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：US20230219732A1

公开(公告)日：2023-07-13

申请号：US17999062

申请日：2021-05-18

Applicant: Stora Enso OYJ

Inventor： Chris Bonnerup ,  Magnus Ekberg ,  Kaj Backfolk

IPC: B65D65/42 ,  D21H19/60 ,  D21H19/22 ,  D21H25/06

CPC classification number: B65D65/42 ,  D21H19/60 ,  D21H19/22 ,  D21H25/06

Abstract: The invention discloses a method for producing a packaging material and a packaging material suitable for packaging of food and/or liquid. In the method of the invention a first barrier layer, and an optional second barrier layer, is applied on a first side of a paperboard web. The thereby formed barrier coated web is at least partly dried in a first drying step, whereupon an extruded layer is applied onto the partly dried barrier coated web in a second coating step. In accordance with the invention, the first and second coating steps are applied integrated within the same coating line. The application of a first barrier layer and an extrusion coated layer in the same coating line in accordance with the invention has shown to give rise to a packaging material with remarkably good barrier properties, especially gas-, liquid and/or grease barrier properties, for the packaging of food and/or liquid.

公开(公告)号：US11643259B2

公开(公告)日：2023-05-09

申请号：US16762681

申请日：2018-11-08

Applicant: Stora Enso OYJ

Inventor： Ville Ribu ,  Paula Hirsilä ,  Kaj Backfolk

IPC: B65D65/40 ,  B32B27/08 ,  B32B27/10 ,  B32B27/30 ,  B32B27/32 ,  B32B27/34 ,  C08L23/06

CPC classification number: B65D65/40 ,  B32B27/08 ,  B32B27/10 ,  B32B27/306 ,  B32B27/308 ,  B32B27/32 ,  B32B27/34 ,  C08L23/06 ,  B32B2250/05 ,  B32B2307/31 ,  B32B2307/718 ,  B32B2307/7244 ,  B32B2307/7246 ,  B32B2553/00

Abstract: The present invention is directed to a packaging material, more specifically a packaging material having gas and/or moisture barrier properties, wherein the material comprises a barrier material comprising a layer comprising at least 50% of a zinc ionomer, a layer of polyethylene and a layer that forms a gas barrier. The invention is also directed to packaging products using said barrier material. Such products are in particular packages suitable for cosmetics and personal care products.

公开(公告)号：US11479917B2

公开(公告)日：2022-10-25

申请号：US15125616

申请日：2015-03-13

Applicant: Stora Enso OYJ

Inventor： Nina Miikki ,  Petri Sirvió ,  Kaj Backfolk

IPC: D21H27/10 ,  B32B27/10 ,  B32B27/36 ,  D21H19/10 ,  B32B7/12 ,  D21H21/18 ,  D21H19/82 ,  D21H19/52 ,  D21H19/84 ,  B41M5/00 ,  B41M7/00 ,  B41M5/52 ,  B65D65/40 ,  B32B27/32 ,  D21H19/14 ,  D21H19/34 ,  D21H23/70

Abstract: The invention refers to a method to produce a packaging material comprising the steps of; treating at least one surface of a paperboard substrate with a binder and with a metal salt, printing at least a part of said treated surface with ink, and applying at least one polymer layer on said printed surface. The packaging material produced in accordance with the invention shows good printability and simultaneously good adhesion of the applied polymer layer.

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.

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

IPC: C09J103/02 ,  C09J11/08 ,  D21J1/10 ,  B32B29/08 ,  B32B29/00 ,  B32B7/12

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.

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.

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.