| 摘要 |
<p>The present invention relates to an apparatus for manufacturing a PVA film (polarizing film) exhibiting a polarization characteristic by dyeing a base film with iodine, potassium iodide and boric acid through a continuous process, and provides an apparatus comprising: an dyeing exhaustion bath in which the base film is dipped and dyed in an aqueous solution containing iodine, potassium iodide and boric acid, wherein the iodine is maintained at a low concentration in a preset range; and at least one pump provided to one side of the dyeing exhaustion bath and injecting the iodine by using a continuous or intermittent dropping method, wherein the iodine input amount is controlled to maintain an iodine concentration measured at an arbitrary point as a low concentration in a preset range on the basis of a difference between the iodine concentration measured at the arbitrary point of the dyeing exhaustion bath spaced from the pump and an iodine concentration at a point at which the iodine is injected from the pump.</p> |
