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    Dry strength composition, its use and method for making of paper, board or the like
    4.
    发明授权
    Dry strength composition, its use and method for making of paper, board or the like 有权

    公开(公告)号：US10781556B2

    公开(公告)日：2020-09-22

    申请号：US16319362

    申请日：2017-09-26

    Applicant: Kemira Oyj

    Inventor： Matti Hietaniemi ,  Asko Karppi ,  Mikko Virtanen

    IPC: D21H21/18 ,  D21H17/29 ,  D21H17/43 ,  D21H17/00 ,  D21H23/10 ,  D21H17/37 ,  D21H21/10

    Abstract: 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.

    METHOD FOR MAKING OF PAPER, TISSUE, BOARD OR THE LIKE
    5.
    发明申请
    METHOD FOR MAKING OF PAPER, TISSUE, BOARD OR THE LIKE 有权
    制作纸，纸巾，纸板等的方法

    公开(公告)号：US20150041092A1

    公开(公告)日：2015-02-12

    申请号：US14380323

    申请日：2013-02-22

    Applicant: KEMIRA OYJ

    Inventor： Matti Hietaniemi ,  Kimmo Strengell ,  Asko Karppi ,  Marko Kolari ,  Jaakko Ekman

    IPC: D21H17/66 ,  D21H17/63 ,  D21H17/55

    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 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.

    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。

    Polymer composition, its use and a surface size
    6.
    发明授权
    Polymer composition, its use and a surface size 有权

    公开(公告)号：US11447618B2

    公开(公告)日：2022-09-20

    申请号：US16078140

    申请日：2017-02-28

    Applicant: Kemira Oyj

    Inventor： Matti Hietaniemi ,  Asko Karppi ,  Rosa Carceller

    IPC: C08L3/02 ,  C08F2/10 ,  C08F220/56 ,  C08K5/092 ,  D21H21/16

    Abstract: The invention relates to a water-soluble polymer composition obtained by polymerizing in an aqueous polymerisation medium, which comprises degraded starch, at least following monomers: acrylamide and/or methacrylamide, and >2 mol-% of at least one unsaturated mono- or dicarboxylic acid(s) or salts thereof. The polymer composition has an anionic net charge at pH 7 and a dry solids content of >5 weight-%. The invention relates also to the use of the polymer composition for surface sizing of paper, board or the like as well as to a surface size composition comprising it.

    Polymer product for improving retention of hydrophobic internal sizing agents in manufacture of paper or board
    7.
    发明授权
    Polymer product for improving retention of hydrophobic internal sizing agents in manufacture of paper or board 有权

    公开(公告)号：US11339539B2

    公开(公告)日：2022-05-24

    申请号：US16759367

    申请日：2018-10-31

    Applicant: Kemira Oyj

    Inventor： Timo Valkealaakso ,  Simo-Pekka Vanninen ,  Asko Karppi

    IPC: D21H21/16 ,  D21H17/16 ,  D21H17/17 ,  D21H17/37 ,  D21H17/62 ,  D21H21/10

    Abstract: A method for manufacturing paper or board is disclosed and further disclosed is an internal sizing system for providing improved retention of hydrophobic internal sizing agents. The internal sizing system includes a hydrophobic internal sizing agent as a first component selected from a group consisting of alkenyl succinic anhydride (ASA), alkyl ketene dimer (AKD), rosin sizes and any combination thereof, and a water-soluble polymer product including amphoteric polyacrylamide as a second component, which amphoteric polyacrylamide has neutral or cationic net charge at pH 7, a weight-average molecular weight of 700,000-18,000,000 g/mol and a total ionicity of 4-28 mol-%, where the first component and the second component are provided as separate components or as a combination of the first component and the second component.

    Water soluble cross-linked block copolymers
    8.
    发明授权
    Water soluble cross-linked block copolymers 有权

    公开(公告)号：US10189935B2

    公开(公告)日：2019-01-29

    申请号：US15300076

    申请日：2015-04-10

    Applicant: KEMIRA OYJ

    Inventor： Asko Karppi ,  Matti Hietaniemi ,  Sacha Legrand

    IPC: B01J41/14 ,  C02F11/14 ,  C08F293/00 ,  D21H17/37 ,  D21H21/10 ,  D21H21/18 ,  C02F1/56 ,  C08F4/04 ,  C08F4/36

    Abstract: The invention provides new water soluble polymers for the use in industrial processes, where large quantities of water is handled, such as sludge dewatering and papermaking. These new polymers are water soluble cross-linked block copolymers, wherein the block copolymers are cross-linked together using a cross-linking agent. Each of the block copolymers contain two different blocks, and these blocks are formed from different monomers. The blocks are linked together with a molecular spacer derived from a bifunctional initiator used during the polymerization of the blocks. The monomers used in polymerizing the blocks are different with each other and they are selected from a group consisting of N-vinylformamide, acrylic acid, acrylamide and water-soluble derivatives thereof.

    Polymer composition, its use and a surface size
    10.
    发明申请
    Polymer composition, its use and a surface size 有权

    公开(公告)号：US20210189101A1

    公开(公告)日：2021-06-24

    申请号：US16078140

    申请日：2017-02-28

    Applicant: Kemira Oyj

    Inventor： Matti Hietaniemi ,  Asko Karppi ,  Rosa Carceller

    IPC: C08L3/02 ,  C08F220/56 ,  C08F2/10 ,  C08K5/092 ,  D21H21/16

    Abstract: The invention relates to a water-soluble polymer composition obtained by polymerizing in an aqueous polymerisation medium, which comprises degraded starch, at least following monomers: acrylamide and/or methacrylamide, and >2 mol-% of at least one unsaturated mono- or dicarboxylic acid(s) or salts thereof. The polymer composition has an anionic net charge at pH 7 and a dry solids content of >5 weight-%. The invention relates also to the use of the polymer composition for surface sizing of paper, board or the like as well as to a surface size composition comprising it.

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