THERMAL HISTORY DISPLAY MATERIAL

PROBLEM TO BE SOLVED: To provide a thermal history display material capable of accurately displaying thermal history (temperature - time history) of an article with hue change.SOLUTION: The thermal history display material sequentially includes: a first coating layer; a thermal history display layer...

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Hauptverfasser:	NISHIDA MITSUO, TSUJII YASUTO, NAKAJIMA NAOSHI, TOGAWA KEIICHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADHESIVES ADVERTISING CHEMISTRY CRYPTOGRAPHY DISPLAY DISPLAYING DYES EDUCATION LABELS OR NAME-PLATES LAKES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MEASURING MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PERFORMING OPERATIONS PHYSICS POLISHES SEALS SIGNS TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a thermal history display material capable of accurately displaying thermal history (temperature - time history) of an article with hue change.SOLUTION: The thermal history display material sequentially includes: a first coating layer; a thermal history display layer in which an associative fluorescent dye having a fluorescent wavelength varying between an excimer state and a monomer state is fixed in a specific molecular dispersion state; and a second coating layer. When the thermal history display layer is kept at a temperature of a specific temperature or higher for a certain time or longer, the thermal history display layer discolors from an initial hue to a hue different from the initial hue. The thermal conductivity of the first coating layer at 25°C is 1×10W/mK or lower. 【課題】色相変化によって、物品の熱履歴（温度−時間経歴）を正確に表示することのできる熱履歴表示材を提供する。【解決手段】第１の被覆層と、エキシマー状態とモノマー状態とで異なる蛍光波長を有する会合性の蛍光染料が特定の分子分散状態で固定されている熱履歴表示層と、第２の被覆層とをこの順に含み、熱履歴表示層は、特定温度以上の温度で一定時間以上保持されたときに、初期の色相とは異なる色相に変色する層であり、第１の被覆層の２５℃における熱伝導性が１?１０4Ｗ／ｍ2Ｋ以下である熱履歴表示材が提供される。【選択図】図１