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.

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.

公开(公告)号：US11479915B2

公开(公告)日：2022-10-25

申请号：US16316864

申请日：2017-07-03

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Katja Lyytikäinen ,  Heidi Saxell

IPC: D21H13/04 ,  C08B11/12 ,  C08B15/04 ,  D21H11/18 ,  D21C9/00 ,  C08L1/02

Abstract: The present invention relates to a method for manufacturing an intermediate product that can be stored and transported and efficiently converted into microfibrillated cellulose with limited energy input at the time of conversion. More specifically, the invention involves the use of dewatered carboxymethylcellulose or carboxylated cellulose fiber having a low degree of substitution and a high amount of additives.

公开(公告)号：US11459432B2

公开(公告)日：2022-10-04

申请号：US16461897

申请日：2017-11-16

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Esa Saukkonen ,  Ville Ribu ,  Katja Lyytikäinen

IPC: C08J5/18 ,  D21H11/18 ,  D21H25/04 ,  D21H19/34 ,  D21H13/00 ,  D21H21/18 ,  D21H19/52 ,  D21H21/16 ,  D21H17/28

Abstract: Method for making a film that comprises microfibrillated cellulose, wherein the film has low OTR values and especially suitable for a tropical environment. The method comprising the steps of providing a suspension comprising microfibrillated cellulose (MFC), forming a film from said suspension, wherein the film having a solid content above 40%, preferably above 50%, treating the film with flame or plasma treatment, such that a surface activation takes place on the film, and cooling the film, wherein the surface of the film having a decreased OTR value and a high moisture resistance.

公开(公告)号：US20220298264A1

公开(公告)日：2022-09-22

申请号：US17299986

申请日：2019-12-04

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Mari Hiltunen ,  Nina Ruohoniemi ,  Titta Lammi ,  Ville Ribu ,  Tim Lindfors ,  Jari Räsänen

IPC: C08B1/00 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  C08B31/00 ,  C08B30/10 ,  B29C64/118

Abstract: The present invention relates to a web of fibrous cellulosic material derived from wood pulp, said web being suitable for three-dimensional moulding to form a packaging product, wherein the web comprises >40 wt % of soft wood chemical pulp and at least one strength enhancement agent, wherein the web has a grammage less than 400 g/m2, and wherein the cellulose fibers of said soft wood chemical pulp comprise a fiber curl of >9%.

公开(公告)号：US11326306B2

公开(公告)日：2022-05-10

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 ,  B32B27/10 ,  B32B27/32 ,  D21F1/00 ,  D21H17/32 ,  D21H17/42 ,  D21H17/45 ,  D21H21/08 ,  D21H23/04

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：US11319671B2

公开(公告)日：2022-05-03

申请号：US16080359

申请日：2017-03-30

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Katja Lyytikäinen

IPC: D21H11/18 ,  D21H17/68 ,  D21H17/37 ,  D21H17/28 ,  D21H17/55 ,  D21H21/10 ,  D21H27/38 ,  D21H17/44 ,  D21H17/29 ,  D21H21/52 ,  D21H17/24 ,  D21H27/10 ,  D21H17/13 ,  D21H21/50 ,  B82Y30/00

Abstract: The present invention relates to a new process for improving dewatering when manufacturing a film comprising high amounts of microfibrillated cellulose (MFC) without negatively impacting the film properties. According to the present invention a high amount of nanoparticles is used as an additive, optionally together with a polymer.

公开(公告)号：US20220074140A1

公开(公告)日：2022-03-10

申请号：US17415878

申请日：2019-12-20

Applicant: Stora Enso OYJ

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

IPC: D21C9/00 ,  D21H11/18 ,  D21H17/28

Abstract: The present invention relates to a method for preparing a surface-treated fibrous material comprising nanocellulose, in which a fibrous material is surface treated with an organic acid or salt thereof. Fibrous materials as such are also provided. The present technology allows improved Water Vapor Transmission Rates (WVTR) for the fibrous material, while operating on an industrial scale.

公开(公告)号：US11242652B2

公开(公告)日：2022-02-08

申请号：US16075715

申请日：2017-02-17

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Esa Saukkonen

IPC: D21H15/00 ,  D21H11/18 ,  D21H11/16 ,  B65D65/38 ,  B65D85/10 ,  D21H17/35 ,  D21H17/67 ,  D21H17/68 ,  D21H19/10 ,  D21H15/02 ,  D21F11/02 ,  D21H21/28 ,  D21H27/10

Abstract: A sheet having dead-fold properties, wherein said sheet comprises cellulose fibers whereof at least 75%, preferably at least 90%, or more preferably at least 95% of said cellulose fibers have a fiber length of less than 1 mm, and wherein the tensile strength ratio (MD/CD) of the film is above 1.4, preferably higher than 1.6 and most preferably higher than 1.8.