BIAXIALLY STRETCHED MULTILAYER POLYPROPYLENE FILM

PROBLEM TO BE SOLVED: To provide a biaxially stretched multilayered polypropylene film excellent in thickness accuracy and having stable gas barrier properties and moistureproof properties. SOLUTION: The biaxially stretched multilayer polypropylene film is formed by laminating a vinylidene chloride...

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Bibliographische Detailangaben
1. Verfasser:	NEGISHI KAZUHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 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 PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a biaxially stretched multilayered polypropylene film excellent in thickness accuracy and having stable gas barrier properties and moistureproof properties. SOLUTION: The biaxially stretched multilayer polypropylene film is formed by laminating a vinylidene chloride polymer layer (C) on at least one surface of a biaxially stretched film substrate layer obtained from a propylene polymer composition which comprises a propylene homopolymer (A) with an α-olefin content of 0.1-1.8 mol % and a propylene/α-olefin copolymer (B) or comprises 97-75 wt.% of the propylene polymer composition and 3-25 wt.% of the tackifier. COPYRIGHT: (C)2004,JPO