Hennecke GmbH - machines and plants for polyurethane processing
ReboTec - recycling of trimmings ReboTec is a process, in which slabstock
waste and trimmings are comminuted into flakes, then
compressed into PU-bonded rectangular or cylindrical blocks
that are subsequently cut to size.
The process The trimmings
are shredded into flakes before being wetted with a
polyurethane adhesive, then blended in a mixer and
discharged into a mould. Since the loose flakes have a
significantly lower bulk density than the finished block,
the flakes are compressed inside the mould. Rebonded foam
is subsequently formed by adding hot steam and pressure.
Broad density range The density of
the finished blocks ranges between about 80 and 120 kg/m³.
Block densities of up to 500 kg/m³ are feasible with a
suitable flake preselection and special equipment.
Products The round or rectangular blocks
may be processed into the following shapes:
Panels in thicknesses from about 3 mm
Sheeting in a thickness range from
about 3 - 20 mm
Qualities
Densities of about
40 - 400 kg/m³
Compression hardnesses of about
3 - 300 kPa
Tensile strengths of up to 400 kPa and
more
Elongation at break in
excess of 70 %
Compression set levels below 3 %
Advantages
Production of a new,
profitable high-quality product
Almost full re-use of all waste
trimmings obtained in slabstock manufacturing
