Packaging film having oxygen barrier
AssigneeAmcor Flexibles North America, Inc.
InventorAnkush A. GOKHALE
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Abstract
A non-shrink, irradiated packaging film includes first, second, third, and fourth layers of polyamide (PA); a first polyethylene vinyl alcohol (EVOH) layer between the first and second PA layers; a second EVOH layer between the third and fourth PA layers; a mid-layer between the second and third PA layers; and first and second polyethylene (PE) layers. The first, second, third, and fourth PA layers, the first and second EVOH layers, and the mid-layer are between the first and second PE layers. The mid-layer may be formed from a polymer.
Claims20
A non-shrink, irradiated packaging film comprising:
- first, second, third, and fourth layers of polyamide (PA);
- a first polyethylene vinyl alcohol (EVOH) layer between the first and second PA layers;
- a second EVOH layer between the third and fourth PA layers;
- a mid-layer between the second and third PA layers, the mid-layer comprising a polymer;
- and
- first and second polyethylene (PE) layers, wherein the first, second, third, and fourth PA layers, the first and second EVOH layers, and the mid-layer are between the first and second PE layers.
A method for manufacturing a non-shrink, irradiated packaging film, comprising:
- coextruding first, second, third, and fourth layers of polyamide (PA), first and second layers of polyethylene vinyl alcohol (EVOH);
- a mid-layer, and first and second polyethylene (PE) layers to produce a first film in which:
- the first EVOH layer is between the first and second PA layers,
- the second EVOH layer is between the third and fourth PA layers,
- the mid-layer is between the second and third PA layers, and
- the first, second, third, and fourth PA layers, the first and second EVOH layers, and the mid-layer are between the first and second PE layers;
- and
- exposing the first film to ionizing radiation to produce an ionized first film.
Dependencies are inferred from the claim text.