highly qualified service team and experienced technicians, we have gained an international reputation as a solid and reliable partner.
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