Rfid composite for mounting on a metal object

G - Physics – 01 – V

Patent

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Details

G01V 15/00 (2006.01) G01V 3/12 (2006.01) G08B 13/24 (2006.01)

Patent

CA 2391628

A composite containing an RFID can be mounted on, in, or adjacent a metal object without de-tuning of the antenna of the RFID. The composite (12) includes a first RFID or a EAS device- containing layer (14), and a foamable material layer (17) held in proximity with the first layer. The foamable material layer expands in size and reduces in density when subjected to external stimuli, such as heat or microwaves. The foamable layer may comprise an intumescent material, and may have RF radiation-absorbing material filler. Pressure sensitive adhesive (19), when the composite is in a label form, may be used to mount the composite on or adjacent a metal (22) object after printing of the printable surface (12) of the composite, and the foamable material layer (17) is subjected to the external stimuli after printing and either before or after mounting on or adjacent the metal (22) object. Image

L'invention concerne un composite contenant un RFID, pouvant être monté sur, dans, ou de manière adjacente à un objet métallique sans désaccorder l'antenne du RFID. Le composite (12) comprend une première couche (14) contenant un dispositif RFID ou EAS, et une couche (17) de matière pouvant mousser à proximité de la première couche. La couche de matière pouvant mousser s'étend en taille et diminue en densité lorsqu'elle est soumise à des stimuli externes, tels que la chaleur ou les micro-ondes. La couche pouvant mousser peut comprendre une matière intumescente, ainsi qu'une charge de matière d'absorption des rayonnements RF. Lorsque le composite se présente sous forme d'étiquette, on peut utiliser un adhésif autocollant (19) pour monter le composite sur ou de manière adjacente à un objet métallique (22) suite à l'impression de la surface imprimable (12) du composite, et la couche (17) de matière pouvant mousser est soumise aux stimuli externes après l'impression et soit avant ou après le montage sur ou de manière adjacente à l'objet métallique (22).

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