Patent ID: 8591688

Claim:
A method for producing a functional film, comprising the steps of: feeding a substrate continuously from a film roll, forming a coating film on the substrate, providing a laminate film on a surface of the coating film in an ambient atmosphere, and winding up the resultant substrate into a film roll; and loading the film roll wound up in the prior step into a vacuum film-forming apparatus, feeding the substrate provided with the laminate film continuously from the film roll, peeling off the laminate film, forming an inorganic film on the coating film on the substrate, and winding up the resultant substrate into a film roll, wherein the laminate film is an adhesive film provided with an adhesive layer through co-casting, the adhesive layer having a peel force of 0.01 N/25 mm or more and 0.06 N/25 mm or less against the coating film.