POLARIZING FILM AND POLARIZING PLATE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a polarizing film and polarizing plate having excellent optical characteristics and workability. SOLUTION: This polarizing film is produced by biaxially stretching a polyvinylalcoholic film in a dry state and then dyeing. In the biaxial stretching process, the product of the stretching rates in the longitudinal direction and in the lateral direction is controlled to 3 to 8. The stretching process is carried out at 100 to 170 deg.C. The polarizing plate using the polarizing film is produced by laminating a urethane resin layer on at least one surface of the polarizing film.