公开(公告)号：US20230002976A1

公开(公告)日：2023-01-05

申请号：US17757257

申请日：2020-12-22

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Otto Nylén

IPC: D21H23/24 ,  D21F11/00 ,  D21H19/66 ,  D21H27/02 ,  D21H19/16 ,  D21H19/28 ,  D06B1/10 ,  D06M15/17 ,  D06M13/10 ,  D06M13/188 ,  D06M13/02 ,  D06M15/227

Abstract: A method is provided for coating a fibrous web, in particular a fibrous web comprising nanocellulose fibres. The method includes steps of applying a coating agent to a textured surface region of a textured substrate, applying a fibre furnish or a wet fibrous web onto the coated textured surface region of the textured substrate, optionally dewatering to provide a wet fibrous web, and drying said wet fibrous web such that at least a portion of said coating agent is transferred to said fibrous web. The method provides a coated fibrous web with improved barrier properties.

公开(公告)号：US11518858B2

公开(公告)日：2022-12-06

申请号：US16345994

申请日：2017-10-31

Applicant: Stora Enso OYJ

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

IPC: C08J5/18 ,  D21H11/18 ,  D21H25/04 ,  C09D101/02 ,  B32B29/02 ,  D21H19/34 ,  D21H19/22

Abstract: A method of forming a film comprising nanocellulose having an Oxygen Transmission Rate (OTR) value in the range of 0.1 to 300 cc/m2/24 h at 38° C. and 85% relative humidity (RH), and having a basis weight in the range of in the range of 0.1 to 45 g/m2 wherein the method comprises the steps of; providing a suspension comprising nanocellulose, forming at least one layer of a web or a film from said suspension; drying said formed web or film to a dry content of at least 65 weight-%, wherein said method further comprises the steps of; treating at least one side of said dewatered and dried web or film with ultra violet (UV) or electron beam (EB) irradiation; and wherein at least one cooling step is provided in connection with or after the UV or EB treatment step.

公开(公告)号：US20220235201A1

公开(公告)日：2022-07-28

申请号：US17596530

申请日：2020-06-15

Applicant: Stora Enso OYJ

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

IPC: C08L1/02 ,  C08J5/18 ,  C08L33/26 ,  D21H11/18 ,  D21H17/41 ,  D21H17/66 ,  D21H17/00

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 native microfibrillated cellulose, wherein the content of the microfibrillated cellulose of said suspension is in the range of 40 to 99.9 weight-% based on total dry solid content, said fibrous suspension further comprising organic acid, a metal salt or a mixture thereof, wherein the amount of organic acid, metal salt or mixture thereof is at least 2 weight-% based on total dry solid content of the suspension, —said fibrous suspension also comprising an uncharged, amphoteric or weakly cationic polymer having a molecular weight of at least 50000 g/mol, —said fibrous suspension also comprising an anionic polymer having a molecular weight of at least 10000 g/mol to said suspension, —providing said suspension to a substrate to form a fibrous web, wherein the amount of uncharged, amphoteric or weakly cationic polymer in said suspension 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 suspension is in the range of 0.01 to 10 kg/metric ton based on total dry solid content; and —dewatering said fibrous web to form a fibrous product.

公开(公告)号：US20210372051A1

公开(公告)日：2021-12-02

申请号：US17299988

申请日：2019-12-20

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Katja Lyytikäinen ,  Gisela Cunha ,  Kaj Backfolk

IPC: D21H11/18 ,  D21H11/20 ,  D21H17/66 ,  D21H23/46

Abstract: The present invention relates to a method for preparing a surface-treated fibrous material comprising phosphorylated nanocellulose, in which a fibrous material is surface treated with a solution comprising at least one multivalent metal ion followed by drying and post-curing to improve the barrier properties of the material. Fibrous materials as such are also provided.

公开(公告)号：US11155698B2

公开(公告)日：2021-10-26

申请号：US16314592

申请日：2017-06-27

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Esa Saukkonen ,  Kaj Backfolk

IPC: C08L1/02 ,  D21H11/18 ,  C09D101/02 ,  F26B13/00 ,  D21F11/00 ,  C08J5/18 ,  C08K5/00

Abstract: The present invention relates to a method for the production of a film comprising microfibrillated cellulose, wherein the method comprises the steps of; providing a suspension comprising microfibrillated cellulose, applying the suspension on a substrate to form a fibrous web, wherein the web has a first and a second side, conducting the web to a contact drying equipment wherein the first side of said web is in direct contact with of the contact drying equipment at a temperature above 100° C. whereby the web is at least partly dried forming a film. The invention also relates to a film produced according to the method.

公开(公告)号：US11078626B2

公开(公告)日：2021-08-03

申请号：US15309286

申请日：2015-05-06

Applicant: STORA ENSO OYJ

Inventor： Kaj Backfolk

IPC: D21H13/12 ,  D21H17/70 ,  D21H13/14 ,  D21H13/24 ,  D21H17/35 ,  D21H17/53 ,  D21H17/00 ,  D21H17/67 ,  D21H17/37 ,  D21H17/28

Abstract: A method for forming a thermoplastic composite material in a papermaking machine, wherein the method comprises the steps of: forming an aqueous fiber material suspension; bringing said fiber suspension in contact with at least one additive, said additive being introduced into said fiber suspension, whereby said additive reacts to form a precipitation product onto or into the fibers, thereby forming an intermediate suspension, introducing, after the formation of the intermediate suspension, a plastic material into said intermediate suspension, thereby forming a plastic fiber composite suspension.

公开(公告)号：US20210214896A1

公开(公告)日：2021-07-15

申请号：US17056235

申请日：2019-05-14

Applicant: Stora Enso OYJ

Inventor： Tuula Sokka ,  Kaj Backfolk

IPC: D21H21/30 ,  C09D5/22 ,  C09D5/00 ,  C09D125/14 ,  C09D133/06 ,  C09D7/63 ,  C09D7/41 ,  C09D7/61 ,  D21H19/58 ,  D21H19/38 ,  D21H19/40 ,  D21H19/42 ,  D21H19/82

Abstract: The present invention relates to a coating composition for coating of paper or paperboard, said composition comprising: a pigment, a binder, an optical brightening agent (OBA), a colorant, and a sugar alcohol, and to paper or paperboard coated with at least one layer of the coating composition. The present invention further relates to a method for preparing said coating composition and to an OBA premix useful in the method of preparing the coating composition, said premix comprising an OBA, a sugar alcohol, and optionally a colorant, wherein the OBA and sugar alcohol together make up at least 10% by weight, preferably at least 20% by weight, based on the total weight of solids in the premix.

公开(公告)号：US11001969B2

公开(公告)日：2021-05-11

申请号：US16316790

申请日：2017-07-03

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Kirsi Partti-Pellinen ,  Simo Siitonen

IPC: D21F11/00 ,  D21H17/28 ,  D21H21/36 ,  D21H21/56 ,  D21H19/22

Abstract: The present invention relates to a new process for creating foam in a process for manufacturing a paper or board product. According to the present invention, certain types of antimicrobial starch is used in the creation of the foam.

公开(公告)号：US20200239652A1

公开(公告)日：2020-07-30

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 ,  D21H11/18 ,  D21H11/20 ,  D21H17/00 ,  D21H17/05 ,  D21H19/34 ,  D21H19/52 ,  C12N9/42 ,  C12N9/24

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：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.