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公开(公告)号：US20220298264A1
公开(公告)日：2022-09-22
申请号：US17299986
申请日：2019-12-04
Applicant: Stora Enso OYJ
Inventor： Isto Heiskanen , Mari Hiltunen , Nina Ruohoniemi , Titta Lammi , Ville Ribu , Tim Lindfors , Jari Räsänen
Abstract: The present invention relates to a web of fibrous cellulosic material derived from wood pulp, said web being suitable for three-dimensional moulding to form a packaging product, wherein the web comprises >40 wt % of soft wood chemical pulp and at least one strength enhancement agent, wherein the web has a grammage less than 400 g/m2, and wherein the cellulose fibers of said soft wood chemical pulp comprise a fiber curl of >9%.
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公开(公告)号：US11326306B2
公开(公告)日：2022-05-10
申请号：US16955470
申请日：2018-12-17
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen , Katja Lyytikäinen
IPC: D21H11/18 , B32B27/10 , B32B27/32 , D21F1/00 , D21H17/32 , D21H17/42 , D21H17/45 , D21H21/08 , D21H23/04
Abstract: A method for the production of a fibrous product from a fibrous web, wherein the method comprises the steps of: —providing a fibrous suspension comprising a microfibrillated cellulose, wherein the content of the microfibrillated cellulose of said suspension is in the range of 60 to 99.9 weight-% based on total dry solid content, —adding an uncharged, amphoteric or weakly cationic polymer having a molecular weight of at least 50000 g/mol to said suspension, —adding an anionic polymer having a molecular weight of at least 00000 g/mol to said suspension to provide a mixture of said microfibrillated cellulose, said uncharged, amphoteric or weakly cationic polymer and said anionic polymer, 1—providing said mixture to a substrate to form a fibrous web, wherein the amount of uncharged, amphoteric or weakly cationic polymer in said mixture is in the range of 0.1 to 20 kg/metric ton based on total dry solid content and wherein the amount of anionic polymer in said mixture is in the range of 0.01 to 10 kg/metric ton based on total dry 20 solid content; and—dewatering said fibrous web to form a fibrous product.
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公开(公告)号：US11319671B2
公开(公告)日：2022-05-03
申请号：US16080359
申请日：2017-03-30
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen , Katja Lyytikäinen
IPC: D21H11/18 , D21H17/68 , D21H17/37 , D21H17/28 , D21H17/55 , D21H21/10 , D21H27/38 , D21H17/44 , D21H17/29 , D21H21/52 , D21H17/24 , D21H27/10 , D21H17/13 , D21H21/50 , B82Y30/00
Abstract: The present invention relates to a new process for improving dewatering 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 polymer.
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84.发明申请公开(公告)号：US20220074140A1
公开(公告)日：2022-03-10
申请号：US17415878
申请日：2019-12-20
Applicant: Stora Enso OYJ
Inventor： Isto Heiskanen , Katja Lyytikäinen , Otto Nylén , Kaj Backfolk
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.
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公开(公告)号：US11242652B2
公开(公告)日：2022-02-08
申请号：US16075715
申请日：2017-02-17
Applicant: Stora Enso OYJ
Inventor： Isto Heiskanen , Esa Saukkonen
IPC: D21H15/00 , D21H11/18 , D21H11/16 , B65D65/38 , B65D85/10 , D21H17/35 , D21H17/67 , D21H17/68 , D21H19/10 , D21H15/02 , D21F11/02 , D21H21/28 , D21H27/10
Abstract: A sheet having dead-fold properties, wherein said sheet comprises cellulose fibers whereof at least 75%, preferably at least 90%, or more preferably at least 95% of said cellulose fibers have a fiber length of less than 1 mm, and wherein the tensile strength ratio (MD/CD) of the film is above 1.4, preferably higher than 1.6 and most preferably higher than 1.8.
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Patent Agency Ranking
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
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.
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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
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.
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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
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.
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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.
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公开(公告)号：US20210062418A1
公开(公告)日：2021-03-04
申请号：US16977159
申请日：2019-02-18
Applicant: Stora Enso OYJ
Inventor： Philip Håkansson , Kaj Backfolk , Isto Heiskanen
Abstract: The invention discloses a method to form a composition, which method includes fibrillating fibers to form MFC in the presence of an alkali-metal silicate whereby an MFC and silicate mixture is formed The presence of alkali-metal silicate during fibrillation of fibers to MFC, reduces the viscosity and increases the water release behavior, whereby the fibrillation can be accomplished at higher concentrations and a more uniform mixture of MFC-silicate is accomplished. The composition formed by the method of the invention may e.g. be used in paper or paperboard production, in cement production or as an additive in composites.
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