Benefits of narrow web corona treatment
Corona treatment increases the wettability to the surface of the material through a low temperature corona discharge. Benefits of using corona or plasma treatment include:
- Materials typically will not shrink, warp, scrape, or catch fire
- A cost-effective, easy-to-integrate system for increasing surface tension in web applications.
- No chemicals are used in the process making it an environmentally sound option.
- Adaptable to most applications, the corona surface treatment has a diverse range of applications
- Suitable for high-speed printing presses, blown film production, and extrusion coating
How does narrow web corona treatment work?
Inks, coatings, and adhesives will adhere better to plastic films, foils, and paper when treated with a corona treatment system, which increases the surface energy of those materials. The treated materials will exhibit better printing, coating quality, and lamination strength. Here’s how it works:
- A power supply and a high-voltage transformer and a Corona discharge device integrate with a printing pres. The device is built with a cabinet housing an onboard power supply. Depending on the press size, a rear-end plate and a front-end plate are used for mechanically containing and mounting the corona treater.
- An electrode or series of electrodes are mounted to the end plates and gapped to an equal spacing just above a grounded treat roll where the material is passed.
- Two idler rolls, are used to control concentrate the web at making a 180 degree wrap around the treat roll.
- The corona field is produced in the air gap between the electrode and grounded roll, covering and treating the surface of the material as it passes through this area.
