Self-adhesive resealable tamper-evident tape

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

40/1, 117/26

C09J 7/02 (2006.01) B65D 33/16 (2006.01) B65D 33/34 (2006.01) G09F 3/03 (2006.01)

Patent

CA 2331422

A self-wound, self-adhesive, resealable tamper-evident tape is provided. The tape is used to seal any container requiring a self-adhesive closure, such as bags or pouches, and provides clear visual evidence if the self-adhesive seal is peeled apart. The tape comprises a backing sheet, the upper surface of which is coated with a release layer, and the bottom surface with an adhesive. The release layer is relatively non-adherent to the adhesive so that the tape may be wound or rolled up without a separating liner. A non-visible patterned varnish layer is applied to the adhesive to create a hard surface onto which a colored ink layer is subsequently applied. The colored ink layer breaks or chips when the self-adhesive seal is peeled apart and retains this appearance if the tape is reapplied to seal the container, thereby providing visible evidence of tampering.

Bande enroulée, auto-adhésive, pouvant être rescellée et indicatrice d'effraction, qui est utilisée pour sceller tout récipient exigeant une fermeture auto-adhésive, tel que des sacs ou poches, et qui fournit une preuve visuelle claire si la bande de scellement auto-adhésive a été décollée. Ladite bande comporte une feuille de support dont la surface supérieure est couverte d'une couche de séparation et dont la surface inférieure est couverte d'un adhésif. La couche de séparation est relativement non adhérente à l'adhésif si bien que la bande peut être enroulée sans garniture de séparation. Une couche de vernis invisible et à motifs est appliquée sur l'adhésif pour créer une surface dure sur laquelle est ensuite appliquée une couche d'encre colorée. La couche d'encre colorée casse ou se rompt en morceaux lorsque la bande de scellement auto-adhésive est décollée et conserve cet aspect si la bande est réappliquée pour sceller le récipient, ce qui fournit la preuve visible qu'il y a eu effraction.

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