Method for manufacturing thin polarizer, and thin polarizer manufactured using same

1. A method for manufacturing a thin polarizer, the method comprising:

a step of preparing an unstretched polyvinyl alcohol-based film having an elastic modulus of 0.1 MPa to 1.5 MPa and a thickness of 20 μm or less, in which a strength applied to stretch the film by 6 times is 4 N or more; and

a single stretching step of forming a stretched polyvinyl alcohol-based film having a thickness of 10 μm or less by stretching the unstretched polyvinyl alcohol-based film without forming a laminate by attaching a base material film and the like thereto,

wherein the method further comprises a step of dyeing the unstretched polyvinyl alcohol-based film with at least one of iodine and a dichroic dye; and a swelling process before the single stretching step,

wherein the unstretched polyvinyl alcohol-based film has a polymerization degree of 2800 to 3,200, and

wherein the swelling process serves by a method of immersing an unstretched polyvinyl alcohol-based film in pure water at 25° C. to 30° C. for 5 seconds to 30 seconds.

2. The method of claim 1 , wherein a strength applied to stretch the unstretched polyvinyl alcohol-based film by 6 times is a value measured by a method of stretching the film in an aqueous boric acid solution in a range of 1% to 5% in a temperature range of 50° C. to 60° C.

3. The method of claim 1 , wherein the single stretching step is performed by a wet stretching method or a dry stretching method.

4. The method of claim 1 , wherein the single stretching step is performed at a stretching magnification of 3 times to 15 times at a temperature of 20° C. to 85° C.

5. The method of claim 1 , wherein the single stretching step is performed in an aqueous boric acid solution having a boric acid concentration of 1 wt % to 5 wt %.

6. A thin polarizer manufactured by the method of claim 1 ,

wherein a thickness is 10 μm or less, a single transmittance is 40% to 45%, and a polarization degree is 99% or more.

7. A thin polarizer manufactured by the method of claim 2 ,

wherein a thickness is 10 μm or less, a single transmittance is 40% to 45%, and a polarization degree is 99% or more.

8. A thin polarizer manufactured by the method of claim 3 ,

wherein a thickness is 10 μm or less, a single transmittance is 40% to 45%, and a polarization degree is 99% or more.

9. A thin polarizer manufactured by the method of claim 4 ,

wherein a thickness is 10 μm or less, a single transmittance is 40% to 45%, and a polarization degree is 99% or more.

10. A thin polarizer manufactured by the method of claim 5 ,

wherein a thickness is 10 μm or less, a single transmittance is 40% to 45%, and a polarization degree is 99% or more.