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.

公开(公告)号：US20190292727A1

公开(公告)日：2019-09-26

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 ,  D21H11/18 ,  C08B11/12 ,  C08B15/04

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：US10421230B2

公开(公告)日：2019-09-24

申请号：US14430675

申请日：2013-09-24

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Nina Miikki

IPC: B05D3/12 ,  B29C59/02 ,  B32B37/10 ,  D21H27/10 ,  D21H19/20 ,  D21H19/66 ,  D21H21/16 ,  B32B27/10 ,  B32B27/32 ,  C09D123/06 ,  B29C59/04 ,  B29K23/00

Abstract: The present invention relates to a method for manufacturing a polymer product with super- or highly hydrophobic characteristics, preferably in the form of a film. Also methods for the manufacturing of a laminate and a polymer coated paper or board product, respectively, both having said characteristics, are disclosed.The present invention also relates to products obtainable by said methods and uses thereof.

公开(公告)号：US20190248988A1

公开(公告)日：2019-08-15

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 ,  C08J5/18 ,  C08K5/00

CPC classification number: C08L1/02 ,  C08J5/18 ,  C08J2301/02 ,  C08K5/0025 ,  C08L2203/16 ,  C08L2312/00 ,  C09D101/02 ,  D21F11/00 ,  D21H11/18 ,  F26B13/00

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：US10364533B2

公开(公告)日：2019-07-30

申请号：US15588045

申请日：2017-05-05

Applicant: STORA ENSO OYJ

Inventor： Isto Heiskanen ,  Karita Kinnunen ,  Tuomo Hjelt

IPC: D21H27/30 ,  D21H21/16 ,  D21H21/24 ,  D21H21/56 ,  D21H17/17 ,  D21H17/22 ,  D21H11/18 ,  D21H11/02 ,  D21H11/00 ,  D21F11/00

Abstract: A hydrophobically sized fibrous web layer, preparation of a fibrous web or a fiber-based coating, a multilayer board product having at least a middle layer formed of said fibrous web, as well as use of a heat-sensitive surfactant for said methods and products, whereby microfibrillated cellulose (MFC) and hydrophobic size are brought to a foam with water and the heat-sensitive surfactant, the foam is supplied to a forming fabric of a paper or board machine, dewatered by suction of air through the forming fabric, and dried to a web product. Alternatively the foam may be supplied onto a premade fibrous web and dried to form a coating layer. The hydrophilic functionality of the surfactant contained in the web may be destroyed by heating. Pulp of a greater fiber length, such as CTMP, may be included, to provide improved wet and dry tensile strength for the paper and board products.