Layered film compositions, packages prepared therefrom, and methods of use
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United States of America Patent
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Sep 11, 2012
Grant Date -
Aug 28, 2008
app pub date -
Jul 7, 2006
filing date -
Jul 8, 2005
priority date (Note) -
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Abstract
The invention relates to a perforated film composition, comprising at least three layers, and wherein at least one layer is a inner layer with a softening and/or melting temperature, lower than the respective softening and/or melting temperatures of at least two outer layers, located at opposite surfaces of the inner layer, and where upon exposure to elevated temperature, the inner layer softens or melts to such an extent, that upon exposure to a compression force, a sufficient number of perforations seal in the inner layer, to impart an increased moisture barrier to the overall film composition. The invention also relates to a method of forming such a perforated film composition, packages prepared from the same, and a method of filling packages prepared from the perforated film composition.
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