METHOD OF MAKING AN INTRINSIC POLARIZER

摘要

An integrated wet stretch method of making an intrinsic polarizer includes providing a polymeric film comprising poly(vinyl alcohol), the polymeric film having an original length; immersing the polymeric film in a first bath comprising a first solution having a pH of less than about 3.0; uniaxially stretching the first polymeric film in a machine direction thereby forming a stretched polymeric film; removing the stretched polymeric film from the first bath; removing excess first solution from the stretched polymeric film; and uniaxially stretching the stretched polymeric film in the machine direction, at a temperature of at least about 120° C, thereby forming a further stretched polymeric film.