Patents Assigned to Lenzing AG
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Patent number: 11939405Abstract: The present invention relates to a method of pulping cotton-based raw material for producing dissolving pulp. More specifically, the invention relates to a process for producing dissolving pulp under alkaline conditions in combination with a gaseous oxidizing agent. The present invention further relates to dissolving pulp obtainable by pulping cotton-based raw material, in particular dissolving pulp obtainable by the method of the present invention, the use of such dissolving pulp for producing regenerated cellulose molded bodies, and methods of producing lyocell or viscose including such dissolving pulp.Type: GrantFiled: December 22, 2017Date of Patent: March 26, 2024Assignee: Lenzing AGInventors: Stephan Silbermann, Christian Weilach
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Patent number: 10577723Abstract: The invention relates to flame-retardant cellulosic man-made fibers containing a flame-retardant substance in the form of an oxidized condensate of a tetrakis hydroxyalkyl phosphonium salt with ammonia and/or a nitrogenous compound which contains one or several amine groups whereby the fiber has a tenacity of more than 18 cN/tex in a conditioned state. Production process and the use of the fibers according to the invention are further objects of the invention.Type: GrantFiled: October 10, 2013Date of Patent: March 3, 2020Assignee: Lenzing AGInventors: Hartmut Rüf, Clemens Bisjak, Gert Kroner
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Patent number: 9988743Abstract: The invention relates to flame-retardant cellulosic man-made fibers containing a flame-retardant substance in the form of an oxidized condensate of a tetrakis hydroxyalkyl phosphonium salt with ammonia and/or a nitrogenous compound which contains one or several amine groups whereby the fiber has a tenacity of more than 18 cN/tex in a conditioned state. Production process and the use of the fibers according to the invention are further objects of the invention.Type: GrantFiled: December 9, 2011Date of Patent: June 5, 2018Assignee: Lenzing AGInventors: Hartmut Rüf, Clemens Bisjack, Gert Kroner
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Patent number: 9822188Abstract: The present invention relates to a phase-stable suspension of cellulose II in water, having a high water retention capacity and a cellulose concentration between 0.1 and 5.0% by weight, a method of its preparation, and its use.Type: GrantFiled: November 14, 2014Date of Patent: November 21, 2017Assignee: Lenzing AGInventors: Johann Männer, Martina Opietnik, Josef Innerlohinger, Gerhard Reiter, Markus Hager
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Publication number: 20160177471Abstract: The present invention relates to a direct dissolving process for the production of polysaccharide fibers which contain ?(1?3)-glucan as a fiber-forming substance, with aqueous sodium hydroxide solution as a solvent, as well as to the fibers made thereby, and to their use.Type: ApplicationFiled: June 13, 2014Publication date: June 23, 2016Applicant: Lenzing AGInventors: Gregor Kraft, Gert Kroner, Thomas Röder, Heinrich Firgo
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Publication number: 20160138217Abstract: The present invention relates to a regenerated cellulosic fiber which contains an incorporated dye pigment and a fluorescent dye applied by overdying, the use of this fiber for the production of yarns and fabrics and a process for the production of these fibers. This fiber satisfies the demands of EN 471 in relation to luminance factor, the chromaticity coordinates and color fastness and possesses a light fastness (ISO 105-B02, process 2) of more than 5.Type: ApplicationFiled: January 20, 2016Publication date: May 19, 2016Applicant: Lenzing AGInventors: Gabriele Emlinger, Ulf Mathes, Alexander Gstettner, Gert Kroner
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Publication number: 20130149933Abstract: The present invention relates to a cellulosic regenerated fiber which contains an incorporated luminous pigment and an incorporated color pigment and the use of these for the production of yarns, textile fabrics and an article of reflective clothing and a process for the production of these fibers. This fiber satisfies the demands of standard EN 471, standard EN 1150, standard CAN/CSA, standard ANSI/ISEA and standard BS 471 with regard to light density, the color space and fastness values.Type: ApplicationFiled: July 11, 2011Publication date: June 13, 2013Applicant: Lenzing AGInventors: Ksenija Varga, Gert Kroner, Peter Wessely, Johann Männer
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Publication number: 20120178856Abstract: The present invention relates to cellulose fibers with an enhanced metering capability, a process for the production of these and the use of these for the reinforcement of compound materials, in particular thermoplastic polymers.Type: ApplicationFiled: July 27, 2010Publication date: July 12, 2012Applicant: Lenzing AGInventors: Markus Gobl, Josef Innerlohinger, Friedrich Suchomel
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Publication number: 20120177919Abstract: The present invention relates to a flame-retardant cellulosic regenerated fiber for textile applications which for example also satisfies the demands of industrial dry cleaning, its use for the production of yarns and fabrics and a process for the production of these fibers.Type: ApplicationFiled: July 27, 2010Publication date: July 12, 2012Applicant: Lenzing AGInventor: Gert Kroner
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Publication number: 20110045728Abstract: The invention relates to blends of high wet modulus cellulosic fibers and solvent spun cellulosic fibers and yarns and fabrics made thereof.Type: ApplicationFiled: December 22, 2008Publication date: February 24, 2011Applicant: Lenzing AGInventors: Friedrich Weninger, Dieter Eichinger, Whilhelm Feilmair, Johann Leitner, Karin Kämpf
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Publication number: 20110028608Abstract: 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: ApplicationFiled: September 12, 2008Publication date: February 3, 2011Applicant: Lenzing AGInventors: Josef Innerlohinger, Heinrich Firgo, Helmut Schkorwaga
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Publication number: 20110009259Abstract: 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: ApplicationFiled: September 12, 2008Publication date: January 13, 2011Applicant: Lenzing AGInventors: Josef Innerlohinger, Gregor Kraft, Hedda Weber, Haio Harms
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Publication number: 20100330351Abstract: The invention relates to yarns and fabrics containing nylon staple fiber and high-tenacity man-made cellulosic staple fiber, and garments made therefrom, and has particular reference to fabrics having a high resistance to wear whilst retaining a high comfort level.Type: ApplicationFiled: December 10, 2008Publication date: December 30, 2010Applicant: Lenzing AGInventors: Marina Crnoja-Cosic, James Martin Taylor
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Publication number: 20100291823Abstract: The present invention relates to a high-tenacity cellulosic regenerated fiber with an individual fiber titer of between 0.6 and 0.9 dtex and yarns and planar textile structures which contain regenerated fibers of this kind.Type: ApplicationFiled: December 5, 2008Publication date: November 18, 2010Applicant: Lenzing AGInventors: Johann Leitner, Gert Kroner, Egon Dünser, Karin Kämpf, Harald Schobesberger, Ronald Möslinger
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Patent number: 7326376Abstract: A method of regulating the composition of the cellulose-containing extrusion solution in the production of cellulosic molded articles, whereby (a) cellulose is mixed with an aqueous amine oxide solution; (b) the mixture is converted to the extrusion solution by evaporation of water in vacuo at an elevated temperature and by input of shearing energy; (c) the extrusion solution is extruded, forming the cellulosic molded article, and is coagulated in a coagulation bath, and (d) the resulting molded article is washed to remove the residual amine oxide, characterized in that in step (a) the cellulose/amine oxide ratio is kept at a predetermined level by preregulation, and the water content of the extrusion solution is kept at a predetermined level by a main regulation after leaving step (b). This method allows accurate regulation of the composition of the solution.Type: GrantFiled: September 29, 2000Date of Patent: February 5, 2008Assignee: Lenzing AGInventors: Uwe Kind, Leo Kagalowski, Marco Blech
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Patent number: 5284540Abstract: An unstretched first plastic foil is laminated with a longitudinally stretched second plastic foil by the application of heat and pressure. The second foil is preheated, thereupon stretched and thereafter tempered prior to being laminated with the first foil which is heated prior to lamination. The laminating step can coincide with the tempering step and immediately follows the stretching step so that the laminating step can be carried out by utilizing heat which is required for stretching of the second foil. The material of the first foil is or can be identical with the material of the second foil; in any event, the two materials are sufficiently compatible to permit bonding of the unstretched foil to the stretched foil by the application of heat and pressure alone, i.e., without resorting to an adhesive.Type: GrantFiled: January 9, 1991Date of Patent: February 8, 1994Assignees: Spohn Verpackungswerke GmbH & Co., Lenzing AG, Spohn Verpackungswerke GmbH & Co.Inventors: Roland Roth, Henning Schick, Johann Bloo, Franz Zacek
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Patent number: 5120814Abstract: To produce flame-retardant thermostable new homopolyimides having structural units of the general formula ##STR1## by reacting 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride with an overall equimolar amount of 2,4- and/or 2,6-toluene diisocyanate, the reaction is carried out in the presence of a polymerization accelerator. The new homopolyimides have a glass transition point of at least 320.degree. C. and are processible to moulded articles exhibiting a similarly good structural strength as could hitherto be observed in mixed polyimides only. Furthermore, the new homopolyimides can be spun to fibres.Type: GrantFiled: January 31, 1990Date of Patent: June 9, 1992Assignee: Lenzing AGInventors: Sigrid Seidl, Klaus Weinrotter, Herbert Griesser
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Patent number: 5116673Abstract: A high-temperature resistant stacking support is composed of a, preferably self-supporting, core which at least partially is surrounded by a high-temperature resistant fiber composite made of polyimide fibers of the general formula ##STR1## wherein n is an integer larger than 1 and A represents a four-valent aromatic group.The stacking support can be produced by shrinking a polyimide fiber nonwoven consisting of polyimide fibers of the general formula (I) onto the core under heat exposure.These stacking supports are particularly useful for stacking heated aluminum sections.Type: GrantFiled: March 23, 1990Date of Patent: May 26, 1992Assignee: Lenzing AGInventors: Robert Vodiunig, Gerhard Reiter, Klaus Weinrotter
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Patent number: 5094877Abstract: Surfaces are coated by flame spraying onto the surfaces a powder mixture including a high-temperature resistant plastic and a metal, the high-temperature resistant plastic being a polyimide having a glass transition point of above 250.degree. C. and containing low-molecular emittable components in an amount of at least 1.0% by weight, preferably of between 1.0 and 10% by weight.Type: GrantFiled: May 1, 1990Date of Patent: March 10, 1992Assignee: Lenzing AGInventors: Heimo Bieringer, Manfred Schobesberger, Klaus Weinrotter
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Patent number: 4727864Abstract: A protective sleeve, particularly for human arms and legs, uses a sack-like synthetic material film with a slip-in opening. A preferably adhesive, band-shaped sealing strip is fastened at the rim of the slip-in opening over a part of its circumference and projects over the rim of the film. The strip forms a freely projecting member of such length and such surface that the ends of the sealing strip, after enclosing a body part to be covered, overlap, one adhering on the other.Type: GrantFiled: December 2, 1985Date of Patent: March 1, 1988Assignees: IIIe GmbH, Chemie Lenz AGInventors: Peter Wiesenthal, Beatus Ille