Anti-glare film, polarizing plate and display device
The present invention relates to an anti-glare film including: a light-transmitting substrate; and a hard coating layer containing a binder resin and inorganic fine particles dispersed in the binder resin, wherein the anti-glare film has a specific reflection intensity ratio (R), and a polarizing plate and a display device including the anti-glare film.
1. An anti-glare film comprising: a light-transmitting substrate; and a hard coating layer containing a binder resin and inorganic fine particles dispersed in the binder resin,
wherein a reflection intensity ratio (R) of Equation 1 is 0.6 to 1%, and
a ratio of an external haze to the reflection intensity ratio (R) of the anti-glare film is 10 to 30:
Reflection Intensity Ratio ( R )=( R 1 /R 2 )×100 [Equation 1]
wherein, in the Equation 1,
R 1 is a reflection intensity value measured at 45° corresponding to a specular reflection of the incident angle after irradiating light at an incident angle of 45° with respect to the hard coating layer, and
R 2 is a reflection intensity value measured at 45° corresponding to a specular reflection of the incident angle after irradiating light at an incident angle of 45° with respect to the light-transmitting substrate.
2. The anti-glare film according to claim 1 , wherein
a ratio of the external haze to an internal haze of the anti-glare film is 0.5 to 2.
3. The anti-glare film according to claim 1 , wherein
the inorganic fine particles include:
a first inorganic fine particle aggregate having an average size of 1 to 2 μm;
a second inorganic fine particle aggregate having an average size of 3 to 5 μm; and
third inorganic fine particles having an average primary particle size of 1 to 10 μm.
4. The anti-glare film according to claim 3 , wherein
a ratio of the average particle size of the second inorganic fine particle aggregate to the average size of the first inorganic fine particle aggregate is 1.5 to 4.
5. The anti-glare film according to claim 3 , wherein
the first inorganic fine particle aggregate is an aggregate in which the first inorganic fine particles are aggregated, and
the second inorganic fine particle aggregate is an aggregate in which the second inorganic fine particles are aggregated,
wherein the first inorganic fine particles and the second inorganic fine particles have an average particle size of 50 nm or less.
6. The anti-glare film according to claim 3 , wherein
the third inorganic fine particles have a refractive index of 1.400 to 1.480 based on a wavelength of 500 to 600 nm.
7. The anti-glare film according to claim 3 , wherein
a difference in refractive index between the third inorganic fine particles and the binder resin is 0.2 to 1.0.
8. The anti-glare film according to claim 1 , wherein
the hard coating layer has a thickness of 1 to 10 μm.
9. The anti-glare film according to claim 1 , wherein
the binder resin includes a polymer or copolymer of a vinyl-based monomer or a (meth)acrylate-based monomer.
10. The anti-glare film according to claim 3 , wherein
the hard coating layer includes in an amount of 2 to 10 parts by weight of the third inorganic fine particles relative to 100 parts by weight of the binder resin.
11. The anti-glare film according to claim 3 , wherein
a weight ratio of the first inorganic fine particle aggregate and the second inorganic fine particle aggregate is 1:4 to 7.
12. The anti-glare film according to claim 1 , wherein
the light-transmitting substrate has an in-plane retardation (Re) of 500 nm or less, or 5000 nm or more, as measured at a wavelength of 400 nm to 800 nm.
13. The anti-glare film according to claim 12 , wherein
the light-transmitting substrate is a polyethylene terephthalate film.
14. A polarizing plate comprising the anti-glare film according to claim 1 .
15. A display device comprising the anti-glare film according to claim 1 .
16. The anti-glare film according to claim 9 , wherein the vinyl- based monomer or the (meth)acrylate-based monomer includes a monomer or an oligomer containing one or more (meth)acrylate or vinyl groups and wherein the monomer or the oligomer containing one or more (meth)acrylate is at least one monomer or oligomer selected from the group of pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol hepta(meth)acrylate, trilene diisocyanate, xylene diisocyanate, hexamethylene diisocyanate, trimethylolpropane tri(meth)acrylate, trimethylolpropane polyethoxy tri(meth)acrylate, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, butanediol dimethacrylate, hexaethyl methacrylate, butyl methacrylate, a urethane-modified acrylate oligomer, an epoxide acrylate oligomer, an ether acrylate oligomer, and a dendritic acrylate oligomer.
17. The anti-glare film according claim 1 , wherein the light-transmitting substrate is selected from the group of triacetylcellulose (TAC), polyester (TPEE), polyethylene terephthalate (PET), polyimide (PI), polyamide (PA), aramid, polyethylene (PE), polyacrylate (PAR), polyether sulfone, polysulfone, diacetyl cellulose, polypropylene (PP), polyvinyl chloride, acrylic resins (PMMA), polycarbonate (PC), epoxy resins, urea resins, urethane resins, and melamine resins.