公开(公告)号：US20150345081A1

公开(公告)日：2015-12-03

申请号：US14760381

申请日：2014-01-09

Applicant: BASF SE

Inventor： Christopher Alan GRAY ,  Antonius MOORMANN-SCHMITZ ,  Hubert MEIXNER ,  Luis Miguel SANCHEZ CERRO ,  Thomas MUEHLENBERND ,  Christian JEHN-RENDU

IPC: D21H17/00 ,  D21H17/45 ,  D21H17/68 ,  D21H11/20

CPC classification number: D21H17/74 ,  D21H11/20 ,  D21H17/375 ,  D21H17/44 ,  D21H17/45 ,  D21H17/55 ,  D21H17/56 ,  D21H17/68 ,  D21H21/10 ,  D21H23/04 ,  D21H23/18

Abstract: Process for the Manufacture of Paper and Paperboard 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 from 0.5 and below 3 mEq per gram and a molar mass of greater than 700,000 Da, which cationic polymer is selected from polymers containing vinyl amine units and polyethylenimine, 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: 纸和纸板的制造方法技术领域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 其中所述方法采用应用于稀浆的保留系统，所述保留系统包含作为组分的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）阳离子 电荷密度为0.5〜3mEq / g，摩尔质量大于700,000Da的聚合物，该阳离子聚合物选自含有乙烯基胺单元和聚乙烯亚胺的聚合物，b）电荷密度低于3的阳离子聚合物 mEq /克，特性粘度至少为3dl / g，其中保留体系的组分之一在最终剪切阶段之后投入稀浆中 另一个在最终剪切阶段之前投入稀薄的原料。