MULTILAYER FILM COMPRISING A CONTACT LAYER, CORE LAYER AND OUTER LAYER FOR THE WALL OF A SINGLE-USE POUCH
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United States of America Patent
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Nov 26, 2015
app pub date -
Jan 17, 2014
filing date -
Jan 18, 2013
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Abstract
A multilayer film includes a contact layer, a core layer, and an outer layer, the contact and core layers being integral with a first tie layer; and the outer and core layers being integral with a second tie layer; the contact layer includes a copolymer of ethylene and α-olefin having a density from 0.870 to 0.910 g/cm3, alone or in mixture with a polyolefin having a density from 0.910 to 0.940 g/cm3; the core layer includes a flex-crack resistant ethylene vinyl alcohol copolymer having an ethylene content from 25 to 48 mol % or a mixture of an ethylene vinyl alcohol copolymer having an ethylene content from 25 to 48 mol %, and an ionomer acid ethylene copolymer; the outer layer includes a polyolefin having a density from 0.910 to 0.940 g/cm3, alone or in mixture with a copolymer of ethylene and α-olefin having a density from 0.870 to 0.910 g/cm3.
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