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    A method of producing microfibrillated cellulose
    21.
    发明专利
    A method of producing microfibrillated cellulose 未知

    公开(公告)号：FI127682B

    公开(公告)日：2018-12-14

    申请号：FI20135016

    申请日：2013-01-04

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  KASTINEN HENRI ,  KAUPPI ANNA ,  KANKKUNEN JUKKA ,  AXRUP LARS ,  LAND HENSDAL CECILIA ,  SAXELL HEIDI ,  BACKFOLK KAJ

    IPC: D21D1/20 ,  C08B15/08 ,  D21B1/04 ,  D21C9/00 ,  D21C9/18 ,  D21H11/18 ,  D21H17/00

    Abstract: The invention relates to methods of producing microfibrillated cellulose (MFC). According to the invention a fibrous pulp suspension is fibrillated mechanically at a consistency of less than 12.5 %, dewatered to raise the consistency of the fibrillated suspension to at least 12.5 %, and then subjected in the dewatered condition to further fibrillation. Alternatively an initially fibrillated fibrous pulp suspension may be dewatered and fibrillated in the dewatered condition, after which these dewatering and fibrillating steps are repeated one or more times so that pulp consistency is increased for each fibrillation step. The goals of raising the consistency between subsequent fibrillations are energy saving and an increased aspect ratio in MFC. The invention even comprises uses of the MFC product, e.g. as an additive for papermaking furnish or injection molded plastic composites.

    A method for manufacturing microfibrillated polysaccharide
    25.
    发明专利
    A method for manufacturing microfibrillated polysaccharide 未知

    公开(公告)号：AU2015338731A1

    公开(公告)日：2017-05-18

    申请号：AU2015338731

    申请日：2015-10-26

    Applicant: STORA ENSO OYJ

    Inventor： AXRUP LARS ,  KASTINEN HENRI

    IPC: D21C9/00 ,  C08B1/00 ,  C08B15/00 ,  C12P1/00 ,  C12P19/00 ,  D21H11/18 ,  D21H11/20 ,  D21H15/02

    Abstract: The present invention relates to a method for manufacturing microfibrillated polysaccharide, preferably microfibrillated cellulose. The invention also relates to microfibrillated cellulose obtainable by the method and use of the microfibrillated cellulose. The method of manufacturing microfibrillated cellulose comprises the following steps: a) Providing a hemicellulose containing pulp, b) Providing wood degrading enzymes c) Mixing pulp and enzymes d) Keeping the mixture in a continuous, flowing system of essentially cylindrical geometry (for example in a plug-flow reactor), e) Conveying the mixture to one or more mixing zones for recirculating and homogenizing the mixture, and f) Harvesting microfibrillated cellulose with a relatively narrow size distribution during the recirculation.

    METHOD AND INTERMEDIATE FOR THE PRODUCTION OF HIGHLY REFINED OR MICROFIBRILLATED CELLULOSE
    29.
    发明专利
    METHOD AND INTERMEDIATE FOR THE PRODUCTION OF HIGHLY REFINED OR MICROFIBRILLATED CELLULOSE 未知

    公开(公告)号：CA2881332A1

    公开(公告)日：2014-02-27

    申请号：CA2881332

    申请日：2013-08-16

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  LAND HENSDAL CECILIA ,  AXRUP LARS ,  SAXELL HEIDI

    IPC: D21H11/18 ,  C08L1/02 ,  D21B1/34 ,  D21B1/38 ,  D21C9/00 ,  D21C9/18

    Abstract: The invention concerns a method for the production of highly refined or micro- fibrillated 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 me- chanical means to obtain the final product. The invention further concerns dried cellulosic pulp as an intermediate product of the method, having an aver- age 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.

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