TEMPERATURE-SENSITIVE LABEL

摘要

A temperature-sensitive label is described. The temperature-sensitive label has a temperature-sensitive system having a filiform shape memory member that has a first end portion having a terminal part fixedly secured to a first contact member, a second end portion having a terminal part restrained by a second contact member in a non-permanent way, and a central curved portion. The central curved portion is in the martensitic phase while the first and second portions are in the austenitic phase at a same environmental temperature above a critical threshold temperature to be monitored by the label such that in case of exposure to a temperature lower than the preset critical threshold temperature the end portions of the filiform shape member perform a phase transition, from austenitic phase to martensitic phase, which causes its irreversible disengagement from the restraint formed by the second contact member. The disengagement condition is optionally visible, for example, through a transparent window and/or monitored by an RFID system.

主权项

1. A temperature-sensitive label, comprising:
at least one temperature-sensitive system comprising:
a filiform shape memory member that has a first end portion lying along a first direction and a second end portion lying along a second direction and a central curved portion connecting said first portion with said second portion, the first portion having a terminal part fixedly secured to a first contact member and the second portion having a terminal part restrained by a second contact member in a non-permanent way,wherein said central curved portion is in the martensitic phrase which the first and second portions are in the austenitic phase at a same temperature above a critical threshold temperature to be monitored by the label.