FILMS WITH RETORT-SHOCK RECOVERY

FILMS WITH RETORT-SHOCK RECOVERY

A multilayer barrier film for food packaging comprises an outer layer comprising a first polymeric material having a moisture vapor transmission rate (MVTR) of greater than or equal to 10 gram·mil/100 in2/day; a first inner layer adjacent to the outer layer, the first inner layer comprising a first...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LAMB, James, R, GOKHALE, Ankush, A
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
PERFORMING OPERATIONS
TRANSPORTING
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Beschreibung
Zusammenfassung:A multilayer barrier film for food packaging comprises an outer layer comprising a first polymeric material having a moisture vapor transmission rate (MVTR) of greater than or equal to 10 gram·mil/100 in2/day; a first inner layer adjacent to the outer layer, the first inner layer comprising a first retortable grade ethylene vinyl alcohol (EVOH) copolymer; a second inner layer adjacent to the first inner layer, the second inner layer comprising a second polymeric material having a moisture vapor transmission rate (MVTR) of greater than or equal to 10 gram·mil/100 in2/day; a third inner layer adjacent to the second inner layer, the third inner layer comprising a second retortable grade EVOH copolymer; and a sealing layer adjacent to the third inner layer; wherein the first polymeric material is not a retortable grade EVOH copolymer. Excellent recovery of oxygen barrier over time is achieved by these films and retortable containers made therefrom.