TEMPERATURE HISTORY INDICATOR

PROBLEM TO BE SOLVED: To provide a handy indicator that has improved durability such as water resistance, oil resistance, and light resistance, and stability, and can accurately display whether a specific temperature history is experienced or not by the change in irreversible, clear color tone. SOLU...

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Bibliographic Details
Main Author MIYATA YOSHIE
Format Patent
LanguageEnglish
Published 08.05.2003
Edition7
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
MEASURING
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
PHYSICS
POLISHES
TESTING
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Summary:PROBLEM TO BE SOLVED: To provide a handy indicator that has improved durability such as water resistance, oil resistance, and light resistance, and stability, and can accurately display whether a specific temperature history is experienced or not by the change in irreversible, clear color tone. SOLUTION: In the temperature history indicator, a thermally sensitive discoloration layer including a granular or powder-like heat-meltable substance having a melt point equivalent to a temperature to be recorded, a granular or powder- like coloring matter that is dispersed or dissolved into the heat-meltable substance for diffusion, and an ink vehicle where the heat-meltable substance is dispersed is attached to a substrate and is covered with a photo-setting resin.
Bibliography:Application Number: JP20010323258