The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2013
Filed:
Nov. 28, 2009
Werner Jenninger, Cologne, DE;
Joachim Wagner, Cologne, DE;
Reimund Gerhard, Berlin, DE;
Ruy Alberto Altafi, Nova Santa Paula, BR;
Werner Wirges, Kleinmachnow, DE;
Werner Jenninger, Cologne, DE;
Joachim Wagner, Cologne, DE;
Reimund Gerhard, Berlin, DE;
Ruy Alberto Altafi, Nova Santa Paula, BR;
Werner Wirges, Kleinmachnow, DE;
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
The present invention relates to a ferroelectret multi-layer composite () comprising at least two polymer films arranged one on top of the other and bonded together, wherein voids are formed between the polymer films, said voids being tubular channels, particularly running parallel to one another. The invention further provides a process for the production of a ferroelectret multi-layer composite with parallel tubular channels, and a device for carrying out the process for the production of the ferroelectret multi-layer composite according to the invention. In addition, the invention relates to a piezoelectric element containing a ferroelectret multi-layer composite according to the invention.