公开(公告)号：US20250059710A1

公开(公告)日：2025-02-20

申请号：US18717642

申请日：2022-12-12

Applicant: Stora Enso OYJ

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

IPC: D21H11/18 ,  B32B29/00 ,  B65D65/40 ,  D21H27/10

Abstract: The present invention relates to a cellulose-based gas barrier film, said cellulose-based gas barrier film comprising at least 50 wt % of a fines-depleted highly refined cellulose pulp (FD-HRC), wherein said FD-HRC has a Schopper-Riegler (SR) number in the range of 80-100 as determined by standard ISO 5267-1, wherein said FD-HIRC 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 cellulose-based gas barrier film.

公开(公告)号：US20240192115A1

公开(公告)日：2024-06-13

申请号：US18552270

申请日：2022-03-25

Applicant: Stora Enso OYJ

Inventor： Robertas Maldzius ,  Jonas Sidaravicius ,  Tadeus Lozovski ,  Kaj Backfolk ,  Isto Heiskanen

IPC: G01N15/08

CPC classification number: G01N15/082

Abstract: The present invention relates to an arrangement for determining the permeability of a sample, said arrangement comprising a source of fluid medium arranged such that at least a fraction of said medium can be brought into contact with a first surface of said sample to be tested; means for measuring the electrical properties at a second surface of said sample, wherein the second surface is opposite said first surface of said sample; and a controller for recording said electrical properties, and for determining the transmission rate of the fluid medium through the sample based on the recorded electrical properties.

公开(公告)号：US20240141588A1

公开(公告)日：2024-05-02

申请号：US18548367

申请日：2022-03-08

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Jukka Kankkunen ,  Anna Kauppi

IPC: D21C9/18 ,  D21C11/00

CPC classification number: D21C9/18 ,  D21C11/0042

Abstract: The present invention relates to a method for fractionation of a highly refined cellulose pulp into a fine fraction and coarse fraction, 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; b) subjecting the highly refined cellulose pulp suspension to dewatering in a belt filter; c) collecting the dewatered retentate as the coarse fraction; and d) collecting the filtrate as the fine fraction; wherein the collected fine fraction contains 2-50 wt % of the solids of the highly refined cellulose pulp suspension provided in step a).

公开(公告)号：US20230313464A1

公开(公告)日：2023-10-05

申请号：US18042120

申请日：2021-08-31

Applicant: Stora Enso OYJ

Inventor： Anna Kauppi ,  Isto Heiskanen ,  Kaj Backfolk ,  Jukka Kankkunen ,  Mikael Hjerpe ,  Juha Korvenniemi

IPC: D21H11/18 ,  D21F1/02 ,  D21H27/30 ,  D21F1/74 ,  D21F1/20 ,  D21F1/10 ,  D21F11/02

CPC classification number: D21H11/18 ,  D21F1/02 ,  D21H27/30 ,  D21F1/74 ,  D21F1/20 ,  D21F1/10 ,  D21F11/02

Abstract: The present invention relates to a method for manufacturing a film comprising highly refined cellulose fibers in a paper-making machine, the method comprising the steps of: a) providing an aqueous pulp suspension comprising at least 20% by dry weight of highly refined cellulose fibers having an SR (Schopper-Riegier) value in the range of 80-100 at a consistency in the range of 0.8-3 wt % and; b) deflocculating and diluting the aqueous pulp suspension to a lower consistency in the range of 0.1-1.5 wt % by injecting the aqueous pulp suspension into an aqueous stream using a high shear mixer to obtain a diluted aqueous pulp suspension; and c) feeding the diluted aqueous pulp suspension to a headbox of the paper-making machine.

公开(公告)号：US11643776B2

公开(公告)日：2023-05-09

申请号：US16977159

申请日：2019-02-18

Applicant: Stora Enso OYJ

Inventor： Philip Håkansson ,  Kaj Backfolk ,  Isto Heiskanen

IPC: D21C9/00 ,  C08B15/08 ,  D21H11/18 ,  C04B16/02

CPC classification number: D21C9/004 ,  C04B16/02 ,  C08B15/08 ,  D21H11/18

Abstract: The invention discloses a method to form a composition, which method includes fibrillating fibers to form MFC in the presence of an alkali-metal silicate whereby an MFC and silicate mixture is formed The presence of alkali-metal silicate during fibrillation of fibers to MFC, reduces the viscosity and increases the water release behavior, whereby the fibrillation can be accomplished at higher concentrations and a more uniform mixture of MFC-silicate is accomplished. The composition formed by the method of the invention may e.g. be used in paper or paperboard production, in cement production or as an additive in composites.

公开(公告)号：US11578463B2

公开(公告)日：2023-02-14

申请号：US16628565

申请日：2018-07-02

Applicant: Stora Enso Oyj ,  Wetend Technologies Oy

Inventor： Esa Saukkonen ,  Isto Heiskanen ,  Kaj Backfolk ,  Jouni Matula ,  Jussi Matula

IPC: D21H23/14 ,  D21H11/18 ,  D21H23/20 ,  D21C9/00

Abstract: A method of dosing a nanocellulose suspension in gel phase into a second suspension, wherein the method comprises the steps of: providing said nanocellulose suspension in gel phase; providing said second suspension; bringing said nanocellulose suspension in gel phase in contact with said second suspension; wherein the method comprises a step of subjecting said nanocellulose suspension in gel phase to a shear rate of more than 500 l/s, simultaneously with and/or immediately prior to the step of bringing said nanocellulose suspension in gel phase and said second suspension in contact with each other.

公开(公告)号：US20230019391A1

公开(公告)日：2023-01-19

申请号：US17757602

申请日：2020-12-11

Applicant: Stora Enso OYJ

Inventor： Seppo Lampainen ,  Janne Myllykangas ,  Petri Paakkanen ,  Atso Laakso ,  Kaj Backfolk

IPC: D21F11/12 ,  D21F1/02 ,  D21F11/04 ,  D21F3/02 ,  B32B29/00 ,  B32B29/08 ,  B32B3/28 ,  B32B7/12

Abstract: The invention relates to a method to produce a linerboard exhibiting a high bending resistance and a high compression strength, which in turn provides high resistance to interflute buckling and sagging in a thereof formed corrugated board. This is achieved by the inventive combination of an optimized fiber refining level of the furnish in each layer of the linerboard, the separate formation of the top layer and the use of a multi-layer headbox to form the two-layered ply. In addition, the linerboard made according to the invention provides good printing properties in a thereof produced corrugated board, especially in flexographic printing, without the fluting structure being negatively affected.

公开(公告)号：US20230009598A1

公开(公告)日：2023-01-12

申请号：US17756984

申请日：2020-12-18

Applicant: Stora Enso OYJ

Inventor： Otto Nylén ,  Kaj Backfolk

IPC: D21F7/06 ,  D21G9/00 ,  D21H11/18 ,  D21F2/00 ,  D21F5/00 ,  G06T7/00 ,  G06T7/60 ,  G06T7/70 ,  G01N21/86 ,  G01N21/89

Abstract: A method of identifying a defect in a wet film comprises conveying said wet film (20), in a wet state, on a conveyor (10), providing a laser projection (1511) onto the wet film, acquiring a series of images, each depicting an area of the wet film, wherein at least a portion of the laser projection is visible, and using at least some of said images to identify said defect. There is also disclosed a method and device for producing a film.

公开(公告)号：US20220372708A1

公开(公告)日：2022-11-24

申请号：US17755339

申请日：2020-11-04

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Chris Bonnerup ,  Isto Heiskanen ,  Katja Lyytikäinen

IPC: D21H19/52 ,  D21H19/34 ,  D21H19/12 ,  C09D101/28 ,  B32B23/06 ,  B32B27/10

Abstract: A method for reducing the surface oil absorption of cellulose based substrate is provided, in which a coating composition is applied to said substrate; and in which the coating composition comprises carboxymethyl cellulose (CMC) and/or a salt of carboxymethyl cellulose (CMC). A coated paperboard, and a laminate of the coated paperboard with a polymer layer is also provided. The coating composition provides improved surface oil absorption and improved adherence of an overlying polymer layer.

公开(公告)号：US20220372250A1

公开(公告)日：2022-11-24

申请号：US17755340

申请日：2020-11-04

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Katja Lyytikäinen ,  Isto Heiskanen ,  Otto Nylén

IPC: C08L1/02 ,  C08B15/00 ,  C08J5/18 ,  C08J7/04 ,  C09D101/28 ,  D21H11/18 ,  D21H19/34 ,  B82Y30/00

Abstract: A cellulosic film comprising MFC is provided, which is coated on at least one surface thereof with at least one cured barrier layer. The cured barrier layer comprises CMC which has been crosslinked with a crosslinking agent. A method for improving the barrier properties of a cellulosic film is also provided.