Dielectric film and process for producing same

Details Dielectric film and process for producing same Dielectric film and process for producing same

B - Operations, Transporting

29

C

18/521

B29C 49/08 (2006.01) C08J 5/18 (2006.01) H01B 3/44 (2006.01)

Patent

CA 1220912

ABSTRACT OF THE DISCLOSURE The dielectric film having improved electrical and optical properties comprises a vinylidene fluoride polymer formed essentially from vinylidene fluoride, said film having a predominant .alpha.-crystal structure, the molocular axes in the crysta region of the film being oriented mainly parallel to the plane of the film, the degree of orientation .pi. being from 0.8 to 1.0, and the film, when heated from room temperature up to about the melting point, manifesting no heat shrinkage. The dielectric film is produced by an inflation method in which the vinylidene fluoride polymer is flow-oriented in a molten state, cooled to solidify and then taken up.

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