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The paper presents the results of studies on the mechanical properties of one-layer particleboards made from willow (Salix viminalis). Since the particleboards were to simulate the core layer of typical furniture three-layer particleboards, they were made from coarse particles of the size from 1 to 4 mm using urea-formaldehyde resin as a binder. The effects of board density and resin content were evaluated. Three levels of resin content: 8, 9 and 10 %, and board density: 0.57, 0.60 and 0.63 g/cm3, were assumed. The effects of both factors, for their assumed ranges of variation, on the mechanical properties of particleboard were statistically signifi cant. The modulus of elasticity (MOE), modulus of rupture (MOR), internal bond (IB) and screw holding strength (SHS) were determined. The effect of board density on MOE and MOR was greater than that of resin content, whereas the effect of board density on IB and SHS was less than that of resin content.U radu su prikazani rezultati istraživanja mehaničkih svojstava jednoslojne ploče iverice izrađene od drva vrbe (Salix viminalis). Kako bi se dobile iverice koje simuliraju srednji sloj tipične troslojne ploče za izradu namještaja, iverice su izrađene od drvnih čestica veličine od 1 do 4 mm, uz primjenu urea-formaldehidnog ljepila kao veziva. Procijenjen je utjecaj gustoće ploče i sadržaja ljepila na mehanička svojstva ploča. Istražene su tri razine sadržaja ljepila: 8, 9 i 10 %, te tri gustoće ploče: 0,57, 0,60 i 0,63 g/cm3. Utjecaj sadržaja ljepila i gustoće na mehanička svojstva ploča statistički je značajan. Istraživana su ova mehanička svojstva ploča: modul elastičnosti (MOE), modul loma (MOR), unutrašnja čvrstoća vezanja (IB) i čvrstoća držanja vijaka (SHS). Gustoća ploče imala je veći utjecaj na MOE i MOR nego sadržaj ljepila, dok je utjecaj gustoće ploče na IB i SHS bio manji od utjecaja sadržaja ljepila

Resin Content and Board Density Dependent Mechanical Properties of One-Layer Particleboard Made from Willow (Salix viminalis)