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    A method to produce a fibrous product comprising microfibrillated cellulose
    21.
    发明专利
    A method to produce a fibrous product comprising microfibrillated cellulose 未知

    公开(公告)号：SE1950730A1

    公开(公告)日：2020-12-18

    申请号：SE1950730

    申请日：2019-06-17

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  LYYTIKÄINEN KATJA ,  BACKFOLK KAJ ,  NYLÉN OTTO

    IPC: D21H11/18 ,  B32B27/06 ,  C08J5/18 ,  C08L1/02 ,  D21H17/41 ,  D21H17/66

    Abstract: A method for the production of a fibrous product from a fibrous web, wherein the method comprises the steps of:providing a fibrous suspension comprising native microfibrillated cellulose, wherein the content of the microfibrillated cellulose of said suspension is in the range of 40 to 99.9 weight-% based on total dry solid content, said fibrous suspension further comprising organic acid, a metal salt or a mixture thereof, wherein the amount of organic acid, metal salt or mixture thereof is at least 2 weight-% based on total dry solid content of the suspension,- said fibrous suspension also comprising an uncharged, amphoteric or weakly cationic polymer having a molecular weight of at least 50000 g/mol,- said fibrous suspension also comprising an anionic polymer having a molecular weight of at least 10000 g/mol to said suspension, - providing said suspension to a substrate to form a fibrous web, wherein the amount of uncharged, amphoteric or weakly cationic polymer in said suspension is in the range of 0.1 to 20 kg/metric ton based on total dry solid content and wherein the amount of anionic polymer in said suspension is in the range of 0.01 to 10 kg/metric ton based on total dry solid content; and- dewatering said fibrous web to form a fibrous product.

    A METHOD FOR PRODUCING A MICROFIBRILLATED CELLULOSE WEB
    22.
    发明专利
    A METHOD FOR PRODUCING A MICROFIBRILLATED CELLULOSE WEB 未知

    公开(公告)号：SE2330313A1

    公开(公告)日：2025-01-06

    申请号：SE2330313

    申请日：2023-07-05

    Applicant: STORA ENSO OYJ

    Inventor： KARPPINEN ANNI ,  BACKFOLK KAJ ,  NYLÉN OTTO

    IPC: D21F1/66 ,  C08B15/02 ,  C08B15/08 ,  C08L1/02 ,  D21F3/02 ,  D21H11/14 ,  D21H11/18

    Abstract: The present invention relates to a method for producing a microfibrillated cellulose (MFC) web. The method comprises preparing an MFC suspension and forming a wet MFC web from the MFC suspension by casting on a non-porous support. The wet MFC web positioned on the non-porous support is subjected to water removal by means of dewatering and/or drying to form a dry MFC web. Broke material is discharged and collected. Collected broke material is mixed with water to provide at least one broke suspension wherein at least 90 weight-% of each broke suspension passes a Mesh 30 screen according to SCAN-CM 66:05. The broke suspension(s) is/are subjected to a mechanical treatment. The broke suspension(s) is/are used in the preparation of the MFC suspension. The mechanical treatment is performed to increase the viscosity of the broke suspension(s) to at least 60% of the viscosity of the MFC suspension without the broke suspension(s).

    A METHOD FOR PRODUCING A MICROFIBRILLATED CELLULOSE WEB
    23.
    发明专利
    A METHOD FOR PRODUCING A MICROFIBRILLATED CELLULOSE WEB 未知

    公开(公告)号：SE2350820A1

    公开(公告)日：2024-12-31

    申请号：SE2350820

    申请日：2023-06-30

    Applicant: STORA ENSO OYJ

    Inventor： KARPPINEN ANNI ,  BACKFOLK KAJ ,  NYLÉN OTTO

    IPC: D21F5/00 ,  C08B15/02 ,  C08B15/08 ,  D21F3/02 ,  D21H11/18 ,  H05B6/02

    Abstract: The present invention relates to a method for producing a microfibrillated cellulose (MFC) web. The method comprises providing an MFC suspension (2) comprising water as suspension medium. A wet MFC web (4) is formed of the MFC suspension by casting on a non-porous support (5). The wet MFC web (4) positioned on the nonporous support (5) is subjected to water removal by means of press dewatering and/or non-contact drying to form a dry MFC web (8). The water removal further comprises at least one induction heating step, wherein each induction heating step comprises heating said wet MFC web (4) by means of an induction heated device (10). The dry MFC web (8) is separated from the non-porous support (5).

    Método para produzir um produto fibroso contendo celulose microfibrilada
    27.
    发明专利
    Método para produzir um produto fibroso contendo celulose microfibrilada 未知

    公开(公告)号：BR112021025406A2

    公开(公告)日：2022-02-01

    申请号：BR112021025406

    申请日：2020-06-15

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  BACKFOLK KAJ ,  LYYTIKÄINEN KATJA ,  NYLÉN OTTO

    IPC: B32B27/06 ,  C08J5/18 ,  C08L1/02 ,  D21H11/18 ,  D21H17/41 ,  D21H17/66

    Abstract: método para produzir um produto fibroso contendo celulose microfibrilada. a presente invenção refere-se a um método para a produção de um produto fibroso a partir de uma rede fibrosa, em que o método compreende as etapas de: fornecer uma suspensão fibrosa compreendendo celulose microfibrilada nativa, em que o teor da celulose microfibrilada da referida suspensão é na faixa de 40 a 99,9% em peso com base no teor total de sólidos secos, a referida suspensão fibrosa compreendendo ainda ácido orgânico, um sal metálico ou uma sua mistura, em que a quantidade de ácido orgânico, de sal metálico ou de sua mistura é de pelo menos 2% em peso com base no teor total de sólidos secos da suspensão; a referida suspensão fibrosa compreendendo também um polímero não carregado, anfótero ou fracamente catiônico tendo um peso molecular de pelo menos 50000 g/mol; a referida suspensão fibrosa compreendendo também um polímero aniônico tendo um peso molecular de pelo menos 10000 g/mol para a referida suspensão; fornecer a referida suspensão a um substrato para formar uma rede fibrosa, em que a quantidade de polímero não carregado, anfótero ou fracamente catiônico na referida suspensão é na faixa de 0,1 a 20 kg/tonelada métrica com base no teor total sólidos secos e em que a quantidade de polímero aniônico na referida suspensão é na faixa de 0,01 a 10 kg/tonelada métrica com base no teor total de sólidos secos; e desidratar a referida rede fibrosa para formar um produto fibroso.

    A method for producing a film comprising nanocellulose
    28.
    发明专利
    A method for producing a film comprising nanocellulose 未知

    公开(公告)号：SE544029C2

    公开(公告)日：2021-11-09

    申请号：SE2050317

    申请日：2020-03-23

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  RAHKO JOANNA ,  NYLÉN OTTO ,  PIHKO RIKU

    IPC: C08J5/18 ,  B82Y30/00 ,  C08L1/02 ,  D21F3/02 ,  D21H11/18 ,  D21H19/00

    Abstract: The present invention relates to a method for producing a film comprising nanocellulose, which method comprises: providing a suspension comprising 50-100 weight-% of nanocellulose based on total dry weight; forming a fibrous web of said suspension on a support; providing a press fabric comprising a web-side first surface and an opposite second surface, wherein said press fabric comprises a woven first fabric layer arranged in the press fabric as a layer providing said web-side first surface such that said press fabric has a woven surface structure at said web-side first surface; applying said web-side surface of said press fabric into direct contact with said web; wet-pressing said web by conducting said web, arranged between said press fabric and said support, through a pressing equipment, and drying the dewatered web so as to form said film.

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