| abstract |
PURPOSE: To provide the titled film consisting of a novel linear aromatic polyester containing (ethylenedioxy)dinaphthoic acid as an acid component, and having excellent heat resistance, hydrolysis resistance and chemical stability and high strength and Yound's modulus. n CONSTITUTION: The objective film can be manufactured by using (A) and acid component composed mainly of 6,6'-(ethylenedioxy)di-2-naphthoic acid and (B) a glycol component composed mainly of a 2W10C glycol having even number of carbon atoms constituting the main chain (preferably ethylene glycol), and having an intrinsic viscosity of ≥0.4. The film is manufactured preferably by drying said polyester, melting and extruding at a temperature above its melting point and ≤330°C, and quenching by contacting with a rotary drum of a temperature lower than the glass transition temperature of the polyester. n COPYRIGHT: (C)1985,JPO&Japio |