For decorating the surface with a paint, lacquer, glue or coating a good adhesion between surface and decorating
fluid is necessary. Surface treatment is performed to increase the adhesion properties of surfaces. Among other
methods physical treatment methods like corona, plasma or flame treatment are wide-spread. The advantages of
these compact treatment units are that they can easily be integrated in the production line providing good treatment
results even at high working speeds and that they do not produce any significant waste.
Which method is best-suited depends on the form of the part to be treated. Moulded parts are a domain for flame
treatment. Small moulded parts or small working width are treated by atmospheric plasma devices. Corona treatment
is mainly used for even surfaces like films and foils.
Surface properties corresponding to adhesion
For a good adhesion you have to fulfil two conditions