Indicating device for temperature sensitive products

G - Physics – 01 – K

Patent

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Details

G01K 11/12 (2006.01) G04F 13/00 (2006.01)

Patent

CA 2577994

The present invention provides a device capable of exhibiting a time- temperature dependence that comprises an upper layer carrying a first reactant selected from a group of materials such as chelating agents and a base layer carrying a second reactant adapted to react with the first reactant upon triggering. A barrier layer is provided between the upper layer and the base layer. Visual characteristic is changed depending on time and temperature after triggering had occurred while the device is not susceptible to environmental conditions and can be stored in room temperature.

L'invention concerne un dispositif capable de présenter une dépendance au temps et à la température, comprenant une couche supérieure supportant un premier réactif sélectionné un groupe de matériaux, tels que des agents de chélation, et une couche inférieure supportant un second réactif destiné à réagir avec le premier lors d'un déclenchement. Une couche barrière est placée entre la couche supérieure et la couche inférieure. Une caractéristique visuelle est modifiée en fonction du temps et de la température une fois le déclenchement produit, le dispositif n'étant pas sensible aux conditions environnementales et pouvant être stocké à température ambiante.

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