LAMINATED POLYESTER FILM

• Main Authors: KAWASAKI YASUSHI, KAWASAKI YOICHI, KATO YUZO
• Format: Patent
• Language: English; Japanese
• Published: 18.02.2016
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a polyester film that can be suitably used, for example, for a film member for a transparent electrode of a touch panel or the like or a member of a molding film or the like, for such purposes requiring excellent adhesiveness, reduction of interferential irregularity due to reflection of external light after various surface functional layers such as a hard coat layer are formed, and reduction of a precipitation amount of an ester cyclic trimer due to heating.SOLUTION: A laminated polyester film is provided, to be used for making a pattern of a transparent conductor invisible, and the film includes a coating layer formed from a coating liquid containing a metal oxide and a crosslinking agent on one surface of a polyester film. When the other surface of the film is heat treated at 180°C for 10 minutes, a precipitation amount of an ester cyclic trimer on the surface is 1.0 mg/mor less.SELECTED DRAWING: None 【課題】 優れた密着性、ハードコート層等の各種の表面機能層が形成された後の外光反射による干渉ムラ軽減、および加熱によるエステル環状三量体の析出量の低減が必要な用途、例えば、タッチパネル等の透明電極用のフィルム部材、成形用フィルム等の部材等に好適に利用することができるポリエステルフィルムを提供する。【解決手段】 透明導電のパターニングを不可視化する用途に用いられる積層ポリエステルフィルムであり、金属酸化物および架橋剤を含有する塗布液から形成された塗布層をポリエステルフィルムの一方の面に有し、もう一方の面を１８０℃で１０分間熱処理したときの表面へのエステル環状三量体の析出量が１．０ｍｇ／ｍ２以下であることを特徴とする積層ポリエステルフィルム。【選択図】 なし