TIME-TEMPERATURE INDICATOR, METHOD FOR MANUFACTURING THE TIME-TEMPERATURE INDICATOR, QUALITY GUARANTEE SYSTEM USING THE TIME-TEMPERATURE INDICATOR, AND QUALITY GUARANTEE METHOD USING THE QUALITY GUARANTEE SYSTEM

摘要

The present invention relates to a two-dimensional code-type time-temperature indicator the color or shape of which changes in accordance with time and temperature conditions. The present invention also relates to a method for manufacturing the time-temperature indicator, to a quality guarantee system using the time-temperature indicator, and to a quality guarantee method using the quality guarantee system. The time-temperature indicator of the present invention comprises: nanobeads containing a microorganism for generating lactic acids using nutrient components, an indicating agent for indicating the change in color by means of the generated lactic acids, an immobilization material for immobilizing the microorganism, the indicating agent, and the nutrient components; a base having a bonding layer; and a cover film which contacts the microorganism and the base so as to activate the nanobeads, and which has a fixed water activity (Aw). According to one embodiment of the present invention, whether or not spoilage of a product has started due to an exposure to the temperature or time condition other than an allowed range can be advantageously checked in a quick and accurate manner.