| abstract |
An embodiment of the present invention relates to a polyamide-imide film which is colorless and transparent, but has excellent mechanical properties and in particular, has improved tensile elongation. Specifically, by controlling the content of the imide repeating unit and the amide repeating unit constituting the polyamide-imide film, it is possible to improve the optical properties and the mechanical properties in a balanced manner, and more particularly to provide an aliphatic dicarbonyl compound To a polyamide-imide film which is imparted with flexibility by forming amide repeating units by a specific amount. |