BIAXIALLY ORIENTED POLYESTER FILM

PURPOSE:To obtain a biaxially oriented polyester film having high modulus and excellent dimensional stability, by blending two polyesters and molding the blend into a film having a specified coefficient of face orientation and a specified crystalline size. CONSTITUTION:The titled film is obtd. from...

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Bibliographische Detailangaben
Hauptverfasser:	MINAMI TOMOYUKI, HOTTA KUNIHIRO, ITOYAMA KUNIYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CABLES CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CONDUCTORS ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INSULATORS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS PRINTED CIRCUITS SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a biaxially oriented polyester film having high modulus and excellent dimensional stability, by blending two polyesters and molding the blend into a film having a specified coefficient of face orientation and a specified crystalline size. CONSTITUTION:The titled film is obtd. from a blend of a polyester (A) composed of units of formulas I and II and a polyester (B) having a flow temp. of 200-350 deg.C and liquid crystal forming properties. The film is a biaxially oriented polyester film wherein the blending ratio of the polyester (B) is 1-15wt%, one face of the crystal of the polyester (A) is face-oriented in the film face, a coefficient of orientation of the crystal face is 0.75-0.95 and crystalline size in the direction of the crystal face is 40-75Angstrom . In the formula, n is 2,4 or 6 ; R is 2,6-naphthalene, a group of formula I or II. A polymer contg. structural units of formulas V and VI is particularly preferred as the polyester A.