| 摘要 |
PURPOSE:To easily obtain uniform, partially polarizing, and multicolor polarizing films superior in dimensional precision by coating a hydrophilic polymer film with an aq. soln. contg. iodine and a dichroic dye, and heat treating said soln. when it remains in a water-contg. state. CONSTITUTION:A PVA film, etc., uniaxially stretched by about 3-5 times are used for a monoaxially hydrophilic polymer film, and boric acid or borates are added before the stretching. One side or both sides of said stretched film are coated with an aq. soln. contg. iodine or a dichroic dye on the whole surface or patternwise, and before the coating soln. has been dried up, the film is heat treated in a high tension, resulting in obtaining a polarizing film having superior polarizing characteristics, moreover, good in dimensional precision, and patternwise polarizing function. It is desirable that the aq. soln. contg. iodine or the dichroic dye further incorporates a proper amt. of gelling agent for adjusting viscosity of the soln. to control it to 50-300cp, and further its water content is controlled to 30-90%. |
