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公开(公告)号：US20230131438A1
公开(公告)日：2023-04-27
申请号：US17996940
申请日：2021-05-06
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Katja Lyytikäinen
Abstract: The present invention is directed to a coated paper substrate that is particularly suitable for metallization and other nano-coatings that provide barrier properties and are applied using vacuum deposition techniques. The invention is also directed to a process for preparing the coated paper substrate. The invention is also directed to a packaging material comprising the coated paper substrate.
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公开(公告)号：US20230016725A1
公开(公告)日：2023-01-19
申请号：US17756983
申请日：2020-12-15
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen
Abstract: The present invention relates to a foam formed solid composite, comprising: a matrix phase consisting of a mixture of nanocellulose, at least one foaming agent, and optional additives, and a dispersed phase consisting of solid low-density particles having a density of less than 1.2 kg/dm3. The present invention further relates to a method and a liquid foam composition for manufacturing the solid composite.
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公开(公告)号：US20220363871A1
公开(公告)日：2022-11-17
申请号：US17597317
申请日：2020-06-30
Applicant: Stora Enso OYJ
Inventor： Ulla Jansson , Anders Moberg , Kaj Backfolk
Abstract: The present invention relates to a refined cellulose fiber composition useful as a strength enhancing agent for paper and paperboard, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-98 as determined by standard ISO 5267-1, and wherein the refined cellulose fiber composition has a content of fibers having a length >0.2 mm of at least 12 million fibers per gram based on dry weight. The invention further relates to a method for preparing the refined cellulose fiber composition and to pulp paper and paperboard comprising the refined cellulose fiber composition.
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公开(公告)号：US20220340735A1
公开(公告)日：2022-10-27
申请号：US17753798
申请日：2020-09-15
Applicant: Stora Enso OYJ
Inventor： Cecilia Land Hensdal , Venkata Prabhakar Soudham , Kaj Backfolk
Abstract: The present invention is directed to a film or coating comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said film or coating also comprising at least 1% by weight of extractives from wood bark or cork wood. The invention is also directed to products, such as packaging materials, using or incorporating said film or coating. Such packaging materials are for example laminates or multi-layer structures. The films or coatings according to the present invention having advantageous barrier properties and are therefore particularly suitable for sensitive objects that need to be packaged in a controlled or modified atmosphere. The present invention is also directed to a composition comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said composition also comprising at least 1% by weight of extractives from wood bark or cork wood. The composition is useful for example in the preparation of the film or coating.
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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
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.
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Patent Agency Ranking
公开(公告)号：US20220242636A1
公开(公告)日：2022-08-04
申请号：US17597218
申请日：2020-06-30
Applicant: Stora Enso OYJ
Inventor： Susanne Hansson , Raija Bådenlid , Kaj Backfolk
IPC: B65D65/42 , B32B29/00 , B32B29/06 , D21H11/18 , D21H27/30 , C08L1/02 , C08L5/14 , C08L29/04 , D21H21/16
Abstract: The present invention relates to a paper or paperboard substrate having barrier properties, which substrate comprises a single or multiply structure with e.g. a top ply, a middle ply and a bottom ply, wherein at least one of said top ply and said bottom ply is provided with a high-density bio-barrier layer, and wherein said top or bottom ply provided with the high-density bio-barrier layer and said top or bottom ply not provided with the high-density bio-barrier layer have both been subjected to grafting with a fatty acid halide.
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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.
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公开(公告)号：US20220010492A1
公开(公告)日：2022-01-13
申请号：US17293587
申请日：2019-10-29
Applicant: Stora Enso OYJ
Inventor： Nina Miikki , Kaj Backfolk
Abstract: A surface treatment composition comprising nanocellulose—such as microfibrillated cellulose (MFC)—and particles is provided. The particles comprise a supporting material and an active material comprising a salt of a multivalent metal. Various products comprising such a surface treatment composition and methods using said compositions are also provided.
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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
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.
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20.发明申请公开(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.
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