GAS-BARRIER SHRINK FILMS AND THEIR USE IN DEEP-DRAWING APPLICATIONS

A multi-layer, gas-barrier, biaxially oriented and heat-shrinkable film comprising a) a first outer heat-sealable layer b) an inner gas-barrier layer, and c) a second outer abuse resistant layer that contains at least 28 % by weight of polystyrene polymer, preferably mad e up for a major proportion...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PALEARI, MARIO, RE FRASCHINI, MARCO, URSINO, FELICE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 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 GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HANDLING THIN OR FILAMENTARY MATERIAL INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING UNPACKING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A multi-layer, gas-barrier, biaxially oriented and heat-shrinkable film comprising a) a first outer heat-sealable layer b) an inner gas-barrier layer, and c) a second outer abuse resistant layer that contains at least 28 % by weight of polystyrene polymer, preferably mad e up for a major proportion by a high styrene styrene-butadiene block copolymer, in the second outer abuse-resistant layer c) and/or in one or more inner layers positioned between the first outer heat-sealable layer a) and the inner gas-barrier layer b) and/or in one or more inner layers positioned between the gas-barrier layer b) and the second oute r abuse layer c). The film of the invention showed to be particularly suitable to be deep- drawn to form a flexible container in a packaging process where the end vacuum lidded package is heat--shrunk.