DELUSTERED BIAXIALLY DRAWN POLYPROPYLENE FILM AND ITS PREPARATION

PURPOSE: To obtain a multilayered propylene film, the matt appearance of which is imparted through the provision of a polymer mixture coextruded on one side of the film. CONSTITUTION: A matt layer M has a thickness of 0.5-5.0 μm and a composition consisting of 15-40% randam copolymer and/or terpolym...

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Bibliographische Detailangaben
Hauptverfasser:	TOOMASU BURUMU, ANTON KURARUMAN, INGO SHINKERU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 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 METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS 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:	PURPOSE: To obtain a multilayered propylene film, the matt appearance of which is imparted through the provision of a polymer mixture coextruded on one side of the film. CONSTITUTION: A matt layer M has a thickness of 0.5-5.0 μm and a composition consisting of 15-40% randam copolymer and/or terpolymer manufactured from propylene/ethylene/butylene mainly containing 25-75% of one kind or more of polypropylene/polyethylene block copolymer, 5-15% copolymer or terpolymer based on the ethylene modified by a polar group and balance propylene, 5-20% high-density polyethylene and 0-5% natural or synthetic silica. Molten matters corresponding to respective layers of a film are co-extruded through a mouthpiece.