Abstract: Provided are a hole machining apparatus for an optical film, comprising: a clamping part for fixing a plurality of optical films in stacked laminated state; and a machining part for performing a hole operation on a predetermined region of the plurality of optical films so as to sequentially pass through the optical films along the laminated direction in a state where the optical films are fixed to the clamping part, wherein upon the hole operation, the machining part comprises a drill part provided to perform a primary hole machining operation and a bite unit provided to perform a secondary hole operation in the primary hole operation region. Also provided is a hole machining method for an optical film, comprising clamping a plurality of laminated optical films at a predetermined pressure in the hole machining apparatus.

Abstract: The present invention relates to a sunscreen agent comprising cellulose nanofibers, and discloses a use of cellulose nanofibers having a UV blocking effect as a sunscreen agent. The cellulose nanofibers according to the present invention is an organic sunscreen agent derived from natural plants, and has a UV scattering mechanism, which is a sunscreen mechanism of an inorganic sunscreen agent, and thus has characteristics that are harmless to the human body or skin. Therefore, it may be applied as a sunscreen cosmetic, and is preferably used as a biomaterial for an additive in a synthetic resin composition such as a pharmaceutical composition for skin, a film and the like.

Abstract: A sputtering target includes: a first crystal comprising In2O3 in a bixbyite structure and SnO2 of a tetragonal structure; and a second crystal comprising In4Sn3O12 in an orthorhombic structure, wherein the second crystal accounts for 8 to 16% of a total size of the first and second crystals.