Patents Assigned to Lenzing Aktiengesellschaft
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Publication number: 20170254023Abstract: A water dispersible wipe includes a web including at least 10 weight % (wt. %) of a fibrillated regenerated cellulose microfiber (CMF) based on the total weight of the web, the remaining fibers of the web including natural cellulosic fibers; a wet strength agent disposed within the web; and a pH-modifying composition having a wetting pH disposed within the web; wherein the water dispersible wipe includes at least two webs and disperses upon exposure to an aqueous environment having a pH greater than the wetting pH and has a cross-direction (CD) wet tensile of at least 75 g/in after 24 hours as measured according to IVDA Standard Test WSP 110.4 (05).Type: ApplicationFiled: March 3, 2017Publication date: September 7, 2017Applicants: Georgia-Pacific Consumer Products LP, Lenzing AktiengesellschaftInventors: Daniel W. Sumnicht, Stephanie P. Boyce
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Patent number: 9701800Abstract: The present invention relates to a method for the production of films made of polysaccharides which, as a fiber-forming substance, contain ?(1?3)-glucan, as well as to the films made thereof and to their use.Type: GrantFiled: April 10, 2014Date of Patent: July 11, 2017Assignee: LENZING AKTIENGESELLSCHAFTInventors: Franz Dümberger, Andreas Schweigart, Gerold Riedl, Elisabeth Reiter, Gert Kroner
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Publication number: 20170121855Abstract: The present invention relates to Lyocell staple fiber consisting of a plurality of cut filaments, which is characterized in that at least part of said cut filaments exhibit an overall cross-sectional shape which is a bi- or multi-filar cross-sectional shape resulting from notionally partially overlapping two or more fiber cross-sectional shapes.Type: ApplicationFiled: September 30, 2015Publication date: May 4, 2017Applicant: LENZING AKTIENGESELLSCHAFTInventors: Christoph Schrempf, Franz Durnberger, Wolfgang Uhlir
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Patent number: 9334592Abstract: The present invention relates to a process for the production of a hydroentangled product comprising cellulose fibers, wherein a Lyocell melt-blown web is subjected to a treatment by fine high-pressure jets of water, characterized in that the web is subjected to said fine high-pressure jets in at least three treatment steps the pressure of said high-pressure jets is 75 bar or less in each of said treatment steps. Furthermore, the invention relates to products obtainable by said products, and uses thereof.Type: GrantFiled: October 10, 2008Date of Patent: May 10, 2016Assignee: Lenzing AktiengesellschaftInventors: Pat White, Haio Harms, Malcolm Hayhurst
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Publication number: 20150380703Abstract: The present invention relates to a battery separator, comprising fibers of the lyocell genus, wherein said lyocell fibers are mercerised. The present invention furthermore relates to novel lyocell fibers useful for battery separators, as well as batteries comprising the inventive battery separator.Type: ApplicationFiled: February 22, 2013Publication date: December 31, 2015Applicant: LENZING AKTIENGESELLSCHAFTInventors: Marco Gallo, Peter Andrew Slater, Chris Potter
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Patent number: 9163095Abstract: The invention relates to a process for producing spherical, non-fibrillar cellulose particles with a particle size in the range of from about 1 ?m to about 400 ?m from a solution of cellulose in which the solution is cooled down to below its solidification temperature wherein it is flowing freely, the solvent is washed out, the solidified cellulose solution is disintegrated to form cellulose powder comprising particles, and the disintegrated and washed out particles are dried. The invention also relates to the cellulose powder and particles made in accordance with the process of the invention.Type: GrantFiled: September 12, 2008Date of Patent: October 20, 2015Assignee: Lenzing AktiengesellschaftInventors: Josef Innerlohinger, Gregor Kraft, Hedda Weber, Haio Harms
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Publication number: 20150093650Abstract: The present invention relates to a battery separator, comprising cellulosic fibers of the lyocell genus, wherein the R10-value, the R18-value and the hemicellulose content of the lyocell fibers is as follows: R10>83%, preferably >84% R18>93%, preferably >94% Hemicellulose content <3%. The present invention furthermore relates to novel lyocell fibers useful for battery separators, as well as batteries comprising the inventive battery separator.Type: ApplicationFiled: February 22, 2013Publication date: April 2, 2015Applicant: LENZING AKTIENGESELLSCHAFTInventors: Marco Gallo, Peter Andrew Slater, Chris Potter
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Patent number: 8827192Abstract: The present invention relates to cellulosic particles, a suspension of cellulosic particles and a process for the production of a suspension of cellulosic particles, whereby the cellulosic material is never dried between the dissolution of the cellulose and the disintegration of the suspended cellulose fibers.Type: GrantFiled: September 12, 2008Date of Patent: September 9, 2014Assignee: Lenzing AktiengesellschaftInventors: Josef Innerlohinger, Heinrich Firgo, Helmut Schkorwaga
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Patent number: 8633120Abstract: The invention concerns a Lyocell fiber, containing a material selected from the group consisting of pearl powder, ground nacre and mixtures thereof. For the manufacture of the fiber according to the invention, a process is used comprising the steps of manufacturing a spinning solution of cellulose in an aqueous tertiary amine oxide, preferably N-methylmorpholine-N-oxide (NMMO) spinning the spinning solution to fibers, and being characterized in that a material selected from the group consisting of pearl powder, ground nacre and mixtures thereof is admixed to the spinning solution and/or to a precursor thereof.Type: GrantFiled: September 15, 2008Date of Patent: January 21, 2014Assignee: Lenzing AktiengesellschaftInventors: Heinrich Firgo, Heidrun Fuchs
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Patent number: 8580167Abstract: The invention relates to a method and a device for producing Lyocell fibers which are extruded from a cellulose solution of water, cellulose and tertiary amine oxide in a spinning head (25). The cellulose solution is obtained in a number of process steps directly from the cellulose (3, 4) or with the formation of a cellulose suspension. Since the degree of polymerization decreases in the course of processing the cellulose through to its extrusion in the cellulose solution, with the processing of celluloses with a low degree of polymerization there is the risk that the endless molded bodies (2) extruded in the spinning head (25) exhibit defective quality.Type: GrantFiled: October 24, 2012Date of Patent: November 12, 2013Assignee: Lenzing AktiengesellschaftInventors: Stefan Zikeli, Michael Longin
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Patent number: 8579119Abstract: A backwash filter, in particular for highly viscous media, comprising a filter body (2) provided in a casing (1) and forming a cylinder jacket, wherein the casing (1) and the filter body (2) are rotatable about the axis of the filter body (2) relative to one another and wherein the filter body (2) separates a medium inflow space (14) from a medium outflow space (16), and comprising a flushing agent discharge channel (10) extending along a generatrix of the filter body (2), which flushing agent discharge channel (10) is movable relative to the filter body (2) and can be brought into flow connection with the filter body (2) across the entire length thereof and across the entire circumference thereof, with the formation of a stream of flushing agent flowing into the flushing agent discharge channel (10), is characterized, for increasing the efficiency of backwashing and of the throughput as well as for protection of the filter material, in that the flow connection always occurs only across a portion of the longiType: GrantFiled: January 17, 2008Date of Patent: November 12, 2013Assignee: Lenzing AktiengesellschaftInventors: Christoph Schrempf, Helmut Fuchs, Ulrich Möderl
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Publication number: 20130295151Abstract: The present invention relates to a process for the treatment of a cellulosic molded body, wherein the molded body is contacted with an acid solution of a chitosan. The process according to the invention is characterized in that the chitosan has a deacetylation degree of at least 80%, a nitrogen content of at least 7 w %, preferably at least 7.5 w %, a weight average molecular weight Mw (D) of 10 kDa to 1000 kDa, preferably 10 kDa to 160 kDa, and a viscosity in 1 w % solution in 1 w % acetic acid at 25° C. of 1000 mPas or less, preferably 400 mPas or less, in particular preferably 200 mPas or less.Type: ApplicationFiled: August 27, 2009Publication date: November 7, 2013Applicant: Lenzing AktiengesellschaftInventors: Sigrid Redlinger, Werner Richardt, Heinrich Firgo
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Patent number: 8524326Abstract: The present invention relates to a process for the treatment of a cellulosic molded body which is characterized in that the molded body is contacted with an alkaline dispersion containing undissolved chitosan particles. The chitosan particles are present in the dispersion preferably in a particle size of from 0.1 to 1500 ?m, preferably from 1 to 800 ?m.Type: GrantFiled: January 19, 2009Date of Patent: September 3, 2013Assignee: Lenzing AktiengesellschaftInventors: Sigrid Redlinger, Werner Richardt
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Patent number: 8500956Abstract: The invention relates to a process for producing a dissolving pulp from a cellulosic starting material using the kraft process, comprising the step of cooking the starting material with a cooking liquor. The process according to the invention characterized in that the starting material is exposed to a steam treatment prior to cooking and that the pulp obtained by cooking is subjected to cold caustic extraction (CCE) in the course of further processing.Type: GrantFiled: May 9, 2007Date of Patent: August 6, 2013Assignee: Lenzing AktiengesellschaftInventors: Herbert Sixta, Andrea Promberger, Andrea Borgards, Roland Möslinger
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Publication number: 20130189474Abstract: The present invention relates to the use of a multilobal cellulosic staple fiber as a filling fiber. Furthermore, the invention relates to a cellulosic staple fiber which is characterized in that the cross-section of the fiber has three or more lobes the titer of the fiber is 1.0 to 30 dtex, preferably more than 3.0 dtex, especially more than 5.0 dtex, preferably 5.6 to 10 dtex, especially preferred more than 6.0 dtex, especially 6.3 to 10 dtex the wet modulus of the fiber fulfils the following formula: Wet modulus (cN/tex)?0.5*?T wherein T is the titer of the fiber in dtex the breaking strength of the fiber in the conditioned state fulfils the following formula: Breaking Strength (cN/tex)?+2*T wherein T is the titer of the fiber in dtex.Type: ApplicationFiled: December 21, 2012Publication date: July 25, 2013Applicant: Lenzing AktiengesellschaftInventor: Lenzing Aktiengesellschaft
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Publication number: 20130149932Abstract: The objective of this invention is to enable the production of colored shaped flame retardant cellulosic articles such as fibers and to use them to produce fabrics and similar items simply and at lower cost than if they were colored by dyeing after production. A product has been invented that is a fiber which is colored using an included pigment during its manufacture.Type: ApplicationFiled: April 20, 2011Publication date: June 13, 2013Applicant: Lenzing AktiengesellschaftInventors: Albert Leitner, Gert Kroner, Tom Burrow, Gabriele Emlinger, Ulf Mathes, Peter Wessely
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Publication number: 20130108676Abstract: The present invention relates to the use of a cellulose fibre containing incorporated a chitosan and/or chitosan salt and/or having a chitosan and/or chitosan salt on its surface, for the preparation of an article that, when being used, is in contact with the skin of a living mammal with a mean pressure p of 0.001 N/cm2?p<0.24 N/cm2, wherein the cellulose fibre is provided at least in a part of those areas of the article that, when being used, are in contact with the skin.Type: ApplicationFiled: March 15, 2011Publication date: May 2, 2013Applicant: LENZING AKTIENGESELLSCHAFTInventors: Sigrid Redlinger, Gert Kroner
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Publication number: 20130049244Abstract: The invention relates to a method and a device for producing Lyocell fibres which are extruded from a cellulose solution of water, cellulose and tertiary amine oxide in a spinning head (25). The cellulose solution is obtained in a number of process steps directly from the cellulose (3, 4) or with the formation of a cellulose suspension. Since the degree of polymerisation decreases in the course of processing the cellulose through to its extrusion in the cellulose solution, with the processing of celluloses with a low degree of polymerisation there is the risk that the endless moulded bodies (2) extruded in the spinning head (25) exhibit defective quality.Type: ApplicationFiled: October 24, 2012Publication date: February 28, 2013Applicant: LENZING AKTIENGESELLSCHAFTInventor: LENZING AKTIENGESELLSCHAFT
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Patent number: 8367203Abstract: The present invention relates to a cellulosic molded body containing a cellulose/clay nanocomposite, wherein the clay component of said nanocomposite comprises a material selected from the group consisting of unmodified hectorite clays and hydrophilically modified hectorite clays.Type: GrantFiled: August 17, 2006Date of Patent: February 5, 2013Assignee: Lenzing AktiengesellschaftInventors: Harmut Rüf, Heinrich Firgo, Gert Kroner
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Patent number: 8317503Abstract: A device for producing Lyocell fibers which are extruded from a cellulose solution of water, cellulose and tertiary amine oxide in a spinning head (25). The cellulose solution is obtained in a number of process steps directly from the cellulose (3, 4) or with the formation of a cellulose suspension. Since the degree of polymerization decreases in the course of processing the cellulose through to its extrusion in the cellulose solution, with the processing of celluloses with a low degree of polymerization there is the risk that the endless molded bodies (2) extruded in the spinning head (25) exhibit defective quality.Type: GrantFiled: May 10, 2010Date of Patent: November 27, 2012Assignee: Lenzing AktiengesellschaftInventors: Stefan Zikeli, Michael Longin