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:
Aug. 25, 2026
Filed:
May. 21, 2021
Technikum Laubholz Gmbh, Goppingen, DE;
Centrotherm International Ag, Blaubeuren, DE;
Manuel Clauss, Ostfildern, DE;
Andreas Keller, Öpfingen, DE;
Frank Hermanutz, Leonberg, DE;
Gunter Fauth, Urbach, DE;
Marc Vocht, Stuttgart, DE;
Michael Buchmeiser, Remshalden, DE;
TECHNIKUM LAUBHOLZ GMBH, Goppingen, DE;
CENTROTHERM INTERNATIONAL AG, Blaubeuren, DE;
Abstract
A description is given of continuous fibers based on cellulose and/or cellulose derivatives, more particularly for producing flame-retardant textiles or carbon fibers. The cellulose and/or the cellulose derivatives are in a dehydrated form in the continuous fibers. The oxygen content is 29 to 39 wt %, the limiting oxygen index LOI is 25 to 40 (according to DIN EN ISO 6941; 2004-05) and the density is 1.3 to 1.45 g/cm(according to DIN 65569-1; 1992-10). The continuous fibers may be produced advantageously by impregnating the starting fibers with a solution, more particularly an aqueous solution, of a specific salt which under thermal conditions releases a dehydrating acid which brings about the dehydration of cellulose and/or of cellulose derivatives in a subsequent thermal stage. The continuous fibers of the invention can be used in particular to produce advantageous carbon fibers.