AROMATIC POLYESTER FILM AND PRODUCTION THEREOF

摘要

An aromatic polyester (I) film is produced by extruding a molten thermoplastic (I) film over a rotary cooling drum, (I) contg. 0.1-45 mmol % of a quat. phosphonium sulphonate (II) based on the difunctional carboxylic acid component and having an a.c. volume resistivity of 6.5 x 10 power 8 ohm or less in the state of a molten film, the molten film is given an electric charge in non-contact manner in the vicinity of the drum to establish close contact of the film with the drum. (II) contains an ester-forming gp. The film is also claimed.