公开(公告)号：US11619004B2

公开(公告)日：2023-04-04

申请号：US17292191

申请日：2019-11-08

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Jukka Kankkunen ,  Riku Pihko ,  Vesa Kunnari

IPC: D21F3/08 ,  D21F3/04 ,  D21F7/12 ,  D21H11/18

Abstract: The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry content of 1-25% by weight, applying a dewatering felt into direct contact with the fibrous web, conducting said fibrous web, arranged between said dewatering felt and said substrate, through a pressing equipment. The invention further relates to a film produced from said method.

公开(公告)号：US11555275B2

公开(公告)日：2023-01-17

申请号：US16614164

申请日：2018-05-17

Applicant: Stora Enso OYJ

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

IPC: D21H11/18 ,  B32B5/06 ,  B32B23/06 ,  B32B23/08 ,  D21H25/04 ,  B82Y30/00

Abstract: A method of manufacturing a film having an oxygen transmission rate (OTR) value in the range of 0.1 to 200 cc/m2*24 h at 23° C., 50% relative humidity (RH), and an OTR value in the range of 0.1 to 2000 cc/m2*24 h at 38° C. at 85% RH, comprising at least 60% by weight nanocellulose based on the weight of the total amount of fibers in the film, wherein the method comprises the steps of, providing an aqueous suspension comprising said nanocellulose; forming a web from said aqueous suspension; calendering said web at a line load of at least 40 kN/m, and at a temperature of at least 60° C. wherein said film is formed and said web has an OTR value in the range of 50 to 10 000 cc/m2*24 h at 23° C., 50% RH before said calendering step, or more preferably in the range of 500 to 5000 cc/m2*24 h at 23° C., 50% RH before said calendering step.

公开(公告)号：US20220389658A1

公开(公告)日：2022-12-08

申请号：US17755338

申请日：2020-11-04

Applicant: Stora Enso OYJ

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

IPC: D21H11/18 ,  D21H21/16 ,  D21H19/12 ,  D21H19/82 ,  D21H17/14

Abstract: A barrier material comprising (a) at least one layer of cellulosic substrate comprising MFC, and (b) a first barrier layer arranged on at least one surface of said cellulosic substrate, is provided, as well as a method for reducing the water vapour transmission rate (WVTR) of a cellulosic substrate.

公开(公告)号：US11459159B2

公开(公告)日：2022-10-04

申请号：US16316729

申请日：2017-07-03

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Seppo Lampainen ,  Simo Siitonen ,  Marianne Andersson

IPC: B65D81/26 ,  A23B7/157 ,  A23L3/358 ,  B01J20/02 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32 ,  B65D65/42 ,  C08L1/02 ,  D21H19/02 ,  D21H21/22 ,  D21H11/18 ,  C08B15/08 ,  D21H27/10 ,  A23B7/14 ,  B01J20/26 ,  B01J20/24 ,  A23L3/34

Abstract: The present invention relates to a material suitable for use in packages comprising nano-sized cellulose and an ethylene scavenging or ethylene absorbing agent. The invention also relates to methods for manufacturing such material, which may be paper, label, paperboard, plastic or film products.

公开(公告)号：US20220228319A1

公开(公告)日：2022-07-21

申请号：US17658308

申请日：2022-04-07

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

IPC: D21H11/18 ,  D21H13/08 ,  D21H13/10 ,  D21H17/28 ,  D21H17/33 ,  D21H17/68 ,  D21H21/10 ,  D21H21/18 ,  D21H21/52 ,  D21H23/48

Abstract: The present invention relates to a method for production of product comprising a first ply, the method comprising the steps of: providing a fibrous suspension comprising fibers; providing said fibrous suspension to a porous medium to form a substrate comprising fibers; providing a first additive suspension comprising a first strengthening agent, wherein the first strengthening agent is microfibrillated cellulose; providing a second additive suspension comprising at least one retention agent and/or at least one drainage agent; dewatering said substrate on said porous medium; performing additive addition to said substrate during said dewatering of said substrate on said porous medium, wherein the additive addition is performed when the substrate has a dry content of less than 20 weight-%, preferably less than 10 weight-%, most preferably less than 7 weight-%, and wherein the additive addition comprises adding at least a layer of said first additive suspension and a layer of said second additive suspension to said substrate by means of multilayer curtain coating, and further dewatering and drying said substrate after said dewatering on said porous medium so as to provide said first ply. The invention also relates to a paper, board or non-woven product obtainable by the method.

公开(公告)号：US11319672B2

公开(公告)日：2022-05-03

申请号：US16975786

申请日：2019-02-25

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

IPC: D21H11/18 ,  D21H13/08 ,  D21H13/10 ,  D21H17/28 ,  D21H17/33 ,  D21H17/68 ,  D21H21/10 ,  D21H21/18 ,  D21H21/52 ,  D21H23/48

Abstract: The present invention relates to a method for production of product comprising a first ply, the method comprising the steps of: providing a fibrous suspension comprising fibers; providing said fibrous suspension to a porous medium to form a substrate comprising fibers; providing a first additive suspension comprising a first strengthening agent, wherein the first strengthening agent is microfibrillated cellulose; providing a second additive suspension comprising at least one retention agent and/or at least one drainage agent; dewatering said substrate on said porous medium; performing additive addition to said substrate during said dewatering of said substrate on said porous medium, wherein the additive addition is performed when the substrate has a dry content of less than 20 weight-%, preferably less than 10 weight-%, most preferably less than 7 weight-%, and wherein the additive addition comprises adding at least a layer of said first additive suspension and a layer of said second additive suspension to said substrate by means of multilayer curtain coating, and further dewatering and drying said substrate after said dewatering on said porous medium so as to provide said first ply. The invention also relates to a paper, board or non-woven product obtainable by the method.

公开(公告)号：US20220064390A1

公开(公告)日：2022-03-03

申请号：US17454112

申请日：2021-11-09

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

IPC: C08J5/18 ,  C08K3/34 ,  C08K3/36 ,  C08L1/02 ,  D21H11/18 ,  D21H17/68 ,  D21H21/52

Abstract: A film comprising microfibrillated cellulose, nanoparticles, and a retention polymer. The nanoparticles are nanosilica nanoparticles that are anionic at neutral or alkaline pH and have at least one dimension less than 100 nm; and the retention polymer is starch. According to the present invention a high amount of nanoparticles is used as an additive, optionally together with a retention polymer.

公开(公告)号：US11077648B2

公开(公告)日：2021-08-03

申请号：US16087281

申请日：2017-03-21

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Seppo Lampainen ,  Jukka Kankkunen

IPC: B32B29/08 ,  D21H27/10 ,  D21H27/38 ,  D21H27/40 ,  D21H11/18 ,  D21H17/25 ,  D21H21/16 ,  D21H21/18 ,  D21H17/16 ,  D21H17/17 ,  D21H17/62 ,  B65D65/40 ,  B32B29/00

Abstract: A corrugated fiberboard comprising cellulosic fibers, wherein said corrugated fiberboard has at least one of a geometrical tensile index in the range of from 32 to 65 Nm/g, a fracture toughness index in the range of from 4 to 24 Jm/kg, and a ring crush index in the range of from 5 to 10 Nm/g5 measured at relative humidity of 85% RH; wherein the cellulosic fibers comprises a mixture of less refined fibers having a Schopper-Riegler (SR) value in the range of 15 to 28 and microfibrillated cellulose fibers, wherein mixture comprises said microfibrillated cellulose in a range of from 1% to 5% by weight of the dry content of the cellulosic fibers.

公开(公告)号：US20200318293A1

公开(公告)日：2020-10-08

申请号：US16955928

申请日：2018-12-18

Applicant: Stora Enso OYJ

Inventor： Esa Saukkonen ,  Isto Heiskanen ,  Ville Ribu

IPC: D21H27/10 ,  D21H11/18 ,  D21H19/22 ,  B32B27/10 ,  B32B27/32

Abstract: The present invention relates to a laminate having oxygen barrier properties, which laminate comprises; a porous fiber based layer comprising nanocellulose and cellulosic fibers wherein said fiber based layer has an air resistance of less than 4000 s/100 ml measured according to ISO5636/6 and a polymer layer attached to at least one side of said fiber based layer to form said laminate. The present invention further relates to a method to produce said laminate and a paper or paperboard product comprising the laminate and the use of the laminate.

公开(公告)号：US10711403B2

公开(公告)日：2020-07-14

申请号：US15737000

申请日：2016-06-29

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Jari Rasanen

IPC: D21H27/38 ,  D21H21/56 ,  D21F11/00 ,  D21H11/02 ,  D21H11/14 ,  D21H27/30 ,  B65D1/34 ,  D21J3/12 ,  D21J7/00

Abstract: The invention relates to a method of manufacturing a shaped tray or plate of fibrous material. The method comprises the steps of (i) providing a fibrous pulp, in which the fibres substantially consist of at least 85 wt-% of softwood fibres having an average fibre length of at least 2.0 mm and at most 15 wt-% of broke having a fibre length of about 0.05 mm to 1.0 mm, (ii) turning the pulp into a foamed suspension, (iii) supplying the foamed suspension from a headbox to a forming fabric of a board machine to form a fibrous web, (iv) drying the web to obtain a dried web having a compressibility in the thickness direction of at least 20%, and (v) including the web as a layer in a board, which is turned to said tray or plate by thermopressing or deep-drawing. The invention even covers shaped trays and plates produced by use of the method.