Biodegradable molded article, manufacturing method thereof,...

B - Operations – Transporting – 32 – B

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B32B 9/02 (2006.01) B32B 5/18 (2006.01) B65D 1/00 (2006.01) B65D 65/46 (2006.01)

Patent

CA 2421280

Biodegradable molded articles; a process for producing the same: and compositions for foam molding packed in a packaging film bag to be used in the production. A bowl-type container (10a), which is one of the biodegradable molded articles as described above, consists of a bowl body (11a) comprising starch as the main component and a coating film (12) having at least hydrophobic properties and comprising a biodegradable plastic as the main component which is bonded to the surface of the bowl body (11a). This bowl body (11a) is formed by steam-foaming molding a material to be molded which is in the form of a slurry or a dough containing starch and water. The coating film (12) is closely bonded to the surface of the bowl body (11a) either directly or via an adhesive layer. Compositions for foam molding packed in such packaging film bags can be easily stored and molded.

L'invention porte sur des articles moulés biodégradables, sur leur procédé de fabrication et sur des compositions utilisées pour le moulage de la mousse emballée dans un sac se présentant sous forme d'un film plastique destiné à être utilisé au cours de la production. Un réceptacle de type bol (10a), qui est un des articles moulés biodégradables précités, comprend un corps (11a) constitué d'amidon comme composant principal et d'un film d'enrobage (12) présentant au moins des propriétés hydrophobes et comprenant un plastique biodégradable comme composant principal qui adhère à la surface du corps (1a) du bol. On obtient ce corps (11a) en moulant un matériau, se présentant sous forme d'une boue ou pâte contenant de l'amidon et de l'eau, par moussage par la vapeur. On fait adhérer étroitement le film d'enrobage (12) à la surface du corps (11a) du bol soit directement, soit par l'intermédiaire d'une couche adhésive. Il est ainsi possible de stocker et mouler facilement des compositions destinées au moulage de mousse emballée dans des sacs se présentant sous forme de film d'emballage.

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