Abstract
In this study, Fire Retardant (FR) chemicals with different proportions were added into fibers and high density fiberboards (HDF) were produced using fibers from Scots pine and beech (50:50). HDF panels containing 3%, 6%, and 9% borax, boric acid, ammonium polyphosphate and alpha-x chemicals powders were manufactured. Limiting oxygen index (LOI) and thermal conductivity properties of HDF panels were determined. FR chemicals improved the LOI and thermal conductivity. However, this improvement was affected by the type and the concentration of the FR chemicals used. The best thermal conductivity result was obtained with 9% boric acid concentrations (0.2815 W/moK) while the best LOI results were obtained from 6% and 9% ammonium polyphosphate concentrations (45%). Keywords: HDF, Borax, Boric acid, Thermal conductivity, LOI
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