公开(公告)号：US20240141589A1

公开(公告)日：2024-05-02

申请号：US18547375

申请日：2022-02-23

Applicant: Stora Enso OYJ

Inventor： Otto Nylèn ,  Kaj Backfolk

IPC: D21F1/02 ,  B05C5/02 ,  D21H11/16

CPC classification number: D21F1/026 ,  B05C5/0254 ,  D21F1/028 ,  D21H11/16

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.

公开(公告)号：US20240226947A9

公开(公告)日：2024-07-11

申请号：US18547374

申请日：2022-02-23

Applicant: Stora Enso OYJ

Inventor： Otto Nylèn ,  Riku Pihko ,  Vesa Kunnari ,  Marko Kraft

IPC: B05C3/18 ,  B05C1/08 ,  B05C9/10 ,  D21H23/40

CPC classification number: B05C3/18 ,  B05C1/0826 ,  B05C1/0865 ,  B05C9/10 ,  D21H5/0015

Abstract: A device (4) for applying a viscous liquid, in particular an MFC dispersion, onto a moving substrate (52) comprises an inlet (72, 73a-73f) for the viscous liquid, a casting chamber (61a, 61b), a lower portion of which being open to the substrate (52), and a metering portion (69, 661), for limiting a thickness of a wet film that is formed on the substrate downstream of the device. The device further comprises a shear section (42) arranged inside the casting chamber (61a, 61b). The shear section (42) comprises a fluidization rod (68), arranged in the casting chamber (61a, 61b), for providing shearing of the viscous liquid inside the casting chamber (61a, 61b).

公开(公告)号：US20240131549A1

公开(公告)日：2024-04-25

申请号：US18547374

申请日：2022-02-23

Applicant: Stora Enso OYJ

Inventor： Otto Nylèn ,  Riku Pihko ,  Vesa Kunnari ,  Marko Kraft

IPC: B05C3/18 ,  B05C1/08 ,  B05C9/10 ,  D21H23/40

CPC classification number: B05C3/18 ,  B05C1/0826 ,  B05C1/0865 ,  B05C9/10 ,  D21H5/0015

Abstract: A device (4) for applying a viscous liquid, in particular an MFC dispersion, onto a moving substrate (52) comprises an inlet (72, 73a-73f) for the viscous liquid, a casting chamber (61a, 61b), a lower portion of which being open to the substrate (52), and a metering portion (69, 661), for limiting a thickness of a wet film that is formed on the substrate downstream of the device. The device further comprises a shear section (42) arranged inside the casting chamber (61a, 61b). The shear section (42) comprises a fluidization rod (68), arranged in the casting chamber (61a, 61b), for providing shearing of the viscous liquid inside the casting chamber (61a, 61b).