公开(公告)号：US20160319485A1

公开(公告)日：2016-11-03

申请号：US15108671

申请日：2014-12-17

Applicant: KEMIRA OYJ

Inventor： Matti HIETANIEMI ,  Mikko VIRTANEN

IPC: D21H11/18 ,  D21H17/67 ,  D21H17/34 ,  C08L33/26 ,  D21H21/18 ,  C08L39/02 ,  C08L1/02 ,  C09C1/02 ,  D21H17/37

CPC classification number: D21H11/18 ,  C01P2006/22 ,  C01P2006/60 ,  C08L1/02 ,  C08L33/26 ,  C08L39/02 ,  C09C1/021 ,  D21H17/25 ,  D21H17/34 ,  D21H17/375 ,  D21H17/56 ,  D21H17/67 ,  D21H17/675 ,  D21H17/69 ,  D21H21/18

Abstract: The present invention relates to a filler aggregate composition comprising filler particles of ground calcium carbonate (GCC); a pretreatment agent selected from polyvinylamine (PVAM) and cationic polyacrylamide (CPAM), or a mixture thereof; and a nanofibrillar cellulose (NFC); wherein said filler aggregate composition is in the form of a slurry, wherein said pretreatment agent has an average molecular weight below 6000000 g/mol and a has a charge density below 7 meq/g, determined at pH 7, and the nanofibrillar cellulose is present in an amount of about 0.1-40% of the dry weight of the filler particles. Further it also relates to its method of production, and its use in stocks, paper and paper board.

Abstract translation: 本发明涉及包含研磨碳酸钙（GCC）的填料颗粒的填料聚集体组合物; 选自聚乙烯胺（PVAM）和阳离子聚丙烯酰胺（CPAM）的预处理剂或其混合物; 和纳米纤维素纤维素（NFC）; 其中所述填料聚集体组合物为浆料形式，其中所述预处理剂的平均分子量低于6000000g / mol，a具有低于7meq / g的电荷密度，在pH7下测定，并且存在纳米纤维素纤维素 其量为填料颗粒干重的约0.1-40％。 此外，它还涉及其生产方法及其在库存，纸张和纸板中的使用。

公开(公告)号：US20160319487A1

公开(公告)日：2016-11-03

申请号：US15108670

申请日：2014-12-17

Applicant: KEMIRA OYJ ,  UPM-KYMMENE CORPORATION ,  STORA ENSO OYJ

Inventor： Matti HIETANIEMI ,  Mikko VIRTANEN ,  Katariina TORVINEN ,  Terhi SAARI ,  Hellen ERKKI

IPC: D21H17/67 ,  D21H21/18 ,  D21H17/34 ,  D21H11/18 ,  D21H17/37

CPC classification number: D21H17/675 ,  D21H11/18 ,  D21H17/34 ,  D21H17/375 ,  D21H17/69 ,  D21H21/18

Abstract: The present invention relates to a method for providing a pretreated filler composition for use in paper and board manufacturing including the steps of: a) providing a filler comprising precipitated calcium carbonate, said filler being in the form of a slurry comprising no additives; b) providing at least one polymer selected from polyvinylamine or polyacrylic amide, said polymer having a charge density of an absolute value of at most 4 meq/g determined at pH 7; c) combining said at least one polymer of step b) with the filler of step a); d) providing a slurry of nanofibrillar cellulose; e) combining said nanofibrillar cellulose slurry with the formed combination of step c) and forming a pretreated filler composition comprising aggregates. Further it also relates to a pretreated filler composition prepared therefrom, and its use in stocks, paper and paper board.

Abstract translation: 本发明涉及一种用于提供用于纸和纸板制造的预处理填料组合物的方法，包括以下步骤：a）提供包含沉淀碳酸钙的填料，所述填料为不含添加剂的浆料形式; b）提供至少一种选自聚乙烯胺或聚丙烯酰胺的聚合物，所述聚合物的电荷密度在pH7下测定为绝对值至多4meq / g; c）将步骤b）的所述至少一种聚合物与步骤a）的填料结合; d）提供纳米纤维素纤维素浆料; e）将所述纳米纤维素纤维素浆料与所形成的步骤c）的组合结合并形成包含聚集体的预处理填料组合物。 此外，它还涉及由其制备的预处理填料组合物，以及其在原料，纸和纸板中的用途。

公开(公告)号：US20200080264A1

公开(公告)日：2020-03-12

申请号：US16610101

申请日：2018-06-13

Applicant: Kemira Oyj

Inventor： Mikko VIRTANEN ,  Kimmo STRENGELL ,  Juan CECCHINI ,  Matti HIETANIEMI

IPC: D21H21/20 ,  D21H17/25 ,  D21F9/00 ,  D21F1/02 ,  D21F11/04 ,  D21H17/28 ,  D21H17/42 ,  D21H17/45 ,  D21H27/38 ,  D21H11/14

Abstract: 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.

公开(公告)号：US20160032530A1

公开(公告)日：2016-02-04

申请号：US14774906

申请日：2014-03-07

Applicant: KEMIRA OYJ

Inventor： Mikko VIRTANEN

IPC: D21H17/28 ,  D21H17/68 ,  D21H17/37

CPC classification number: D21H17/28 ,  D21H17/375 ,  D21H17/63 ,  D21H17/68 ,  D21H17/69 ,  D21H21/10 ,  D21H21/18

Abstract: 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.

Abstract translation: 本发明涉及一种生产纸或纸板的方法，包括提供包含纤维素纤维的原料，向原料中加入包含微纤化纤维素和强度添加剂的混合物，在加入所述混合物之后向原料加入微粒，使原料脱水 在网上形成网，并干燥网。

公开(公告)号：US20230053998A1

公开(公告)日：2023-02-23

申请号：US17794618

申请日：2021-01-22

Applicant: KEMIRA OYJ

Inventor： Mikko VIRTANEN ,  Kaisa KARISALMI ,  Sanna LEHTO ,  Jan-Luiken HEMMES

IPC: D21H11/18 ,  D21H17/29 ,  D21H17/25 ,  D21H17/45 ,  D21H21/20 ,  D21H21/10 ,  D21H23/04

Abstract: A product includes a microfibrillated cellulose composition, a starch derivative, and an anionic cellulose derivative, as a combined preparation for simultaneous or separate use. The anionic cellulose derivative has a number average molecular weight comprised between 300000 g/mol and 800000 g/mol, and a degree of substitution comprised between 0.3 and 0.65. Additionally, a paper sheet includes the product as an additive to increase the initial wet web strength and/or dry tensile strength of the paper sheet.

公开(公告)号：US20200079950A1

公开(公告)日：2020-03-12

申请号：US16468307

申请日：2017-07-05

Applicant: KEMIRA OYJ

Inventor： Asko KARPPI ,  Matti HIETANIEMI ,  Martina HALINEN ,  Salla Timperi ,  Vladimir GRIGORIEV ,  Mikko VIRTANEN

IPC: C08L33/26 ,  D21H17/55 ,  D21H21/20 ,  D21H23/04

Abstract: 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.