LAMINATED POLYESTER FILM AND MAGNETIC RECORDING MEDIUM

LAMINATED POLYESTER FILM AND MAGNETIC RECORDING MEDIUM

A laminated polyester film excellent in blocking resistance and processing suitability and exhibiting excellent electromagnetic transducing characteristics and excellent travel durability, when processed into a magnetic recording medium, and an electromagnetic recording medium using the laminated po...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ISHIDA, TAKESHI, MUROOKA, HIROFUMI, KOSUGE, MASAHIKO
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PHYSICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:A laminated polyester film excellent in blocking resistance and processing suitability and exhibiting excellent electromagnetic transducing characteristics and excellent travel durability, when processed into a magnetic recording medium, and an electromagnetic recording medium using the laminated polyester film as a base film, are provided. This laminated polyester film comprises a polyester layer B containing a cyclic trimer in an amount of not more than 0.8 percent by weight, having a terminal carboxyl group concentration of not more than 35 eq/10 g and containing inactive particles B having an average particle diameter of 50 to 100 nm, and a polyester layer A laminated to one side of the polyester layer B and not containing inactive particles or containing inactive particles A having a smaller average particle diameter than that of the inactive particles B.