Corona Treatment FAQ’s

1. What is corona treating?
Corona treating is a very effective way to increase the surface tension of virtually any material. The result after corona treatment is a surface that is unchanged to the naked eye, but in fact is much more receptive to inks, coatings, and adhesives.

2. How does corona treating work?
The material being treated is exposed to an electrical discharge, or “corona.” Oxygen molecules within the discharge area break into their atomic form and are free to bond to the ends of the molecules in the material being treated, resulting in a chemically activated surface.

3. What factors influence the cost of corona treatment?
Equipment cost is a direct function of the amount of power required to treat the material, which is determined by the material speed, the width, the number of sides to be treated, and the responsiveness of a particular material to corona treatment.

4. How long does the treatment last?
The treatment will degrade over time if the material is not printed, coated, or bonded in-line. The rate of degradation depends upon the particular material and its storage conditions.

5. Where is the equipment installed?
The best place to install the corona treater is in-line with the printing, coating, or laminating process. Another common installation of the corona treater is directly on a blown film or cast film extruder, since fresh material is more receptive to corona treatment.

6. What types of materials can be treated?
Common corona treating applications include polyethylene, polypropylene, nylon, vinyl, PVC, PET, metallized surfaces, foils, paper, paperboard stock, and other materials.

7. How do I know if it will work for me?
Tell us about your adhesion problem. We will let you know if corona treatment is a possible solution for you, and we can process your samples in our applications lab to verify the results. Contact us today by calling Corotec at (800) 423-0348 or (860) 678-0038, by faxing us at 860-674-5229, or by email.