Man-made cellulosic fiber and nonwoven product or fabric comprising the cellulosic fiber

US11313075B2 · kind B2 · utility

Assignees

• KELHEIM FIBRES GMBH · DE
• Glatfelter Gernsbach GmbH · DE

Inventors

• Jörg Kühn · Ötigheim, DE
• Ingo Bernt · Regensburg, DE
• Walter Roggenstein · Glückstadt, DE
• Bernd Seger · Gaggenau, DE

Key dates

• Filing date: Oct 27, 2017
• Grant date: Apr 26, 2022
• Expiry date: Sep 12, 2038

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H11/20
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a modified cellulosic fiber that comprises anionic moieties in an amount of more than 0.25 mol/kg of dry fiber and has applied thereon a polymeric modifying agent in an amount of from 0.5 wt. % to 5.0 wt. %, based on dry fiber, the polymeric modifying agent comprising cationic moieties with a charge of at least 1.5 meq per gram of polymer and the molar ratio of anionic moieties to cationic moieties contained in the fiber is in the range of from 1:1 to 25:1. The fiber according to the present invention is characterized in that the anionic moieties are incorporated in the fiber and are from carboxymethylcellulose, and that the polymeric modifying agent comprising cationic moieties is selected from the group consisting of polydiallyldimethylammonium chloride (poly-DADMAC), poly(acrylamide-co-diallyldimethylammonium chloride) (PAM-DADMAC) and mixtures thereof. The invention furthermore relates to a nonwoven product or fabric comprising the modified cellulosic fiber.