Abstract
In this paper, the wettability of two different wood species as raw material for Oriented Strand Board (OSB) is analyzed. One species is pine, a common material for the production of OSB; the other species, poplar, and especially hybrid poplar, is newly used in OSB and might require a modified board production process compared to pine. Therefore, strands of hybrid poplar obtained from a central European poplar plantation were compared to pine strands in terms of surface characteristics and contact angles after application of the adhesives. For the contact angle measurement droplets of two types of adhesives, melamine urea formaldehyde (MUF) resin and polymeric methylene diphenyl diisocyanate (pMDI), were applied onto the surface of the strands. pMDI exhibited larger contact angles on poplar than on pine; but for both wood species the contact angles were low when compared to MUF. MUF values were much higher, but relatively similar numbers were measured for both wood species.
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