Polarizing film

摘要

PCT No. PCT/JP85/00328 Sec. 371 Date May 20, 1986 Sec. 102(e) Date May 20, 1986 PCT Filed Jun. 12, 1985 PCT Pub. No. WO86/02170 PCT Pub. Date Apr. 10, 1986.Disclosed is a polarizing film comprising a hydrophobic polymer containing a dichroic organic colorant in an oriented state which is characterized in that the dichroic organic colorant is substantially insoluble in water, organic solvents and liquid crystals and the dichroic ratio of the colorant is not less than 7 when it is measured with the film obtained by blending the colorant intimately with polyethylene terephthalate, melting the resulting blend and forming it into a film. This polarizing film has exceptionally excellent moisture resistance and thermal resistance.