Effects of density and kind of resin in the properties of OSB of Pinus taeda L.

Abstract

This research was developed with the objective to evaluate the effects of two levels of board density and three kinds of resin in the properties of OSB made from Pinus taeda L. The boards were manufactured with nominal density of 0,65 and 0,90 g/cm³, using phenol-formaldehyde (FF), melamina-urea-formaldehyde (MUF) and phenol-melamina-urea-formaldehyde (PMUF) resins, in amounts of 6% of solid contents. The increase in board density results in better properties of MOE and MOR parallel, internal bond and water absorption, however, the thickness sweeling 24 hours was wronged. Not observed the effects of density and kind of resin in the MOE and MOR perpendicular. The board produced with FF resin showed better results on all of the properties with exception of MOE and MOR perpendicular. The results of MOE and MOR obtained for OSB produced with nominal density of 0,65 and 0,90 g/cm³ and FF, MUF and PMUF resins attends to minimum values required from CSA 0437 (1993).