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:
Oct. 04, 2016
Filed:
Dec. 21, 2010
Philippe Azais, Quimper, FR;
Lucien Tamic, Ergue Gaberic, FR;
Audrey Anne-marie Tamic, Arcueil, FR;
Marion Anne-sophie Tamic, Ergue-Gaberic, FR;
Marilyne Gaëlle Tamic, Laignelet, FR;
Hélène Marie-france Tamic, Plougonven, FR;
Andre Huitric, Ergue Gaberic, FR;
Frederic Paulais, Quimper, FR;
Xavier Rohel, Quimper, FR;
Philippe Azais, Quimper, FR;
Lucien Tamic, Ergue Gaberic, FR;
Andre Huitric, Ergue Gaberic, FR;
Frederic Paulais, Quimper, FR;
Xavier Rohel, Quimper, FR;
BOLLORE, Ergue Gaberic, FR;
Abstract
The invention relates to a separator film for a device used for storing electrical energy, the film being porous and oriented, and being obtained by stretching in a longitudinal direction and in a direction transverse to the longitudinal direction, the film containing a mixture comprising a polypropylene homopolymer, at least 10% of a copolymer obtained from monomers comprising at least propylene and ethylene, and at least one beta-nucleating agent. According to the invention, the ethylene content of the copolymer is ≧1% but <10% and a propylene content of the copolymer is ≧90% for a film thickness of ≧8 microns and ≦30 microns, corresponding to a specified space factor according to the IEC-60674-3-1 standard greater than or equal to 145% and a density of the biaxially stretched film greater than or equal to 0.18 g/cmbut less than or equal to 0.41 g/cm.