Window cover film and flexible display panel including the same

A window cover film comprising a substrate layer made up of a polyamideimide-based resin and a hard coating layer formed directly on at least one surface of the substrate layer,

• wherein a kinetic friction coefficient is less than 0.15, the kinetic friction coefficient being measured at a speed of 100 mm/min with a force of 5 N under a load of 200 g using parchment paper as an object to be frictionized on the hard coating layer, and a ratio of a static friction coefficient a to the kinetic friction coefficient b satisfies the following Equation 1:
• 1≤a/b≤1.2, [Equation 1]
• wherein the substrate layer is made up of a polyamideimide (PAI)-based resin including a fluorine atom and an aliphatic cyclic structure and the hard coating layer is formed of a composition for forming a hard coating layer including a (meth) acryl-based siloxane resin and a polyfunctional (meth) acrylate-based compound, and
• wherein the polyamideimide (PAI)-based resin is prepared by preparing an amine-terminated polyamide oligomer from a first fluorine-based aromatic diamine and an aromatic diacid dichloride, and polymerizing the amine-terminated polyamide oligomer with a monomer derived from a second fluorine-based aromatic diamine, an aromatic dianhydride, and a cycloaliphatic dianhydride.