| 摘要 |
PROBLEM TO BE SOLVED: To provide a time-temperature indicator excellent in constitutional simplicity and capable of indicating both the temperature of an article to be indicated and elapsed time at that temperature. SOLUTION: The time-temperature indicator includes a polymer composition comprising a polymer and a dye. The polymer composition has the dye fixed in a specific molecular dispersion state in the polymer. When the indicator is kept at a specific temperature or higher for at least a predetermined time, it changes its color to a hue different from the initial hue thereof. COPYRIGHT: (C)2010,JPO&INPIT |
