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：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：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

IPC: D21C9/00 ,  D21H11/18 ,  C04B16/02 ,  C08B15/08

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.

公开(公告)号：US20210054570A1

公开(公告)日：2021-02-25

申请号：US16966527

申请日：2019-01-31

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Jukka Kankkunen ,  Anna Nyberg Zetterlund ,  Jan Lif

IPC: D21H23/28 ,  D21H11/18 ,  D21H19/40 ,  D21H23/48 ,  D21H23/52 ,  D21H23/50 ,  D21H19/66

Abstract: The present invention relates to a process for manufacturing a film comprising high amounts of microfibrillated cellulose (MFC), having haptic properties. According to the present invention, a wet web comprising MFC is formed, followed by addition of particles having an average diameter of at least 1 μm to the wet web, followed by dewatering and/or drying. The wet web may be formed for example by wet laid or cast forming methods. The particles may be added to the wet web for example by cast coating or spraying.

公开(公告)号：US10900169B2

公开(公告)日：2021-01-26

申请号：US14421708

申请日：2013-08-16

Applicant: STORA ENSO OYJ

Inventor： Isto Heiskanen ,  Cecilia Land Hensdal ,  Lars Axrup ,  Heidi Saxell

IPC: D21C9/00 ,  D21H11/18 ,  D21C5/00 ,  D21C9/18 ,  C08L1/02 ,  C12P19/04 ,  C12P19/14 ,  D21H17/00 ,  D21H17/67

Abstract: A method for the production of highly refined or microfibrillated cellulose (MFC), comprising the steps of treating cellulosic fibres to remove at least a major part of the primary wall of the fibres, drying the treated fibres, rewetting the treated fibres, and disintegrating the wetted fibres by mechanical means to obtain the final product. Dried cellulosic pulp is produced as an intermediate product of the method, having an average fibre length of at least 0.4 mm, while less than 50% of the primary wall material of natural untreated fibres is left in the intermediate product. Instead of transporting large amounts of dilute MFC dispersion the invention enables transport of the dry intermediate product to the MFC end user, who would complete the process by turning the intermediate product to final MFC by use of standard disintegrating devices.

公开(公告)号：US20210017717A1

公开(公告)日：2021-01-21

申请号：US16955900

申请日：2018-12-19

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Jukka Kankkunen

IPC: D21H27/10 ,  D21H11/18 ,  D21H19/22 ,  D21H19/80 ,  B32B27/12 ,  B32B27/32 ,  B29C65/32 ,  B29C65/36 ,  B29C65/00

Abstract: The present invention is directed to a packaging material free from aluminium in the form of a continuous foil or film, comprising a layer of microfibrillated cellulose (MFC), wherein the layer comprising MFC has been laminated or coated on at least one side with a heat-sealable material. The MFC layer contains at least 60% by weight of microfibrillated cellulose. The present invention is also directed to a method for induction sealing, wherein a packaging material to be heat-sealed by induction is placed against an induction heating surface.

公开(公告)号：US20200010629A1

公开(公告)日：2020-01-09

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：US20200008372A1

公开(公告)日：2020-01-09

申请号：US16489817

申请日：2018-02-27

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Elina Skerfe

IPC: A01G24/35 ,  A01G24/18 ,  A01G24/15 ,  A01G24/28 ,  A01G24/25 ,  A01G24/23

Abstract: The present invention is directed to a culture medium comprising a soilless substrate, microfibrillated cellulose and a hydrophilic or amphiphilic polymer. The present invention is particularly useful in soilless agriculture, such as for horticultural/agricultural use that is based on a soilless substrate such as mineral or glass wool. These types of culture media are often used in greenhouses but may also be used for outdoor horticulture or agriculture.