METHOD OF PREPARING A BARRIER FILM FOR BLISTER PACKS
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United States of America Patent
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Issued Date -
Oct 8, 2015
app pub date -
Dec 16, 2013
filing date -
Dec 20, 2012
priority date (Note) -
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Abstract
A method for preparing a barrier film includes the steps of providing a substrate; applying in a single coating step a polymer latex on the substrate to form a single layer of the polymer on the substrate; and drying the single layer of the polymer; characterized in that the single layer has a dry coating weight (DCW) of at least 20 g/m2 of polymer and is dried at a dry temperature (Td) of at least the film formation temperature (Tf) of the polymer latex at a relative humidity (RH) according to the following formula:
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