Low density polyethylene powder (LDPE) was used as polymer binder in the core layer of three layer particleboard.
In the first phase, six levels of the LDPE powder (5–30 wt.%) based on the composition by
weight, were mixed with the core particles with 8 wt.% urea–formaldehyde (UF) resin. In the second
phase, the LDPE powder content was kept constant at 10 wt.% in all treatments and the UF resin content
applied to the core layer was decreased gradually from 8 to 4 wt.%. Thickness swelling and water absorption
of the particleboards significantly decreased with increasing the LDPE content in the core layer. Similarly,
incorporation of the LDPE powder into the core layer of the particleboard greatly improved internal
bond strength. The flexural properties of the particleboards, the modulus of rupture (MOR) and modulus
of elasticity (MOE), were positively affected by increasing LDPE content up to 10 wt.% but the further
increment of the LDPE decreased the MOR and MOE. The UF resin content can be reduced in the core layer
of the particleboard as a function of increasing the LDPE powder.