Polymer-coated oven board and food package made from it

Details Polymer-coated oven board and food package made from it Polymer-coated oven board and food package made from it

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) B32B 27/10 (2006.01) B65D 5/56 (2006.01) B65D 65/40 (2006.01) B65D 77/20 (2006.01) B65D 81/34 (2006.01)

Patent

CA 2681807

The invention relates to polymer-coated oven board and a closed oxygen impermeable food package formed from it. According to the invention, the coating on the board (1) contains an oxygen barrier layer (7) of polyamide (PA) and a surface layer (8) of polyethylene terephlatae (PET) adhered to it without a binding agent layer between them. The polymer layers (7, 8) have been produced by co-extrusion so that the polyamide layer (7) adheres directly to the board in extrusion. In a closed package according to the invention, the superimposed polyamide and PET layers (7, 8) are located inside the board layer, and on the outer surface of the package there may be a PET layer (9). The package is sealed by heat sealing the PET layers. Polyamide has been selected so that it withstands heat sealing and the heating of the package in an oven.

L'invention porte sur un carton pour four revêtu de polymère et sur un emballage pour aliments fermé et imperméable à l'oxygène fabriqué à partir dudit carton. Selon l'invention, le revêtement présent sur le carton (1) contient une couche formant barrière à l'oxygène (7) constituée de polyamide (PA) et une couche de surface (8) constituée de polyéthylène téréphtalate (PET), adhérant sans la présence d'une couche d'agent de liaison entre lesdites deux couches. Les couches de polymère (7, 8) sont fabriquées par coextrusion, de telle sorte que la couche de polyamide (7) adhère directement au carton par extrusion. Dans un emballage fermé conforme à l'invention, les couches superposées de polyamide et de PET (7, 8) se trouvent à l'intérieur de la couche de carton, et une couche de PET (9) peut être présente sur la surface extérieure de l'emballage. L'emballage est fermé hermétiquement par thermoscellage des couches de PET. Le polyamide est sélectionné de façon à supporter le thermoscellage et la chaleur produite lorsque l'on chauffe l'emballage dans un four.

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