WHITE POLYESTER FILM AND REFLECTING SHEET

PROBLEM TO BE SOLVED: To provide a white polyester film achieving both of high reflectance and high masking property, less likely tearing and having high productivity, so as to solve problems in the prior art.SOLUTION: The white polyester film includes a pore inside; and the film is composed of a re...

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Hauptverfasser:	TAKAHASHI KOZO, FUJII HIDEKI, HIRAOKA TOSHIHIKO, TANAKA KAZUNORI, YOSHIDA TATSURO, UEDA TAKASHI, OKUDA MASAHIRO
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 LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a white polyester film achieving both of high reflectance and high masking property, less likely tearing and having high productivity, so as to solve problems in the prior art.SOLUTION: The white polyester film includes a pore inside; and the film is composed of a resin and has a layer formed by using a polyester resin and a cyclic olefin copolymer resin. In a cross-section of the layer, a pore rate is more than 25% and 75% or less. The number average particle diameter of the cyclic olefin copolymer resin in the film is 0.1 μm or more and 3 μm or less.