In the present invention, a resin containing a dichroic dye is dispersed inside a thermoplastic resin through a melt extrusion process, a dichroic dye is oriented through a dry stretching process, and the resin containing the oriented dichroic dye is needle-shaped It provides a polarizing film and a method of manufacturing a polarizing film in which the shape is continuously or discontinuously dispersed in a predetermined direction randomly within a thermoplastic resin.
Since the resin composition containing the polarizing function of the present invention is present in other resins in a dispersed form, it is not necessary to attach a separate protective film to the skin layer of the polarizing film, and it is possible to manufacture a polarizing film by melt extrusion.
Since the polarizing function is uniformly dispersed inside the resin, it is also advantageous in improving unevenness of the polarizing film.
In addition, it is possible to dramatically improve environmental pollution and the like with a melt extrusion method.