Patent ID: 8741969

Claim:
A method for producing an anti-adhesion material that comprises a thermally crosslinked gelatin film and a water content of 60 to 85% calculated by the following formula (1): water content (%)=[( Ws - Wd )/ Ws ]×100(%) (1), where Ws represents a weight (wet weight) of the anti-adhesion material immersed in a phosphate buffered saline solution at a temperature of 25° C. for one hour, and Wd represents a weight (dry weight) of the anti-adhesion material dried completely using a vacuum drying apparatus, the thermally crosslinked gelatin film including thermal-crosslinks formed under pressure of one Torr or less at a temperature of 120 to 170° C. for 30 minutes to 72 hours, the method comprising: laminating alternately non-crosslinked gelatin films and fluorine resin sheets so as to form a laminated body having a configuration in which each of the non-crosslinked gelatin films is sandwiched between the fluorine resin sheets, and thermally crosslinking the non-crosslinked gelatin films in the laminated body by heating the laminated body under pressure of one Torr or less at a temperature of 120 to 170° C. for 30 minutes to 72 hours.