Temperature traceable indicator and method for manufacturing same
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United States of America Patent
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Jun 9, 2020
Grant Date -
Feb 15, 2018
app pub date -
Jan 29, 2016
filing date -
Mar 30, 2015
priority date (Note) -
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Abstract
The purpose of the present invention is to provide a temperature traceable indicator capable not only of displaying temperature history, but also adding other additional information. To that end, a temperature traceable indicator according to the present invention is provided with a base material and a temperature indicating laminate disposed on the base material, and is characterized in that the temperature indicating laminate is provided with a coloring layer including a color former, a color developing layer including a color developer for inducing the coloration of the color former, and a barrier layer disposed between the coloring layer and color developing layer, and the barrier layer includes a barrier agent that is immiscible with the color developer, is frozen at a first temperature, and melts beyond a second temperature so as to allow the color developer to become diffused in the coloring layer so that color is produced.
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