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To utilise and exploit the waste of lumber industry
as well as other materials like rice husks, peanut shells bamboo
or sugar cane, plastic machinery manufacturers are developing
specially coated conical twin screw extrusion systems. Cincinnati
extrusion have developed special equipments that can produce profiles
made from 80-85% woodflour in core sections and skin layers of
PP and EVA. Moisture level of wood and cellulosic is a problem.
These new equipments can handle cellulosic fillers with moisture
level of five - seven percentage without the need of drying. The
market of highly filled (wood) profiles is growing quite well
in North America; Europe and Asia are in the early development
stage.
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