SINGLE-LAYERED OR MULTI-LAYERED BIAXIALLY ORIENTED TRANSPARENT POLYESTER FILM WITH PERMANENT AQUEOUS ANTIFOG LAYER, TRANSPARENCY OF 93% OR MORE AND UV STABILITY
PROBLEM TO BE SOLVED: To provide a polyester film which is free of a remarkable yellowing, embrittlement, surface cracking, and severe deterioration of mechanical properties and optical properties in applications, and has permanent anti-fogging performance, transparency of 93% or more, and UV resistance of at least 5 years.SOLUTION: The present invention relates to a single-layered or multi-layered polyester film having a transparency of 93% or more, in which all of the film layers of the film contain a UV stabilizer, and the film has a permanent antifogging layer on at least one side thereof, and the permanent antifogging layer is a dried body of an aqueous coating dispersion. The aqueous coating dispersion contains a) 1 to 15 wt% (based on the aqueous coating dispersion) of an antifouling polymer and b) 3 to 15 wt% (based on the aqueous coating dispersion) of a hygroscopic porous material based on the applied dispersion. There are also provided a preparation method therefor and an application thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】 顕著な黄変、脆化、表面の亀裂、用途において重大な機械的、光学的性質の悪化が無く、永続性防曇性能と、９３％以上の透明度と、少なくとも５年の耐ＵＶ性を有するポリエステルフィルムを提供する。【解決手段】 本発明は、透明度が９３％以上である単層または多層ポリエステルフィルムであって、当該フィルムの全てのフィルム層はＵＶ安定剤を含有し、当該フィルムは永続性防曇層を少なくとも片面に有し、永続性防曇層は水性塗布分散体の乾燥体であり、当該水性分散体が、ａ）１～１５重量％（塗布分散体を基準として）の防汚ポリマー及びｂ）３～１５重量％（塗布分散体を基準として）の吸湿性多孔質物質を含有することを特徴とする単層または多層ポリエステルフィルムに関する。更に本発明は、当該フィルムの製造方法および使用に関する。【選択図】なし
