The effect of microwave treatment on the gloss resistance of varnishes in some tree species

Abstract

In this study, the effects of microwave treatment on the gloss properties of varnishes of wood species, which are commercially important in our country, were investigated. For wood material surface treatments, many methods have been developed in the field of application, as well as using a large number of surface treatment materials. It is very important to determine the interaction between wood and surface treatment agents, to improve wood properties and to determine their suitability for different usage areas. For this purpose, 3 different tree species; Leafy tree species Eastern Beech (Fagus Orientalis Lipsky.) and Bearded Alder (Alnus glutinosa subsp. Barbata (C.A. Mey.) Yalt.) and coniferous Eastern Spruce (Picea Orientalis L. (Link.)) and cellulosic varnish from varnish species , polyurethane varnish was used. Trial samples were prepared in the specified dimensions and examinations were made about the gloss on the samples. When the gloss values parallel to the fibers and perpendicular to the fibers are examined for cellulosic varnish, Beech wood has the lowest gloss value, while the highest gloss is determined in Alder wood. For polyurethane varnish, no difference was found when wood species were considered on gloss in both perpendicular and parallel directions to the fibers. As a process type, 90 seconds microwave showed a negative effect for polyurethane varnish. It was determined that 90 seconds of microwave application decreased the brightness values in tree species. As a result; It was determined that microwave application affects the gloss properties of varnishes.