Composite film structure for manufacturing pouches using rotary thermic sealing
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United States of America Patent
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Issued Date -
Mar 31, 2005
app pub date -
Nov 22, 2004
filing date -
Oct 19, 2001
priority date (Note) -
Abandoned
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Abstract
A sealant layer for use in a composite film structure, which includes at least one non-melting layer, the structure being for manufacturing pouches for containing flowable material utilizing high speed vertical form, fill and seal processes with rotary thermic sealing, the sealant layer comprising from about 70 to about 90% by weight of a single-site catalyst C.sub.4-C.sub.10 ethylene alpha-olefin polymer having a density in the range of from 0.890 to about 0.912 gm/cc and a melt index in the range of from about 0.2 to about 2.0 dg/cc, and from about 10 to about 30% by weight of one or more of the following: a linear low density polyethylene selected from single-site catalyst and multi-site catalyst polymers, the polyethylenes having a density in the range of from about 0.916 to about 0.930 gm/cc, a high pressure low density polyethylene and processing additives.
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