BIAXIALLY ORIENTED POLYESTER FILM AND MAGNETIC RECORDING MEDIUM

PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film which, when formed into a magnetic recording medium, hardly causes a dimensional change due to an environmental change, is excellent in storage stability, also is excellent in surface properties, and has preferable travelling prope...

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Bibliographische Detailangaben
Hauptverfasser:	HIGASHIOJI TAKUJI, HORIE MASAHITO
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 INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS PHYSICS 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 oriented polyester film which, when formed into a magnetic recording medium, hardly causes a dimensional change due to an environmental change, is excellent in storage stability, also is excellent in surface properties, and has preferable travelling properties and electromagnetic conversion characteristics. SOLUTION: The biaxially oriented polyester film having a layer constitution of at least two layers has at least one layer (R layer) containing inactive particles of 0.2 to 3 mass%, wherein a Young modulus in the width direction is 7.5 to 15 GPa and a creep compliance at 50°C, 30 min under load of 28 MPa in a longitudinal direction is 0.10 to 0.35 GPa-1. COPYRIGHT: (C)2011,JPO&INPIT