Material to form a hydrogel
AssigneeYoshiyuki KOYAMA
InventorsYoshiyuki KOYAMA, Tomoko ITO
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Abstract
A soft film, a sponge, or a sheet in the dried state is provided, which is capable of forming a hydrogel absorbing water or blood. The film is obtainable by preparing a film-state material in the dried state from either a solution of poly(acrylic acid) or a solution of polyvinylpyrrolidone, and bringing the film-state material into contact with the other remaining solution, and then drying or freeze-drying it.
Claims15
A method for producing a dried film including poly(acrylic acid) and polyvinylpyrrolidone, the method comprising:
- preparing a film-state material in a dried state from either a solution of poly(acrylic acid) or a solution of polyvinylpyrrolidone;
- and
- bringing the film-state material into contact with the other remaining solution, followed by being dried.
A method for producing a freeze-dried sheet including poly(acrylic acid) and polyvinylpyrrolidone, the method comprising:
- preparing a film-state material in a dried state from either a solution of poly(acrylic acid) or a solution of polyvinylpyrrolidone;
- and
- bringing the film-state material into contact with the other remaining solution, followed by being frozen and then being freeze-dried.
Dependencies are inferred from the claim text.