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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
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
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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
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.
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13.发明授权公开(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.
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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
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.
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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.
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Patent Agency Ranking
公开(公告)号：US11346057B2
公开(公告)日：2022-05-31
申请号：US16955928
申请日：2018-12-18
Applicant: Stora Enso OYJ
Inventor： Esa Saukkonen , Isto Heiskanen , Ville Ribu
Abstract: The present invention relates to a laminate having oxygen barrier properties, which laminate comprises; a porous fiber based layer comprising nanocellulose and cellulosic fibers wherein said fiber based layer has an air resistance of less than 4000 s/100 ml measured according to ISO5636/6 and a polymer layer attached to at least one side of said fiber based layer to form said laminate. The present invention further relates to a method to produce said laminate and a paper or paperboard product comprising the laminate and the use of the laminate.
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公开(公告)号：US20210108110A1
公开(公告)日：2021-04-15
申请号：US17050196
申请日：2019-04-25
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen
Abstract: The present invention relates a method for the production of an adhesive wherein said method comprise the following steps: providing a suspension comprising starch, swelling the starch by alkali or temperature treatment or by cooking the starch suspension to form a starch suspension, providing a suspension comprising microfibrillated cellulose which suspension has a solid content above 10%-by weight, adding the suspension comprising microfibrillated cellulose to the suspension comprising starch either before or during the swelling or the cooking of the starch or to the formed starch suspension to produce the adhesive. The invention further relates to a corrugated board and an adhesive.
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公开(公告)号：US20210095424A1
公开(公告)日：2021-04-01
申请号：US16955470
申请日：2018-12-17
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen , Katja Lyytikäinen
IPC: D21H11/18 , D21H21/08 , D21H17/45 , D21H17/42 , D21H17/32 , D21H23/04 , D21F1/00 , B32B27/10 , B32B27/32
Abstract: A method for the production of a fibrous product from a fibrous web, wherein the method comprises the steps of: —providing a fibrous suspension comprising a microfibrillated cellulose, wherein the content of the microfibrillated cellulose of said suspension is in the range of 60 to 99.9 weight-% based on total dry solid content, —adding an uncharged, amphoteric or weakly cationic polymer having a molecular weight of at least 50000 g/mol to said suspension, —adding an anionic polymer having a molecular weight of at least 00000 g/mol to said suspension to provide a mixture of said microfibrillated cellulose, said uncharged, amphoteric or weakly cationic polymer and said anionic polymer, 1—providing said mixture to a substrate to form a fibrous web, wherein the amount of uncharged, amphoteric or weakly cationic polymer in said mixture is in the range of 0.1 to 20 kg/metric ton based on total dry solid content and wherein the amount of anionic polymer in said mixture is in the range of 0.01 to 10 kg/metric ton based on total dry 20 solid content; and—dewatering said fibrous web to form a fibrous product.
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公开(公告)号：US10927504B2
公开(公告)日：2021-02-23
申请号：US16312449
申请日：2017-06-20
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen
IPC: D21H15/10 , D21H27/10 , B32B27/36 , D21H27/38 , B32B7/12 , D21H11/18 , B32B27/10 , B32B27/32 , D21F1/10 , D21G1/00 , D21H17/24 , D21H17/68 , D21H19/22 , D21H19/82 , D21H21/06 , B23B29/00 , B65D81/34 , B65D65/38 , B32B29/00
Abstract: A method of producing a microfibrillated cellulose (MFC) film comprising reinforcement fibers. The method includes: providing a suspension comprising a first MFC in an amount of at least 50 weight %, reinforcement fibers in an amount of at least 5 weight %, all percentages calculated on the total solid content of said suspension, and a formation aid; mixing said suspension to form a mixture; forming a fibrous web from the mixture; and dewatering and/or drying said fibrous web to form a film having a basis weight of less than 40 g/m2, a specific formation number of below 0.45 g0.5/m2, and an Oxygen Transmission Rate (OTR) value of below 100 ml/m2/per 24 hours, preferably of below 50 ml/m2per 24 hours at 50% relative humidity. Also, a film and use of the film in food or liquid packaging applications.
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公开(公告)号：US10927503B2
公开(公告)日：2021-02-23
申请号：US16345348
申请日：2017-10-27
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen
Abstract: The invention discloses a method to enable the efficient use of surfactants in web forming of a cellulose containing material, e.g. in the making of paper or paperboard. The method comprises the addition of microfibrillated cellulose (MFC) or nanocrystalline cellulose (NCC) to the white water in a web-forming process in order to form complexes with surface active agents. The formed complexes are at least partly recycled to the process. This enables the producer to have control over the concentration of surface active agents in the system.
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