Research Information System
Drewno, vol.68, no.216, 2025 (SCI-Expanded, Scopus)
In this study, high-density fiberboards were produced using urea-formaldehyde resin (0.98 mole) at five different consumption rates (12.47%, 11.55%, 11.12%, 10.65%, and 10.1% by weight of dry fiber), and the physical and mechanical properties and formaldehyde contents of the boards were determined. Boards were produced using a continuous through-feed press in a working factory rather than laboratory-type press equipment. For almost all properties, no linear and stable increase or decrease was observed with an increase in adhesive consumption. On the contrary, the values of properties oscillated with the increase in adhesive consumption. Except in the case of surface soundness (SS), the mean values of the physical and mechanical properties presented significant differences. The property that was most improved was SS, which improved by 25.4% when UF consumption was 105 kg/m3. Among the physical properties, the greatest improvement was in surface abrasion, with a 15.7% improvement for the same consumption rate. For thickness swelling (TS 2 h and 24 h) and water absorption, a consumption rate of 115 kg/m3 provided the greatest improvement (decreases of 15.3%, 6.8% and 8.7% respectively). Therefore, considering all of the evaluated properties, a common consumption rate leading to the greatest improvement could not be determined. One of the most important properties of the panels was the formaldehyde emission (FE) value. FE decreased by around 17.6% when UF consumption was 115 kg/m3. However, the FE values were determined to be above the value for class E1, and should be reduced for marketed goods.