Piezoelectric and pyroelectric polymer film and process for prep

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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264 22, B29D 720

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active

043083706

ABSTRACT:
A process for preparing polyvinylidene fluoride type (PVDF) films having highly stable piezoelectricity and pyroelectricity, by stretching PVDF films, while causing corona discharge, across the electric field formed by discharging, to effect thereby to polarization of film.

REFERENCES:
patent: 2935418 (1960-03-01), Berthold et al.
patent: 3691264 (1972-09-01), Asahina
patent: 3931446 (1976-01-01), Murayama
patent: 4095020 (1978-06-01), Prist, Jr. et al.

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