Process for making a layered material comprising a micro- and/or nanostructured layer and adhesive sheet for use in said process

A process for making a layered material comprising a micro- and/or nanostructured layer in a resin comprising the steps of:

• providing a substrate configured to constitute a first layer of the layered material;
• providing an adhesive sheet comprising at least one layer of nanofibre nonwoven fabric of a solidified thermosetting acrylic resin and/or of a solidified thermoplastic resin;
• at least partially coating the substrate with the adhesive sheet;
• and
• heating the assembly comprising the substrate coated by the adhesive sheet for a time interval sufficient to bring the layer of nanofibre nonwoven fabric to a heating temperature sufficient to cause a phase transition of the layer of nanofibre nonwoven fabric such as to generate a micro- and/or nanostructure of localized accumulations of thermosetting acrylic resin and/or thermoplastic resin;
• wherein the step of providing the adhesive sheet comprises supplementing the layer of nanofibre nonwoven fabric of thermosetting acrylic resin and/or thermoplastic resin of the adhesive sheet with at least a plurality of nano-elements in a material different from the thermosetting acrylic resin and/or thermoplastic resin of the adhesive sheet.