METHOD FOR PREPARING POLARIZER

摘要

PURPOSE: A manufacturing method of a polarizer is provided to prevent degradation after putting under dry heat condition and to improve color durability. CONSTITUTION: A transparent non-oriented polyvinyl alcoholic film is precipitated in water of 30°C for 2 minutes, swelled and is dyed after being precipitated in a 30°C aqueous solution in which 3.5 mmol/L iodine and 2 weight% potassium iodide are included for dyeing for 4 minutes. The polyvinyl alcoholic film is precipitated in a 50°C cross-linking aqueous solution in which 10 weight% potassium iodide, 3.7 weight% boric acid and 0.5 weight% magnesium acetate are included for 2 minutes and is cross-linked. A cellulose triacetate is laminated on both surface of a polarizer and a polarizer plate is manufactured.