Acta Scientiarum Polonorum
Silvarum Colendarum Ratio et Industria Lignaria

Abstract Filtering dust separation proceeds in various conditions. It is necessary to determine the work factors of dust filter for each case of this method of air cleaning – first of all to select a suitable fibrous material on which the separation process of solid particles from air stream occurs. Increased relative humidity of air conveying the dust particles is always a significant difficulty for the separation process in wood dust separators. Application of unwoven fabrics with special finished active surface – hydrophobically appreted – significantly rises air cleaning of wood dust in these cases. At standard unwoven fabrics – with homogenous structure – appears an opposite interaction. The separation efficiency decreases with growth of relative humidity of the air stream.