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    A PROCESS FOR PRODUCING A PACKAGING MATERIAL
    42.
    发明公开
    A PROCESS FOR PRODUCING A PACKAGING MATERIAL 审中-公开

    公开(公告)号：US20230219732A1

    公开(公告)日：2023-07-13

    申请号：US17999062

    申请日：2021-05-18

    Applicant: Stora Enso OYJ

    Inventor： Chris Bonnerup ,  Magnus Ekberg ,  Kaj Backfolk

    IPC: B65D65/42 ,  D21H19/60 ,  D21H19/22 ,  D21H25/06

    CPC classification number: B65D65/42 ,  D21H19/60 ,  D21H19/22 ,  D21H25/06

    Abstract: The invention discloses a method for producing a packaging material and a packaging material suitable for packaging of food and/or liquid. In the method of the invention a first barrier layer, and an optional second barrier layer, is applied on a first side of a paperboard web. The thereby formed barrier coated web is at least partly dried in a first drying step, whereupon an extruded layer is applied onto the partly dried barrier coated web in a second coating step. In accordance with the invention, the first and second coating steps are applied integrated within the same coating line. The application of a first barrier layer and an extrusion coated layer in the same coating line in accordance with the invention has shown to give rise to a packaging material with remarkably good barrier properties, especially gas-, liquid and/or grease barrier properties, for the packaging of food and/or liquid.

    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE
    47.
    发明申请
    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE 有权

    公开(公告)号：US20210095424A1

    公开(公告)日：2021-04-01

    申请号：US16955470

    申请日：2018-12-17

    Applicant: Stora Enso OYJ

    Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Katja Lyytikäinen

    IPC: D21H11/18 ,  D21H21/08 ,  D21H17/45 ,  D21H17/42 ,  D21H17/32 ,  D21H23/04 ,  D21F1/00 ,  B32B27/10 ,  B32B27/32

    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 a microfibrillated cellulose, wherein the content of the microfibrillated cellulose of said suspension is in the range of 60 to 99.9 weight-% based on total dry solid content, —adding an uncharged, amphoteric or weakly cationic polymer having a molecular weight of at least 50000 g/mol to said suspension, —adding an anionic polymer having a molecular weight of at least 00000 g/mol to said suspension to provide a mixture of said microfibrillated cellulose, said uncharged, amphoteric or weakly cationic polymer and said anionic polymer, 1—providing said mixture to a substrate to form a fibrous web, wherein the amount of uncharged, amphoteric or weakly cationic polymer in said mixture 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 mixture is in the range of 0.01 to 10 kg/metric ton based on total dry 20 solid content; and—dewatering said fibrous web to form a fibrous product.

    Method to form a web comprising fibers
    49.
    发明授权
    Method to form a web comprising fibers 有权

    公开(公告)号：US10927503B2

    公开(公告)日：2021-02-23

    申请号：US16345348

    申请日：2017-10-27

    Applicant: Stora Enso OYJ

    Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

    IPC: D21H11/18 ,  D21H21/06 ,  D21H23/04 ,  D21H17/03 ,  D21H17/70 ,  D21H23/02 ,  D21H17/20

    Abstract: The invention discloses a method to enable the efficient use of surfactants in web forming of a cellulose containing material, e.g. in the making of paper or paperboard. The method comprises the addition of microfibrillated cellulose (MFC) or nanocrystalline cellulose (NCC) to the white water in a web-forming process in order to form complexes with surface active agents. The formed complexes are at least partly recycled to the process. This enables the producer to have control over the concentration of surface active agents in the system.

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