Plasma Treatment

Plasma Treatment

Plasma treatment is used for enhansing adhesion of Polymers (e.g. polypropylene, polyethylene).  Plasma treatment is the physical method of enhancing adhesion of substrates via chemical modification of the surface.


Surface energy of polymers is very low therefore their wettability and adhesion strength to coatings (paints, adhesives) are poor. Plasma treatment causes foration of oxygen containing groups on the substrate surface, which increase the surface energy and improves adhesion.

One of the plasma treatment methods is corona treatment. Corona discharge forms as a result of applying between two electrodes a high voltage potential at high frequency. The plastic part is placed within the space between the electrodes. The electrical discharge converts the surrounding air into a plasma. The plasma particles clean and oxidize the substrate surface increasing its surface energy.
The cleaning and surface modification effect of plasma treatment is not durable therefore the treated surface should be coated as fast as possible.




Blog, Updated at: 9:47 PM
 
back to top