公开(公告)号：US12258715B2

公开(公告)日：2025-03-25

申请号：US17610860

申请日：2020-05-13

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Johanna Lyytikainen

IPC: D21H19/12 ,  D21H23/48 ,  D21H23/50 ,  D21J1/08

Abstract: The invention relates to a method for applying starch to a paper or paperboard web, the method comprising the steps of: providing an aqueous suspension comprising starch particles and at least 1 wt %, based on the dry solid content of the suspension, of an amphiphilic polymer, creating a foam of the aqueous suspension, and applying the foam to the paper or paperboard web. The invention further relates to a paper or paper board product obtained by the method.

公开(公告)号：US12258711B2

公开(公告)日：2025-03-25

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 ,  D21H11/18 ,  D21H17/29 ,  D21H21/06 ,  D21H27/38

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 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：US20240376670A1

公开(公告)日：2024-11-14

申请号：US18690070

申请日：2022-08-31

Applicant: Stora Enso OYJ

Inventor： Otto Nylén ,  Isto Heiskanen ,  Jukka Kankkunen ,  Kaj Backfolk

IPC: D21H11/08 ,  D21H19/34 ,  D21H25/12

Abstract: The present invention relates to a method for producing a film comprising microfibrillated cellulose, which comprises: providing a suspension comprising 30-100 weight-% microfibrillated cellulose based on total dry weight: forming a wet web of said suspension by casting on a support being a non-porous support, paper or paperboard: wet-pressing said wet web to form a dewatered web, which comprises applying a press fabric into direct contact with said wet web and conducting said wet web, arranged between said press fabric and said non-porous support, through a pressing equipment: smoothening said dewatered web by applying at least one smoothing press to said dewatered web arranged on said non-porous support so as to form a smoothened web, wherein a pressure of 0.1-25 MPa is applied in each smoothing press, wherein said dewatered web has a dry content of 20-60% by weight when applying said smoothing press(es), and drying said smoothened web to form said film. The invention further relates to a film.

公开(公告)号：US20240229358A9

公开(公告)日：2024-07-11

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：US11952718B2

公开(公告)日：2024-04-09

申请号：US17417882

申请日：2020-01-23

Applicant: Stora Enso OYJ

Inventor： Frank Peng ,  Kaj Backfolk ,  Isto Heiskanen ,  Teija Laukala

IPC: D21H11/18 ,  D21H17/67 ,  D21H19/52 ,  D21H23/28 ,  D21H23/48 ,  D21H23/50 ,  D21H27/10 ,  D21H27/32 ,  D21H27/38 ,  D21H27/40

CPC classification number: D21H11/18 ,  D21H17/67 ,  D21H19/52 ,  D21H23/28 ,  D21H23/48 ,  D21H23/50 ,  D21H27/10 ,  D21H27/32 ,  D21H27/38 ,  D21H27/40

Abstract: The invention discloses a paperboard comprising a base ply, a top ply, and an intermediate layer disposed in-between the at least one base ply and the top ply. The intermediate layer comprises pigment and microfibrillated cellulose (MFC). The application of an intermediate layer comprising pigment and MFC in-between the base ply and the top ply gives rise to improved optical properties of the paperboard, even when using an uncoated top ply having a low grammage This makes it possible to reduce the grammage of the top ply and still obtain good optical properties.

公开(公告)号：US20240034027A1

公开(公告)日：2024-02-01

申请号：US18258274

申请日：2021-12-14

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Jukka Kankkunen ,  Anna Nyberg Zetterlund

IPC: B32B7/12 ,  B32B29/00 ,  B32B37/12 ,  B32B29/02 ,  B32B38/00 ,  B32B37/02

CPC classification number: B32B7/12 ,  B32B29/002 ,  B32B37/12 ,  B32B29/02 ,  B32B38/004 ,  B32B37/02 ,  B32B2037/1269 ,  B32B2317/12 ,  B32B2262/04 ,  B32B2260/021 ,  B32B2260/046 ,  B32B2307/718 ,  B32B2305/026 ,  B32B2307/538

Abstract: The present invention relates to packaging materials in the form of laminates comprising a paper or paperboard substrate and a barrier film. The barrier film is based on microfibrillated cellulose. The laminate comprises a paper or paperboard substrate, wherein the substrate is in contact with a first adhesive layer, which is in contact with a second adhesive layer, which is in contact with the barrier film. The present invention also relates to methods for manufacturing such laminates.

公开(公告)号：US20230416992A1

公开(公告)日：2023-12-28

申请号：US18253251

申请日：2021-11-17

Applicant: Stora Enso OYJ

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

IPC: D21H19/82 ,  D21H11/18 ,  D21H17/36 ,  D21H19/12 ,  D21H19/08 ,  D21H21/16 ,  D21H23/72 ,  D21H23/50 ,  D21H23/46 ,  D21H27/10 ,  D21H27/30 ,  B65D65/40 ,  B32B29/00

CPC classification number: D21H19/82 ,  D21H11/18 ,  D21H17/36 ,  D21H19/12 ,  D21H19/08 ,  D21H21/16 ,  D21H23/72 ,  D21H23/50 ,  D21H23/46 ,  D21H27/10 ,  D21H27/30 ,  B65D65/40 ,  B32B29/005 ,  B65D2565/387 ,  B32B2255/12 ,  B32B2255/26 ,  B32B2255/205 ,  B32B2255/28 ,  B32B2307/7244 ,  B32B2307/7246 ,  B32B2307/718 ,  B32B2553/00 ,  B32B2439/00

Abstract: The present invention relates to a barrier film for a paper or paperboard-based packaging material, said barrier film comprising: a substrate; a vacuum coating layer having a thickness in the range of 1-500 nm disposed on the substrate; and a protective coating layer comprising a crosslinked water-soluble polymer disposed on the vacuum coating layer. The present invention further relates to a paper or paperboard based packaging material and containers comprising the barrier film, and to a method for manufacturing the barrier film.

公开(公告)号：US20230313463A1

公开(公告)日：2023-10-05

申请号：US18042124

申请日：2021-08-31

Applicant: Stora Enso OYJ

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

IPC: D21H11/08 ,  D21H11/18 ,  D21H15/02 ,  D21H27/30

CPC classification number: D21H11/08 ,  D21H11/18 ,  D21H15/02 ,  D21H27/30

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising microfibrillated cellulose (MFC) in a paper-making machine, the method comprising the steps of: a) forming a bottom web layer by applying a first pulp suspension comprising at least 50% by dry weight of cellulose based fibrous material having an SR (Schopper-Riegler) value in the range of 18-75 on a bottom web wire; b) forming or applying an intermediate web layer formed from a second pulp suspension comprising at least 50% by dry weight of MFC having an SR value in the range of 80-100 on the bottom web layer; c) applying a top web layer formed from a third pulp suspension comprising at least 50% by dry weight of cellulose based fibrous material having an SR (Schopper-Riegler) value in the range of 18-75 on the intermediate web layer to form a multilayer web; and d) dewatering, and optionally drying, the formed multilayer web to obtain a multilayer film comprising MFC.

公开(公告)号：US20230243105A1

公开(公告)日：2023-08-03

申请号：US18003188

申请日：2021-06-24

Applicant: Stora Enso OYJ

Inventor： Susanne Hansson ,  Raija Bådenlid ,  Kaj Backfolk ,  Isto Heiskanen

IPC: D21H21/16 ,  D21H17/18 ,  D21H27/10 ,  D21F11/00 ,  D21H27/38

CPC classification number: D21H21/16 ,  D21H17/18 ,  D21H27/10 ,  D21F11/002 ,  D21H27/38

Abstract: The present invention relates to a water-resistant fibrous material, such as flexible sheet, paper or paperboard, comprising a foam-formed fibrous ply, wherein said foam-formed fibrous ply has been subjected to grafting with a fatty acid halide to render the foam-formed fibrous ply water-resistant. The present invention further relates to a method for manufacturing the water-resistant fibrous material.

公开(公告)号：US20230151545A1

公开(公告)日：2023-05-18

申请号：US17995446

申请日：2021-04-14

Applicant: Stora Enso OYJ

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

IPC: D21F11/04 ,  D21H19/34 ,  D21H23/24 ,  D21H23/48 ,  D21H23/50 ,  D21H27/36 ,  D21H11/18 ,  B32B5/02 ,  B32B5/26 ,  B32B7/12 ,  B32B37/12 ,  B32B3/26

CPC classification number: D21F11/04 ,  D21H19/34 ,  D21H23/24 ,  D21H23/48 ,  D21H23/50 ,  D21H27/36 ,  D21H11/18 ,  B32B5/02 ,  B32B5/26 ,  B32B7/12 ,  B32B37/1284 ,  B32B3/266 ,  B32B2255/02 ,  B32B2255/26 ,  B32B2250/40 ,  B32B2250/20 ,  B32B2262/062 ,  B32B2307/718 ,  B32B2307/412 ,  B32B2307/414 ,  B32B2307/724

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) applying a binder between the first and second partially dewatered web and 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.