Subsequent Chemical Treatment Of Formed Articles Patents (Class 264/195)
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Patent number: 9884932Abstract: In an example, a material includes a cellulosic nanomaterial and multiple polymer chains chemically bonded to the cellulosic nanomaterial. Each polymer chain includes a styrene-butadiene copolymer.Type: GrantFiled: June 14, 2016Date of Patent: February 6, 2018Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Brandon M. Kobilka, Joseph Kuczynski, Jacob T. Porter, Jason T. Wertz
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Patent number: 8070996Abstract: The present invention relates to a process for the production in continuous of cellulose-based flame-retardant fibres or filaments and textile articles obtained therefrom, comprising the predispersion in water of an organophosphoric additive, the dosing and mixing of the aqueous predispersion in a solution of cellulose xanthogenate, the filtration of the mixed solutions and spinning in a regenerating and coagulation bath.Type: GrantFiled: January 28, 2009Date of Patent: December 6, 2011Assignee: LENZING AktiengesellschaftInventors: Francesco Tozzi-Spadoni, Andrea Seghizzi, Giovanni Patritti
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Publication number: 20100190402Abstract: The present invention relates to a process for the production in continuous of cellulose-based flame-retardant fibres or filaments and textile articles obtained therefrom, comprising the predispersion in water of an organophosphoric additive, the dosing and mixing of the aqueous predispersion in a solution of cellulose xanthogenate, the filtration of the mixed solutions and spinning in a regenerating and coagulation bath.Type: ApplicationFiled: January 28, 2009Publication date: July 29, 2010Applicant: LENZING AKTIENGESELLSCHAFTInventors: Francesco TOZZI-SPADONI, Andrea Seghizzi, Giovanni Patritti
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Publication number: 20090258227Abstract: The invention relates to a cellulose carbamate spinning solution, cellulose fibres and a method for the production thereof in which a solution of cellulose carbamate in an ionic liquid is pressed through the holes of a spinning nozzle. The shaped fibres are stretched in air and the cellulose carbamate is regenerated in an aqueous bath. Solvent is removed by washing and the fibre is subsequently dried.Type: ApplicationFiled: April 7, 2009Publication date: October 15, 2009Applicant: FRAUNHOFER-GESELLSCHAFT zur Forderung der angewandten Forschung e.V.Inventors: Horst Ebeling, Hans-Peter Fink
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Patent number: 6720057Abstract: The invention described here concerns a process to permit the manufacture of a cellulose fibre from hydrate cellulose with an extremely large surface area which may be used for the preparation of a fabric characterized by a high absorptive power, good liquid-retention properties, high grease-solvent properties as well as particle-absorbing properties, which is suitable for making products that are themselves easy to clean, which can be used for cleaning and decontamination as well as to reduce the surface tension of water and which can be disposed of without damage to the environment.Type: GrantFiled: May 17, 2000Date of Patent: April 13, 2004Inventors: Achim Neumayr, Herbert Hasl
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Patent number: 6436325Abstract: A method of manufacturing a cellulose based fiber of high water-retentivity. The cellulose based fiber of high water rententivity is manufactured by mixing together a stock solution as a homogeneous mixture of a non-cellulose based material of high absorbency and a cellulose based material and a stock solution singly composed of cellulose based material by means of a nozzle. Then the mixture is formed into a complex fiber as a sheath-core type by spinning, elongation and refining the mixture.Type: GrantFiled: March 17, 2000Date of Patent: August 20, 2002Assignee: Uni-Charm CorporationInventors: Tsutomu Kido, Noriyuki Kimura, Ichiro Takeuchi, Kazuya Umino
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Patent number: 6096258Abstract: A method and apparatus is disclosed for forming a cellulose film suitable for direct food contact by precipitation from a solution of cellulose water and a tertiary amine oxide cellulose solvent. After precipitation of a cellulose gel from the solution, the gel is washed at ever increasing temperatures and then dried to provide a cellulose film having a solvent level to not more than 40 ppm. Portions of the wash water is collected and treated to recover the solvent for reuse.Type: GrantFiled: January 20, 1998Date of Patent: August 1, 2000Assignee: Viskase CorporationInventors: Paul Edmund DuCharme, Jr., Edward Makoto Kajiwara, Norman Abbye Portnoy
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Patent number: 5797081Abstract: An improvement in a method of extruding a plasticized powder mixture having a thermally gellable binder carried in an aqueous vehicle, by passing the mixture through an extruder and then through a die to produce an extrudate, the improvement being the additional step of contacting the extrudate directly after it leaves the die with an agent for simultaneously lowering the gel point of the binder and dehydrating the extrudate. The result is a stiffening of the extrudate in a shorter time than it would be, absent the additional step.Type: GrantFiled: May 7, 1997Date of Patent: August 18, 1998Assignee: Corning IncorporatedInventors: Kevin R. Brundage, Devi Chalasani, Ronald E. Johnson
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Patent number: 5565007Abstract: Modified rayon is produced by adding a modifier to a cellulose solution and spinning fibers from the solution, or by adding a modifier to an alkali cellulose solution or material, xanthating and spinning fibers by the viscose spinning process, wherein the modifier is an amine of the formula (1a), (1b), (1c), (1d) or (1e) ##STR1## The modified rayon produced in this way can be dyed with reactive dyes without addition of electrolyte salt or alkali and have significantly more affinity than conventional viscose fibers.Type: GrantFiled: May 15, 1995Date of Patent: October 15, 1996Assignee: Hoechst AktiengesellschaftInventors: Andreas Schrell, Werner H. Russ, Bernd Huber
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Patent number: 5505890Abstract: A dialysis membrane in the form of a hollow fiber with a continuous internal cavity is made of cellulose acetate or a cellulose acetate derivative. The membrane has a maximum screen coefficient of 0.04 for albumin with a molecular weight of 68,000. A dialysis membrane in the form of a hollow fiber with a continuous internal cavity may be made in a process using a spinning solution containing an organic carboxylic acid and a cavity-forming liquid. Modification agents and/or water are optionally added and the solution is extruded through a spinneret suitable for the manufacture of hollow fibers. The precipitation of the resultant dialysis membrane and the usual further aftertreatment take place in a precipitation bath. The organic carboxylic acid preferably is acetic acid and the precipitation bath preferably is a dilute acetic acid.Type: GrantFiled: October 19, 1994Date of Patent: April 9, 1996Assignee: Akzo N.V.Inventors: Gustav Duweg, Lothar Steinfeld, Wolfgang Ansorge
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Patent number: 5358679Abstract: A process for the production of rayon fibers. The viscose solution is spun into a spinbath which is acidic in character but has no zinc salt like conventional baths. The spin bath contains sulphuric acid, aluminum sulphate and sodium sulphate. The spinning is at temperatures of 35.degree.-60.degree. C. Usual stretching and post spinning operations are carried out as necessary. The regenerated cellulose fibers obtained are of novel cross-sections, namely of `c` cross section not achieved ever before. The fibers exhibit increased luster and softness.Type: GrantFiled: April 29, 1993Date of Patent: October 25, 1994Inventors: Indubhai H. Parekh, Sunanda K. R. Moulik
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Patent number: 4583984Abstract: The present invention concerns improving the properties of cellulose carbamate fibres. The wet strength properties in particular can be improved by treating the fibres with alkalis or organic bases, aiming to reduce the number of carbamate groups. The procedure may also be applied in the manufacturing of regenerated cellulose fibres.Type: GrantFiled: October 28, 1983Date of Patent: April 22, 1986Assignee: Neste OyInventors: Olli Turunen, Jouko Huttunen, Kurt Ekman, Vidar Eklund, Leo Mandell
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Patent number: 4404157Abstract: Process for the continuous production of viscose rayon yarns having a high egree of whiteness, comprising extruding a viscose solution into a coagulating bath, drawing and coagulating the extruded filaments, advancing said filaments in a substantially helical path while they undergo all the treatments required for the production of the finished yarn, which process is characterized by, after the exit of the filaments from the spinning bath, completion of the coagulation to a coagulation index not higher than 1 and a treatment with water having a non-alkaline pH.Type: GrantFiled: June 17, 1981Date of Patent: September 13, 1983Assignee: SNIA VISCOSA Societa' Nazionale Industria Applicazioni Viscosa S.p.A.Inventors: Gianfranco Angelini, Novello Leoncini, Bice Pallesi, Ugo Paoletti
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Patent number: 4221821Abstract: A shaped article, especially a tubing, is disclosed which comprises a plasticized cellulose hydrate composition of high mechanical strength which is obtained by reacting a plasticized cellulose composition obtained by treating cellulose hydrate with a plasticity-enhancing amount of at least one plasticizing alkyl derivative which comprises an alkyl containing from about 8 to about 24 carbon atoms and which is selected from the group consisting of alkylamido-bis-dimethylene-triazinone-tetramethylol, alkylamino-bis-dimethylene-triazinone-tetramethylol, a substantially water insoluble ester of an aliphatic monocarboxylic acid containing from about 9 to about 25 carbon atoms, and a polyalcohol, such as glycerol or polyethylene glycol with a cyclic dimethylolurea derivative, and water and/or a plasticizer.Type: GrantFiled: November 30, 1977Date of Patent: September 9, 1980Assignee: Hoechst AktiengesellschaftInventors: Klaus-Dieter Hammer, Gunter Gerigk, Wolf-Rainer Neeff, Max Bytzek
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Patent number: 4198325Abstract: A shaped article, especially a tubing, is disclosed which comprises a plasticized cellulose hydrate composition of high mechanical strength which is obtained by treating a plasticized cellulose composition obtained by treating cellulose hydrate with a plasticity-enhancing amount of at least one plasticizing alkyl-derivative which comprises an alkyl containing from about 8 to about 24 carbon atoms and which is selected from the group consisting of alkylamido-bis-dimethylene-triazinone-tetra-methylol, alkylamino-bis-dimethylene-triazinone-tetra-methylol and a substantially water insoluble ester of an aliphatic monocarboxylic acid containing from about 9 to about 25 carbon atoms and a polyalcohol, such as glycerol or polyethylene glycol, with a synthetic polymer containing recurring oxyalkylene units and at least one, preferably at least two, terminal N-methylolcarbamate groups, and water and/or plasticizer.Type: GrantFiled: November 30, 1977Date of Patent: April 15, 1980Assignee: Hoechst AktiengesellschaftInventors: Klaus-Dieter Hammer, Gunter Gerigk
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Patent number: 4130689Abstract: High strength hollow rayon fibers or filaments which will recover their hollow configuration after being immersed in water and subsequently dried are provided by an in-line process whereby a viscose solution containing a blowing agent is extruded into an aqueous acid coagulating bath of relatively high acid concentration. The conditions of the process result in hollow filaments that are substantially irreversible since they remain hollow and do not collapse even after repeated washing and drying cycles. The hollow filaments also possess high strength nearly equivalent to that of high wet modulus rayon fibers. Modifiers may be employed in achieving this effect, but are not necessary.Type: GrantFiled: May 20, 1977Date of Patent: December 19, 1978Assignee: International Paper CompanyInventor: Eugene Costa, Jr.
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Patent number: 4002712Abstract: This invention relates to a process for the production of a shaped body from a cellulose derivative which comprises extruding a viscose solution through a shaping die into a precipitation bath and passing the shaped body thus formed through regenerating and washing baths, then treating the body with an acid aqueous solution of a secondary chemical plasticizer, drying it by heating, and finally moistening it with water after drying, said viscose solution being mixed with a liquid containing alkyl-trimethylol-urea of the following general formula ##STR1## wherein n is a whole number between 9 and 24, preferably between 14 and 19, and especially the number 17, and/or with a liquid containing alkyl-ethylene-urea of the following general formula ##STR2## wherein n is a whole number between 11 and 19, preferably between 15 and 18, and especially the number 17, or with a liquid containing alkylamine-bis-dimethylene-triazinonetetramethylol of the following general formula ##STR3## wherein n is a whole number betweenType: GrantFiled: December 16, 1974Date of Patent: January 11, 1977Assignee: Hoechst AktiengesellschaftInventors: Klaus Dieter Hammer, Wolfgang Klendauer
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Patent number: 3937672Abstract: This invention relates to a process for the preparation of a cellulose hydrate moulding which comprises (a) treating a cellulose hydrate moulding while in the gel state, for a period within the range of from 10 seconds to 20 minutes, with an aqueous liquid having dissolved therein at least one plasticizer, a chemical cross-linking agent comprising at least one cyclic urea compound having at least 2 N-methylol groups, and at least one cross-linking catalyst, (b) drying the moulding to a residual water content of from 8 to 12% by weight, and (c) heating the moulding at a temperature within the range of from 100.degree. to 150.degree.C for a period of from 30 seconds to 20 minutes. The invention also relates to a cellulose hydrate moulding prepared by the novel process.Type: GrantFiled: September 20, 1973Date of Patent: February 10, 1976Assignee: Hoechst AktiengesellschaftInventors: Walter Busch, Klaus-Dieter Hammer, Wolfgang Klendauer