Light-transmissive film, manufacturing method therefor, and display device comprising same
One embodiment of the present invention provides a method for manufacturing a light-transmissive film, a light-transmissive film manufactured by the manufacturing method, and a display device comprising the light-transmissive film, the method comprising the steps of: preparing a light-transmissive resin powder; preparing a light-transmissive resin solution by dissolving a first amount of the light-transmissive resin powder in a first solvent; preparing a filler dispersion solution by dispersing a filler in a second solvent; preparing a first mixture solution by mixing the filler dispersion solution and the light-transmissive resin solution; and preparing a second mixture solution by adding a second amount of the light-transmissive resin powder to the first mixture solution and dissolving same.
1 . A light-transmitting film comprising:
a light-transmitting matrix; and
a filler dispersed in the light-transmitting matrix,
wherein the filler comprises silica (SiO 2 ),
wherein at least a part of the silica (SiO 2 ) is surface-treated with at least one of methylalkoxysilane, ethylalkoxysilane, or phenylalkoxysilane,
wherein, in an ultra-small-angle X-ray scattering (U-SAXS) graph logarithmically showing a scattering intensity as a function of a wavenumber, the light-transmitting film has a power law slope, which is the slope of the graph in a wavenumber range of 0.01/Å to 0.1/Å, of −3.6 to −3.2.
2 . The light-transmitting film according to claim 1 ,
wherein the filler has an average particle diameter of 5 to 50 nm.
3 . The light-transmitting film according to claim 1 ,
wherein the filler is present in an amount of 5 to 46% by weight based on a total weight of the light-transmitting film.
4 . The light-transmitting film according to claim 1 ,
wherein an average shortest distance between adjacent filler particles is between 23 and 45 nm.
5 . The light-transmitting film according to claim 1 ,
wherein the light-transmitting film has a yellow index of 3 or less.
6 . The light-transmitting film according to claim 1 ,
wherein the light-transmitting film has a haze of 1% or less.
7 . The light-transmitting film according to claim 1 ,
wherein the light-transmitting film has a light transmittance of 85% or more.
8 . The light-transmitting film according to claim 1 ,
wherein the light-transmitting film has a Young's modulus of 4.5 GPa or more and a 2% yield strength of 95 MPa or more.
9 . The light-transmitting film according to claim 1 ,
wherein the light-transmitting matrix comprises an imide repeating unit.
10 . The light-transmitting film according to claim 1 ,
wherein the light-transmitting matrix comprises an amide repeating unit.