Method for preparing biodegradable films from plant-based...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 5/18 (2006.01) B29C 47/80 (2006.01) C08B 30/12 (2006.01) C08L 3/00 (2006.01) B29C 47/40 (2006.01)

Patent

CA 2143291

There is provided a method for preparing biodegradable films from plant-based raw materials in the form of carbohydrates which method is continuous and carried out in one step. In the process the plant-based raw materials are modified and plastified and the films are prepared without interruption and in one step. The advantages of the invention reside in reduced shear stress of the starch molecules and thus in the improved properties of the films as well as in the cost-efficient, time-, energy- and space-saving manufacture.

Méthode de préparation, en continue et en une étape, de pellicules biodégradables faites à partir de matières premières d'origine végétale sous la forme d'hydrates de carbone. Le présent procédé modifie et plastifie les matières premières d'origine végétale et forme les pellicules sans interruption et en une seule étape. La présente invention a donc pour avantage de réduire la force de cisaillement subie par les molécules d'amidon, ce qui se traduit par une amélioration des caractéristiques des pellicules, ainsi que par des économies de fabrication en matière de coûts, de temps, d'énergie et d'espace.

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