Method and apparatus for pelletizing biomaterial composites

B - Operations – Transporting – 29 – B

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B29B 9/06 (2006.01) B29C 71/00 (2006.01) C08B 1/00 (2006.01) C08B 37/00 (2006.01) C08J 3/18 (2006.01)

Patent

CA 2619945

A process for preparing low moisture content polymer biomaterial composites and expandable polymer biomaterial composites by extrusion through a die plate (18) into a waterbox (16) and pelletizing with cutter blades (14). Polyolefins or condensation polymers are melt blended with a solid or semi-solid biomaterial component (155), such as polysaccharides, including cellulosics and starches, or proteinaceous materials, including polypeptides, and are extruded, pelletized underwater, and processed with accelerated drying to achieve moisture levels as low as one percent (1%) or less.

L'invention concerne un procédé de préparation de composites de biomatériaux polymères à faible contenu d'humidité et de composites de biomatériaux polymères expansibles par extrusion à travers un plateau matrice (18) dans une boîte à eau (16) et pellétisation avec des lames à couper (14). Des polyoléfines ou des polymères de condensation sont mélangés par fusion avec une composante de biomatériaux solide ou semi-solide (155), telle que des polysaccharides, notamment des matériaux cellulosiques et des amidons, ou des matériaux protéiques, notamment des polypeptides, puis sont extrudés, pellétisés sous l'eau, puis traités avec un procédé de séchage accéléré pour obtenir des niveaux d'humidité égaux ou inférieurs à 1 %.

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