公开(公告)号：US11198973B2

公开(公告)日：2021-12-14

申请号：US16465426

申请日：2017-11-30

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

IPC: D21H11/18 ,  D21H17/68 ,  D21H17/29 ,  D21H17/55 ,  D21H17/45 ,  D21H23/04

Abstract: The present invention relates to a process wherein microfibrillated cellulose (MFC) is mixed with at least two retention aids, selected from a cationic or amphoteric polymer and a microparticle or nanoparticle as a pre-mix before dosing it to the stock in a process for manufacture of a fiber based product.

公开(公告)号：US11192987B2

公开(公告)日：2021-12-07

申请号：US16489801

申请日：2018-02-27

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

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

Abstract: The present invention relates to a new process for improving runnability and dimensional stability when manufacturing a film comprising high amounts of microfibrillated cellulose (MFC) without negatively impacting the film properties. 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：US11161948B2

公开(公告)日：2021-11-02

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：US20210269672A1

公开(公告)日：2021-09-02

申请号：US17258827

申请日：2019-07-08

Applicant: Stora Enso OYJ

Inventor： Jari Kavakka ,  Staffan Torssell

IPC: C09F3/02 ,  B01D15/18 ,  B01D3/10 ,  B01D3/14 ,  B01D15/30 ,  B01D11/04 ,  G01N30/42

Abstract: A method for removing sulfur-containing compounds from crude sulfate turpentine (CST), said method comprising the step of: subjecting CST to continuous liquid-liquid extraction to remove sulfur-containing compounds.

公开(公告)号：US11105045B2

公开(公告)日：2021-08-31

申请号：US16337130

申请日：2017-09-27

Applicant: Stora Enso OYJ

Inventor： Riku Pihko ,  Vesa Kunnari

IPC: D21H11/18 ,  D21F5/00 ,  D21F5/18 ,  D21H19/00 ,  C08L1/02 ,  C08J5/18 ,  C08B15/02

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 between 70 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension, drying the web in a drying equipment wherein the web is at least partly dried at a drying rate above 75 kg(H2O)/m2/h by use of hot air whereby a film is formed. The invention also relates to a film produce according to the method and a paper or paperboard substrate comprising said film.

公开(公告)号：US11098452B2

公开(公告)日：2021-08-24

申请号：US16471990

申请日：2017-12-18

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Chris Bonnerup

IPC: D21H27/10 ,  B65D65/42 ,  D21H19/22 ,  D21H19/60 ,  D21H19/82

Abstract: The invention relates to a method of manufacturing a heat-sealable packaging material, the method comprising the steps of: providing a paperboard substrate comprising a top ply, applying a first dispersion barrier layer on the top ply, wherein the first dispersion barrier layer comprises a latex having a first glass transition temperature, and applying a second dispersion barrier layer on the first barrier layer, wherein the second dispersion barrier layer comprises a latex having a second glass transition temperature, wherein the second glass transition temperature is higher than the first glass transition temperature, wherein the grammage of the second dispersion barrier layer is lower than the grammage of the first dispersion barrier layer, and wherein the second dispersion barrier layer comprises pigments. The invention further relates to a respective heat-sealable packaging material.

公开(公告)号：US20210245481A1

公开(公告)日：2021-08-12

申请号：US17251363

申请日：2019-06-12

Applicant: Stora Enso OYJ

Inventor： Åsa Nyflött ,  Chris Bonnerup ,  Magnus Ekberg

IPC: B32B27/10 ,  B32B27/32 ,  B65D65/38

Abstract: The invention relates to a packaging material comprising: a paperboard substrate comprising a first and a second side, at least one barrier layer applied on the first side of the substrate, the barrier layer comprising a water-soluble polymer selected from the group of polyvinyl alcohol, a copolymer of ethylene and polyvinyl alcohol, starch, carboxymethylcellulose and combinations thereof in an amount of at least 50 weight %, based on the dry weight of the barrier layer, an extrusion coated layer of a polyolefin on the barrier layer, and at least one dispersion barrier layer applied on the second side of the substrate, which at least one dispersion barrier layer forms a printing surface of the packaging material. The invention further relates to a method of manufacturing a respective packaging material.

公开(公告)号：US11084261B2

公开(公告)日：2021-08-10

申请号：US16087207

申请日：2017-03-20

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Esa Saukkonen ,  Ville Ribu

IPC: B32B29/00 ,  B32B27/32 ,  B32B27/08 ,  B32B5/02 ,  B32B7/12 ,  B32B29/08 ,  B32B27/12 ,  B32B27/34 ,  B32B27/10 ,  B32B37/15 ,  D21H11/18 ,  D21H21/16 ,  C08J5/18 ,  B65D65/40 ,  B29C48/21 ,  B29C48/22 ,  B29C48/08 ,  B32B27/30 ,  B29C48/00 ,  B29C48/154 ,  B29K23/00

Abstract: The invention concerns a fibrous-based oxygen barrier film, which comprises (i) a microfibrillated cellulose (MFC) film, (ii) an oxygen barrier polymer layer, (iii) an optional tie layer, and (iv) an outermost polyolefin layer. The invention even concerns a laminate, in which said multilayer film is combined with a fibrous paper or board base by means of an intermediate polyethylene layer. The oxygen barrier polymerlayer, which preferably is EVOH, and the polyolefin layer are brought by coextrusion onto the MFC film. The film and the laminate according to the invention aim at an improved oxygen barrier in high humidity conditions and have use in oxygen-sensitive food packaging.

公开(公告)号：US20210221114A1

公开(公告)日：2021-07-22

申请号：US17256060

申请日：2019-06-25

Applicant: Stora Enso OYJ

Inventor： Seppo Lampainen ,  Frank Peng ,  Atso Laakso ,  Ari-Pekka Määttänen

IPC: B32B29/00 ,  B32B7/12 ,  B32B29/08 ,  B65D65/40 ,  D21H11/02 ,  D21H11/18 ,  D21H11/10 ,  D21H21/18 ,  D21H17/28 ,  D21H17/45 ,  D21H17/68 ,  D21H17/00 ,  D21H27/40 ,  D21H27/10

Abstract: The invention relates to a ply of a linerboard for corrugated board, which ply exhibits high strength properties and which enables the production of lightweight linerboards. The ply of the invention comprises 20-80 wt % CTMP from wood fibers and 80-20 wt % chemical pulp, calculated on the total fiber weight of said ply and strength additives chosen from the group of microfibrillated cellulose (MFC), anionic or cationic polymers and starchor combinations thereof. The ply exhibits a geometric SCT index of above 22 Nm/g and a density of below 680 kg/m3, preferably of below 650 kg/m3.

公开(公告)号：US11034838B2

公开(公告)日：2021-06-15

申请号：US16483149

申请日：2018-02-01

Applicant: Stora Enso OYJ ,  University of Maine System Board of Trustees

Inventor： Duncan Mayes ,  Janne Pynnonen ,  Christopher H. West ,  Douglas J. Gardner ,  Yousoo Han

IPC: C08L97/02 ,  B27K5/00 ,  B27N1/02 ,  B27N3/00 ,  C08L25/08 ,  B27N3/28

Abstract: The present invention is directed to a composite material comprising a cellulosic material, high impact polystyrene (HIPS) and styrene maleic anhydride (SMA). The cellulosic material may be thermally modified prior to being incorporated into the composite material. The present invention is also directed to a composite product that comprises the composite material according to the invention.