BASE FILM FOR MAGNETIC RECORDING MEDIUM

PURPOSE:To prevent the generation of a change in surface characteristic by heating by providing special structure which can be partially melted at a specific temp. to a PE terephthalate film which is a base layer. CONSTITUTION:The PE terephthalate which is obtd. by the condensation polymn. from, for...

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Bibliographische Detailangaben
Hauptverfasser:	TSUNASHIMA KENJI, HOTTA KUNIHIRO, ITOYAMA KUNIYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent the generation of a change in surface characteristic by heating by providing special structure which can be partially melted at a specific temp. to a PE terephthalate film which is a base layer. CONSTITUTION:The PE terephthalate which is obtd. by the condensation polymn. from, for example, an ethylene glycol and terephthalic acid is used as an essential component. The component of which the partial melting temp. Tp is in a 90-120 deg.C, more preferably 95-110 deg.C range is used. The coefft. of friction by the contact of the back surface of a magnetic recording medium with a guide consisting of a metal, etc. is increased in long-time running and tape squeaking, partial exfoliation of the magnetic layer, etc. are caused if the Tp is