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公开(公告)号：US20200347552A1
公开(公告)日：2020-11-05
申请号：US16930335
申请日：2020-07-16
申请人： Kemira Oyj
发明人： KAISA KARISALMI , Tom Lundin , Mikko Virtanen , Antti Laukkanen , Jason McKee
摘要： The invention relates to a method for producing paper, board or the like. The method comprises obtaining a thick stock comprising cellulose fibres, forming a fibrous web and drying of drying the fibrous web. A strength agent system, which comprises at least one synthetic or natural polymer, or their mixture, and microfibrillated parenchymal cellulose material originating from non-wood sources, is added to the thick stock. The invention relates also to paper or board produced by the method.
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公开(公告)号：US09752284B2
公开(公告)日：2017-09-05
申请号：US14442182
申请日：2013-11-12
申请人： Kemira Oyj
发明人： Matti Hietaniemi , Mikko Virtanen , Emmi Saranpää
CPC分类号： D21H21/18 , D21H17/29 , D21H17/375 , D21H23/04 , D21H27/30
摘要： The invention relates to a method for treating a fiber stock for making of paper, board or the like. The method comprises obtaining a fiber thick stock and adding to the fiber thick stock at least one cationic first agent, and adding separately to the fiber stock and after the addition of the cationic first agent, at least one anionic second agent, which is an water-soluble anionic copolymer of acrylamide, methacrylamide or acrylonitrile, in such amount that the ratio of the added absolute cationic charge to the added absolute anionic charge is from 1:0.1 to 1:0.95. The invention relates also to the product prepared by using a fiber stock, which is treated by using the method.
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公开(公告)号：US09080288B2
公开(公告)日：2015-07-14
申请号：US14372658
申请日：2013-01-16
申请人： KEMIRA OYJ
发明人： Matti Hietaniemi , Mikko Virtanen , Jonni Ahlgren
IPC分类号： D21H17/45 , D21H17/37 , C09C3/10 , C08K3/00 , D21H21/00 , D21H21/52 , C09C1/42 , C09C1/00 , C08K3/34 , C08K9/08
CPC分类号： D21H17/375 , C01P2004/50 , C01P2004/61 , C01P2006/12 , C08K3/013 , C08K3/346 , C08K9/08 , C09C1/0081 , C09C1/0084 , C09C1/42 , C09C3/10 , D21H17/45 , D21H17/455 , D21H21/00 , D21H21/52
摘要： The invention relates to a method for producing paper, board or the like. In the method is obtained an aqueous filler dispersion, comprising particles of at least one first filler, the filler dispersion having a floc size distribution with original mean chord length value. The particles of the first mineral filler are brought into a contact with a cationic pre-treatment agent, which is capable of initiating flocculation of the filler particles in the dispersion, whereby a pre-treated filler dispersion comprising flocs, which comprise first mineral particles, is formed. The pre-treated filler dispersion is combined with a stock of fibers. The floc size distribution of the filler dispersion is changed with the pre-treatment agent, which is a natural and/or synthetic polymer, so that the mean chord length value increases at least with 2% from the original mean chord length value. The invention relates also to an agglomerate comprising at least one first mineral filler particle, a plurality of second mineral filler particles attached to at least one first filler particle by a pre-treatment agent, which is a natural and/or synthetic polymer. The average particle size by weight of the first mineral filler particles is 1.5-4.0 μm, the average particle size by weight of the second mineral filler particles is 0.5-2.4 μm, provided that the second mineral filler particles are smaller than the first mineral filler particles, and the mean chord length of the agglomerate is
摘要翻译： 本发明涉及纸，纸板等的制造方法。 在该方法中获得包含至少一种第一填料的颗粒的填料分散体，所述填料分散体具有原始平均弦长值的絮状尺寸分布。 使第一矿物填料的颗粒与阳离子预处理剂接触，阳离子预处理剂能够引发分散体中填料颗粒的絮凝，由此包含絮凝物的预处理填料分散体包含第一矿物颗粒， 形成了。 预处理的填料分散体与纤维原料组合。 填料分散体的絮凝物尺寸分布随着作为天然和/或合成聚合物的预处理剂而改变，使得平均弦长值至少比原始平均弦长值增加2％。 本发明还涉及包含至少一种第一矿物填料颗粒，多个第二矿物填料颗粒的附聚物，其通过预处理剂附着至至少一种第一填料颗粒，其为天然和/或合成聚合物。 第一矿物填料颗粒的平均粒径为1.5-4.0μm，第二矿物填料颗粒的平均粒径为0.5-2.4μm，条件是第二矿物填料颗粒小于第一矿物填料 颗粒，并且附聚物的平均弦长<40μm。
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公开(公告)号：US20190242065A1
公开(公告)日：2019-08-08
申请号：US16319362
申请日：2017-09-26
申请人： Kemira Oyj
发明人： Matti Hietaniemi , Asko Karppi , Mikko Virtanen
CPC分类号： D21H21/18 , D21H17/29 , D21H17/375 , D21H17/43 , D21H17/71 , D21H17/72 , D21H21/10 , D21H23/10
摘要： The invention relates to an aqueous dry strength composition suitable for use in manufacture of paper, board or the like. The composition includes a mixture of a synthetic polymer component, which is a copolymer of acrylamide and at least one anionic monomer, and a cationic starch component. The polymer component has an anionicity of 1-60 mol-%. The synthetic polymer component and cationic starch component provide the composition with a charge density in the range of 0.05-1 meq/g, when measured at pH 2.8, and 0.2-−3 meq/g, when measured at pH 7.0. The invention also relates to a method for making of paper, board or the like, where the dry strength composition is diluted with water, and the solution of the dry strength composition is added to the fibre stock before or after the addition of a cationic strength agent.
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公开(公告)号：US09605382B2
公开(公告)日：2017-03-28
申请号：US14774906
申请日：2014-03-07
申请人： KEMIRA OYJ
发明人： Mikko Virtanen
摘要： The invention relates to a process for production of paper or board comprising providing a stock comprising cellulose fibers, adding a mixture comprising microfibrillated cellulose and a strength additive to the stock, adding a microparticle to the stock after the addition of said mixture, dewatering the stock on a wire to form a web, and drying the web.
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公开(公告)号：US11131062B2
公开(公告)日：2021-09-28
申请号：US16930335
申请日：2020-07-16
申请人： Kemira Oyj
发明人： Kaisa Karisalmi , Tom Lundin , Mikko Virtanen , Antti Laukkanen , Jason McKee
摘要： The invention relates to a method for producing paper, board or the like. The method comprises obtaining a thick stock comprising cellulose fibres, forming a fibrous web and drying of drying the fibrous web. A strength agent system, which comprises at least one synthetic or natural polymer, or their mixture, and microfibrillated parenchymal cellulose material originating from non-wood sources, is added to the thick stock. The invention relates also to paper or board produced by the method.
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公开(公告)号：US10767312B2
公开(公告)日：2020-09-08
申请号：US16062710
申请日：2016-12-15
申请人： Kemira Oyj
发明人： Kaisa Karisalmi , Tom Lundin , Mikko Virtanen , Antti Laukkanen , Jason McKee
摘要： The invention relates to a method for producing paper, board or the like. The method comprises obtaining a thick stock comprising cellulose fibres, forming a fibrous web and drying of drying the fibrous web. A strength agent system, which comprises at least one synthetic or natural polymer, or their mixture, and microfibrillated parenchymal cellulose material originating from non-wood sources, is added to the thick stock. The invention relates also to paper or board produced by the method.
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公开(公告)号：US11214927B2
公开(公告)日：2022-01-04
申请号：US16610101
申请日：2018-06-13
申请人： Kemira Oyj
IPC分类号： D21F1/02 , D21H21/20 , D21F9/00 , D21F11/04 , D21H11/14 , D21H17/25 , D21H17/28 , D21H17/42 , D21H17/45 , D21H27/38
摘要： 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.
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公开(公告)号：US11066546B2
公开(公告)日：2021-07-20
申请号：US16468307
申请日：2017-07-05
申请人： Kemira Oyj
发明人： Asko Karppi , Matti Hietaniemi , Martina Halinen , Salla Timperi , Vladimir Grigoriev , Mikko Virtanen
摘要： A cationic glyoxylated polyacrylamide polymer composition having improved storage stability for use in manufacture of paper, board or the like, which aqueous composition includes a glyoxylated polyacrylamide polymer having a cationic charge density in a range of 0.8-1.8 meq/g of dry polymer in dry content of 5-15% and a buffering acid. The aqueous composition has pH in a range of 2.2-4.0 and a viscosity of less than 80 mPas measured at 25° C. by using a Brookfield viscometer after 30 days storage at 35° C. or after 60 days storage at 23° C.
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公开(公告)号：US10781556B2
公开(公告)日：2020-09-22
申请号：US16319362
申请日：2017-09-26
申请人： Kemira Oyj
发明人： Matti Hietaniemi , Asko Karppi , Mikko Virtanen
摘要： The invention relates to an aqueous dry strength composition suitable for use in manufacture of paper, board or the like. The composition includes a mixture of a synthetic polymer component, which is a copolymer of acrylamide and at least one anionic monomer, and a cationic starch component. The polymer component has an anionicity of 1-60 mol-%. The synthetic polymer component and cationic starch component provide the composition with a charge density in the range of 0.05-1 meq/g, when measured at pH 2.8, and 0.2-−3 meq/g, when measured at pH 7.0. The invention also relates to a method for making of paper, board or the like, where the dry strength composition is diluted with water, and the solution of the dry strength composition is added to the fibre stock before or after the addition of a cationic strength agent.
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