Process for producing a piezo- and pyro-electric film

Details Process for producing a piezo- and pyro-electric film Process for producing a piezo- and pyro-electric film

1984-07-03

1986-06-03

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

29 2535, B29C 7104, B29C 5512, H04R 1700

Patent

active

045928800

ABSTRACT:
A process for producing a piezo- and pyro-electric film, which comprises biaxially stretching a single- or multi-layered thermoplastic film containing from 3 to 80% by volume, as an average based on the entire film, of a ferroelectric substance, then subjecting the stretched film to polarization treatment by applying a high voltage at a temperature within a range of from 10.degree. C. to a temperature lower than the melting point of said thermoplastic resin, and cooling the film while continuously applying the high voltage.

REFERENCES:
patent: 4227111 (1980-10-01), Cross et al.
patent: 4265841 (1981-05-01), Fujimori et al.
patent: 4268653 (1981-05-01), Uchidol et al.
patent: 4308370 (1981-12-01), Fukada et al.
patent: 4407054 (1983-10-01), Zipfel, Jr.
D. P. Skinner et al., "Flexible Composite Transducers", Mat. Res. Bull., vol. 13, No. 6, pp. 599-607, Jun. 1978.

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