Optical laminate, polarizing plate, and display device
The present disclosure provides an optical laminate including: a polymer substrate containing a polymer resin and rubber particles having a cross-sectional diameter of 10 to 500 nm dispersed in the polymer resin; and an antiglare layer containing a binder resin and organic fine particles, nano-inorganic particles and chain-shaped silica dispersed in the binder resin, wherein rubber particles having a cross-sectional diameter of 10 to 500 nm exist within 50% of the thickness of the antiglare layer from the interface between the polymer substrate and the antiglare layer, a polarizing plate including the optical laminate, and a liquid crystal display and a display device including the polarizing plate.
1. An optical laminate comprising: a polymer substrate containing a polymer resin and rubber particles having a cross-sectional diameter of 10 to 500 nm dispersed in the polymer resin; and
an antiglare layer containing a binder resin and organic fine particles, nano-inorganic particles and chain-shaped silica dispersed in the binder resin,
wherein the rubber particles having a cross-sectional diameter of 10 to 500 nm exist within 50% of a thickness of the antiglare layer from an interface between the polymer substrate and the antiglare layer.
2. The optical laminate of claim 1 , wherein the rubber particles having a cross-sectional diameter of 10 to 500 nm exist within 30% of the thickness of the antiglare layer from the interface between the polymer substrate and the antiglare layer.
3. The optical laminate of claim 1 , wherein the polymer resin includes at least one resin selected from a (meth)acrylate resin, a cellulose resin, a polyolefin resin, and a polyester resin.
4. The optical laminate of claim 1 , wherein the rubber particles include at least one rubber selected from styrene-butadiene-based rubber and acrylic-based rubber.
5. The optical laminate of claim 1 , wherein the polymer substrate has a thickness of 10 to 150 μm, and the antiglare layer has theft thickness of 1 to 10 μm.
6. The optical laminate of claim 1 , wherein a ratio of the thickness of the antiglare layer to the thickness of the polymer substrate is 0.008 to 0.8.
7. The optical laminate of claim 1 , wherein the polymer substrate includes 5 to 50 parts by weight of the rubber particles having a cross-sectional diameter of 10 to 500 nm relative to 100 parts by weight of the polymer resin.
8. The optical laminate of claim 1 , wherein the binder resin contained in the antiglare layer includes a (co)polymer formed from a vinyl-based monomer or oligomer or a (meth)acrylate monomer or oligomer.
9. The optical laminate of claim 1 , wherein the chain-shaped silica has a shape in which 5 to 20 silica particles having a diameter of 2 nm to 20 nm are arranged in a serial connection.
10. The optical laminate of claim 1 , wherein the antiglare layer includes 1 to 50 parts by weight of the chain-shaped silica, relative to 100 parts by weight of the nano-inorganic particles.
11. The optical laminate of claim 1 , wherein a moisture permeation amount of the polymer substrate measured for 24 hours at 40° C. and 100% humidity is 150 g/m 2 or less.
12. A polarizing plate comprising the optical laminate of claim 1 .
13. The polarizing plate of claim 12 , comprising the optical laminate as a polarizer protective film.
14. A display device comprising the polarizing plate of claim 12 .
15. The optical laminate of claim 1 , wherein
the rubber particles having a cross-sectional diameter of 10 to 500 nm existing within 50% of the thickness of the antiglare layer from the interface between the polymer substrate and the antiglare layer and
the rubber particles having a cross-sectional diameter of 10 to 500 nm contained in the polymer substrate have same components.
16. The optical laminate of claim 15 , wherein the rubber particles include at least one rubber selected from styrene-butadiene-based rubber and acrylic-based rubber.