Anti-microbial packaging materials and methods for making the same
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United States of America Patent
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app pub date -
Jan 26, 2004
filing date -
Nov 2, 2001
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Abstract
Zeolite-containing dispersions used to place an anti-microbial coating onto packaging materials are disclosed. The dispersions can be either water or solvent based and include a) a polymer having an acid number of less than about 200, and b) from about 0.5% to about 10% by weight zeolites containing anti-microbial metal ions. The zeolites have a particle size of between about 2 and about 7 microns and a pore size of between about 3 and about 5 Angstroms. The dispersions can be printed onto various packaging materials to render them anti-microbial. After drying onto packaging material, the zeolites release anti-microbial metal ions, such as silver ions, on exposure to moisture.
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