Abstract:
This disclosure relates to a cross-linking polymer including polyamide-based segments having a specific structure and polyether-based segments having a specific structure, wherein the polyamide-based segments are bound to the polyether-based segments via a residue of an aromatic compound including at least one amine group and at least one carboxylic group, a polymer resin composition including the cross-linking polymer and a polyamide-based resin having relative viscosity of 2.5 to 4.0, and a polymer film including a base film layer including a melt-extrusion of the polymer resin composition.