HYDROPHILIC SINGLE-LAYER FILM HAVING OPTICAL FUNCTIONALITY, AND LAMINATE THEREOF

摘要

The present invention provides a hydrophilic single-layer film which has superior antifogging-antifouling properties and antifogging-antifouling durability as well as superior smoothness, and which has an antireflection function and can also have a surface structure acting as a polarizer. The present invention also provides a method for manufacturing said single-layer film in a simple manner.　This single-layer film has an uneven structure formed from a plurality of projections and a plurality of recesses on the surface thereof. The distance between adjacent projections among the plurality of projections is 1 nm to 800 nm. The single-layer film is formed from a cross-linked resin obtained by curing a polymerizable composition including: a compound having a specific hydrophilic group, and a functional group having a polymerizable carbon-carbon double bond; and a compound having two or more (meth)acryloyl groups. In the prepared single-layer film, the hydrophilic-group concentration slope (Sa2/Da2) for the surface-most concentration (Sa) of at least one hydrophilic group selected from an anionic hydrophilic group, a cationic hydrophilic group and a hydroxyl group in the single-layer film, and the depth concentration (Da) of the hydrophilic group at the halfway point of the single-layer film is 1.1 or more.