Low-density cellular wood plastic composite and process for...

Details Low-density cellular wood plastic composite and process for... Low-density cellular wood plastic composite and process for...

C - Chemistry, Metallurgy

08

J

C08J 9/00 (2006.01) B27N 3/00 (2006.01) B27N 3/28 (2006.01) B29C 47/00 (2006.01) B29C 47/10 (2006.01) B29C 47/90 (2006.01) C08J 9/12 (2006.01) C08L 23/06 (2006.01) C08L 97/02 (2006.01) B29C 44/34 (2006.01) B29C 47/34 (2006.01)

Patent

CA 2445076

A low-pressure CO2 tank or an air compressor with a refrigerated air dryer is attached to the vent zone of a standard twin-screw extruder. During extrusion, the gas is dissolved in the wood-plastic melt. The CO2 expands which foams the wood-plastic material.

L'invention concerne un réservoir de CO¿2? à basse pression ou un compresseur d'air doté d'un sécheur à air réfrigéré, ledit réservoir ou compresseur étant relié à la zone de dégazage d'un extrudeur à deux vis traditionnel. Au cours de l'extrusion, le gaz est dissous dans la fonte du plastique-bois. Le CO¿2? s'expanse, ce qui forme la matière en plastique-bois.

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