Films and methods for making tampering events evident

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 65/38 (2006.01) B65D 65/40 (2006.01)

Patent

CA 2718326

Films and methods for making tampering events obvious are disclosed. In one embodiment, a tamper evident film includes a coating containing a first substance, and an observable change occurs when the first substance comes into contact with a second substance. In another embodiment, a tamper evident stretch wrap includes an inner portion, an outer portion, and a substance between the inner and outer portions that is adapted to escape from between the portions when the outer portion is breached. In another embodiment, a tamper evident stretch wrap includes a first layer of film having a first pattern and a second layer of film having a second pattern that overlap to form a predetermined third pattern. In yet another embodiment, a stretch wrap is exposed to ultraviolet light and checked for a change in a fluorescent signature to determine whether the stretch wrap has been breached.

La présente invention concerne des films et des procédés pour rendre des événements dutilisation intempestive évidents. Dans un mode de réalisation, un film inviolable comprend un revêtement qui comprend une première substance, et un changement observable se produit lorsque la première substance entre en contact avec une seconde substance. Dans un autre mode de réalisation, un emballage étirable inviolable comprend une partie intérieure, une partie extérieure et une substance entre les parties intérieure et extérieure qui est conçue pour sortir de lespace entre les parties lors dune utilisation intempestive de la partie extérieure. Dans un autre mode de réalisation, un emballage étirage inviolable comprend une première couche de film dotée dun premier motif et une seconde couche de film dotée dun deuxième motif qui se chevauchent pour former un troisième motif prédéterminé. Dans encore un autre mode de réalisation, un emballage étirage est exposé à une lumière ultraviolette et contrôlé pour vérifier sil existe un changement dune signature fluorescente et déterminer si lemballage étirable a fait lobjet dune utilisation intempestive.

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