Patents by Inventor Tom Lindstrom
Tom Lindstrom has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11724284Abstract: The method of the invention relates to a method of manufacturing a fibrous, oxygen barrier film by casting a suspension comprising microfibrillated cellulose onto a non-porous substrate in a number of subsequent steps with intermediate drying. The invention enables an efficient method to manufacture an MFC film by casting technology without the problems of cracks or voids formed in the film. By applying the MFC in several layers, with in-between drying, the distance the water has to diffuse through is shorter, whereby the evaporation is more efficient and the film properties are not negatively affected by the drying.Type: GrantFiled: January 30, 2018Date of Patent: August 15, 2023Assignee: Stora Enso OYJInventors: Lars Axrup, Isabel Knöös, Christian Aulin, Magnus Hillergren, Tom Lindström, Göran Ström
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Publication number: 20200023409Abstract: The method of the invention relates to a method of manufacturing a fibrous, oxygen barrier film by casting a suspension comprising microfibrillated cellulose onto a non-porous substrate in a number of subsequent steps with intermediate drying. The invention enables an efficient method to manufacture an MFC film by casting technology without the problems of cracks or voids formed in the film. By applying the MFC in several layers, with in-between drying, the distance the water has to diffuse through is shorter, whereby the evaporation is more efficient and the film properties are not negatively affected by the drying.Type: ApplicationFiled: January 30, 2017Publication date: January 23, 2020Applicant: Stora Enso OYJInventors: Lars Axrup, Isabel Knöös, Christian Aulin, Magnus Hillergren, Tom Lindström, Göran Ström
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Patent number: 10138599Abstract: The present invention relates to process for the production of a coated substrate comprising cellulosic fibers, the process comprising the steps of: i) providing a first substrate comprising cellulosic fibers and having a dry content of less than 50%; ii) applying a coating composition to the first substrate in an amount of more than 5 g/m2, calculated as dry weight of the coating composition, wherein the coating composition comprises: microfibrillated cellulose (MFC), and optionally a water retention agent selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM), sodium polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC prepared from oxidized fibers, MFC prepared by CMC-functionalized fibers, and/or combinations thereof; and iii) mechanically dewatering the first substrate. The present process provides an energy efficient coating process which can be performed online.Type: GrantFiled: December 14, 2015Date of Patent: November 27, 2018Assignee: STORA ENSO OYJInventors: Christian Aulin, Lars Axrup, Göran Flodberg, Magnus Hillergren, Tom Lindström, Carl-Henrik Ljungqvist, Göran Ström
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Publication number: 20180155875Abstract: Process for the production of a cured pulp product suitable for use in the production of paper, paperboard, tissue paper, filter paper or fluff pulp, comprising the steps of attaching an anionic or amphoteric carboxymethyl cellulose (CMC) to cellulosic fibres in acidic conditions or in the presence of divalent metal ions. Aluminium ions or divalent ions are then added to the slurry to a total molar concentration of from 0.0001 M to 0.5 M in the first pulp slurry. The first pulp slurry is then dewatered and cured in acidic conditions and a cured pulp product is provided. The cured pulp product is subsequently used in a paper making process to provide a paper-based product, whereby higher bulk is provided for the final paper-based product. Alternatively, the curing step is omitted and instead aluminium ions are added to the first pulp slurry and the pulp is directly used in a paper making process.Type: ApplicationFiled: May 19, 2016Publication date: June 7, 2018Inventors: Mikael Ankerfors, Tom Lindström, Gunborg Glad-Nordmark
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Publication number: 20180141319Abstract: The present invention relates to a process for the production of a bulky multi-layer paperboard comprising a middle layer produced from a cured pulp product produced by a method comprising the steps of: i) providing a first aqueous pulp slurry comprising cellulosic fibres and having a pulp consistency of from 0.1% to 40% by weight, calculated as dry weight of the cellulosic fibres in the first pulp slurry; ii) adding to the first pulp slurry an aluminium metal salt comprising Al3+-ions to a total molar concentration of aluminium ions of from 0.0001 M to 0.5 M in the first pulp slurry; iii) adjusting the pH of the first pulp slurry to a pH of from pH 3.0 to pH 6.0; iv) dewatering and curing the first pulp slurry at a temperature of at least 60° C. and thus provide a cured pulp product.Type: ApplicationFiled: May 19, 2016Publication date: May 24, 2018Inventors: Mikael Ankerfors, Tom Lindström, Gunborg Glad-Nordmark
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Publication number: 20170342661Abstract: The present invention relates to process for the production of a coated substrate comprising cellulosic fibres, the process comprising the steps of: i) providing a first substrate comprising cellulosic fibres and having a dry content of less than 50%; ii) applying a coating composition to the first substrate in an amount of more than 5 g/m2, calculated as dry weight of the coating composition, wherein the coating composition comprises: microfibrillated cellulose (MFC), and optionally a water retention agent selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM), sodium polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC prepared from oxidized fibers, MFC prepared by CMC-functionalised fibers, and/or combinations thereof; and iii) mechanically dewatering the first substrate. The present process provides an energy efficient coating process which can be performed online.Type: ApplicationFiled: December 14, 2015Publication date: November 30, 2017Inventors: Christian Aulin, Lars Axrup, Göran Flodberg, Magnus Hillergren, Tom Lindström, Carl-Henrik Ljungqvist, Göran Ström
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Patent number: 8992732Abstract: The invention relates to a process for making paper or paper board comprising forming a cellulosic suspension, flocculating the suspension, draining the suspension on a device to form a sheet and then drying the sheet, wherein the suspension is flocculated using a formation improving 3-component flocculation system comprising a) a linear cationic or ampoteric co-polymer of: i) acrylamide, and ii) a substance with formula (I) with a halide as counter-ion; b) at least one water soluble component chosen from the group of anionic polyacrylamide, non-ionic polyacrylamide and polyethyleneoxide; and c) inorganic microparticles, whereby the flocculation system does not contain a wafer-dispersible or branched anionic organic polymer. The invention also relates to use of the flocculation/retention system in the manufacture of paper or paper board, and to paper and paper board thus produced.Type: GrantFiled: December 17, 2012Date of Patent: March 31, 2015Assignee: Innventia ABInventors: Tom Lindström, Anna Svedberg, Mikael Ankerfors
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Patent number: 8911591Abstract: A method for the manufacturing of nanocellulose. The method includes a first modification of the cellulose material, where the cellulose fibers are treated with an aqueous electrolyte-containing solution of an amphoteric cellulose derivative. The modification is followed by a mechanical treatment. By using this method for manufacturing nanocellulose, clogging of the mechanical apparatus is avoided. Also the nanocellulose is manufactured in accordance with the method and uses of the cellulose.Type: GrantFiled: April 8, 2009Date of Patent: December 16, 2014Assignee: Innventia ABInventors: Mikael Ankerfors, Tom Lindstrom
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Publication number: 20140345817Abstract: The invention relates to a process for making paper or paper board comprising forming a cellulosic suspension, flocculating the suspension, draining the suspension on a device to form a sheet and then drying the sheet, characterised in that the suspension is flocculated using a formation improving 3-component flocculation system comprising a) a linear cationic or ampoteric co-polymer of i) acrylamide, and ii) a substance with formula (I) with a halide as counter-ion; b) at least one water soluble component chosen from the group of anionic polyacrylamide non ionic polyacrylamide and polyethyleneoxide; and c) inorganic microparticles, whereby the flocculation system does not contain a wafer-dispersible or branched anionic organic polymer. The invention also relates to use of the flocculation/retention system in the manufacture of paper or paper board, and to paper and paper board thus produced.Type: ApplicationFiled: December 17, 2012Publication date: November 27, 2014Inventors: Tom Lindström, Anna Svedberg, Mikael Ankerfors
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Patent number: 8546558Abstract: A method of treating chemical pulp for the manufacture of microfibrillated cellulose includes the following steps: a) providing a hemicellulose containing pulp, b) refining the pulp in at least one step and treating the pulp with one or more wood degrading enzymes at a relatively low enzyme dosage, and c) homogenizing the pulp thus providing the microfibrillated cellulose. A microfibrillated cellulose obtainable by the method is also provided. The microfibrillated cellulose can be used in food products, paper products, composite materials, coatings or in rheology modifiers (e.g. drilling muds).Type: GrantFiled: January 31, 2007Date of Patent: October 1, 2013Assignee: STFI-Packforsk ABInventors: Mikael Ankerfors, Tom Lindström, Gunnar Henriksson
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Patent number: 8241756Abstract: The invention relates to compositions for coating of printing paper, said compositions comprising microfibrillated cellulose (MFC) and one or more polysaccharide hydrocolloids, and use of said compositions. Further, the invention relates to coated paper, comprising a first layer of polysaccharide hydrocolloid(s) and a second layer of MFC, and use of said paper. A method for reducing the linting and/or dusting of a paper is also disclosed.Type: GrantFiled: April 3, 2009Date of Patent: August 14, 2012Assignee: Innventia ABInventors: Mikael Ankerfors, Tom Lindstrom, Hainong Song, Miroslav Hoc
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Publication number: 20110081554Abstract: The invention relates to compositions for coating of printing paper, said compositions comprising microfibrillated cellulose (MFC) and one or more polysaccharide hydrocolloids, and use of said compositions. Further, the invention relates to coated paper, comprising a first layer of polysaccharide hydrocolloid(s) and a second layer of MFC, and use of said paper. A method for reducing the linting and/or dusting of a paper is also disclosed.Type: ApplicationFiled: April 3, 2009Publication date: April 7, 2011Applicant: INNVENTIA ABInventors: Mikael Ankerfors, Tom Lindstrom, Hainong Song, Miroslav Hoc
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Publication number: 20110036522Abstract: A method for the manufacturing of nanocellulose. The method includes a first modification of the cellulose material, where the cellulose fibres are treated with an aqueous electrolyte-containing solution of an amphoteric cellulose derivative. The modification is followed by a mechanical treatment. By using this method for manufacturing nanocellulose, clogging of the mechanical apparatus is avoided. Also the nanocellulose is manufactured in accordance with the method and uses of the cellulose.Type: ApplicationFiled: April 8, 2009Publication date: February 17, 2011Applicant: INNVENTIA ABInventors: Mikael Ankerfors, Tom Lindstrom
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Publication number: 20100193116Abstract: A method for manufacturing a composite material having reduced mechanosorptive creep includes the following steps: a) mixing fibers of a lignocellulosic material with a thermoplastic material where the thermoplastic material is in fiber form; b) adding the mixture made in step a) onto a wet web, thus forming a composite material; and c) hot pressing of the composite material. The composite material having reduced mechanosorptive creep being the manufacturing result of the method, and the use of the method and the composite material are described.Type: ApplicationFiled: July 4, 2008Publication date: August 5, 2010Applicant: INNVENTIA ABInventors: Kristofer Gamstedt, Hannes Vomhoff, Tommy Iversen, Fredrik Berthold, Tom Lindstrom, Anders Stenman, Mikael Lindstrom, Petri Makela, Kristina Wickholm
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Publication number: 20090221812Abstract: A method for treatment of chemical pulp for the manufacturing of microfibrillated cellulose includes the following steps: a) providing a hemicellulose containing pulp, b) refining the pulp in at least one step and treating the pulp with one or more wood degrading enzymes at a relatively low enzyme dosage, and c) homogenizing the pulp thus providing the microfibrillated cellulose. According to a second aspect of the invention a microfibrillated cellulose obtainable by the method according to the first aspect is provided. According to a third aspect of the invention, use of the microfibrillated cellulose according to the second aspect in food products, paper products, composite materials, coatings or in rheology modifiers (e.g. drilling muds) is provided.Type: ApplicationFiled: January 31, 2007Publication date: September 3, 2009Applicant: STFI- PACKFORSK ABInventors: Mikael Ankerfors, Tom Lindstrom, Gunnar Henriksson
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Patent number: 6551457Abstract: A process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises draining the suspension to obtain a paper web and subjecting the obtained paper web to impulse pressing by passage through at least one press nip having at least one heated roll which is in contact with the web and heated to a temperature above 100° C., wherein a chemical system comprising a polymer component and micro- or nanoparticles are added to the suspension or the paper web before the paper web passes the press nip of the impulse unit.Type: GrantFiled: September 20, 2001Date of Patent: April 22, 2003Assignee: Akzo Nobel N.V.Inventors: Caroline Westman, Tom Lindstrom, Janne Laine, Maria Norell
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Publication number: 20020062938Abstract: A process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises draining the suspension to obtain a paper web and subjecting the obtained paper web to impulse pressing by passage through at least one press nip having at least one heated roll which is in contact with the web and heated to a temperature above 100° C., wherein a chemical system comprising a polymer component and micro- or nanoparticles are added to the suspension or the paper web before the paper web passes the press nip of the impulse unit.Type: ApplicationFiled: September 20, 2001Publication date: May 30, 2002Inventors: Caroline Westman, Tom Lindstrom, Janne Laine, Maria Norell
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Patent number: 4911790Abstract: The present invention relates to a process for obtaining retention of the manufacture of paper, whereby one adds a cationic, high polymer polysaccharide at the preparation of a stock of paper pulp; that one adds an anionic aluminium compound, or a combination of an aluminium salt and an alkali or an acid to the formation in situ of such an anionic aluminium compound immediately prior to the head box, whereby pH immediately prior to the head box is kept at pH 7 to 8.Type: GrantFiled: January 6, 1988Date of Patent: March 27, 1990Assignee: STFIInventors: Tom Lindstrom, Hans Hallgren, Fritz Hedborg