Polymer piezoelectric film

Details Polymer piezoelectric film Polymer piezoelectric film

1984-08-15

1988-11-15

Ives, P. C.

Stock material or miscellaneous articles

Composite

Of fluorinated addition polymer from unsaturated monomers

428422, 428457, 427100, 526255, 310800, 310313A, 310357, H01L 4108, H01L 4118, C08F21428

Patent

active

047849150

ABSTRACT:
A polymer piezoelectric film comprising a poled film of a vinylidene fluoride copolymer having a high molecular weight as defined by an inherent viscosity within a specific range comprising 40 to 90 mol. % of vinylidene fluoride and 10 to 60 mol. % of trifluoroethylene. Such a high molecular weight vinylidene fluoride copolymer can give a preferable state of molecular arrangement during film formation, particularly preferably formation by casting, to provide a film excellent in piezoelectric characteristic and secondary processing characteristic.

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patent: 4335238 (1982-06-01), Moore et al.
patent: 4400642 (1983-08-01), Kiraly
patent: 4427609 (1984-01-01), Broussoux et al.
patent: 4521322 (1985-06-01), Broussoux et al.
patent: 4543293 (1985-09-01), Nakamura et al.
patent: 4543294 (1985-09-01), Sakagami et al.

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