Post-consumer recycled plastics

Details Post-consumer recycled plastics Post-consumer recycled plastics

C - Chemistry, Metallurgy

08

J

C08J 11/06 (2006.01) B29B 17/02 (2006.01)

Patent

CA 2236642

A process comprising contacting PCR polyolefin chips containing volatile impurities with a heated gas at a superficial velocity sufficient to subtantially reduce the volatile impurities. This process is found to cause the chips (i) to be essentially free of odors and (ii) subject to resin composition and prior use, to meet FDA regulations for direct food contact.

La présente invention concerne un procédé consistant à mettre en contact avec un gaz des copeaux de polyoléfine recyclés après consommation contenant des impuretés volatiles. Ce gaz est chauffé et possède une vélocité superficielle suffisante pour réduire notablement les impuretés volatiles. Il est avéré que ce procédé donne des copeaux (i) essentiellement exempts d'odeurs et (ii) autorisant des compositions de résines et des antécédents d'utilisation conformes aux règlements édictés par la "Food and Drug Administration" des Etats Unis d'Amérique pour le contact alimentaire direct.

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