Oxygen, flavor/odor, grease/oil and moisture barrier film struct

Stock material or miscellaneous articles – Hollow or container type article – Nonself-supporting tubular film or bag

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426127, 427471, 427536, 427209, 427223, 427307, 427322, 4274121, 4274123, 4274125, 428 367, 4284761, 428483, 428500, 428518, 428910, B32B 2700, B32B 2716, B32B 2726, B32B 3300

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active

055123384

ABSTRACT:
A polymeric film structure having improved oxygen, flavor/odor, grease/oil and moisture barrier characteristics is disclosed. The structure includes a polymeric core sandwiched between an oxygen barrier on one side thereof and a moisture barrier on the other side of the polymeric core. The oxygen barrier includes polyvinyl alcohol cross-linked with aldehyde containing cross-linking agents in the presence of a catalytic amount of an inorganic acid, preferably sulfuric acid. The moisture barrier is a coating of polyvinylidene chloride, which also enhances the oxygen barrier of the polymeric film structure.

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