| abstract |
A first layer comprising a poly(amide-imide) copolymer, and a poly(amide-imide) copolymer, a polyimide, or those laminated on one or both sides of the first layer and having an amide content of 30 mol% or less Including a second layer comprising a combination of, the weight average molecular weight of the poly(amide-imide) copolymer included in the first layer is 30,000 to 200,000 gram/mole, and the polyimide included in the second layer , A poly(amide-imide) copolymer, or a combination thereof, has a weight average molecular weight of 10,000 to 50,000 gram/mole of a laminated film, and a composition for preparing the laminated film. |