公开(公告)号：US20250043512A1

公开(公告)日：2025-02-06

申请号：US18705099

申请日：2022-10-25

Applicant: Stora Enso OYJ

Inventor： Carl-Henrik Ljungqvist ,  Isto Heiskanen ,  Kaj Backfolk

IPC: D21H11/14 ,  D21B1/02 ,  D21C1/06 ,  D21C5/00

Abstract: The present invention relates to a method for manufacturing a highly refined cellulose composition, comprising: i) providing a fiber fraction comprising 20-100 wt % fibers obtained from used beverage cartons (UBC) based on the total dry fiber weight of the fiber fraction, ii) optionally subjecting the fiber fraction to mechanical, chemical or enzymatic pre-treatment, or a combination thereof, iii) subjecting the optionally pre-treated fiber fraction to refining at a consistency in the range of 0.5-30% by weight to a Schopper-Riegler (SR) in the range of 50-100, as determined by standard ISO 5267-1, to obtain the highly refined cellulose composition.

公开(公告)号：US12152115B2

公开(公告)日：2024-11-26

申请号：US17756985

申请日：2020-12-22

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Nina Miikki

IPC: C08J5/18 ,  B32B3/30 ,  B32B5/02 ,  B32B23/08 ,  B32B37/14 ,  B32B37/20 ,  B32B38/18 ,  C08J7/048 ,  D21H11/18 ,  D21H19/34

Abstract: A textured film is provided which comprises nanocellulose. At least a first surface of the film comprises a patterned, textured surface formed by repeating protruding regions and at least one non-protruding region arranged between said protruding regions. A particular height difference between the protruding and non-protruding regions can give liquid repellent properties. Methods for making the textured film are also provided.

公开(公告)号：US12006633B2

公开(公告)日：2024-06-11

申请号：US17757257

申请日：2020-12-22

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Otto Nylén

IPC: D21H23/24 ,  D06B1/10 ,  D06M13/02 ,  D06M13/10 ,  D06M13/188 ,  D06M15/17 ,  D06M15/227 ,  D06M101/06 ,  D21F11/00 ,  D21H19/16 ,  D21H19/28 ,  D21H19/66 ,  D21H27/02

CPC classification number: D21H23/24 ,  D06B1/10 ,  D06M13/02 ,  D06M13/10 ,  D06M13/188 ,  D06M15/17 ,  D06M15/227 ,  D21F11/006 ,  D21H19/16 ,  D21H19/28 ,  D21H19/66 ,  D21H27/02 ,  D06M2101/06

Abstract: A method is provided for coating a fibrous web, in particular a fibrous web comprising nanocellulose fibres. The method includes steps of applying a coating agent to a textured surface region of a textured substrate, applying a fibre furnish or a wet fibrous web onto the coated textured surface region of the textured substrate, optionally dewatering to provide a wet fibrous web, and drying said wet fibrous web such that at least a portion of said coating agent is transferred to said fibrous web. The method provides a coated fibrous web with improved barrier properties.

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：US20240133118A1

公开(公告)日：2024-04-25

申请号：US18548368

申请日：2022-03-08

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Katja Lyytikäinen ,  Anders Moberg ,  Jukka Kankkunen

IPC: D21H11/18 ,  D21F1/80 ,  D21F9/00 ,  D21H23/28 ,  D21H23/48 ,  D21H27/30

CPC classification number: D21H11/18 ,  D21F1/80 ,  D21F9/003 ,  D21H23/28 ,  D21H23/48 ,  D21H27/30

Abstract: The present invention relates to a method for manufacturing a barrier film comprising highly refined cellulose, said method comprising: a) providing a highly refined cellulose pulp suspension comprising highly refined cellulose pulp having a Schopper-Riegler (SR) number in the range of 40-98 as determined by standard ISO 5267-1 and a content of fibers having a length >0.2 mm of at least 7 million fibers per gram based on dry weight, at a consistency in the range of 0.1-1.5 wt %; b) forming a web of the highly refined cellulose pulp suspension and dewatering the web in a paper machine former on a wire to a consistency of at least 5 wt % to obtain a substrate web, wherein the white water removed from the pulp contains 2-25 wt %, preferably 5-20 wt % and more preferably at least 5-15 wt % of the solids of the highly refined cellulose pulp suspension provided in step a); c) optionally further dewatering and optionally drying the substrate web; d) coating the optionally further dewatered and optionally dried substrate web with a coating suspension comprising cellulose fines or microfibrillated cellulose to obtain a coated web; and e) dewatering and/or drying the coated web to obtain a barrier film comprising highly refined cellulose.

公开(公告)号：US11834793B2

公开(公告)日：2023-12-05

申请号：US16966527

申请日：2019-01-31

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Jukka Kankkunen ,  Anna Nyberg Zetterlund ,  Jan Lif

IPC: D21H23/28 ,  D21H11/08 ,  D21H23/48 ,  D21H23/50 ,  D21H23/52 ,  D21H19/40 ,  D21H19/66 ,  D21H11/18

CPC classification number: D21H23/28 ,  D21H11/18 ,  D21H19/40 ,  D21H19/66 ,  D21H23/48 ,  D21H23/50 ,  D21H23/52

Abstract: The present invention relates to a process for manufacturing a film comprising high amounts of microfibrillated cellulose (MFC), having haptic properties. According to the present invention, a wet web comprising MFC is formed, followed by addition of particles having an average diameter of at least 1 μm to the wet web, followed by dewatering and/or drying. The wet web may be formed for example by wet laid or cast forming methods. The particles may be added to the wet web for example by cast coating or spraying.

公开(公告)号：US20230151553A1

公开(公告)日：2023-05-18

申请号：US17995448

申请日：2021-04-14

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Katja Lyytikäinen

IPC: D21H27/38 ,  D21F11/04 ,  D21H11/18 ,  D21H11/04 ,  D21H17/23 ,  B32B5/02 ,  B32B5/26

CPC classification number: D21H27/38 ,  D21F11/04 ,  D21H11/18 ,  D21H11/04 ,  D21H17/23 ,  B32B5/02 ,  B32B5/26 ,  B32B2262/062 ,  B32B2307/718 ,  B32B2307/724 ,  B32B2250/20

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising highly refined cellulose fibers, the method comprising the steps of: a) forming a first wet web by applying a first pulp suspension comprising highly refined cellulose fibers on a first wire; b) partially dewatering the first wet web to obtain a first partially dewatered web; c) forming a second wet web by applying a second pulp suspension comprising highly refined cellulose fibers on a second wire; d) partially dewatering the second wet web to obtain a second partially dewatered web; e) joining the first and second partially dewatered web to obtain a multilayer web; and f) further dewatering, and optionally drying, the multilayer web to obtain a multilayer film comprising highly refined cellulose fibers; wherein at least one of said first and second pulp suspension comprises lignin at a concentration in the range of 0.1-50 wt %, based on the total dry weight of the pulp suspension.

公开(公告)号：US20230135217A1

公开(公告)日：2023-05-04

申请号：US17995447

申请日：2021-04-14

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Katja Lyytikäinen ,  Jukka Kankkunen ,  Anna Kauppi

IPC: D21F9/00 ,  D21F11/00 ,  D21H17/29 ,  D21H21/06 ,  D21H27/38 ,  D21H11/18

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising highly refined cellulose fibers, the method comprising the steps of: a) forming a first wet web by applying a first pulp suspension comprising highly refined cellulose fibers on a first wire; b) partially dewatering the first wet web to obtain a first partially dewatered web; c) forming a second wet web y applying a foamed second pulp suspension comprising highly refined cellulose fibers and a foaming agent on a second wire; d) partially dewatering the foamed second wet web to obtain a second partially dewatered web; e) joining the first and second partially dewatered web to obtain a multilayer web; and f) further dewatering, and optionally drying, the multilayer web to obtain a multilayer film comprising highly refined cellulose fibers.

公开(公告)号：US20230131438A1

公开(公告)日：2023-04-27

申请号：US17996940

申请日：2021-05-06

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Katja Lyytikäinen

IPC: D21H19/34 ,  D21H27/10 ,  D21H23/56 ,  D21H23/54

Abstract: The present invention is directed to a coated paper substrate that is particularly suitable for metallization and other nano-coatings that provide barrier properties and are applied using vacuum deposition techniques. The invention is also directed to a process for preparing the coated paper substrate. The invention is also directed to a packaging material comprising the coated paper substrate.

公开(公告)号：US20230016725A1

公开(公告)日：2023-01-19

申请号：US17756983

申请日：2020-12-15

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen

IPC: C08J9/35 ,  C08L1/02 ,  B82Y30/00 ,  C08J9/00

Abstract: The present invention relates to a foam formed solid composite, comprising: a matrix phase consisting of a mixture of nanocellulose, at least one foaming agent, and optional additives, and a dispersed phase consisting of solid low-density particles having a density of less than 1.2 kg/dm3. The present invention further relates to a method and a liquid foam composition for manufacturing the solid composite.