POLARIZING PLATE PROTECTIVE FILM AND POLARIZING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a polarizing plate excellent in optical characteristics and a polarizing plate protective film causing no irregular display and contrast degradation even under a high-temperature or high-temperature humid environment when used for the polarizing plate. SOLUTION: This polarizing plate protective film is laminated with a resin layer having a smaller hygroscopicity than tri-acetyl cellulose and a positive photoelasticity constant, and with a resin layer having a smaller hygroscopicity than tri-acetyl cellulose and a negative photoelasticity constant, so that the photoelasticity constant of the polarizing plate protective film is not more than 10.0×10-7 cm2/kgf.