Patents Assigned to Kelheim Fibres GmbH
-
Patent number: 11313075Abstract: 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.Type: GrantFiled: October 27, 2017Date of Patent: April 26, 2022Assignees: KELHEIM FIBRES GMBH, GLATFELTER GERNSBACH GMBHInventors: Jörg Kühn, Ingo Bernt, Walter Roggenstein, Bernd Seger
-
Patent number: 11149367Abstract: The invention relates to a regenerated cellulose fiber in the form of a solid viscose flat fiber having the following properties: The fiber consists of cellulose by more than 98%. The ratio of width B to thickness D of the fiber is 10:1 or higher. The fiber surface is essentially smooth. The fiber is essentially transparent. The fiber according to the invention is particularly suitable for the production of paper.Type: GrantFiled: November 12, 2012Date of Patent: October 19, 2021Assignee: KELHEIM FIBRES GMBHInventors: Haio Harms, Ingo Bernt, Walter Roggenstein
-
Patent number: 11124629Abstract: The present invention relates to a regenerated cellulose fiber which contains a hydrophobic substance selected from the group consisting of alkyl ketene dimers, alkenyl ketene dimers, alkyl succinic anhydrides, alkenyl succinic anhydrides, alkyl glutaric acid anhydrides, alkenyl glutaric acid anhydrides, alkyl isocyanates, alkenyl isocyanates, fatty acid anhydrides as well as mixtures thereof incorporated in the cellulose matrix.Type: GrantFiled: December 4, 2013Date of Patent: September 21, 2021Assignee: KELHEIM FIBRES GMBHInventors: Walter Roggenstein, Frank Hermanutz, Philipp Wimmer
-
Patent number: 10435481Abstract: The present invention relates to a regenerated cellulose fiber having a multi-limbed cross-section. The fiber according to the invention is characterized in that the cross-section is formed of at least two multi-limbed basic shapes (1?, 2?, 3?, 4?), which basic shapes are connected, in each case at least at one of their limb ends, to the limb end of another basic shape and the length of the connecting limb (12) resulting from the connection of the two limb ends is longer than the length of the shortest one of the other limbs by a factor of at least 1.5, preferably of from 1.5 to 2.0.Type: GrantFiled: June 26, 2012Date of Patent: October 8, 2019Assignee: KELHEIM FIBRES GMBHInventors: Ingo Bernt, Konrad Brunner, Matthew North, Reinhold Röthenbacher, Walter Roggenstein, Roland Scholz
-
Publication number: 20190194846Abstract: The invention relates to a method for strengthening a nonwoven fabric by means of a water jet treatment. The method according to the invention is characterized in that the nonwoven fabric contains flat fibers in the form of collapsed hollow viscose fibers with a ratio of width B to thickness D of B:D?10:1.Type: ApplicationFiled: September 9, 2011Publication date: June 27, 2019Applicant: KELHEIM FIBRES GMBHInventors: Ingo Bernt, Walter Roggenstein, Anemone Tautenhahn
-
Patent number: 10047458Abstract: The present invention relates to a regenerated cellulose fiber, which is characterized by the combination of the following features: the fiber has in its dry condition a collapsed hollow cross-sectional structure the fiber has in its wet condition a cross-sectional structure with cavities the fiber is segmented in the longitudinal direction by dividing walls there is incorporated into the fiber an absorbent polymer, in particular carboxymethylcellulose. The fiber may be obtained by a process, wherein there is admixed a carbonate as well as an absorbent polymer, in particular carboxymethylcellulose, to a viscose dope.Type: GrantFiled: August 18, 2015Date of Patent: August 14, 2018Assignee: Kelheim Fibres GmbHInventors: Ingo Bernt, Walter Roggenstein, Calvin Woodings, Haio Harms
-
Patent number: 9279196Abstract: The present invention relates to a regenerated cellulose fiber, which is characterized by the combination of the following features: the fiber has in its dry condition a collapsed hollow cross-sectional structure the fiber has in its wet condition a cross-sectional structure with cavities the fiber is segmented in the longitudinal direction by dividing walls there is incorporated into the fiber an absorbent polymer, in particular carboxymethylcellulose. The fiber may be obtained by a process, wherein there is admixed a carbonate as well as an absorbent polymer, in particular carboxymethylcellulose, to a viscose dope.Type: GrantFiled: July 9, 2010Date of Patent: March 8, 2016Assignee: KELHEIM FIBRES GMBHInventors: Ingo Bernt, Walter Roggenstein, Calvin Woodings, Haio Harms
-
Publication number: 20150354095Abstract: The present invention relates to a regenerated cellulose fiber, which is characterized by the combination of the following features: the fiber has in its dry condition a collapsed hollow cross-sectional structure the fiber has in its wet condition a cross-sectional structure with cavities the fiber is segmented in the longitudinal direction by dividing walls there is incorporated into the fiber an absorbent polymer, in particular carboxymethylcellulose. The fiber may be obtained by a process, wherein there is admixed a carbonate as well as an absorbent polymer, in particular carboxymethylcellulose, to a viscose dope.Type: ApplicationFiled: August 18, 2015Publication date: December 10, 2015Applicant: KELHEIM FIBRES GMBHInventors: Ingo Bernt, Walter Roggenstein, Calvin Woodings, Haio Harms
-
Publication number: 20150329707Abstract: The present invention relates to a regenerated cellulose fiber which contains a hydrophobic substance selected from the group consisting of alkyl ketene dimers, alkenyl ketene dimers, alkyl succinic anhydrides, alkenyl succinic anhydrides, alkyl glutaric acid anhydrides, alkenyl glutaric acid anhydrides, alkyl isocyanates, alkenyl isocyanates, fatty acid anhydrides as well as mixtures thereof incorporated in the cellulose matrix.Type: ApplicationFiled: December 4, 2013Publication date: November 19, 2015Applicant: KELHEIM FIBRES GMBHInventors: Walter Roggenstein, Frank Hermanutz, Philipp Wimmer
-
Publication number: 20140308870Abstract: The invention relates to a regenerated cellulose fiber in the form of a solid viscose flat fiber having the following properties: The fiber consists of cellulose by more than 98%. The ratio of width B to thickness D of the fiber is 10:1 or higher. The fiber surface is essentially smooth. The fiber is essentially transparent. The fiber according to the invention is particularly suitable for the production of paper.Type: ApplicationFiled: November 12, 2012Publication date: October 16, 2014Applicant: KELHEIM FIBRES GMBHInventors: Haio Harms, Ingo Bernt, Walter Roggenstein
-
Publication number: 20140154507Abstract: The present invention relates to a regenerated cellulose fiber having a multi-limbed cross-section. The fiber according to the invention is characterized in that the cross-section is formed of at least two multi-limbed basic shapes (1?, 2?, 3?, 4?), which basic shapes are connected, in each case at least at one of their limb ends, to the limb end of another basic shape and the length of the connecting limb (12) resulting from the connection of the two limb ends is longer than the length of the shortest one of the other limbs by a factor of at least 1.5, preferably of from 1.5 to 2.0.Type: ApplicationFiled: June 26, 2012Publication date: June 5, 2014Applicant: KELHEIM FIBRES GMBHInventors: Ingo Bernt, Konrad Brunner, Matthew North, Reinhold Röthenbacher, Walter Roggenstein, Roland Scholz
-
Publication number: 20140148590Abstract: The present invention relates to a fiber bundle containing a plurality of regenerated multi-limbed cellulose fibers (1?,2?) the cross-sections of which exhibit three or more limbs. The fiber bundle according to the invention is characterized in that at least 10%, preferably at least 20%, particularly preferably at least 50%, of the multi-limbed cellulose fibers are asymmetrical fibers, wherein at least one of the limbs deviates in its length from the other limbs and wherein the length of one or several limbs is greater than the length of the shortest limb(s) by a factor of 2 to 10.Type: ApplicationFiled: June 26, 2012Publication date: May 29, 2014Applicant: KELHEIM FIBRES GMBHInventors: Ingo Bernt, Matthew North, Reinhold Röthenbacher, Walter Roggenstein, Roland Scholz
-
Publication number: 20140147616Abstract: The invention relates to a regenerated cellulose fiber (1?) the cross-section of which comprises an oblong, essentially flat section (3). The fiber according to the invention is characterized in that at least one limb (4, 5, 6, 7) branches off from the oblong section, wherein the length of said limb is at most 40% of the length of the oblong section (3).Type: ApplicationFiled: June 26, 2012Publication date: May 29, 2014Applicant: KELHEIM FIBRES GMBHInventors: Ingo Bernt, Matthew North, Reinhold Röthenbacher, Walter Roggenstein, Roland Scholz
-
Publication number: 20120219784Abstract: The invention relates to the use of a regenerated cellulose fiber, in which carboxymethylcellulose is incorporated, in a flame-retardant product.Type: ApplicationFiled: July 9, 2010Publication date: August 30, 2012Applicant: Kelheim Fibres GmbHInventor: Ingo Bernt
-
Publication number: 20120209234Abstract: The present invention relates to a regenerated cellulose fiber, which is characterized by the combination of the following features: the fiber has in its dry condition a collapsed hollow cross-sectional structure the fiber has in its wet condition a cross-sectional structure with cavities the fiber is segmented in the longitudinal direction by dividing walls there is incorporated into the fiber an absorbent polymer, in particular carboxymethylcellulose. The fiber may be obtained by a process, wherein there is admixed a carbonate as well as an absorbent polymer, in particular carboxymethylcellulose, to a viscose dope.Type: ApplicationFiled: July 9, 2010Publication date: August 16, 2012Applicant: Kelheim Fibres GmbHInventors: Ingo Bernt, Walter Roggenstein, Calvin Woodings, Haio Harms
-
Patent number: 7694827Abstract: A filter comprising a polymer material comprising a polymer matrix such as polyacrylonitrile containing dispersed metal oxide particles. The metal oxide particles are for example ferric oxide particles, and the polymer material contains generally 0.25-3% by weight of these particles. The filters are resistant to thermo-oxidation and have reduced shrinkage or degradation.Type: GrantFiled: June 11, 2003Date of Patent: April 13, 2010Assignees: Commonwealth Scientific & Industrial Research Organisation, Kelheim Fibres GmbHInventors: Bernd Huber, Robert Helstroom
-
Publication number: 20080196188Abstract: The present invention relates to a fibrous composite comprising or consisting of natural and/or synthetic fibres, characterised in that at least some of the fibres of the composite exhibit a flat cross-section and the fibrous composite is readily decomposable or dissoluble in water or other liquid.Type: ApplicationFiled: June 14, 2006Publication date: August 21, 2008Applicant: KELHEIM FIBRES GMBHInventors: Konrad Brunner, Friedrich Herbig, Walter Roggenstein, Stefan Sulzmaier