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1. (WO2017038472) POLYESTER FILM

Pub. No.:    WO/2017/038472    International Application No.:    PCT/JP2016/074044
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Aug 18 01:59:59 CEST 2016
IPC: C08J 5/18
Applicants: TORAY INDUSTRIES, INC.
東レ株式会社
Inventors: TATSUMI, Noriyuki
巽規行
SUZUKI, Tadamasa
鈴木維允
HIGASHIOJI, Takuji
東大路卓司
Title: POLYESTER FILM
Abstract:
In this polyester film, the ratio (optical density (OD)/thickness (T)) of the optical density to the thickness (μm) is 0.22-2.0, and the cooling crystallization temperature Tmc, as measured in differential scanning calorimetry (DSC) where the film is kept in a melted state for 5 min and thereafter is cooled at a cooling rate of 10°C/min, has a peak within the range of 180-210°C. Accordingly, a polyester film is provided which has excellent concealing properties and film forming properties, and excellent shrinking properties upon irradiation with light, and which is suitable for use as a light shield base material for an electronic device.