Abstract
A CO2-sensitive, smart adhesive is reported in which a CO2-sensitive pigment, comprising the pH-sensitive dye, phenol red, PR, coated onto nano-particulate silica particles, is dispersed in a hot melt, pressure sensitive adhesive. A CO2-sensitive, brightly coloured adhesive tape is produced by coating the smart adhesive onto a polymer 'barrier' film substrate. When placed inside on the plastic lidding of a CO2 MAPed package, the smart adhesive-based indicator changes to an orange/yellow colour due to the presence of the CO2, and returns to its original deep purple colour upon exposure to air, at a rate that depends upon temperature and the CO2 permeability and thickness of the polymer barrier film. The smart adhesive tape is used as a 'consume within', CW, indicator for refrigerated goods and briefly compared in performance to the more complex 'After Opening Freshness' indicator produced recently by Insignia Technologies Ltd. Other potential time-temperature applications of this new technology are discussed briefly.
Original language | English |
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Article number | 100395 |
Number of pages | 8 |
Journal | Food Packing and Shelf Life |
Volume | 22 |
Early online date | 16 Sep 2019 |
DOIs | |
Publication status | Published - 07 Dec 2019 |
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A Smart Adhesive 'Consume Within' (CW) Indicator for Food Packaging
Mills, A. (Creator), Yusufu, D. (Creator) & Wang, C. (Creator), Queen's University Belfast, 16 Sep 2019
DOI: 10.17034/61ca3f44-8a92-419d-90c8-176f08c524a4
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