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    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE
    14.
    发明申请
    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE 审中-公开

    公开(公告)号：WO2019123191A1

    公开(公告)日：2019-06-27

    申请号：PCT/IB2018/060159

    申请日：2018-12-17

    Applicant: STORA ENSO OYJ

    Inventor： BACKFOLK, Kaj ,  HEISKANEN, Isto ,  SAUKKONEN, Esa ,  LYYTIKÄINEN, Katja

    IPC: C08L1/02 ,  C08J5/18 ,  D21H11/18 ,  D21H17/28 ,  D21H17/32

    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.

    FILM COMPRISING MICROFIBRILLATED CELLULOSE AND PRODUCTS MADE THEREFROM
    17.
    发明申请
    FILM COMPRISING MICROFIBRILLATED CELLULOSE AND PRODUCTS MADE THEREFROM 审中-公开

    公开(公告)号：WO2017187350A3

    公开(公告)日：2017-11-02

    申请号：PCT/IB2017/052390

    申请日：2017-04-26

    Applicant: STORA ENSO OYJ

    Inventor： BACKFOLK, Kaj ,  HEISKANEN, Isto ,  SAUKKONEN, Esa ,  KANKKUNEN, Jukka

    IPC: D21H19/10

    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.

    A METHOD OF PRODUCING OXIDIZED OR MICROFIBRILLATED CELLULOSE
    20.
    发明申请
    A METHOD OF PRODUCING OXIDIZED OR MICROFIBRILLATED CELLULOSE 审中-公开
    生产氧化或微晶纤维素的方法

    公开(公告)号：WO2015007953A1

    公开(公告)日：2015-01-22

    申请号：PCT/FI2014/050572

    申请日：2014-07-11

    Applicant: STORA ENSO OYJ

    Inventor： HILTUNEN, Jaakko ,  HEISKANEN, Isto ,  SAXELL, Heidi ,  KAHELIN, Jukka ,  SAHARINEN, Erkki

    IPC: D21H11/20 ,  C08B15/02 ,  C08B15/04 ,  C08B15/08 ,  C08L1/02 ,  D21C9/00 ,  D21H11/18

    CPC classification number: D21H11/20 ,  C08B15/02 ,  D21C9/00 ,  D21C9/004 ,  D21C9/005 ,  D21H11/18

    Abstract: The invention relates to a method of producing oxidized or microfibrillated cellulose (MFC). According to the invention there is provided an aqueous pulp suspension with a consistency of at least 15 %, and at least one oxidant is added to the suspension to oxidize cellulosic hydroxyl groups in the suspension under mechanical mixing or shearing. The oxidized suspension, washed and diluted to a lower consistency, is subjected to homogenization to yield gel-like MFC. Alkali hypochlorite may be used as oxidant, and preferred mediating oxidation catalysts are AZADO and TEMPO. Alkali bromide may be used as a cocatalyst. The MFC product, which as a suspension has an increased viscosity, is suitable as a means of regulating viscosity or for production of films and composites.

    Abstract translation: 本发明涉及一种生产氧化或微纤化纤维素（MFC）的方法。 根据本发明，提供了至少15％的稠度的水性纸浆悬浮液，并且在悬浮液中加入至少一种氧化剂以在机械混合或剪切下氧化悬浮液中的纤维素羟基。 将氧化悬浮液洗涤并稀释至较低浓度，进行均化，得到凝胶状MFC。 碱性次氯酸盐可以用作氧化剂，优选的介质氧化催化剂是AZADO和TEMPO。 碱性溴化物可用作助催化剂。 作为悬浮液具有增加的粘度的MFC产品适合作为调节粘度或用于生产膜和复合材料的手段。

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