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    PROCESS FOR THE MANUFACTURE OF PAPER AND PAPERBOARD
    1.
    发明申请
    PROCESS FOR THE MANUFACTURE OF PAPER AND PAPERBOARD 审中-公开
    纸和纸板的制造工艺

    公开(公告)号：WO2013113823A3

    公开(公告)日：2013-10-03

    申请号：PCT/EP2013051921

    申请日：2013-01-31

    Applicant: BASF SE

    Inventor： GRAY CHRISTOPHER ALAN ,  MOORMANN-SCHMITZ ANTONIUS ,  MEIXNER HUBERT ,  SANCHEZ CERRO LUIS MIGUEL ,  JEHN-RENDU CHRISTIAN ,  MUEHLENBERND THOMAS

    IPC: D21H21/10

    CPC classification number: D21H27/30 ,  D21H17/36 ,  D21H17/375 ,  D21H17/56 ,  D21H17/74 ,  D21H21/10 ,  D21H23/26

    Abstract: The present invention relates to a process of making paper or paperboard in which a cellulosic thin stock is provided and subjected to one or more shear stages and then drained and a moving screen to form a sheet which is dried, wherein the process employs a retention system which is applied to the thin stock, said retention system comprising as components i) a blend of different cationic polymers and ii) a microparticulate material, in which the blend of cationic polymers comprises, a) a cationic polymer having a charge density of at least 3 mEq per gram and a molar mass of greater than 700,000 Da, b) a cationic polymer having a charge density of below 3 mEq per gram and an intrinsic viscosity of at least 3 dl/g, wherein one of the components of the retention system is dosed into the thin stock after the final shearing stage and the other is dosed into the thin stock before the final shearing stage.

    Abstract translation: 制造纸或纸板的方法本发明涉及一种制造纸或纸板的方法，其中提供纤维素薄料并经受一个或多个剪切阶段，然后排干，并移动筛网以形成干燥的片材，其中该方法采用保留系统 所述保留系统包括作为组分的i）不同阳离子聚合物的共混物和ii）微粒材料，其中阳离子聚合物的共混物包含a）具有至少电荷密度的阳离子聚合物 3mEq /克，摩尔质量大于700,000Da，b）电荷密度低于3mEq /克，特性粘度至少为3dl / g的阳离子聚合物，其中保留体系中的一种成分 在最终的剪切阶段之后，被稀释到稀薄的坯料中，另一个在最终的剪切阶段之前被加入稀薄的原料中。

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