A packaging laminate for a retortable packaging container

Details A packaging laminate for a retortable packaging container A packaging laminate for a retortable packaging container

B - Operations, Transporting

32

B

B32B 27/32 (2006.01) B32B 7/12 (2006.01) B65D 65/40 (2006.01)

Patent

CA 2422809

The disclosure relates to a packaging laminate for a retortable packaging container comprising a core layer (11), outer, liquid-tight coatings (12 and 13) and a gas barrier (14) disposed between the one coating (12) and the core layer (11). Between the gas barrier (14) and the core layer (11), there is a layer (16) of a lamination or sealing agent of such a nature that the lamination or sealing agent has a melting point which is higher than the maximum temperature to which the retortable packaging container is to be subjected during a normal heat treatment in a retort. The lamination or sealing agent in the layer (16) may, for example, be a polypropylene with a melting point of above 130 ~C.

L'invention concerne un stratifié d'emballage destiné à un contenant d'emballage stérilisable en autoclave, comprenant une couche principale (11), des revêtements externes étanches aux liquides (12, 13) et une barrière contre les gaz (14) située entre un des revêtements (12) et la couche principale (11). Une couche d'agent de doublage ou d'étanchéité (16), située entre la barrière contre les gaz (14) et la couche principale (11), présente un point de fusion supérieur à la température maximale à laquelle le contenant d'emballage stérilisable en autoclave est soumis durant un traitement thermique normal en autoclave. L'agent de doublage ou d'étanchéité dans ladite couche (16) peut, par exemple, être un polypropylène dont le point de fusion est supérieur à 130 ·C.

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