公开(公告)号：US20250059712A1

公开(公告)日：2025-02-20

申请号：US18717641

申请日：2022-12-12

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Anders Moberg ,  Katja Lyytikäinen ,  Cecilia Land Hensdal ,  Anna Kauppi

IPC: D21H21/18 ,  D21D1/20 ,  D21H11/02 ,  D21H11/18 ,  D21H15/06

Abstract: The present invention relates to a strength enhancement agent for paper and paperboard, said strength enhancement agent comprising a fines-depleted highly refined cellulose pulp (FD-HIRC), wherein said FD-HIRC has a Schopper-Riegler (SR) number in the range of 60-100 as determined by standard ISO 5267-1, and wherein said FD-HRC has an amount of long (>0.2 mm) fibers of at least 8 million fibers per gram (based on dry weight), and wherein said FD-HRC has a Fines A value below 46, wherein the Fines A value is determined using an FS5 optical fiber analyzer. The present invention relates to a method for manufacturing said strength enhancement agent.

公开(公告)号：US12152345B2

公开(公告)日：2024-11-26

申请号：US17046410

申请日：2019-04-12

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Jukka Kankkunen ,  Antti Veitola

IPC: D21H19/12 ,  B32B27/10 ,  B32B29/06 ,  B32B37/15 ,  B32B37/20 ,  D21G1/00 ,  D21H11/18 ,  D21H19/84 ,  D21H23/56 ,  D21H23/64

Abstract: The present invention relates to a method for the production of a coated paper, paperboard or film, wherein the method comprises the steps of; providing a first suspension comprising cellulose fibers and/or nanocellulose, applying the first suspension on a substrate to form a fibrous web, wherein the web has a first and a second side, providing a second suspension comprising polymers and/or particles wherein the second suspension has a Brookfield viscosity above 3000 m Pas at a dry content between 4%-40% by weight, providing at least one calender comprising at least one roll or belt, applying the second suspension to the surface of the at least one calender roll or belt forming a coating web and conducting said fibrous web through the at least one calender whereby the coating web is applied to the first side of the web forming the coated paper, paperboard or film. The invention also relates to a paper, paperboard or film produced according to the method.

公开(公告)号：US20240263399A1

公开(公告)日：2024-08-08

申请号：US18566361

申请日：2022-06-03

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Katja Lyytikäinen

IPC: D21H21/16 ,  B32B29/00 ,  B65D65/40 ,  D21H11/18 ,  D21H19/12 ,  D21H19/40 ,  D21H19/46 ,  D21H19/54 ,  D21H23/22 ,  D21H27/10

CPC classification number: D21H21/16 ,  B32B29/005 ,  B65D65/40 ,  D21H11/18 ,  D21H19/12 ,  D21H19/40 ,  D21H19/46 ,  D21H19/54 ,  D21H23/22 ,  D21H27/10 ,  B32B2255/12 ,  B32B2255/24 ,  B32B2307/718 ,  B32B2307/7244 ,  B32B2307/7246

Abstract: The present invention relates to a biobased barrier film for a paper or paperboard-based packaging material, said barrier film comprising: a substrate layer and a coating layer disposed on at least one surface of the substrate layer, wherein said substrate layer has a grammage in the range of 1-60 g/m2 and comprises at least 50 wt % of highly refined cellulose pulp based on the dry weight of the substrate layer, and wherein said coating layer has a grammage in the range of 1-15 g/m2 and comprises at least 50 wt % of a film forming modified starch and 0.1-10 wt % of a biobased lubricant, based on the dry weight of the coating layer.

公开(公告)号：US20240254694A1

公开(公告)日：2024-08-01

申请号：US18561431

申请日：2022-05-13

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Jukka Kankkunen ,  Ismo Saarinen ,  Jukka Lyyra ,  Juha Rvenniemi ,  Harri Taipale ,  Hannu Heikkinen

IPC: D21F11/12 ,  D21H11/14 ,  D21H27/40

CPC classification number: D21F11/12 ,  D21H11/14 ,  D21H27/40

Abstract: A method for manufacturing fluting and/or liner for corrugated board, comprising the step(s): a) using broke obtained from manufacturing of liner in the pulp used for manufacturing of fluting wherein at least 50% of the broke is external broke from the manufacturing of liner, and/or b) using broke obtained from manufacturing of fluting in the pulp used for manufacturing of liner wherein at least 50% of the broke is external broke from the manufacturing of fluting.

公开(公告)号：US20240240403A1

公开(公告)日：2024-07-18

申请号：US18559419

申请日：2022-05-13

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Jukka Kankkunen ,  Tuomo Sippus

IPC: D21H11/06 ,  D21C9/02 ,  D21H17/20 ,  D21H21/10 ,  D21H21/16 ,  D21H27/40

CPC classification number: D21H11/06 ,  D21C9/02 ,  D21H17/20 ,  D21H21/10 ,  D21H21/16 ,  D21H27/40

Abstract: The present invention relates to a fluting or liner for corrugated board comprising a neutral sulfite semi chemical (NSSC) pulp, wherein said NSSC pulp has an ash content of less than 1.8 wt %, as determined according to standard ISO 1762:2019. The invention further relates to a corrugated board comprising the fluting and/or liner.

公开(公告)号：US20240209573A1

公开(公告)日：2024-06-27

申请号：US18555326

申请日：2022-04-13

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Katja Lyytikäinen ,  Isto Heiskanen ,  Tommi Nordström ,  Anna Kauppi

IPC: D21H19/12 ,  B29C43/24 ,  B29K1/00 ,  D21H11/18 ,  D21H19/72 ,  D21H25/06

CPC classification number: D21H19/12 ,  B29C43/24 ,  D21H11/18 ,  D21H19/72 ,  D21H25/06 ,  B29K2001/00 ,  B29K2995/0063

Abstract: The present invention relates to a process for manufacturing a barrier film, wherein the method comprises:— providing an aqueous suspension comprising at least 70 weight-% highly refined cellulose pulp having an SR value of 70-95 and having a content of fibers having a length >0.2 mm of at least 10 million fibers per gram based on dry weight:— forming a wet web:— dewatering and/or drying to form a substrate:— calendering said substrate in at least one soft calender nip:— providing said substrate with at least one first layer of a barrier chemical to form a coated substrate, wherein each first layer has a coat weight of 0.5-5 gsm, and wherein a total coat weight on of the first layers is ≤8 gsm, and— drying to form said barrier film having a thickness of

公开(公告)号：US20230349099A1

公开(公告)日：2023-11-02

申请号：US17998235

申请日：2021-05-10

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk

IPC: D21F1/80 ,  D21F11/02 ,  D21H11/18

CPC classification number: D21F1/80 ,  D21F11/02 ,  D21H11/18

Abstract: The present invention relates to a method for manufacturing a web or film comprising highly refined cellulose fibers in a paper machine, the method comprising the steps of: a) forming a wet web by applying an aqueous pulp suspension comprising highly refined cellulose fibers on a wire; and b) dewatering the wet web on the wire to obtain a dewatered web comprising highly refined cellulose fibers, wherein the dewatering comprises membrane assisted dewatering using a gas permeable membrane temporarily applied to the wet web, wherein the gas permeable membrane has a lower air permeability than the wire.

公开(公告)号：US11795280B2

公开(公告)日：2023-10-24

申请号：US16757093

申请日：2018-10-17

Applicant: Stora Enso OYJ

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

IPC: C08J5/18 ,  C12N9/42 ,  C12N9/24 ,  D21H11/18 ,  D21H11/20 ,  D21H17/00 ,  D21H17/05 ,  D21H19/34 ,  D21H19/52

CPC classification number: C08J5/18 ,  C12N9/248 ,  C12N9/2437 ,  D21H11/18 ,  D21H11/20 ,  D21H17/005 ,  D21H17/05 ,  D21H19/34 ,  D21H19/52

Abstract: The present invention relates to a method for manufacturing a film comprising microfibrillated cellulose wherein the method comprises the steps of; providing a suspension comprising a microfibrillated cellulose, adding an enzyme to the suspension, mixing the enzyme with the suspension to form a mixture, applying said mixture to a wire to form a fibrous web and drying said web to form said film. The present invention further relates to a film comprising microfibrillated cellulose having good barrier properties.

公开(公告)号：US20230220629A1

公开(公告)日：2023-07-13

申请号：US17999221

申请日：2021-05-19

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Katja Lyytikäinen ,  Kaj Backfolk

IPC: D21H21/56 ,  D21H19/20 ,  D21H17/36 ,  D21H11/18

CPC classification number: D21H21/56 ,  D21H19/20 ,  D21H17/36 ,  D21H11/18

Abstract: The present invention relates to a method for manufacturing a polymer coated cellulose based substrate useful as a barrier film, said method comprising the steps of: a) providing a cellulose based substrate comprising 50-99 wt % highly refined cellulose fibers based on the total dry weight of the cellulose based substrate; b) preparing an aqueous foam from an aqueous solution of a foam forming polymer; c) applying the aqueous foam to at least one surface of the cellulose based substrate; and d) collapsing the aqueous foam to form a polymer coating on the cellulose based substrate.

公开(公告)号：US11458714B2

公开(公告)日：2022-10-04

申请号：US16955900

申请日：2018-12-19

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Jukka Kankkunen

IPC: B32B27/32 ,  B29C65/32 ,  B29C65/36 ,  B32B27/12 ,  D21H11/18 ,  D21H19/22 ,  D21H19/80 ,  D21H27/10 ,  B29C65/00

Abstract: The present invention is directed to a packaging material free from aluminium in the form of a continuous foil or film, comprising a layer of microfibrillated cellulose (MFC), wherein the layer comprising MFC has been laminated or coated on at least one side with a heat-sealable material. The MFC layer contains at least 60% by weight of microfibrillated cellulose. The present invention is also directed to a method for induction sealing, wherein a packaging material to be heat-sealed by induction is placed against an induction heating surface.