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    METHOD FOR DETERMINING FILM THICKNESS, METHOD FOR PRODUCING A FILM AND DEVICE FOR PRODUCING A FILM
    1.
    发明专利
    METHOD FOR DETERMINING FILM THICKNESS, METHOD FOR PRODUCING A FILM AND DEVICE FOR PRODUCING A FILM 未知

    公开(公告)号：SE1951544A1

    公开(公告)日：2021-06-21

    申请号：SE1951544

    申请日：2019-12-20

    Applicant: STORA ENSO OYJ

    Inventor： JÄSBERG ARI ,  PIHKO RIKU ,  NYLÉN OTTO

    Abstract: The present document discloses a method of determining thickness of a wet film, in particular of microfibrillated cellulose. The method comprises conveying said film (20) in a wet state on a conveyor (10) having a conveyor width, the wet film (20) having a film width which is less than the conveyor width, providing a laser projection (1511) across a film edge, acquiring a series of images, each depicting an area of the conveyor, wherein the laser projection, a portion of the film and a portion of an exposed conveyor surface are visible, and using at least some of said images to determine at least one of a film thickness and a film thickness distribution across the film width.The document also discloses a method of forming a film, in particular a microfibrillated cellulose film, and a device for producing such film.

    A METHOD FOR PRODUCING A MICROFIBRILLATED CELLULOSE WEB
    2.
    发明专利
    A METHOD FOR PRODUCING A MICROFIBRILLATED CELLULOSE WEB 未知

    公开(公告)号：SE546696C2

    公开(公告)日：2025-02-11

    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).

    A METHOD FOR PRODUCING A MICROFIBRILLATED CELLULOSE WEB
    3.
    发明专利
    A METHOD FOR PRODUCING A MICROFIBRILLATED CELLULOSE WEB 未知

    公开(公告)号：SE2330305A1

    公开(公告)日：2024-12-30

    申请号：SE2330305

    申请日：2023-06-29

    Applicant: STORA ENSO OYJ

    Inventor： KARPPINEN ANNI ,  BACKFOLK KAJ ,  NYLÉN OTTO

    IPC: D21H11/18 ,  D21F1/66 ,  D21F3/00 ,  D21F5/00 ,  D21F9/00

    Abstract: The present invention relates to a method for producing a microfibrillated cellulose (MFC) web. The method comprises preparing an MFC suspension comprising water as suspension medium. A wet MFC web is formed of the MFC suspension by casting on a non-porous support or on a paper or paperboard substrate positioned on the non-porous support. The wet MFC web formed on the non-porous support or on a paper or paperboard substrate positioned on the non-porous support is subjected to water removal by means of dewatering and/or drying to form the MFC web. Water removed from the wet MFC web by the water removal is collected into at least one water fraction. Optionally, the at least one water fraction is subjected to a purification treatment. The at least one water fraction is used as suspension medium in the preparation of the MFC suspension.

    A method for producing a film comprising nanocellulose
    5.
    发明专利
    A method for producing a film comprising nanocellulose 未知

    公开(公告)号：SE2050317A1

    公开(公告)日：2021-09-24

    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. The invention further relates to a film produced from said method.

    METHOD AND DEVICE FOR PRODUCING AN MFC FILM
    6.
    发明专利
    METHOD AND DEVICE FOR PRODUCING AN MFC FILM 未知

    公开(公告)号：SE2150209A1

    公开(公告)日：2022-08-27

    申请号：SE2150209

    申请日：2021-02-26

    Applicant: STORA ENSO OYJ

    Inventor： BACKFOLK KAJ ,  NYLÉN OTTO

    IPC: C08J5/18 ,  B05C1/04 ,  B05D1/00 ,  B32B29/02 ,  C09D101/02 ,  D21H11/18 ,  D21H23/32

    Abstract: A method of casting an MFC film on a substrate (52) comprises providing an MFC dispersion having a solids content of 2.5-25 % by weight, and a viscosity above 4 Pas at a shear rate of 20 s-1; exposing the MFC dispersion to a first shearing step (9), providing a shear rate of above 10 s-1; introducing the MFC dispersion into a film forming device (4), laterally distributing (41) the MFC dispersion; exposing the distributed MFC dispersion to a second shearing step (42), providing a shear rate of above 100 s-1; decelerating (43) the distributed MFC dispersion; exposing the MFC dispersion to a third shearing step (44), providing a shear rate of above 100 s-1; and simultaneously with, or subsequent to, the third shearing step (44), depositing the MFC dispersion on the substrate to form a wet MFC film on the substrate.

    A method to produce a fibrous product comprising microfibrillated cellulose
    10.
    发明专利
    A method to produce a fibrous product comprising microfibrillated cellulose 未知

    公开(公告)号：SE543616C2

    公开(公告)日：2021-04-20

    申请号：SE1950730

    申请日：2019-06-17

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  BACKFOLK KAJ ,  LYYTIKÄINEN KATJA ,  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.

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