Cavitated Polypropylene Films Having Improved Interfacial Adhesion
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United States of America Patent
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Issued Date -
Apr 11, 2013
app pub date -
Oct 6, 2011
filing date -
Oct 6, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided is an oriented, opaque polypropylene film, methods of making the oriented, opaque film, and methods of enveloping an article in a VFFS or HFFS unit using the film, the film comprising at least one core layer having a first and second side comprising polypropylene and from 2 wt % to 30 wt % calcium carbonate and from 0.5 wt % to 20 wt % of a whitening agent, each based on the weight of the core layer materials; at least one skin layer adhered to each of the first and second sides of the core layer; wherein the film possesses a density within the range from 0.65 g/cc to 0.88 g/cc and an interfacial adhesion of at least 600 g/inch.
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