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：US20210017671A1

公开(公告)日：2021-01-21

申请号：US16955910

申请日：2018-12-20

Applicant: Stora Enso OYJ

Inventor： Gisela Cunha ,  Heidi Saxell

IPC: D01F2/30 ,  D01D5/00 ,  D01D5/04 ,  D04H3/015 ,  D01D5/06 ,  C08B5/00 ,  D03D15/00 ,  A61L15/28

Abstract: A method is provided for preparing a fibrous material (preferably a mat or filaments) of crosslinked microfibrillated cellulose. Phosphorylated microfibrillated cellulose is spun into a fibrous material; and then said fibrous material is post-treated (e.g. by heat-treatment) to provide crosslinking between the phosphorylated microfibrillated cellulose. Fibrous materials such as filaments or mats, and hygiene products comprising such materials are also described.

公开(公告)号：US20210016520A1

公开(公告)日：2021-01-21

申请号：US16955903

申请日：2018-12-12

Applicant: Stora Enso OYJ

Inventor： Duncan Mayes ,  Janne Pynnönen ,  Antti Korpela

IPC: B29C70/12 ,  B29B7/00 ,  B29B7/92 ,  B29C48/285 ,  B29C48/29 ,  B29C48/91 ,  B29C48/92 ,  B29C48/94 ,  C08J5/04 ,  C08K5/00 ,  C08K5/092

Abstract: The present invention relates to an improved process for manufacturing an extruded composite product comprising natural fibers and a thermoplastic polymer. According to the present invention, mixing as well as crosslinking takes place inside an extruder. The natural fibers may be provided for example in the form of pulp or wood particles.

公开(公告)号：US10857753B2

公开(公告)日：2020-12-08

申请号：US15889250

申请日：2018-02-06

Applicant: STORA ENSO OYJ

Inventor： Tapani Penttinen ,  Kimmo Nevalainen ,  Jurkka Kuusipalo ,  Tapio Koskinen ,  Sami Kotkamo

IPC: A61F13/15 ,  B05D3/00 ,  B29C53/00 ,  B29C65/00 ,  B31C11/04 ,  B31C7/00 ,  B32B37/00 ,  B32B27/00 ,  B65C9/25 ,  C08J5/00 ,  C08J7/18 ,  G21H5/00 ,  B31B50/64 ,  B29C65/02 ,  B29C71/04 ,  B32B9/02 ,  B32B27/12 ,  C08J5/12 ,  C08J7/12 ,  C09J5/06 ,  B32B7/12 ,  B32B27/08 ,  B32B27/10 ,  B32B27/36 ,  B31B50/74 ,  B29C65/10 ,  B29C65/18 ,  B29C35/08 ,  B29K67/00

Abstract: A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.

公开(公告)号：US20200340183A1

公开(公告)日：2020-10-29

申请号：US16955916

申请日：2018-12-20

Applicant: Stora Enso OYJ

Inventor： Gisela Cunha ,  Heidi Saxell

IPC: D21H11/20 ,  D21H11/18 ,  D21C9/00 ,  D21H27/00 ,  A61L15/28

Abstract: A method is provided for preparing a film of crosslinked microfibrillated cellulose. Phosphorylated microfibrillated cellulose is cast or wet-laid into a film; and then said film is post-treated (e.g. by heat-treatment) to provide crosslinking between the phosphorylated microfibrillated cellulose. Films and hygiene products comprising such films are also described.

公开(公告)号：US20200339783A1

公开(公告)日：2020-10-29

申请号：US16955921

申请日：2018-12-20

Applicant: Stora Enso OYJ

Inventor： Gisela Cunha ,  Heidi Saxell

IPC: C08L1/02 ,  D21H11/18 ,  D21H11/20 ,  D21C9/00 ,  C08J5/24 ,  C07C45/30 ,  D04H3/015 ,  D01F2/24

Abstract: A method is provided for preparing a fibrous material of crosslinked microfibrillated cellulose. Dialdehyde microfibrillated cellulose is spun into a fibrous material; said fibrous material is pre- or post-treated (by reduction of pH) to provide crosslinking between the dialdehyde microfibrillated cellulose. Fibrous materials such as filaments or mats, and polymer composites comprising such materials are also described.

公开(公告)号：US20200332468A1

公开(公告)日：2020-10-22

申请号：US16643060

申请日：2018-08-30

Applicant: Stora Enso OYJ

Inventor： Tuomo Sippus

IPC: D21H11/18 ,  C08L1/02 ,  D21F11/12 ,  B32B29/00 ,  B32B29/08 ,  B32B7/12 ,  D21D1/20

Abstract: The present invention relates to a method for producing a paperboard comprising the steps of; providing a furnish comprising cellulosic fibers, applying the furnish on at least one wire to form a web, dewatering the web on said at least one wire by subjecting the web to a pressure above 150 kPa without the use of a press roll nip and thereafter pressing the dewatered web to form a paperboard. The invention also relates to a paperboard and a corrugated board.

公开(公告)号：US20200308768A1

公开(公告)日：2020-10-01

申请号：US16076197

申请日：2017-02-06

Applicant: Stora Enso OYJ

Inventor： Jari Räsänen ,  Mari Hiltunen ,  Ali Harlin ,  Hanna Koskela ,  Christiane Laine ,  Laura Kela

IPC: D21F11/00 ,  C08J9/16 ,  B31F1/00 ,  B65D1/34 ,  C08J9/228 ,  D21H21/22 ,  D21H21/56

Abstract: The invention concerns a method of manufacturing paper or board, the paper or board obtained by the method, and a method of producing a tray from the board. In a fibrous stock for papermaking is incorporated an amount of polymer coated fibrous particles, which even have a foaming agent such as moisture contained therein. A web is formed from the fibrous stock on a forming fabric of a paper or board machine, followed by pressing and drying to a finished paper or board. As the paper or board is sufficiently heated the foaming agent within the particles evaporates, causing expansion and foaming of the polymer coating, which adds to malleability of the board as it is moulded into a shaped article such as a board tray. The invention even covers production of doubly coated fibrous particles for use in said methods, the inner coating layer being of a foamable polymer with a higher melt flow rate and the outer coating layer being of a non-foaming polymer of a lower melt flow rate.