Multilayer barrier structures, methods of making the same and packages made therefrom

• Main Authors: DUANE H. BUELOW, ROBERTO PASCUAL CASTELLANI, CHAD D. MUELLER, MICHAEL J. DOUGLAS, ROBERT J. BLEMBERG
• Format: Patent
• Language: English
• Published: 05.08.2010
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; BLASTING; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; FOODS OR FOODSTUFFS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HANDLING THIN OR FILAMENTARY MATERIAL; HEATING; HUMAN NECESSITIES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS; MECHANICAL ENGINEERING; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT,VEGETABLES, EDIBLE SEEDS; STORING; THE PRESERVED, RIPENED, OR CANNED PRODUCTS; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES; THERMAL INSULATION IN GENERAL; TRANSPORTING; UNPACKING; WEAPONS

There is disclosed herein a multilayer structure for packaging bone-in meat comprising: an outer layer comprising linear low density polyethylene; a first polyamide layer comprising a blend of about 70% by weight to about 99% by weight semi-crystalline polyamide and about 1% by weight to about 30% by weight amorphous polyamide; a first tie layer disposed between said outer layer and said first polyamide layer; a barrier layer disposed adjacent said first polyamide layer wherein said barrier layer comprises ethylene vinyl alcohol copolymer having an ethylene content of about 27 mol % to about 42 mol %; a second polyamide layer disposed adjacent said barrier layer comprising a blend of about 70% by weight to about 99% by weight semi-crystalline polyamide and about 1% by weight to about 30% by weight amorphous polyamide; a sealant layer comprising linear low density polyethylene; and a second tie layer disposed between said sealant layer and said second polyamide layer, wherein the multilayer structure is biaxially oriented using a double bubble process whereby each layer of the multilayer structure is coextruded as a bubble, cooled, then reheated and oriented in both the longitudinal and transverse directions, and wherein the multilayer structure comprises a total orientation factor between about 8 and about 13.