Sealable Polypropylene Films With Enhanced Stability
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United States of America Patent
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Issued Date -
Aug 8, 2013
app pub date -
Dec 12, 2012
filing date -
Feb 2, 2012
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Abstract
A multi-layered sealable film and method of storing and transporting a role of the film without buckling or starring, the film comprising a core layer comprising polypropylene sandwiched between at least a first and (optionally) second tie-layer on either side of the core; a sealable layer with two sides, one side adhered to the first tie-layer; wherein at least the first tie-layer comprising a blend of polypropylene and within the range of from 5 wt % to 40 wt % of a soft polymer additive, preferably a propylene-α-olefin elastomer having within the range of from 10 wt % to 30 wt % α-olefin derived units, wherein the blend is preferably partially or completely immiscible. A roll of the inventive films can be readily stored and transported without loss due to film defects.
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