Plasma technologies can increase the surface energy of materials. The dyne levels reveal the surface wettability. As the dyne level increases, the wettability and adhesion of the material increases as well.

Free surface energy has to be much greater than the surface tension of the liquid (by a recommended level of at least 2 to 10 dynes) in order to achieve good wettability. The different ways to measure wettability include measuring the contact angle or by using Dyne test solutions.

Dyne solutions are fast and easy to use. After applying a thin layer of the dyne solution to the material, if beads of the solution form, then it indicates that the surface energy of the material is lower than the dyne level of the Dyne solution. Plastics generally have lower surface energies due to less available bonding sites, meaning that it is difficult for liquids to wet out on the surface. Wetting the surface is necessary to glue plastics to other objects or to paint the plastic’s surface.

If a good wettability is not achieved, the objects may lose adhesion. Another way to improve bonding is to use plasma etching with a plasma etching machine.

As a result, Plasma etching increases the surface area of the material and increases bonding.