Particles derived from milling three-layer particleboards,
with sizes from 0.5 to 3 mm, were used for
making composites with polypropylene by an injection
moulding method. Maleated polypropylene was used as a
coupling agent. The objective of this study was to evaluate
the mechanical and physical properties of the composites
made from particleboard and polypropylene with respect to
the content of particles derived from particleboard and
coupling agent addition. Properties of the composites did
not differ significantly from those of composites with virgin
industrial wood particles used for manufacturing particleboards.
Moreover, these properties were comparable
with the properties of typical wood–plastic composites
with wood flour. Particles derived from milling particleboards
have proved to be an effective alternative wood
component of wood–plastic composites.