Abstract
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.
Highlights
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 objective of this study was to evaluate the effects of resin content and board density on the mechanical properties of particleboards made from willow (Salix viminalis)
modulus of elasticity (MOE) and modulus of rupture (MOR) increased with increasing board density and resin content
Summary
One of the possible alternative raw materials in particleboard manufacturing can be fast growing shrubs of willow (Salix viminalis). They are cultivated in Poland for energy purposes, and their suitability for particleboard industry was confirmed by a number of studies (Frąckowiak, 2007; Frąckowiak et al, 2008; Warmbier et al, 2013, 2014a, 2014b). Kowaluk and Fuczek (2010), and Kowaluk et al (2008) used non-standard, specially prepared, particles from the willow (Salix viminalis). These particles, named fibrous chips, were produced on a Pallmann defibrator using a span of 1.2 mm between the hammer and milling disc. The authors showed the suitability of these particles for particleboard manufacturing
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