APPARATUS AND METHOD FOR CONTROLLING COLOR OF POLARIZING FILM

摘要

The present invention relates to an apparatus for controlling the color of a film (polarizing film) which shows polarization characteristics by dyeing and aligning iodine and potassium on a base film using a continuous process, wherein the apparatus comprises a central control portion which predicts the color value of the polarizing film based on the information with respect to the characteristics of the input data measured from a device for measuring the concentration of iodine and potassium of a dyeing tank, a device for measuring the concentration of potassium of a complementary color tank, and thermometers of a device oven and a four-stage oven, and the characteristics of a PVA film injected into the continuous process, thereby controlling the temperature of the device oven and the four-stage oven and the amount of a composition to be injected into the dyeing tank and the complementary color tank.