It is an object to provide a composite in which the adhesion between a sheet layer and a curable resin layer or a film layer is high, and which has high strength and high transparency. The present invention provides a composite wherein a curable resin layer or a film layer is laminated on the one or both surfaces of the sheet layer with a covering layer interposed therebetween, the sheet layer containing fine fibers with an average fiber width of 2 to 1000 nm.

A window film and a flexible display including the same. The window film includes a base layer, a window coating layer on a surface of the base layer, and a back coating layer on another surface of the base layer, wherein the window coating layer is formed from a composition for window coating layers comprising a silicon-based resin, and the window film has an elastic modulus of about 1,000 Mpa or more on the back coating layer and has a pencil hardness of about 6H or higher on an adhesive layer.

A pressure-sensitive adhesive of the invention include a (meth)acryl-based polymer obtained by polymerization of a monomer component including 30 to 99.5% by weight of an alkyl (meth)acrylate having an alkyl group of 10 to 18 carbon atoms at an ester end and 0.5 to 50% by weight of a cyclic nitrogen-containing monomer. The pressure-sensitive adhesive has a satisfactory level of adhesive performance and can form a pressure-sensitive adhesive layer with a lower dielectric constant and reliable moisture resistance.

A display device that includes: a glass substrate comprising a refractive index (n.sub.substrate); a display device structure coupled to the substrate to collectively define a viewing area; and a black mask structure surrounding the display device structure that is coupled to the substrate and comprises a black ink layer and at least one glossy layer between the black ink layer and the glass substrate. The viewing area is characterized by (a) a reflectance from 0.5% to 2.5% as measured at 8 degrees from normal in the visible spectrum, (b) a brightness in the CIE colorimetry system such that 5<L*<17 for the specular component included (SCI), and (c) a brightness in the CIE colorimetry system such that 0<L*<3 for the specular component excluded (SCE). Further, the at least one glossy layer comprises a refractive index (n.sub.glossy) such that |n.sub.glossyn.sub.substrate|>0.1.