Extrusion process and decorative synthetic lumber produced...

Details Extrusion process and decorative synthetic lumber produced... Extrusion process and decorative synthetic lumber produced...

B - Operations, Transporting

29

C

B29C 47/00 (2006.01) B29C 47/38 (2006.01) B44F 9/02 (2006.01)

Patent

CA 2488188

Described is an extrusion process and a decorative synthetic lumber produced therefrom by providing a cellulose plastic composition; delivering the composition through an area containing a screw in an extruder; maintaining a back pressure in the screw area to keep the screw area filled with the composition; and extruding the composition, at a temperature at or slightly above the melt point of the composition, into a decorative shaped synthetic lumber product through a breaker plate designed to maintain the back pressure in the screw area. A colorant may be added to the feed throat of the extruder.

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