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:
May. 30, 2006
Filed:
Jul. 31, 2002
Waldemar Dohrn, Grefrath, DE;
Reiner Buettner, Rudolstadt, DE;
Ingo Notz, Krefeld, DE;
Georg Werner, Toenisvorst, DE;
Carmen Knobelsdorf, Saalfeld, DE;
Edgar Herrmann, Nettetal, DE;
Michael Schuemann, Straelen, DE;
Waldemar Dohrn, Grefrath, DE;
Reiner Buettner, Rudolstadt, DE;
Ingo Notz, Krefeld, DE;
Georg Werner, Toenisvorst, DE;
Carmen Knobelsdorf, Saalfeld, DE;
Edgar Herrmann, Nettetal, DE;
Michael Schuemann, Straelen, DE;
Stockhausen GmbH & Co. KG, Krefeld, DE;
Abstract
A process for producing cellulosic formed materials having high water retention capacity according to the dry-wet extrusion process by producing a solution of 5 to 20 wt.-% of cellulose in a hydrous tertiary amine oxide, extruding the solution, stretching the extrudate in a non-precipitating medium, and precipitating the formed materials in an aqueous or alcoholic precipitating bath, characterized by extruding a solution including 0.01 to 250 wt.-%, relative to cellulose, of at least one superabsorbent polymer having a grain size of ≦100 μm. The fibers, films, and composite materials being formed are remarkable for their high water retention capacity and are suitable in the production of hygiene products, baby or disposable diapers, sanitary towels, tampons, incontinence articles, absorbent patches, wound dressings, strappings, bandages, absorbent cloths, moisture-absorbing clothing, bed mattings, filter materials or filters, packaging materials, or cable sheathings.