BIAXIALLY STRETCHED POLYESTER FILM

Provided is a polyester film that is excellent in stiffness and transparency, and that is suitable for producing molded articles, labels, optical films, and the like. A biaxially stretched polyester film comprises a polyester resin (I) comprising terephthalic acid and ethylene glycol as main constit...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHIMIZU, Akira, MATSUMURA, Mei
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY DYES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PAINTS PHYSICS POLISHES USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	Provided is a polyester film that is excellent in stiffness and transparency, and that is suitable for producing molded articles, labels, optical films, and the like. A biaxially stretched polyester film comprises a polyester resin (I) comprising terephthalic acid and ethylene glycol as main constituent components, the polyester resin (I) having a recrystallization temperature obtained by DSC of 160° C. or more and 193° C. or less, the polyester resin (I) being contained in an amount of 60 mass % or more based on 100 mass % of the entire film, the film having a tensile modulus of elasticity of 3200 MPa or more both in a longitudinal direction and a width direction, and the total tensile modulus of elasticity in the longitudinal direction and the width direction being 7000 MPa or more.