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公开(公告)号：US11578463B2
公开(公告)日：2023-02-14
申请号：US16628565
申请日：2018-07-02
Applicant: Stora Enso Oyj , Wetend Technologies Oy
Inventor： Esa Saukkonen , Isto Heiskanen , Kaj Backfolk , Jouni Matula , Jussi Matula
Abstract: A method of dosing a nanocellulose suspension in gel phase into a second suspension, wherein the method comprises the steps of: providing said nanocellulose suspension in gel phase; providing said second suspension; bringing said nanocellulose suspension in gel phase in contact with said second suspension; wherein the method comprises a step of subjecting said nanocellulose suspension in gel phase to a shear rate of more than 500 l/s, simultaneously with and/or immediately prior to the step of bringing said nanocellulose suspension in gel phase and said second suspension in contact with each other.
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32.发明授权公开(公告)号：US11479915B2
公开(公告)日：2022-10-25
申请号：US16316864
申请日：2017-07-03
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen , Katja Lyytikäinen , Heidi Saxell
Abstract: The present invention relates to a method for manufacturing an intermediate product that can be stored and transported and efficiently converted into microfibrillated cellulose with limited energy input at the time of conversion. More specifically, the invention involves the use of dewatered carboxymethylcellulose or carboxylated cellulose fiber having a low degree of substitution and a high amount of additives.
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公开(公告)号：US11459432B2
公开(公告)日：2022-10-04
申请号：US16461897
申请日：2017-11-16
Applicant: Stora Enso OYJ
Inventor： Isto Heiskanen , Kaj Backfolk , Esa Saukkonen , Ville Ribu , Katja Lyytikäinen
IPC: C08J5/18 , D21H11/18 , D21H25/04 , D21H19/34 , D21H13/00 , D21H21/18 , D21H19/52 , D21H21/16 , D21H17/28
Abstract: Method for making a film that comprises microfibrillated cellulose, wherein the film has low OTR values and especially suitable for a tropical environment. The method comprising the steps of providing a suspension comprising microfibrillated cellulose (MFC), forming a film from said suspension, wherein the film having a solid content above 40%, preferably above 50%, treating the film with flame or plasma treatment, such that a surface activation takes place on the film, and cooling the film, wherein the surface of the film having a decreased OTR value and a high moisture resistance.
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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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Patent Agency Ranking
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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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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