METHOD FOR PREPARING FUNCTIONAL EXTRACT-CONTAINING POLYVINYLALCOHOL FILM BY HETEROGENEOUS SAPONIFICATION OF POLYVINYLACETATE FILM

摘要

The present invention relates to a method for preparing a functional extract-containing polyvinylalcohol film, which has an improved specific surface area by having a creased form and, specifically, to a method for preparing a functional extract-containing polyvinylalcohol film having creases formed on a surface thereof, the method comprising a step of, while immersing a functional extract-containing polyvinylacetate film in a first solvent capable of maintaining the film form of the functional extract-containing polyvinylacetate film, saponifying the functional extract-containing polyvinylacetate film to convert the functional extract-containing polyvinylacetate film into a functional extract-containing polyvinyl alcohol film.