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04.10.2006 presentation in Principia Partners WPC-conference and table top show
in Baltimore, USA Conenor and Maillefer have used their new cast die design together
with 2-rotor Conex Wood Extruder CWE 500-2 to produce flat multilayer panels
in width of 600 mm (24 in.) and presented this new technology at the
Wood-Plastic Composites 2006 conference held in September in Baltimore, MD,
USA sponsored by Principia Partners. Previous studies in the US done on WPC-panels made by conventional
compression techniques and using wood flour at relatively low contents show
inferior performance in rigidity and thermal stability vs. wood panels like
plywood, OSB and others. Conenor developed advanced technique using multiple
material layers, high wood content at levels 70%, long fibre aspect ratio and
fibre cross-orintation and efficient distributive mixing of all
WPC-formulation components without inducing excess shear heat is to overcome
the reasons why WPC-panels could not gain equal strenght performance to
compete with the wood panels existing in the market while offering superior
moisture absorption performance. A vital factor in WPC-panels is to reduce their weight i.e. material
density from standard WPC-products like decking boards. There are two means
for weight reduction; hollow boards with fingered dies or foam core sandwich
structures which both are possible with CWE-technique. Conenor preferred
solution is foam core sandwich structures of two material formulations where
the core is manufactured in reduced densities down to 0,5 g/cm3 of a
WPC-formulation say 50/50 wood-plastic inside the panel solid surfaces in
another WPC-formulation containing higher wood content in levels of 70%. An
additional benefit in these new WPC-panels is the fact that also the sides of
the panels are covered with the same moisture resistant WPC-material as the
top and bottom - and without seams ! download the presentation in pdf click here download the presentation multimedia files in
wmv page5 page7
page8
page9 page10
page11 page12
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