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:
Apr. 23, 2019
Filed:
May. 12, 2016
E I Du Pont DE Nemours and Company, Wilmington, DE (US);
Pankaj Arora, Chesterfield, VA (US);
Jacob L. Jones, North Chesterfield, VA (US);
E I DU PONT DE NEMOURS AND COMPANY, Wilmington, DE (US);
Abstract
A heat-resistant separator contains a porous film, a polymeric fibrous layer adhesively bonded to the surface of the porous film, and an adhesive binder layer located between the porous film and the fibrous layer and covering at least a portion of the surface of the porous film. The fibrous layer contains fibers manufactured of a polyimide wherein the fibers of a form of polyimide comprise fibers with a majority of fibers having diameters in the range of 1-3000 nm. In one of the embodiment the binder layer contains sodium carboxymethylcellulose, and the amount of adhesive present between the porous film and the fibrous web in the final product is within the range of 0.30 grams per square meter of covered surface of porous film to 0.90 grams per square meter of covered surface of porous film.