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Piezoelectric laminate films and processes for their manufacture

  • US 5,356,500 A
  • Filed: 03/20/1992
  • Issued: 10/18/1994
  • Est. Priority Date: 03/20/1992
  • Status: Expired due to Term
First Claim
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1. A method for providing a piezoelectric laminate film comprising the following steps:

  • a) melting at least two polymeric films formed of different polymers and quenching them;

    b) place one surface of one quenched film upon one surface of another quenched film in intimate contact therewith;

    c) laminate said quenched films whose surfaces are in intimate contact by co-melt pressing;

    d) repeat steps b) and c) until all polymeric films are laminated;

    e) quench said laminate;

    f) cold draw said quenched laminate, andg) pole said drawn laminate to form said piezoelectric laminate film having one or more properties superior to the corresponding property of the individual polymeric films used to make said piezoelectric laminate film.

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