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公开(公告)号：US10787768B2
公开(公告)日：2020-09-29
申请号：US16317590
申请日：2017-09-04
Applicant: Kemira Oyj
Inventor： Matti Hietaniemi , Jaakko Ekman , Asko Karppi , Kimmo Strengell
IPC: D21H17/37 , D21H17/45 , D21H17/14 , D21H17/42 , D21H21/10 , D21H21/36 , D21H23/18 , D21H21/18 , D21H17/15 , D21H11/04 , D21H11/14
Abstract: 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.
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公开(公告)号：US10767315B2
公开(公告)日：2020-09-08
申请号：US16078034
申请日：2017-03-22
Applicant: Kemira Oyj
Inventor： Matti Hietaniemi , Asko Karppi
Abstract: Drainage and press dewatering system for manufacture of paper, board or the like, comprising (a) amphoteric polyacrylamide, which is a copolymer obtained by polymerizing (meth)acrylamide and 1-80 mol-% of cationic monomers and/or 0.1-70 mol-% of anionic monomers, the polyacrylamide having an intrinsic viscosity in the range of 6-38 dl/g, (b) inorganic microparticles of siliceous material, such as colloidal silica or bentonite, and (c) a high-charged cationic coagulant having a charge density over 5 meq/g and preferably over 6 meq/g determined at pH 6 and selected from aluminium based coagulants, organic polymers and mixtures thereof.
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公开(公告)号：US20200063340A1
公开(公告)日：2020-02-27
申请号：US16462570
申请日：2017-12-15
Applicant: Kemira Oyj
Inventor： Matti Hietaniemi , Rosa Carceller , Asko Karppi , Joonas Likander , Jyri Välimäki
IPC: D21C9/18 , D21C5/02 , D21H21/10 , D21H17/45 , D21H23/04 , C02F1/54 , C02F11/147 , C02F11/126 , C02F11/125
Abstract: A method is disclosed for dewatering of sludge from a pulp, paper or board making process, such as deinking sludge, including obtaining of an aqueous sludge including an aqueous phase and a fibre material suspended in the aqueous phase. The sludge is subjected to a pre-thickening step, where a first part of the aqueous phase is removed from the sludge and to a pressing step, where a second part of the aqueous phase is removed from the sludge, thereby obtaining a dry pressed sludge. Before or at the pre-thickening step a polymer composition having a charge density of at the most 1.7 meq/g, preferably at most 1.5 meq/g, more preferably at most 1.1 meq/g, is added to the sludge.
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公开(公告)号：US09279217B2
公开(公告)日：2016-03-08
申请号：US14380323
申请日：2013-02-22
Applicant: KEMIRA OYJ
Inventor： Matti Hietaniemi , Kimmo Strengell , Asko Karppi , Marko Kolari , Jaakko Ekman
CPC classification number: D21H17/66 , D21H11/14 , D21H17/28 , D21H17/37 , D21H17/55 , D21H17/63 , D21H27/002
Abstract: 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.
Abstract translation: 本发明涉及通过使用再生纤维材料作为原料来制造纸，纸板，纸板等的方法。 该方法包括以下步骤：在碎浆机中制浆再循环的纸，板等，并获得纸浆流，其包含（i）水相和（ii）至少回收的纤维和低分子量的淀粉，其分散在水性 相; 向纸浆流中加入凝结剂或包含低分子量淀粉的含水工艺流程; 使凝结剂与低分子量的淀粉相互作用并任选地形成聚集体; 在加入凝结剂之后，将至少一种絮凝剂加入到包含相互作用的凝结剂的任何流动中，并用包含附聚物的淀粉形成经处理的流体; 将所述聚集体和/或所述附聚物的至少一部分保留在所形成的纤维或纤维网上。
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公开(公告)号：US20150068697A1
公开(公告)日：2015-03-12
申请号：US14387369
申请日：2013-03-22
Applicant: KEMIRA OYJ
Inventor： Asko Karppi , Esko Tirronen
CPC classification number: D21H17/29 , C08G73/022 , C08G73/0286 , C08G73/0293 , C08L3/08 , C08L79/02 , D21H17/375 , D21H17/44 , D21H17/45 , D21H17/455 , D21H17/54 , D21H17/55 , D21H17/56 , D21H21/06 , D21H21/10 , D21H21/18
Abstract: The invention relates to a method for dissolving cationic starch. In the method is obtained an aqueous polyelectrolyte solution comprising a synthetic cationic polymer, which has a charge density value of at least 0.1 meq/g, determined at pH3, the concentration of the cationic polymer in the polyelectrolyte solution being >2.5 weight-%, and the aqueous polyelectrolyte solution is brought together with cationic starch having a degree of substitution, DS, >0.1. The cationic starch is dissolved to the polyelectrolyte solution by heating and/or mixing. The invention relates also to a papermaking agent comprising 2-40 weight-% of synthetic cationic polymer which has a charge density value of at least 0.1 meq/g, determined at p H 3, and 2.5-25 weight-% cationic starch having degree of substitution, DS, >0.1. The papermaking agent is in slurry form and has a viscosity of 50-20 000 m Pas, measured at 25° C. with Brookfield DVI+ viscometer.
Abstract translation: 本发明涉及一种溶解阳离子淀粉的方法。 在该方法中，获得包含合成阳离子聚合物的水溶液聚电解质溶液，该聚合物的电荷密度值至少为0.1meq / g，在pH3下测定，阳离子聚合物在聚电解质溶液中的浓度> 2.5重量％ 并且将聚合电解质水溶液与具有取代度DS'> 0.1的阳离子淀粉一起使用。 通过加热和/或混合将阳离子淀粉溶解到聚电解质溶液中。 本发明还涉及一种造纸剂，其包含2-40重量％的合成阳离子聚合物，其电荷密度值至少为0.1meq / g，在p H 3和2.5-25重量％阳离子淀粉具有度 的替代，DS，> 0.1。 造纸剂为浆液形式，并且在25℃下用Brookfield DVI +粘度计测量粘度为50-20,000mPa·s。
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Patent Agency Ranking
公开(公告)号：US11655593B2
公开(公告)日：2023-05-23
申请号：US17252295
申请日：2019-07-10
Applicant: Kemira Oyj
Inventor： Matti Hietaniemi , Asko Karppi , Jukka Rautiainen
CPC classification number: D21H11/08 , D21H11/14 , D21H17/29 , D21H17/375 , D21H17/55 , D21H27/005 , D21H27/10 , D21H27/30
Abstract: A method for manufacturing a multi-layered fibrous web is disclosed, which includes at least two fibrous layers, where each layer is formed from one or more fibre stocks. The fibrous layers are combined prior to subjecting the multilayered fibrous web to wet-pressing and drying. At least one layer of the multi-layered fibrous web is formed from a fibre stock including at least 50 weight-% of a chemi-thermomechanical pulp (CTMP), a hardwood kraft pulp and/or a recycled fibre material calculated from a thick stock applied to a particular layer approach system. A first strength component and a second strength component are added to the fibre stock. The first strength component includes a cationic strength agent and the second strength component includes a synthetic amphoteric polymer composition having a net charge from −3 to +1 meq/g (dry), at a pH of 7.
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公开(公告)号：US11427965B2
公开(公告)日：2022-08-30
申请号：US16969992
申请日：2019-01-18
Applicant: Kemira Oyj
Inventor： Matti Hietaniemi , Asko Karppi , Jonas Konn
Abstract: A dry strength composition for manufacture of paper, board or the like is disclosed. The dry strength composition includes, as a mixture, at least one anionically derivatized polysaccharide, and cationic starch having an amylopectin content ≥80 weight-%. The anionically derivatized polysaccharide and the cationic starch provide the composition with a charge density in a range of 0.1-1.5 meq/g, when measured at pH 2.8, and −0.1-−3 meq/g, preferably −0.3-−2.5 meq/g, more preferably −0.5-−2.0 meq/g, when measured as an aqueous solution, at pH 7.0. Further disclosed are a use of the composition and a method for manufacturing paper, board or the like.
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公开(公告)号：US20210301473A1
公开(公告)日：2021-09-30
申请号：US16341464
申请日：2017-11-22
Applicant: KEMIRA OYJ
Inventor： Matti Hietaniemi , Asko Karppi , Maarit Latvanen , Elsa Olmos
IPC: D21H21/02 , C08F220/56 , D21H17/45 , D21H17/68 , D21H17/00 , D21H23/04 , D21H11/14 , D21F1/02 , D21F1/10
Abstract: The invention relates to a use of a water-soluble polymer product comprising amphoteric polyacrylamide, which has neutral or cationic net charge at pH 7, a weight-average molecular weight of 2 500 000-18 000 000 g/mol and a total ionicity of 4-28 mol-%. The polymer product is used for controlling deposit formation caused by hydrophobic substances in manufacture of paper or board, where a fibre web is formed from an aqueous suspension of fibres. The invention relates also to a method for controlling deposit formation caused by hydrophobic substances in manufacture of paper or board, where a fibre web is formed from an aqueous suspension of fibres, as well as to produced paper or board.
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公开(公告)号：US20210102343A1
公开(公告)日：2021-04-08
申请号：US16969992
申请日：2019-01-18
Applicant: Kemira Oyj
Inventor： Matti Hietaniemi , Asko Karppi , Jonas Konn
Abstract: A dry strength composition for manufacture of paper, board or the like is disclosed. The dry strength composition includes, as a mixture, at least one anionically derivatized polysaccharide, and cationic starch having an amylopectin content ≥80 weight-%. The anionically derivatized polysaccharide and the cationic starch provide the composition with a charge density in a range of 0.1-1.5 meq/g, when measured at pH 2.8, and −0.1-−3 meq/g, preferably −0.3-−2.5 meq/g, more preferably −0.5-−2.0 meq/g, when measured as an aqueous solution, at pH 7.0. Further disclosed are a use of the composition and a method for manufacturing paper, board or the like.
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公开(公告)号：US10590604B2
公开(公告)日：2020-03-17
申请号：US15546069
申请日：2016-01-26
Applicant: Kemira Oyj
Inventor： Asko Karppi , Matti Hietaniemi , Anneli Lepo , Kimmo Strengell
Abstract: 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.
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