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    A METHOD OF CONTROLLING RETENTION AND AN INTERMEDIATE PRODUCT USED IN THE METHOD
    11.
    发明专利
    A METHOD OF CONTROLLING RETENTION AND AN INTERMEDIATE PRODUCT USED IN THE METHOD 未知

    公开(公告)号：CA2848241C

    公开(公告)日：2021-06-22

    申请号：CA2848241

    申请日：2012-09-12

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  LAITINEN RISTO ,  RASANEN JARI

    IPC: D21H21/10 ,  D21H17/17 ,  D21H17/25 ,  D21H17/28 ,  D21H17/29 ,  D21H21/18 ,  D21H21/52

    Abstract: The invention provides a method of controlling retention on a forming fabric in a paper making process, an intermediate product for use in the method, as well as use of material for the intermediate product. For making the intermediate product at least one paper making chemical is added to a slurry of fine cellulose fibres such as micro fibrillated cellulose (MFC), the specific surface area of those fibres being larger than that of the fibres of the main fibrous suspension for paper making, causing the paper making chemical being adsorbed on the fine cellulose fibres. This intermediate product is then incorporated in the main fibrous suspension before the suspension is supplied from the paper machine head box to the forming fabric. Other paper making chemicals may be added to the fibrous suspension before or after addition of the intermediate product, so that interactions between different chemicals are prevented. The invention permits an increased retention in general as well as improved control of retention of paper making chemicals separately and/or in relation to each other.

    PACKAGING BOARD, ITS USE AND PRODUCTS MADE THEREOF
    12.
    发明专利
    PACKAGING BOARD, ITS USE AND PRODUCTS MADE THEREOF 未知

    公开(公告)号：CA2851385C

    公开(公告)日：2019-09-10

    申请号：CA2851385

    申请日：2012-10-09

    Applicant: STORA ENSO OYJ

    Inventor： RASANEN JARI ,  HEISKANEN ISTO ,  LAITINEN RISTO

    IPC: D21H21/16 ,  D21H17/15 ,  D21H17/17 ,  D21H17/56 ,  D21H21/20

    Abstract: The invention relates to a packaging board comprising a fibrous base and one or more polymer coating layers on one or both sides of the fibrous base. According to the invention the fibrous base contains the combination of an alkyl ketene dimer size, stearic acid anhydride, a wet-strength size and an aluminium com- pound, which give the board resistance to aggressive liquids as well as thermal treatment, particularly an improved resistance to raw edge penetration in such circumstances. The invention further relates to containers and packages made of the board, for instance disposable drinking cups, dairy product cartons and auto- clave packages, as well as use of the board for such purposes.

    Un método de control de la retención y un producto intermedio usado en el método
    13.
    发明专利
    Un método de control de la retención y un producto intermedio usado en el método 未知

    公开(公告)号：ES2613140T3

    公开(公告)日：2017-05-22

    申请号：ES12832281

    申请日：2012-09-12

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  LAITINEN RISTO ,  RÄSÄNEN JARI

    IPC: D21H21/10 ,  D21H17/17 ,  D21H17/25 ,  D21H17/28 ,  D21H17/29 ,  D21H21/18 ,  D21H21/52

    Abstract: Un método de control de la retención en un tejido en formación en un procedimiento de fabricación de papel, comprendiendo dicho método al menos las siguientes etapas: - Proporcionar una suspensión fibrosa para la fabricación de papel; - Proporcionar una lechada que comprende fibras de celulosa finas, siendo el área superficial específica de dichas fibras de celulosa finas mayor que las de las fibras de dicha suspensión fibrosa; - Añadir al menos un compuesto químico de fabricación de papel a dicha lechada, siendo dicho compuesto químico de fabricación de papel una cola hidrófoba tal como AKD o ASA, que se adsorbe en dichas fibras de celulosa finas para formar un producto intermedio; - Incorporar dicho producto intermedio en dicha suspensión fibrosa para la fabricación de papel; y - Suministrar dicha suspensión fibrosa que incluye dicho producto intermedio en el tejido en formación.

    TREATMENT OF THERMALLY MODIFIED WOOD
    16.
    发明专利
    TREATMENT OF THERMALLY MODIFIED WOOD 未知

    公开(公告)号：CA2533114C

    公开(公告)日：2012-11-20

    申请号：CA2533114

    申请日：2004-07-23

    Applicant: STORA ENSO OYJ

    Inventor： LAITINEN RISTO ,  KANKKUNEN MIKA ,  LINDELL HENRY ,  LEHTOVUORI JUKKA ,  SILEN JOUKO ,  PANKALAINEN SAKU

    IPC: B27K3/36 ,  B27K20060101 ,  B27K5/00

    Abstract: The invention relates to treatment of thermally modified wood. Thermal modification means controlled heating treatment of wood most appropriately under moist atmosphere so as to improve the dimensional stability and decay resistance of the wood. In accordance with the invention, the water absorption tendency of themally modified wood is reduced by treating the wood with a hydrophobic sizing agent reactive with cellulose, the treatment resulting in water-repellent wood. The wood can be treated with a solution containing a sizing agent, and then the solvent is evaporated by drying. Suitable sizing agents comprise alkyl ketene dimers (AKD) and alkenyl succinic acid anhydrides (ASA) dissolved in acetone, for instance. When ASA is used, the dried wood impregnated with the sizing agent requires an additional heating treatment in order to become hydrophobic.

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