Plastic Packaging, Particularly Flexible Tubes, Containing Reactive Substances Associated With A Presence Indicator
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United States of America Patent
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Issued Date -
Jan 7, 2010
app pub date -
Jan 6, 2006
filing date -
Jan 10, 2005
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Abandoned
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Abstract
A packaging component, having a wall including a layer for direct contact with a product contained within the packaging, said layer formed of an organic polymer having disposed therein 1) a first material reactive with at least one component of the product contained within the packaging or with a physical or chemical contaminant thereof, and 2) a second component in the form of particles which perturb or emit, naturally or under the influence of an artificial source of excitation, a physical field which is remotely detectable and which confirms that the first material is also present. The reactive substance is typically a substance having a biocidal effect, an organoleptic additive, an oxygen-absorbing agent, an emitter of carbon dioxide or sulfur dioxide, a humidity absorber, an antioxidant or a UV filter, and the physically active particles are typically ferromagnetic, x-ray absorbent, an MRI contrast agent, luminescent or thermochromic.
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