Polyimide film and production process thereof

Details Polyimide film and production process thereof Polyimide film and production process thereof

C - Chemistry, Metallurgy

08

J

C08J 5/18 (2006.01) B29C 41/24 (2006.01) B29C 55/12 (2006.01) B29D 7/01 (2006.01) C08G 73/10 (2006.01) C08L 79/08 (2006.01)

Patent

CA 2406723

An oriented polyimide film of high strength and a production process therefor. The process basically comprises stretching a gelled film and then imidating the film. The gelled film is formed by introducing a polyamic acid solution into a condensation agent solution. The gelled film is swollen with a solvent at the time of stretching.

L'invention concerne un film polyimide orienté très résistant ainsi qu'un procédé permettant de produire ce film. Ce procédé consiste principalement à étirer un film à l'état de gel puis à imider le polymère. On prépare le film à l'état de gel en incorporant une solution d'acide polyamique dans une solution contenant un agent de condensation. Avant l'étirage, on fait gonfler le film à l'état de gel à l'aide d'un solvant.

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