Preparation for painting
Preparation for bonding
Increasing the surface energy
During plasma activation the surfaces are chemically changed.
Functional groups (e.g. OH-groups) are deposited, these then act as anchoring for the paint or adhesives.
The plasma etching of polymer surfaces results from a longer processing period.
During this process minute amounts of material from the polymer surfaces are removed.
This removal results in microscopic pits in the surface of the polymer providing the paint or adhesive with a greatly increased surface area to anchor to.
Especially with high performance polymers such as PTFE, POM, PA, PEEK it is necessary to perform a plasma etching process as preparation for painting or bonding.