Process for detecting leaks in sealed packages

G - Physics – 01 – M

Patent

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Details

G01M 3/38 (2006.01) G01M 3/22 (2006.01) G01N 31/22 (2006.01)

Patent

CA 2547525

The present invention relates to a process for detecting a leak in a package. The process comprises preparing a package by covering at least a portion of an O2-sensitive product with a multilayer film comprising (i) a leak-indicator layer in which a O2- sensitive indicator is present throughout the leak- indicator layer; and (ii) an O2-barrier layer outward of the leak-indicator layer. A low O2-environment is provided within the package. The leak-indicator layer. A low O2-environment is provided within the package. The leak-indicator layer is then illuminated with light containing a wave-length absorbed by the O2-sensitive indicator, so that the O2-sensitive indicator produces an emission of radiation in an amount inversely proportional to a level of O2 present with the O2-sensitive indicator. The then multilayer film is scanned while the O2-sensitive indicator is emitting radiation, the scanning being carried out by sensing and comparing the amount of radiation emitted from at least two different regions of the multilayer film.

L'invention concerne un procédé de détection de fuite sur emballage clos : élaboration d'emballage recouvrant au moins une partie de produit à sensibilité O¿2?-avec un film multicouche qui comprend (i) une couche indicatrice de fuite à indicateur de sensibilité O¿2? sur toute la couche; et (ii) couche barrière pour O¿2? à l'extérieur de la couche précédente. Il existe un environnement faible en O¿2? dans l'emballage. Ensuite, la couche indicatrice est éclairée avec de la lumière qui contient une longueur d'onde absorbée par l'indicateur à sensibilité O¿2?, de sorte que celui-ci produise un rayonnement selon une quantité inversement proportionnelle à un niveau d'O¿2? présent dans l'indicateur. Ensuite, le film multicouche est exploré tandis que l'indicateur émet son rayonnement, et l'exploration est conduite par détection et comparaison des quantités de rayonnement émises depuis au moins deux régions différentes du film multicouche.

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