公开(公告)号：US20230256702A1

公开(公告)日：2023-08-17

申请号：US18004502

申请日：2021-07-08

Applicant: Stora Enso OYJ

Inventor： Maria Törnblom

IPC: B31D5/02 ,  B31D5/00 ,  D04H1/00 ,  D04H1/732 ,  D21H27/10 ,  D21H27/42

CPC classification number: B31D5/02 ,  B31D5/0039 ,  D04H1/005 ,  D04H1/732 ,  D21H27/10 ,  D21H27/42 ,  B31D2205/0005

Abstract: A 3D shaped product (20) is formed by hot pressing of an air-laid blank (10) comprising natural fibers at a concentration of at least 70% by weight of the air-laid blank and a thermoplastic polymer binder at a concentration selected within an interval of from 2.5 up to 30% by weight of the air-laid blank. The 3D shaped product (20) is recyclable in a repulping process. At least a part of the thermoplastic polymer binder is water soluble at a repulping temperature of the repulping process. The 3D shaped product (20) are environmentally friendly alternatives to plastic 3D shaped products made by foamed polymers and can be recycled in existing recycling schemes.

公开(公告)号：US20230193559A1

公开(公告)日：2023-06-22

申请号：US17907028

申请日：2021-03-22

Applicant: Stora Enso OYJ

Inventor： Otto Nylén ,  Isto Heiskanen ,  Joanna Rahko ,  Riku Pihko

IPC: D21H11/18 ,  D21F3/02 ,  D21H17/06 ,  D21H25/06

CPC classification number: D21H11/18 ,  D21F3/0236 ,  D21H17/06 ,  D21H25/06 ,  B82Y30/00

Abstract: The present invention relates to a method for producing a film comprising nanocellulose, which method comprises: providing a suspension comprising 50-100 weight-% of nanocellulose based on total dry weight; forming a fibrous web of said suspension on a non-porous support; providing a press fabric comprising a web-side first surface and an opposite second surface, wherein said press fabric comprises a woven first fabric layer arranged in the press fabric as a layer providing said web-side first surface such that said press fabric has a woven surface structure at said web-side first surface; applying said web-side surface of said press fabric into direct contact with said web; wet-pressing said web by conducting said web, arranged between said press fabric and said non-porous support, through a pressing equipment, and drying the dewatered web so as to form said film. The invention further relates to a film produced from said method.

公开(公告)号：US20230151553A1

公开(公告)日：2023-05-18

申请号：US17995448

申请日：2021-04-14

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Katja Lyytikäinen

IPC: D21H27/38 ,  D21F11/04 ,  D21H11/18 ,  D21H11/04 ,  D21H17/23 ,  B32B5/02 ,  B32B5/26

CPC classification number: D21H27/38 ,  D21F11/04 ,  D21H11/18 ,  D21H11/04 ,  D21H17/23 ,  B32B5/02 ,  B32B5/26 ,  B32B2262/062 ,  B32B2307/718 ,  B32B2307/724 ,  B32B2250/20

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) 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; wherein at least one of said first and second pulp suspension comprises lignin at a concentration in the range of 0.1-50 wt %, based on the total dry weight of the pulp suspension.

公开(公告)号：US20230135217A1

公开(公告)日：2023-05-04

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 ,  D21H17/29 ,  D21H21/06 ,  D21H27/38 ,  D21H11/18

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 y 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：US20230131438A1

公开(公告)日：2023-04-27

申请号：US17996940

申请日：2021-05-06

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Katja Lyytikäinen

IPC: D21H19/34 ,  D21H27/10 ,  D21H23/56 ,  D21H23/54

Abstract: The present invention is directed to a coated paper substrate that is particularly suitable for metallization and other nano-coatings that provide barrier properties and are applied using vacuum deposition techniques. The invention is also directed to a process for preparing the coated paper substrate. The invention is also directed to a packaging material comprising the coated paper substrate.

公开(公告)号：US20230016725A1

公开(公告)日：2023-01-19

申请号：US17756983

申请日：2020-12-15

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen

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

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：US11504956B2

公开(公告)日：2022-11-22

申请号：US16471983

申请日：2017-12-21

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Esa Saukkonen

IPC: D21F5/00 ,  B32B29/02 ,  D21C9/18 ,  D21H11/18 ,  D21H19/34 ,  D21H23/26

Abstract: The present invention relates to a method for the production of a coated paper, paperboard or film, wherein the method comprises the steps of; providing a first suspension comprising cellulose fibers, applying the first suspension on a substrate to form a fibrous web, wherein the web has a first and a second side, providing a second suspension comprising micro fibrillated cellulose, applying the second suspension either to the first side of the fibrous web or to a surface of a drying equipment and conducting said fibrous web through the drying equipment whereby the second suspension is added to the first side of the web forming the coated paper, paperboard or film. The invention also relates to a paper, paperboard or film produced according to the method.

公开(公告)号：US20220363871A1

公开(公告)日：2022-11-17

申请号：US17597317

申请日：2020-06-30

Applicant: Stora Enso OYJ

Inventor： Ulla Jansson ,  Anders Moberg ,  Kaj Backfolk

IPC: C08L1/02 ,  D21C9/00 ,  D21H21/52 ,  D21H11/02 ,  D21H27/30 ,  D21H11/18 ,  D21H21/18

Abstract: The present invention relates to a refined cellulose fiber composition useful as a strength enhancing agent for paper and paperboard, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-98 as determined by standard ISO 5267-1, and wherein the refined cellulose fiber composition has a content of fibers having a length >0.2 mm of at least 12 million fibers per gram based on dry weight. The invention further relates to a method for preparing the refined cellulose fiber composition and to pulp paper and paperboard comprising the refined cellulose fiber composition.

公开(公告)号：US20220340735A1

公开(公告)日：2022-10-27

申请号：US17753798

申请日：2020-09-15

Applicant: Stora Enso OYJ

Inventor： Cecilia Land Hensdal ,  Venkata Prabhakar Soudham ,  Kaj Backfolk

IPC: C08L1/02 ,  C08J5/18 ,  C09D101/02 ,  C09D7/63 ,  B65D65/40 ,  B65D65/46

Abstract: The present invention is directed to a film or coating comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said film or coating also comprising at least 1% by weight of extractives from wood bark or cork wood. The invention is also directed to products, such as packaging materials, using or incorporating said film or coating. Such packaging materials are for example laminates or multi-layer structures. The films or coatings according to the present invention having advantageous barrier properties and are therefore particularly suitable for sensitive objects that need to be packaged in a controlled or modified atmosphere. The present invention is also directed to a composition comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said composition also comprising at least 1% by weight of extractives from wood bark or cork wood. The composition is useful for example in the preparation of the film or coating.

公开(公告)号：US11441272B2

公开(公告)日：2022-09-13

申请号：US16643060

申请日：2018-08-30

Applicant: Stora Enso OYJ

Inventor： Tuomo Sippus

IPC: D21H11/18 ,  B32B7/12 ,  B32B29/00 ,  B32B29/08 ,  D21F11/12 ,  C08L1/02 ,  D21D1/20

Abstract: The present invention relates to a method for producing a paperboard comprising the steps of; providing a furnish comprising cellulosic fibers, applying the furnish on at least one wire to form a web, dewatering the web on said at least one wire by subjecting the web to a pressure above 150 kPa without the use of a press roll nip and thereafter pressing the dewatered web to form a paperboard. The invention also relates to a paperboard and a corrugated board.