公开(公告)号：US20240240406A1

公开(公告)日：2024-07-18

申请号：US18559422

申请日：2022-05-13

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Jukka Kankkunen

IPC: D21H27/10 ,  D21H11/04 ,  D21H11/06 ,  D21H17/25 ,  D21H17/28 ,  D21H21/10 ,  D21H21/16 ,  D21H21/18 ,  D21H27/40

CPC classification number: D21H27/10 ,  D21H11/04 ,  D21H11/06 ,  D21H17/25 ,  D21H17/28 ,  D21H21/10 ,  D21H21/16 ,  D21H21/18 ,  D21H27/40

Abstract: The present invention relates to a multiply containerboard for use in corrugated board, said multiply containerboard comprising: a first outer ply comprising a strength enhancement agent, a second outer ply comprising a strength enhancement agent, and an interfacial layer joining said first and second outer ply, wherein each of said first and second outer ply comprise at least 50 wt % neutral sulfite semi chemical (NSSC) pulp based on dry weight, and wherein said interfacial layer comprises a strength enhancement agent in an amount of 0.5-20 gsm wherein the amount of strength enhancement agent in the interfacial layer is higher, preferably at least twice as high as the concentration of the strength enhancement agent in each of the first and second outer ply.

公开(公告)号：US20240191435A1

公开(公告)日：2024-06-13

申请号：US18555328

申请日：2022-04-13

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Matthias Krätschell ,  Cecilia Land Hensdal

IPC: D21H19/12 ,  B29C43/24 ,  B29K1/00 ,  D21H11/18 ,  D21H19/72 ,  D21H25/06

CPC classification number: D21H19/12 ,  B29C43/24 ,  D21H11/18 ,  D21H19/72 ,  D21H25/06 ,  B29K2001/00 ,  B29K2995/0069 ,  B29K2995/0077 ,  B29K2995/0097

Abstract: The present invention relates to a process for manufacturing a barrier film, wherein the method comprises: —providing an aqueous suspension comprising at least 70 weight-% highly refined cellulose pulp having an SR value of 70-95 and having a content of fibers having a length>0.2 mm of at least 10 million fibers per gram based on dry weight: —forming a wet web; —dewatering and/or drying to form a substrate; —calendering said substrate in at least a first calender nip and a second calender nip; —providing said substrate with at least one first layer of a barrier chemical to form a coated substrate, wherein each first layer has a coat weight of 0.5-5 gsm, and wherein a total coat weight on of the first layers is ≤8 gsm, and—drying to form said barrier film having a thickness of

公开(公告)号：US11999132B2

公开(公告)日：2024-06-04

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 ,  B32B15/20 ,  B32B27/10 ,  B65D65/40 ,  B65D65/42 ,  C08J5/18 ,  D21H11/18 ,  D21H19/04 ,  D21H19/08 ,  D21H19/22 ,  D21H19/82 ,  D21H19/84 ,  D21H27/10

CPC classification number: B32B15/085 ,  B32B15/20 ,  B32B27/10 ,  B65D65/40 ,  B65D65/42 ,  C08J5/18 ,  D21H11/18 ,  D21H19/04 ,  D21H19/08 ,  D21H19/22 ,  D21H19/824 ,  D21H19/84 ,  D21H27/10 ,  B32B2307/7244 ,  B32B2439/70 ,  C08J2323/06

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.

公开(公告)号：US11920297B2

公开(公告)日：2024-03-05

申请号：US17415878

申请日：2019-12-20

Applicant: Stora Enso OYJ

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

IPC: D21H11/18 ,  D21C9/00 ,  D21H17/28

CPC classification number: D21C9/005 ,  D21H11/18 ,  D21H17/28

Abstract: The present invention relates to a method for preparing a surface-treated fibrous material comprising nanocellulose, in which a fibrous material is surface treated with an organic acid or salt thereof. Fibrous materials as such are also provided. The present technology allows improved Water Vapor Transmission Rates (WVTR) for the fibrous material, while operating on an industrial scale.

公开(公告)号：US20240003092A1

公开(公告)日：2024-01-04

申请号：US18042116

申请日：2021-08-31

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Anna Kauppi ,  Jukka Kankkunen ,  Juha Korvenniemi

IPC: D21H27/38 ,  D21H11/18 ,  D21H25/12

CPC classification number: D21H27/38 ,  D21H11/18 ,  D21H25/12

Abstract: The present invention relates to a method for manufacturing a multilayer machine glazed paper comprising highly refined cellulose fibers, the method comprising the steps of: forming a first wet web by applying at least one first pulp suspension comprising highly refined cellulose fibers on a first wire; partially dewatering the first wet web to obtain a first partially dewatered web; forming a second wet web by applying at least one second pulp suspension comprising highly refined cellulose fibers on a second wire; partially dewatering the second wet web to obtain a second partially dewatered web; joining the first and second partially dewatered web to obtain a multilayer web; optional dewatering the multilayer web in a dewatering unit, and glazing the multilayer web in at least one glazing unit to obtain a multilayer machine glazed paper comprising highly refined cellulose fibers. The invention also relates to a multiply MG paper produced according to the method.

公开(公告)号：US20230257937A1

公开(公告)日：2023-08-17

申请号：US18003187

申请日：2021-06-24

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Jukka Kankkunen ,  Anna Kauppi ,  Mikael Hjerpe ,  Juha Korvenniemi

IPC: D21F3/02 ,  D21H11/18 ,  D21F11/14 ,  C08J5/18

CPC classification number: D21F3/0218 ,  C08J5/18 ,  D21F11/145 ,  D21H11/18 ,  C08J2301/02 ,  D21C9/002

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 wt-% to 100 wt-% 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 support, through at least one shoe press equipment, drying the dewatered web to form a film which film has an Oxygen Transmission Rate (OTR) value (23° C., 50% RH) below 100 cc/m2/24 h according to ASTM D-3985.

公开(公告)号：US20230243099A1

公开(公告)日：2023-08-03

申请号：US18042115

申请日：2021-08-31

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Anna Kauppi ,  Juha Korvenniemi ,  Jukka Kankkunen

IPC: D21F11/04 ,  D21H11/18 ,  D21H21/16 ,  D21H19/12 ,  D21H27/30

CPC classification number: D21F11/04 ,  D21H11/18 ,  D21H21/16 ,  D21H19/12 ,  D21H27/30

Abstract: The present invention relates to a method for producing a machine glazed paper comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 0.1 wt-% to 50 wt-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a wire wherein said web has a dry content of 1-25% by weight, dewatering the fibrous web in at least one dewatering unit, glazing at least one side of the dewatered fibrous web in a glazing unit to form the machine glazed paper. The invention further relates to a MG paper produced according to the method.

公开(公告)号：US20230242795A1

公开(公告)日：2023-08-03

申请号：US17999065

申请日：2021-05-31

Applicant: Stora Enso OYJ

Inventor： Katja Lyytikäinen ,  Isto Heiskanen ,  Kaj Backfolk

IPC: C09J103/02 ,  C09J11/08 ,  C09J11/06 ,  D21H27/36 ,  B31F5/04 ,  B32B7/12 ,  B32B29/00 ,  B32B29/08 ,  B32B3/28

CPC classification number: C09J103/02 ,  B31F5/04 ,  B32B3/28 ,  B32B7/12 ,  B32B29/005 ,  B32B29/08 ,  C09J11/06 ,  C09J11/08 ,  D21H27/36 ,  B32B2255/12 ,  B32B2255/24 ,  B32B2307/718 ,  B32B2307/7244

Abstract: The present invention relates to a method for the production of an adhesive component wherein said method comprises the following steps: providing a suspension comprising starch granules, adding a suspension comprising microfibrillated cellulose to the suspension comprising starch granules, drying the starch granules and microfibrillated cellulose suspension to a dry content above 70 wt-% to form said adhesive component. The invention also relates to an adhesive, a corrugated board, paper and paperboard comprising said adhesive and to the adhesive component produced according to the method.

公开(公告)号：US20230151552A1

公开(公告)日：2023-05-18

申请号：US17995445

申请日：2021-04-14

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Anna Kauppi ,  Jukka Kankkunen

IPC: D21H27/38 ,  D21H11/18 ,  D21F11/04 ,  D21H21/26

CPC classification number: D21H27/38 ,  D21H11/18 ,  D21F11/04 ,  D21H21/26

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.

公开(公告)号：US20230132010A1

公开(公告)日：2023-04-27

申请号：US17996939

申请日：2021-05-06

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Jukka Kankkunen

IPC: D21H19/82 ,  D21F1/66 ,  D21H27/10 ,  D21H11/18 ,  D21H19/12 ,  D21H19/08 ,  C23C16/06 ,  C23C16/455 ,  C23C16/02

Abstract: The present invention is directed to a process for manufacturing a nano-coated pulp-based substrate comprising the steps of: a) providing a suspension comprising pulp, said pulp having Schopper Riegler value of at least 70°; b) using the suspension of step a) to form a wet web; c) dewatering and/or drying the wet web to form a substrate; d) adding a first layer of an acrylic monomer solution comprising less than 2 wt-% water to the surface of the substrate, followed by radiation curing the first layer; e) optionally adding a second layer comprising an acrylic monomer solution to the surface of the cured first layer and radiation curing the second layer; f) providing a nano-coating on the surface of the cured first or second layer such that a nano-coating having a thickness in the range of from 0.1 nm to 100 nm is provided on the substrate.