iodine vibrating screen
WOA1 . The method for producing a polarizer includes: dyeing a polyvinyl alcohol (PVA)based film with molecular iodine by immersing the PVA based film in an aqueous iodine solution (a dyeing step); absorbing the molecular iodine into the PVA based film using an aqueous boric acid solution (a crosslinking step); arranging the molecular iodine in the certain direction by stretching ...