The foaming capacity of the polymer materials was
assessed by the measurement of the void content of the
final product after extrusion. The experimental results allow
defining an optimum set of extrusion conditions (screw profile
and speed, cooling temperature, extrusion temperatures
along the screw. . .) and material formulations (CBA content,
fibre content and nature. . .) to improve void content and
foams properties. The cell morphology (number, dimensions,
shape. . .) and the mechanical properties (tensile,
bending. . .) are analyzed.