Patents by Inventor Kimmo Strengell
Kimmo Strengell 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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Publication number: 20230122111Abstract: The invention relates to a composition and method for manufacture of paper, board, tissue or the like. The composition comprises an amphoteric polymer component, which has a weight average molecular weight of at least 600 000 g/mol, preferably at least 1 000 000 g/mol, more preferably at least 2 000 000 g/mol, and at least one synthetic cationic polymer component, which is a copolymer of a polyamidoamine and has a weight average molecular weight ?550 000 g/mol, preferably ?500 000 g/mol, more preferably ?400 000 g/mol and dispersity index more than 15, preferably more than 20, more preferably more than 25.Type: ApplicationFiled: March 4, 2021Publication date: April 20, 2023Inventors: Kimmo Strengell, Asko KARPPI
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Patent number: 11214927Abstract: A method is disclosed for increasing strength properties, preferably burst strength and SCT strength, of a paper or board product. The paper or board product is manufactured from a fibrous web produced by a multilayer headbox, where an aqueous layer is formed between at least a first and a second fibre layer formed from fibrous stock suspension(s), and where feed water for the aqueous layer includes at least one cationic polymer. The method of the invention includes adding an anionic additive selected from a group comprising anionic synthetic organic polymers, anionic polysaccharides, and any of their combinations to the feed water before formation of the aqueous layer.Type: GrantFiled: June 13, 2018Date of Patent: January 4, 2022Assignee: Kemira OyjInventors: Mikko Virtanen, Kimmo Strengell, Juan Cecchini, Matti Hietaniemi
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Patent number: 10787768Abstract: A method for manufacture of paper, board or the like, comprising the step of dissolving a composition into aqueous solution, whereby an aqueous treatment solution is obtained for adding the obtained treatment solution to the pulp. The composition comprising a copolymer of acrylamide and at least one cationic monomer, the copolymer comprising cationic monomers at least 15 mol-%, calculated from total amount of monomers, and an ionic crosslinker agent comprising at least two carboxyl groups, wherein the equivalent ratio of carboxyl groups:cationic monomer is between 1:20 and 1:0.5.Type: GrantFiled: September 4, 2017Date of Patent: September 29, 2020Assignee: Kemira OyjInventors: Matti Hietaniemi, Jaakko Ekman, Asko Karppi, Kimmo Strengell
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Patent number: 10590604Abstract: The invention relates to a water-soluble polymer product in particle form, comprising amphoteric polyacrylamide, which is obtained by gel polymerisation of acrylamide together with anionic and cationic monomers. The amphoteric polyacrylamide has a mass average molecular weight MW of 1 500 000-6 000 000 g/mol, and a total ionicity of 4-15 mol-%, whereby the polymer product has a polymer content of at least 60 weight-%. The invention relates also to uses of the polymer product in paper and board making.Type: GrantFiled: January 26, 2016Date of Patent: March 17, 2020Assignee: Kemira OyjInventors: Asko Karppi, Matti Hietaniemi, Anneli Lepo, Kimmo Strengell
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Publication number: 20200080264Abstract: A method is disclosed for increasing strength properties, preferably burst strength and SCT strength, of a paper or board product. The paper or board product is manufactured from a fibrous web produced by a multilayer headbox, where an aqueous layer is formed between at least a first and a second fibre layer formed from fibrous stock suspension(s), and where feed water for the aqueous layer includes at least one cationic polymer. The method of the invention includes adding an anionic additive selected from a group comprising anionic synthetic organic polymers, anionic polysaccharides, and any of their combinations to the feed water before formation of the aqueous layer.Type: ApplicationFiled: June 13, 2018Publication date: March 12, 2020Applicant: Kemira OyjInventors: Mikko VIRTANEN, Kimmo STRENGELL, Juan CECCHINI, Matti HIETANIEMI
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Publication number: 20190218717Abstract: A method for manufacture of paper, board or the like, comprising the step of dissolving a composition into aqueous solution, whereby an aqueous treatment solution is obtained for adding the obtained treatment solution to the pulp. The composition comprising a copolymer of acrylamide and at least one cationic monomer, the copolymer comprising cationic monomers at least 15 mol-%, calculated from total amount of monomers, and an ionic crosslinker agent comprising at least two carboxyl groups, wherein the equivalent ratio of carboxyl groups:cationic monomer is between 1:20 and 1:0.5.Type: ApplicationFiled: September 4, 2017Publication date: July 18, 2019Applicant: Kemira OyjInventors: Matti HIETANIEMI, Jaakko EKMAN, Asko KARPPI, Kimmo STRENGELL
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Publication number: 20180016746Abstract: The invention relates to a water-soluble polymer product in particle form, comprising amphoteric polyacrylamide, which is obtained by gel polymerisation of acrylamide together with anionic and cationic monomers. The amphoteric polyacrylamide has a mass average molecular weight MW of 1500000-6000000 g/mol, and a total ionicity of 4-15 mol-%, whereby the polymer product has a polymer content of at least 60 weight-%. The invention relates also to uses of the polymer product in paper and board making.Type: ApplicationFiled: January 26, 2016Publication date: January 18, 2018Applicant: Kemira OyjInventors: Asko Karppi, Matti Hietaniemi, Anneli Lepo, Kimmo Strengell
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Patent number: 9279217Abstract: The invention relates to a method for making of paper, tissue, board or the like by using recycled fiber material as a raw material. The method comprises following steps: pulping recycled paper, board or the like in a pulper and obtaining a pulp flow comprising (i) an aqueous phase and (ii) at least recycled fibers and starch having low molecular weight, which are dispersed in the aqueous phase; adding a coagulant agent to the pulp flow or to an aqueous process flow comprising starch having low molecular weight; allowing the coagulant agent to interact with the starch having low molecular weight and optionally forming aggregates; and adding at least one flocculating agent, after the addition of the coagulant agent, to any flow, which comprises interacted coagulant agent, and forming a treated flow with starch comprising agglomerate(s); retaining at least part of the said aggregates and/or the said agglomerates to the fibers or to a web, which is formed.Type: GrantFiled: February 22, 2013Date of Patent: March 8, 2016Assignee: KEMIRA OYJInventors: Matti Hietaniemi, Kimmo Strengell, Asko Karppi, Marko Kolari, Jaakko Ekman
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Publication number: 20150041092Abstract: The invention relates to a method for making of paper, tissue, board or the like by using recycled fibre material as a raw material. The method comprises following steps: pulping recycled paper, board or the like in a pulper and obtaining a pulp flow comprising (i) an aqueous phase and (ii) at least recycled fibres and starch having low molecular weight, which are dispersed in the aqueous phase; adding a coagulant agent to the pulp flow or to an aqueous process flow comprising starch having low molecular weight; allowing the coagulant agent to interact with the starch having low molecular weight and optionally forming aggregates; and adding at least one flocculating agent, after the addition of the coagulant agent, to any flow, which comprises interacted coagulant agent, and forming a treated flow with starch comprising agglomerate(s); retaining at least part of the said aggregates and/or the said agglomerates to the fibres or to a web, which is formed.Type: ApplicationFiled: February 22, 2013Publication date: February 12, 2015Inventors: Matti Hietaniemi, Kimmo Strengell, Asko Karppi, Marko Kolari, Jaakko Ekman
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Patent number: 8052841Abstract: The invention relates to a process for manufacturing paper, in which a filler is pretreated and suspended to form an aqueous slurry, the aqueous slurry obtained is combined with an aqueous suspension containing cellulose fibers to form a stock, the stock obtained is treated at least with a cationic retention agent and the treated stock is filtered to form paper. Retention and optical properties are improved by the filler being pre-treated with inorganic colloidal particles having an average size less than 100 nm.Type: GrantFiled: April 14, 2004Date of Patent: November 8, 2011Assignee: Kemira OyjInventors: Jonni Ahlgren, Kimmo Strengell
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Publication number: 20080035293Abstract: The invention relates to a process for manufacturing paper, in which a filler is pretreated and suspended to form an aqueous slurry, the aqueous slurry obtained is combined with an aqueous suspension containing cellulose fibres to form a stock, the stock obtained is treated at least with a cationic retention agent and the treated stock is filtered to form paper. Retention and optical properties are improved by the filler being pre-treated with inorganic colloidal particles having an average size less than 100 nm.Type: ApplicationFiled: April 14, 2004Publication date: February 14, 2008Applicant: KEMIRA OYJInventors: Jonni Ahlgren, Kimmo Strengell
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Patent number: 6712934Abstract: The invention relates to a method for the production of paper or board, wherein retention aids are added to the stream of stock. Improved retention and more effective dewatering are achieved by adding to the stream of stock a cationic polymer solution and a suspension-form microparticle mixture composed of a swellable clay of the smectite group and a colloidal synthetic metal silicate in which the prevalent cation is magnesium.Type: GrantFiled: May 31, 2002Date of Patent: March 30, 2004Assignee: Kemira Chemicals OyInventors: Jonni Ahlgren, Kimmo Strengell
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Publication number: 20030079848Abstract: The invention relates to a method for the production of paper or board, wherein retention aids are added to the stream of stock. Improved retention and more effective dewatering are achieved by adding to the stream of stock a cationic polymer solution and a suspension-form microparticle mixture composed of a swellable clay of the smectite group and a colloidal synthetic metal silicate in which the prevalent cation is magnesium.Type: ApplicationFiled: May 31, 2002Publication date: May 1, 2003Inventors: Jonni Ahlgren, Kimmo Strengell