Packaging materials with enhanced thermal-insulating...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 5/18 (2006.01) B32B 27/10 (2006.01) B32B 27/18 (2006.01) B32B 29/00 (2006.01) B65D 81/38 (2006.01)

Patent

CA 2760933

A packaging material with enhanced thermal-insulating performance is disclosed that includes a paper-based substrate and a thermal- insulating layer positioned on at least one surface of the substrate. The thermal-insulating layer contains void structure and is derived from a fluid thermal-insulating composition comprising: 20% to 70% weight of filler; 15% to 70% weight of organic binder; 0.5% to 10 weight of plasticizer; and 10% to 15% weight of moisture, based on the total thermo-insulating composition weight. When desired, the disclosed packaging material may further include a paper-based top layer such that the thermal-insulating layer is positioned between the paper-based substrate and the paper-based top layer. The disclosed packaging material may be used in the formation of thermo-insulating containers such as food bowls and beverage cups, as well as the sleeve components to impart thermo-insulating performance to packaging containers.

L'invention porte sur un matériau d'emballage avec performance d'isolation thermique renforcée, lequel matériau comprend un substrat à base de papier et une couche d'isolation thermique positionnée sur au moins une surface du substrat. La couche d'isolation thermique contient une structure à vide, et est dérivée d'une composition d'isolation thermique fluide comprenant : de 20 % à 70 % en poids de charge ; de 15 % à 70 % en poids de liant organique ; de 0,5 % à 10 % en poids de plastifiant ; et de 10 % à 15 % en poids d'humidité, par rapport au poids total de la composition d'isolation thermique. Lorsqu'on le souhaite, le matériau d'emballage selon l'invention peut en outre comprendre une couche supérieure à base de papier, de telle sorte que la couche d'isolation thermique est positionnée entre le substrat à base de papier et la couche supérieure à base de papier. Le matériau d'emballage selon l'invention peut être utilisé dans la formation de récipients thermo-isolants tels que des bols pour aliment et des tasses pour boisson, ainsi que dans les composants de manchon pour communiquer une performance d'isolation thermique à des récipients d'emballage.

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