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AssigneeKyungpook National University Industry-Academic Cooperation Foundation
InventorsJeong Hyun Yeum, Seong Beak Yang, Sung Hun Yoo
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The present invention relates to a method for preparing a functional extract-containing polyvinyl alcohol film, which has an improved specific surface area by having a wrinkled form, and specifically, to a method for preparing a functional extract-containing polyvinyl alcohol film having wrinkles formed on a surface thereof, which comprises saponifying a functional extract-containing polyvinyl acetate film, while the functional extract-containing polyvinyl acetate film is immersed in a first solvent capable of maintaining the film form of the functional extract-containing polyvinyl acetate film, so as to convert the functional extract-containing polyvinyl acetate film into a functional extract-containing polyvinyl alcohol film.
A method for preparing a functional extract or chemical compound-containing polyvinyl alcohol film having wrinkles formed on a surface thereof, comprising saponifying a functional extract or chemical compound-containing polyvinyl acetate film, while the functional extract or chemical compound-containing polyvinyl acetate film is immersed in a first solvent capable of maintaining the film form of the functional extract or chemical compound-containing polyvinyl acetate film, so as to convert the functional extract or chemical compound-containing polyvinyl acetate film into a functional extract or chemical compound-containing polyvinyl alcohol film.
Dependencies are inferred from the claim text.