MANUFACTURE OF POLARIZING FILM WITH GOOD POLARIZATION

摘要

PURPOSE:To provide a polyvinyl alcohol system polarizing film with high degree of polarization. CONSTITUTION:When a polyvinyl alcohol system resin film is manufactured and processed with a boronic compound after iodine coloring to manufacture a polarizing film, the film is drawn first uniaxially to less than 4.5 times and successively to less than two times in two stages, during the boronic compound processing.