Einfluß des Sorptionsverhaltens auf die Eigenschaften von Spanplatten

Commercial particleboards may differ considerably as regards hygroscopicity. This is related to a corresponding variation in sorption behavior of the boards, particularly in applications subjected to increased humidity. Following a short survey of potential factors affecting particleboard hygroscopicity, examples are given for the effects of different sorption behavior on some board properties: differences in sorption behavior under natural and defined cyclic climatic load as well as in a differentiating climate; differences under simultaneous mechanical and climatic load (creep behavior); problems in testing (V 100- tensile strength perpendicular to the surface), during further processing as well as during actual use of highly hygroscopic particleboards. Finally, consequences are discussed which follow for board production and corresponding standards for sorption behavior.