LAMINATED PACKAGING MATERIAL, ITS PRODUCTION METHOD AND PACKAGE

• Main Authors: PENTTINEN TAPANI, JAERVINEN JALLIINA, MAEAETTAE TERTTU, SALSTE MATTI, KUUPPO TUOMO, SALMINEN RISTO
• Format: Patent
• Language: English
• Published: 25.01.2007
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; 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; HANDLING THIN OR FILAMENTARY MATERIAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a method of combination of EVOH and a polyamide in a laminated packaging material for a liquid foodstuff. SOLUTION: The laminated packaging material suitably used for heat-sealable packages for liquid foods, such as milk, cream and juice cartons, and a manufacturing method of the material and a food package manufactured from the material are disclosed. The material comprises a core of paper or cardboard, and oxygen- and aroma-proof barrier layers of EVOH and polyamide. The EVOH layer 5 and the polyamide layer 4 are jointed together directly without any intermediate adhesive layer, and the barrier layers and the core 3 are sandwiched between polymeric heat-sealing layers 2, 7 on both sides of the material. The material is manufactured by extrusion so that at least the materials of the barrier layers 4, 5 are placed against each other in a molten state and directed to the core 3 in one web. COPYRIGHT: (C)2007,JPO&INPIT