MAGNETIC RECORDING ITEM

PURPOSE:To obtain titled item of high dimensional stability to moisture absorption, by providing a magnetic layer on a flexible substrate constituted by a polyester with specific intrinsic viscosity, the amounts of the terminal hydroxyl and carboxyl groups totalling a specific value or lower, also f...

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Bibliographische Detailangaben
Hauptverfasser:	KAWASE SHIYOUJI, INADA HIROO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING 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 MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain titled item of high dimensional stability to moisture absorption, by providing a magnetic layer on a flexible substrate constituted by a polyester with specific intrinsic viscosity, the amounts of the terminal hydroxyl and carboxyl groups totalling a specific value or lower, also free from hydrophilic group. CONSTITUTION:A polyester (mainly constituted by a recurring unit such as ethylene terephthalate) with an intrinsic viscosity >=0.4, the amounts of the terminal hydroxyl and carboxyl groups totalling