Method of producing a polyimide film and a polyimide film...

Details Method of producing a polyimide film and a polyimide film... Method of producing a polyimide film and a polyimide film...

C - Chemistry, Metallurgy

08

J

18/1035

C08J 5/18 (2006.01)

Patent

CA 1178416

F-0505 A METHOD OF PRODUCING A POLYIMIDE FILM AND A POLYIMIDE FILM PRODUCED BY SUCH A METHOD Abstract: In a method of producing a polyimide film, a concentrated solution 10 of a polyimide resin in a polar aprotic organic solvent is cast onto a film-supporting, cooled surface 20. The resultant film is contacted with an aqueous medium to coagulate the film, whereafter the coagulated film is stripped from the surface 20 and passed through a water bath 30 substantially to replace the solvent in the film with water. The water-containing film is then biaxially oriented and subsequently dried to remove water.

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