Biaxially oriented polypropylene-base film

A biaxially oriented polypropylene-base film which is excellent in the straight cuttability in the machine direction, the strength in the transverse direction, and transparency and economically advantageous can be produced by biaxially stretching a film-forming material which comprises 40 to 88 wt....

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Bibliographische Detailangaben
Hauptverfasser:	SHIRAISHI, YASUHIRO, ISHIMOTO, YUYA, OKAYAMA, CHIKASHI, SAITO, NORIAKI, NAKASHIMA, TAKANORI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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 USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	A biaxially oriented polypropylene-base film which is excellent in the straight cuttability in the machine direction, the strength in the transverse direction, and transparency and economically advantageous can be produced by biaxially stretching a film-forming material which comprises 40 to 88 wt. % of crystalline polypropylene and 60 to 12 wt. % of a propylene--olefin copolymer, the copolymer being dispersed in the crystalline polypropylene in the form of particles, in such a way as to give an oriented film wherein the dispersed particles of the copolymer have a mean particle diameter of 0.1 mu m or below in the transverse direction.