| abstract |
The present invention relates to: a polyamide-imide film having transparency and, simultaneously, having characteristics of implementing surface hardness and mechanical properties; and a manufacturing method therefor. According to the present invention, the polyamide-imide film is a copolymer of an aromatic diamine, an aromatic dianhydride and an aromatic dicarbonyl compound, wherein the aromatic diamine and the aromatic dianhydride form an imide unit structure, the aromatic diamine and the aromatic dicarbonyl compound form an amide unit structure, and the amount of the amide unit structure is 50-70 mol% on the basis of 100 mol% of the unit structures of the copolymer. According to the present invention, the polyamide-imide film can have an effect of enabling the implementation of transparency and excellent surface hardness and mechanical properties by having a polyamide-imide form in which a polyamide structure and a polyimide structure are copolymerized. |