Time temperature indicator

摘要

The present invention is generally in the field of measuring and indicating techniques and relates to a time-temperature indicator and methods of manufacturing and use thereof. More specifically, the time-temperature indicator comprises at least one metal layer or metal containing layer, and in direct contact to the metal layer or to the metal containing layer at least one pad member affixed onto a pad carrier layer,;wherein the pad member comprises a pad made of an absorbent material and a dopant medium, whereby the dopant medium comprises a liquid medium or a viscous medium or a viscoelastic medium which is doped with a dopant that destroys the metal/metal containing layers such as an acid, a base or a salt or a photolatent acid or a photolatent base.

主权项

1. A time temperature indicator, comprising:
a) a metal layer or metal containing layer; and b) in direct contact with the metal layer or the metal containing layer, at least one pad member affixed onto a pad carrier layer, wherein the pad member comprises a pad made of an absorbent material and a dopant medium, wherein the dopant medium comprises a liquid medium or a viscous medium or a viscoelastic medium, which liquid/viscous/viscoelastic medium includes as a component a dopant able to destroy the metal/metal containing layers, wherein, when said metal layer is part of a capacitive device with two capacitor plates and a dielectric/insulating layer therebetween, the pad member is not part of the dielectric/insulating layer between the conductive layers of the capacitive device.