EN
The aim of this study was to investigate the applicability of PF-pMDI hybrid resins for the manufacture of OSBs. A three-layer OSBs were manufactured with the adhesive solution (PF-pMDI mixture), pMDI share in the adhesive solution was 0, 10, 25, 50, 75, 90 or 100%. The assessed properties of OSBs were: modulus of rigidity, modulus of elasticity (EN 310), internal bond (EN 319), tensile strength perpendicular to the plane of the board (EN 319), water resistance as per V-100 test (EN-1087-1), swelling after 24 hours (EN 317), as well the authors took into account the relation between the mixture price and resulting bending strength. On the basis of data the fallowing conclusions were drown: the partial substitution of PF resin with pMDI allows for manufacturing OSBs with better mechanical properties and changing their class from OSB/3 to OSB/4, the use of hybrid resin PF/pMDI significantly increases water resistance of the boards determined by the boiling test, addition of pMDI to PF resin does not markedly change physical and mechanical properties of OSBs but allows for reducing the cost of the adhesive mixture.