公开(公告)号：US11105045B2

公开(公告)日：2021-08-31

申请号：US16337130

申请日：2017-09-27

Applicant: Stora Enso OYJ

Inventor： Riku Pihko ,  Vesa Kunnari

IPC: D21H11/18 ,  D21F5/00 ,  D21F5/18 ,  D21H19/00 ,  C08L1/02 ,  C08J5/18 ,  C08B15/02

Abstract: The present invention relates to a method for the production of a film comprising microfibrillated cellulose, wherein the method comprises the steps of; providing a suspension comprising between 70 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension, drying the web in a drying equipment wherein the web is at least partly dried at a drying rate above 75 kg(H2O)/m2/h by use of hot air whereby a film is formed. The invention also relates to a film produce according to the method and a paper or paperboard substrate comprising said film.

公开(公告)号：US11619004B2

公开(公告)日：2023-04-04

申请号：US17292191

申请日：2019-11-08

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Jukka Kankkunen ,  Riku Pihko ,  Vesa Kunnari

IPC: D21F3/08 ,  D21F3/04 ,  D21F7/12 ,  D21H11/18

Abstract: The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry content of 1-25% by weight, applying a dewatering felt into direct contact with the fibrous web, conducting said fibrous web, arranged between said dewatering felt and said substrate, through a pressing equipment. The invention further relates to a film produced from said method.

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：US20210324580A1

公开(公告)日：2021-10-21

申请号：US17292191

申请日：2019-11-08

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Jukka Kankkunen ,  Riku Pihko ,  Vesa Kunnari

IPC: D21F3/08 ,  D21H11/18 ,  D21F7/12 ,  D21F3/04

Abstract: The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry content of 1-25% by weight, applying a dewatering felt into direct contact with the fibrous web, conducting said fibrous web, arranged between said dewatering felt and said substrate, through a pressing equipment. The invention further relates to a film produced from said method.

公开(公告)号：US20190226146A1

公开(公告)日：2019-07-25

申请号：US16337130

申请日：2017-09-27

Applicant: Stora Enso OYJ

Inventor： Riku Pihko ,  Vesa Kunnari

IPC: D21H11/18 ,  D21F5/18 ,  D21F5/00 ,  C08J5/18

Abstract: The present invention relates to a method for the production of a film comprising microfibrillated cellulose, wherein the method comprises the steps of; providing a suspension comprising between 70 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension, drying the web in a drying equipment wherein the web is at least partly dried at a drying rate above 75 kg(H2O)/m2/h by use of hot air whereby a film is formed. The invention also relates to a film produce according to the method and a paper or paperboard substrate comprising said film.

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).