Enhancing the abrasion resistance of PMMA/ATH layers realised by means of atmospheric pressure plasma powder deposition on wood

In this article, we present the deposition and stabilisation of PMMA/ATH powder on wood and glass substrates in a cold atmospheric pressure plasma-spray process. For this purpose, the raw powder material was injected to the effluent plasma of a jet discharge to coat the substrate that is situated in a comparatively cold region of the afterglow. Scince the abrasion resistance of pure PMMA/ATH powder coatings deposited with the use of compressed air as process and carrier gas turns out to be very low, two variations to stabilise those coatings were tested. The replacement of compressed air as process and carrier gas by forming gas did not lead to an increased abrasion resistance, but the addition of phenol-formaldehyde (PF) powder successfully stabilised the coatings.