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    PROCESS FOR PRODUCTION OF NANO-COATED SUBSTRATE
    121.
    发明申请
    PROCESS FOR PRODUCTION OF NANO-COATED SUBSTRATE 有权

    公开(公告)号：US20230131315A1

    公开(公告)日：2023-04-27

    申请号：US17996941

    申请日：2021-05-06

    Applicant: Stora Enso OYJ

    Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Katja Lyytikäinen

    IPC: D21H19/08 ,  D21H11/16 ,  D21H25/04 ,  B65D65/42

    Abstract: The present invention is directed to a process for manufacturing a nano-coated pulp-based substrate comprising the steps of: a) providing a suspension comprising pulp, said pulp having Schopper Riegler value of at least 70°; b) using the suspension of step a) to form a wet web; c) dewatering and/or drying the wet web to form a substrate; d) reducing surface roughness of the substrate; providing a nano-coating on the surface of the substrate obtained in step d) such that a nano-coating having a thickness in the range of from 0.1 nm to 100 nm is provided on the substrate.

    Method for forming a film comprising nanocellulose
    125.
    发明授权
    Method for forming a film comprising nanocellulose 有权

    公开(公告)号：US11518858B2

    公开(公告)日：2022-12-06

    申请号：US16345994

    申请日：2017-10-31

    Applicant: Stora Enso OYJ

    Inventor： Esa Saukkonen ,  Isto Heiskanen ,  Kaj Backfolk ,  Ville Ribu

    IPC: C08J5/18 ,  D21H11/18 ,  D21H25/04 ,  C09D101/02 ,  B32B29/02 ,  D21H19/34 ,  D21H19/22

    Abstract: A method of forming a film comprising nanocellulose having an Oxygen Transmission Rate (OTR) value in the range of 0.1 to 300 cc/m2/24 h at 38° C. and 85% relative humidity (RH), and having a basis weight in the range of in the range of 0.1 to 45 g/m2 wherein the method comprises the steps of; providing a suspension comprising nanocellulose, forming at least one layer of a web or a film from said suspension; drying said formed web or film to a dry content of at least 65 weight-%, wherein said method further comprises the steps of; treating at least one side of said dewatered and dried web or film with ultra violet (UV) or electron beam (EB) irradiation; and wherein at least one cooling step is provided in connection with or after the UV or EB treatment step.

    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE
    126.
    发明申请
    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE 有权

    公开(公告)号：US20220235201A1

    公开(公告)日：2022-07-28

    申请号：US17596530

    申请日：2020-06-15

    Applicant: Stora Enso OYJ

    Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Katja Lyytikäinen ,  Otto Nylén

    IPC: C08L1/02 ,  C08J5/18 ,  C08L33/26 ,  D21H11/18 ,  D21H17/41 ,  D21H17/66 ,  D21H17/00

    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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