Method for manufacturing one-sided thin polarizing plate
The present invention relates to a method for manufacturing a single-faced thin polarizing plate, including: supplying a process film to one surface of a polarizer having a thickness of 50 μm or less; supplying a protection film to the other surface of the polarizer; forming an adhesive layer by supplying an adhesive composition between the polarizer and the protection film; pressing a laminate of the process film/the polarizer/the protection film by disposing a pair of pressing units on a surface of each of the process film and the protection film; and stripping the process film, in which stripping force between the polarizer and the process film is 1.0 N or less.
1. A method for manufacturing a single-faced thin polarizing plate, comprising:
supplying a process film to one surface of a polarizer having a thickness of 50 μm or less;
supplying a protection film to the other surface of the polarizer;
forming an adhesive layer by supplying an adhesive composition between the polarizer and the protection film;
pressing a laminate of the process film/the polarizer/the protection film by disposing a pair of pressing units on each surface of each of the process film and the protection film;
stripping the process film,
wherein stripping force between the polarizer and the process film is 1.0 N or less, and
wherein surface roughness (Ra) of the process film is 0.5 nm to 60 nm.
2. The method for manufacturing a single-faced thin polarizing plate of claim 1 , further comprising:
forming a protection layer on a surface from which the process film is stripped after the stripping of the process film.
3. The method for manufacturing a single-faced thin polarizing plate of claim 2 , wherein the protection layer is formed by using a radical-curable composition or a cation-curable composition.
4. The method for manufacturing a single-faced thin polarizing plate of claim 2 , wherein a modulus of the protection layer is 500 MPa to 6000 MPa.
5. The method for manufacturing a single-faced thin polarizing plate of claim 2 , wherein a thickness of the protection layer is 0.5 μm to 10 μm.
6. The method for manufacturing a single-faced thin polarizing plate of claim 1 , wherein the pressing is performed under a pressure of 0.5 MPa to 6 MPa.
7. The method for manufacturing a single-faced thin polarizing plate of claim 1 , wherein a thickness of the process film is 20 μm to 100 μm.
8. The method for manufacturing a single-faced thin polarizing plate of claim 1 , wherein a width of the process film is larger than a width of the polarizer.
9. The method for manufacturing a single-faced thin polarizing plate of claim 1 , wherein the process film includes one kind or more selected from the group consisting of a polyethylene terephthalate film, a polyethylene film, a polycarbonate film, a triacetylcellulose film, a cycloolefin polymer film, and an acryl film.
10. The method for manufacturing a single-faced thin polarizing plate of claim 1 , wherein the protection film includes one kind or more selected from the group consisting of a polyethylene terephthalate film, a polyethylene film, a polycarbonate film, a triacetylcellulose film, a cycloolefin polymer film, and an acryl film.
11. The method for manufacturing a single-faced thin polarizing plate of claim 1 , wherein the polarizer is subjected to wet stretching or dry stretching.
12. The method for manufacturing a single-faced thin polarizing plate of claim 11 , wherein the wet stretching or the dry stretching is performed at a stretching magnification of 4 times or more.
13. The method for manufacturing a single-faced thin polarizing plate of claim 1 , wherein a thickness of the single-faced thin polarizing plate is 30 μm to 140 μm.