公开(公告)号：US20150094464A1

公开(公告)日：2015-04-02

申请号：US14390519

申请日：2013-04-04

Applicant: Stora Enso OYJ

Inventor： Heidi Saxell ,  Isto Heiskanen ,  Lars Axrup ,  Cecilia Land Hensdal ,  Veikko Jokela

IPC: C08B11/12

CPC classification number: C08B11/12 ,  C08B1/08

Abstract: The present invention provides a method for production of cellulose ethers in a high solids process substantially without use of organic solvents as reaction and/or washing medium. In the method of the invention the first alkalization step is carried out by using high solids content cellulose pulp and solid sodium hydroxide. This is followed by an etherification step where the solids content is preferably further increased and the use of solid etherification reactant is preferred. As no organic solvents are used as reaction media the invented method enables production of cellulose ethers directly from never dried pulp with significant savings in energy and investment costs. The method is especially suitable for the production of carboxymethyl cellulose sodium salt (CMC) with low degree of substitution (DS

Abstract translation: 本发明提供了一种基本上不使用有机溶剂作为反应和/或洗涤介质的高固含量方法生产纤维素醚的方法。 在本发明的方法中，通过使用高固含量的纤维素纸浆和固体氢氧化钠来进行第一碱化步骤。 之后是醚化步骤，其中固体含量优选进一步增加，并且优选使用固体醚化反应物。 由于不使用有机溶剂作为反应介质，本发明的方法可以直接从未干燥的纸浆生产纤维素醚，从而显着节省能源和投资成本。 该方法特别适用于低取代度（DS <0.3）的羧甲基纤维素钠盐（CMC）的生产。 所得到的无水或低水溶性羧甲基化纤维素纤维的使用适用于例如用于生产微纤化纤维素。

公开(公告)号：US12264227B2

公开(公告)日：2025-04-01

申请号：US17756983

申请日：2020-12-15

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen

IPC: C08J9/35 ,  B82Y30/00 ,  C08J9/00 ,  C08L1/02

Abstract: The present invention relates to a foam formed solid composite, comprising: a matrix phase consisting of a mixture of nanocellulose, at least one foaming agent, and optional additives, and a dispersed phase consisting of solid low-density particles having a density of less than 1.2 kg/dm3. The present invention further relates to a method and a liquid foam composition for manufacturing the solid composite.

公开(公告)号：US12258710B2

公开(公告)日：2025-03-25

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 ,  B32B3/26 ,  B32B5/02 ,  B32B5/26 ,  B32B7/12 ,  B32B37/12 ,  D21H11/18 ,  D21H19/34 ,  D21H23/24 ,  D21H23/48 ,  D21H23/50 ,  D21H27/36

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：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：US20230002572A1

公开(公告)日：2023-01-05

申请号：US17757256

申请日：2020-12-22

Applicant: Stora Enso OYJ

Inventor： Otto Nylén ,  Isto Heiskanen ,  Isabel Knöös

IPC: C08J5/18 ,  D21H11/18 ,  D21H17/36 ,  D21H17/25 ,  D21H23/28

Abstract: A method for making a cellulose film comprising microfibrillated cellulose (MFC) is provided, said method comprising the step of: applying an aqueous emulsion of one or more vegetable oils to a surface of a casting substrate. Improved release of the MFC film can thus be achieved.

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.