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:
Sep. 08, 2026
Filed:
Jul. 28, 2021
Lenzing Aktiengesellschaft, Lenzing, AT;
LENZING AKTIENGESELLSCHAFT, Lenzing, AT;
Abstract
The invention relates to the use of a lyocell fiber () for the manufacture of a nonwoven fiber fleece (). To manufacture a thin nonwoven fiber fleece with sufficient mechanical properties, the use of a lyocell fiber is proposed, where the fiber () has a cross-sectional aspect ratio of at least 1.8. The invention further relates to a nonwoven fiber fleece (). In order to manufacture a thin nonwoven fiber fleece () suitable for use as a battery separator, it is proposed, that the fiber fleece comprises at least two layers () of fibrillated lyocell fibers (), with the fibrillated lyocell fibers () having solid cores () and fibrils () protruding from said cores (), the fibers and fibrils () being intermingled to form the fiber fleece (), embedding the solid cores () therein, whereby the solid cores () of the fibrillated lyocell fibers () have an average cross-sectional aspect ratio k of at least 1.5.