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, and 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 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.

主权项

1. A time-temperature indicator comprising:
nanobeads comprising microorganisms that produce lactic acid using nutrients, an indicator that indicates a change in color by means of the produced lactic acid, an immobilization material that immobilizes the microorganisms and the indicator, and the nutrients, wherein the nanobeads contain the microorganisms; a base comprising an adhesive layer, wherein the adhesive layer is formed by cross-linking a first polymer having a butadiene skeleton part and a second polymer in the presence of an organic peroxide; and a cover film having a fixed water activity (Aw) and brought into contact with the nanobeads to activate the microorganisms.