公开(公告)号：US20190047273A1

公开(公告)日：2019-02-14

申请号：US16087281

申请日：2017-03-21

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Seppo Lampainen ,  Jukka Kankkunen

IPC: B32B29/08 ,  D21H11/18 ,  D21H17/16 ,  D21H17/17 ,  D21H17/25 ,  D21H21/16 ,  D21H21/18 ,  D21H27/10 ,  D21H27/38 ,  D21H27/40

Abstract: A corrugated fiberboard comprising cellulosic fibers, wherein said corrugated fiberboard has at least one of a geometrical tensile index in the range of from 32 to 65 Nm/g, a fracture toughness index in the range of from 4 to 24 Jm/kg, and a ring crush index in the range of from 5 to 10 Nm/g5 measured at relative humidity of 85% RH; wherein the cellulosic fibers comprises a mixture of less refined fibers having a Schopper-Riegler (SR) value in the range of 15 to 28 and microfibrillated cellulose fibers, wherein mixture comprises said microfibrillated cellulose in a range of from 1% to 5% by weight of the dry content of the cellulosic fibers.

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：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：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.

公开(公告)号：US20200171796A1

公开(公告)日：2020-06-04

申请号：US16500033

申请日：2018-03-28

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Jukka Kankkunen ,  Ville Ribu ,  Kimmo Nevalainen

IPC: B32B15/085 ,  B65D65/40 ,  B65D65/42 ,  B32B15/20 ,  B32B27/10 ,  D21H27/10 ,  D21H19/04 ,  D21H19/22 ,  D21H19/84 ,  D21H19/82 ,  D21H11/18 ,  C08J5/18

Abstract: The present invention is directed to a packaging material comprising a layer of microfibrillated cellulose (MFC) and an aluminum layer having a thickness of 0.1-20 μm, wherein the layer comprising MFC and/or the aluminum layer has been laminated or extrusion coated on at least one side with a thermoplastic polymer and wherein the amount of aluminum is sufficient to make the packaging material heat sealable by induction. The MFC layer contains at least 60% by weight of microfibrillated cellulose.

公开(公告)号：US10240288B2

公开(公告)日：2019-03-26

申请号：US14758708

申请日：2013-12-30

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Henri Kastinen ,  Anna Kauppi ,  Jukka Kankkunen ,  Lars Axrup ,  Cecilia Land Hensdal ,  Heidi Saxell ,  Kaj Backfolk

IPC: D21C9/00 ,  D21H11/18 ,  D21H17/00 ,  D21H11/04 ,  C08B15/08 ,  C08L1/04 ,  D21D1/20

Abstract: The invention relates to methods of producing microfibrillated cellulose (MFC). According to the invention a fibrous pulp suspension is fibrillated mechanically at a consistency of less than 12.5%, dewatered to raise the consistency of the fibrillated suspension to at least 12.5%, and then subjected in the dewatered condition to further fibrillation. Alternatively an initially fibrillated fibrous pulp suspension may be dewatered and fibrillated in the dewatered condition, after which these dewatering and fibrillating steps are repeated one or more times so that pulp consistency is increased for each fibrillation step. The goals of raising the consistency between subsequent fibrillations are energy saving and an increased aspect ratio in MFC. The invention even comprises uses of the MFC product, e.g. as an additive for papermaking furnish or injection molded plastic composites.