Method for producing a multi-layer composite film, multi-layer composite film and use thereof

The present claim relates to a method for producing a multi-layer composite film comprising the step of co-extruding at least three layers (a), (b) and (c), from which the layer (a) forms an outer surface of the composite film; the layer (c) forms a surface of the composite film that comes into cont...

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Bibliographische Detailangaben
1. Verfasser:	SCHIFFMANN, Jürgen Michael
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 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 METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The present claim relates to a method for producing a multi-layer composite film comprising the step of co-extruding at least three layers (a), (b) and (c), from which the layer (a) forms an outer surface of the composite film; the layer (c) forms a surface of the composite film that comes into contact therewith or faces the product to be packaged; and the layer (b) is arranged between the layer (a) and the layer (c). The method also comprises the step of bi-axially drawing the co-extruded composite film. Layer (a) contains a thermoplastic resin or is made thereof. Layer (b) contains a polyvinyl chloride (PVdC)- resin or is made thererof. Layer (c) contains a resin, preferably sealable, in particular a heat-sealable resin or is made therefrom. As a result, there is no cross-linking of the composite film by means of radio-active radiation, in particular by means of beta, gamma, x-ray and/or electron radiation, during the production of the composite film and after.