C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/02 (2006.01) B65D 81/24 (2006.01) G01N 21/78 (2006.01) G01N 31/22 (2006.01) B32B 7/02 (2006.01)
Patent
CA 2393393
An ink composition for sensing carbon dioxide gas contains a pH indicator, binder, and solvent and allows easy visual observation of color changes of an indicating portion caused by the concentration of carbon dioxide gas. When this ink composition is applied to a carbon dioxide indicator and package, a pinhole and poor seal of a gas-replaced package sealing a replacement gas which contains carbon dioxide gas are easily found.
L'invention porte sur une composition d'encre détectant le CO2, comportant un indicateur de pH, un liant, et un solvant. La partie de l'indicateur contenant ladite composition subit un changement de couleur facile à observer visuellement lorsque la teneur en CO2 varie. L'utilisation de ladite composition dans un détecteur de CO2 et dans un appareil permet de vérifier simplement et aisément la présence d'un trou ou d'un défaut d'étanchéité dans un paquet rempli de CO2 en vue de son remplacement.
Hamazaki Shin
Honda Hiroshi
Mizuma Hiroyuki
Obinata Noe
Ochiai Shinya
Fetherstonhaugh & Co.
Otsuka Pharmaceutical Factory Inc.
Toppan Printing Co. Ltd.
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