| 摘要 |
PROBLEM TO BE SOLVED: To provide a temperature-sensing material which can be used repeatedly, and to easily detect whether the temperature has become higher than a predetermined temperature for articles, such as foods or the like, set in a circulation process or the like. SOLUTION: Using the temperature-sensing material 10, in which a magnetic powder consisting of a magnetic material is fixed using a fixing material having melting point of a predetermined temperature, the magnetic powder is made to be magnetized in a fixed direction, under the condition, to which the magnetic powder in the temperature sensing material 10 is made to fix by the fixing material. The change in the magnetic flux, due to the magnetic powder based on the melting of the fixing material, is detected. COPYRIGHT: (C)2005,JPO&NCIPI
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