Solvent blockers and multilayer barrier coatings for thin films
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United States of America Patent
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Jul 6, 1993
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N/A
app pub date -
May 21, 1992
filing date -
Aug 10, 1990
priority date (Note) -
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Abstract
A film comprising alternating layers of polyvinylidene chloride resin and a solvent barrier such as polyvinyl alcohol provides superior barrier properties. Barrier and mechanical properties are enhanced when formulation additives are present at customary levels only in the outermost layers.
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