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：US20220243401A1

公开(公告)日：2022-08-04

申请号：US17610860

申请日：2020-05-13

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Johanna Lyytikainen

IPC: D21H19/12 ,  D21J1/08 ,  D21H23/50 ,  D21H23/48

Abstract: The invention relates to a method for applying starch to a paper or paperboard web, the method comprising the steps of: providing an aqueous suspension comprising starch particles and at least 1 wt %, based on the dry solid content of the suspension, of an amphiphilic polymer, creating a foam of the aqueous suspension, and applying the foam to the paper or paperboard web. The invention further relates to a paper or paper board product obtained by the method.

公开(公告)号：US20220074144A1

公开(公告)日：2022-03-10

申请号：US17417882

申请日：2020-01-23

Applicant: Stora Enso OYJ

Inventor： Frank Peng ,  Kaj Backfolk ,  Isto Heiskanen ,  Teija Laukala

IPC: D21H11/18 ,  D21H17/67 ,  D21H19/52 ,  D21H23/28 ,  D21H23/48 ,  D21H23/50 ,  D21H27/10 ,  D21H27/32 ,  D21H27/38 ,  D21H27/40

Abstract: The invention discloses a paperboard comprising a base ply, a top ply, and an intermediate layer disposed in-between the at least one base ply and the top ply. The intermediate layer comprises pigment and microfibrillated cellulose (MFC). The application of an intermediate layer comprising pigment and MFC in-between the base ply and the top ply gives rise to improved optical properties of the paperboard, even when using an uncoated top ply having a low grammage. This makes it possible to reduce the grammage of top ply and still obtain good optical properties.

公开(公告)号：US20210403734A1

公开(公告)日：2021-12-30

申请号：US17294794

申请日：2019-11-27

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Jukka Kankkunen

IPC: C09D11/14 ,  C08L1/02 ,  C08J5/18

Abstract: The present invention is directed to a process for manufacturing a film or coating comprising high amounts of cellulosic nanomaterial. According to the present invention, a screen printing press, such as a rotary screen press, is used to create a film or coating comprising cellulosic nanomaterial. One benefit of the present process is that the suspension used in the printing process has a high dry content and high viscosity, thereby facilitating the process for manufacturing a film or coating comprising high amounts of cellulosic nanomaterial.

公开(公告)号：US20210363701A1

公开(公告)日：2021-11-25

申请号：US17046410

申请日：2019-04-12

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Jukka Kankkunen ,  Antti Veitola

IPC: D21H19/12 ,  D21H11/18 ,  D21H19/84 ,  D21H23/56 ,  D21H23/64 ,  D21G1/00 ,  B32B37/20 ,  B32B37/15 ,  B32B27/10 ,  B32B29/06

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 and/or nanocellulose, 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 polymers and/or particles wherein the second suspension has a Brookfield viscosity above 3000 m Pas at a dry content between 4%-40% by weight, providing at least one calender comprising at least one roll or belt, applying the second suspension to the surface of the at least one calender roll or belt forming a coating web and conducting said fibrous web through the at least one calender whereby the coating web is applied 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：US20210324580A1

公开(公告)日：2021-10-21

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 ,  D21H11/18 ,  D21F7/12 ,  D21F3/04

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：US10927505B2

公开(公告)日：2021-02-23

申请号：US16076976

申请日：2017-02-10

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Teija Laukala

IPC: D21H17/67 ,  C01F11/18 ,  D21H17/63 ,  C09C1/02

Abstract: The present invention relates to crystalline and stable amorphous CaCO3 precipitated on lignocellulosic fibers.

公开(公告)号：US10913759B2

公开(公告)日：2021-02-09

申请号：US15516281

申请日：2015-09-30

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Valentas Gaidelis ,  Jonas Sidaravicius

IPC: C07G1/00 ,  D21C11/00 ,  C08H7/00

Abstract: The present invention relates to a process for purifying, such as salt/ion depletion, and/or ash reduction, and/or sulphur removal, and/or free sugar depletion, and/or VOC depletion or fractionating, preferably by using dewatering, of a slurry comprising a lignin or lignin derivative or a combination thereof. A lignin or lignin derivative obtainable from said process and uses thereof are also disclosed.

公开(公告)号：US20200325287A1

公开(公告)日：2020-10-15

申请号：US16096800

申请日：2017-04-26

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Jukka Kankkunen

IPC: C08J5/18 ,  B65D81/20

Abstract: The present invention is directed to a film comprising a base film which has been coated on at least one side with a coating that enhances gas and/or moisture barrier properties, wherein the base film comprises a fiber material and at least 60% by weight of said fiber material is microfibrillated cellulose, and the thickness of the coating is from 0.05 to 20 μm. The invention is also directed to products using said film. Such products are in particular packages suitable for sensitive objects that need to be packaged in a controlled or modified atmosphere. The film is also useful for other purposes, such as in the manufacture of balloons.

公开(公告)号：US10683616B2

公开(公告)日：2020-06-16

申请号：US16067985

申请日：2017-01-05

Applicant: Stora Enso OYJ

Inventor： Philip Håkansson ,  Isto Heiskanen

IPC: D21H23/04 ,  D21H17/67 ,  D21H27/18 ,  C01F11/18 ,  D21H23/14 ,  D21H11/18 ,  D21H17/25 ,  D21H17/69 ,  D21H21/18

Abstract: The invention provides a method for the production of a composite comprising microfibrillated cellulose (MFC) and precipitated calcium carbonate. The method is characterized in that MFC is added to a suspension of calcium hydroxide during carbonation, whereby calcium carbonate is precipitated onto fibers or fibrils of the MFC in a controlled manner. By adding microfibrillated cellulose to the calcium suspension during the carbonation, the brightness and the strength of the MFC/PCC-composite is enhanced. Moreover, the inventive method facilitates the distribution of calcium dioxide and MFC in the suspension and thus gives rise to a more homogenous product.