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    • 6. 发明申请
    • Method of Producing High Dry Strength Paper and Cardboard and Paper and Cardboard Thus Obtained
    • 生产高强度纸和纸板,纸和纸板的方法如此获得
    • US20080196851A1
    • 2008-08-21
    • US11813955
    • 2006-01-11
    • Rene HundChristian Jehn-RenduFabrice Moretton
    • Rene HundChristian Jehn-RenduFabrice Moretton
    • D21H17/33
    • C08F220/56C08F8/00C08F226/02D21H17/42D21H17/45D21H21/18C08F20/00
    • In a method of producing a sheet of paper and/or cardboard and similar products, prior to the formation of the sheet from a fibrous suspension, at least two dry strength agents are added to the suspension either separately in any order or mixed together and at one or more injection points, namely: a first agent corresponding to a product for Hofmann degradation in solution on a base (co)polymer comprising at least one non-ionic monomer which is selected from the group containing acrylamide and/or methacrylamide, N,N dimethylacrlamide and/or acrylonitrile; and a second agent corresponding to a (co)polymer having an anionic charge density greater than 0.1 meq/g. The Hofmann degradation product comprises an organic polymer produced at a concentration greater than 3.5% by weight, and preferably greater than 4.5% and the first and second agents are each introduced into the pulp suspension at a concentration of between 0.01 and 2% by weight of active polymer material in relation to the dry weight of the pulp suspension.
    • 在制造纸张和/或纸板和类似产品的方法中,在从纤维悬浮液形成片材之前,将至少两种干强度剂以任何顺序分开加入悬浮液中或混合在一起并在 一个或多个注射点,即:对应于在包含至少一种非离子单体的基础(共)聚合物上的溶液中霍夫曼降解的产物的第一试剂,其选自含有丙烯酰胺和/或甲基丙烯酰胺的N, N二甲基丙烯酰胺和/或丙烯腈; 和对应于阴离子电荷密度大于0.1meq / g的(共)聚合物的第二试剂。 霍夫曼降解产物包含以大于3.5重量%,优选大于4.5重量%的浓度制备的有机聚合物,并且将第一和第二试剂以0.01至2重量%的浓度引入纸浆悬浮液中 活性聚合物材料相对于纸浆悬浮液的干重。
    • 7. 发明授权
    • Manufacture of paper and paperboard
    • 纸和纸板的制造
    • US09103071B2
    • 2015-08-11
    • US14125401
    • 2012-06-20
    • Christian Jehn-Rendu
    • Christian Jehn-Rendu
    • D21H21/10D21H17/37D21H17/44
    • D21H17/37D21H17/44D21H21/10
    • The present invention relates to a process of making paper or paperboard, the process including introducing a dual retention system into a cellulosic thin stock, subjecting the cellulosic thin stock to one or more shear stages, and then draining the cellulosic thin stock on a moving screen to form a dried sheet, wherein the dual retention system consists of a first polymeric retention aid and a second polymeric retention aid, the first polymeric retention aid is a water-soluble cationic polymer exhibiting an intrinsic viscosity of at least 6 dl/g, the second polymeric retention aid is a water-soluble cationic polymer exhibiting an intrinsic viscosity of from 4 to 9 dl/g, and the second polymeric retention aid has a greater cationic charge density than the first polymeric retention aid.
    • 本发明涉及一种制造纸或纸板的方法,该方法包括将双重保留系统引入纤维素薄的原料中,使纤维素薄料经受一个或多个剪切阶段,然后将纤维素薄原料排出移动筛网 形成干燥的片材,其中双重保留体系由第一聚合物助留剂和第二聚合物助留剂组成,第一聚合物助留剂是表现出至少6dl / g的特性粘度的水溶性阳离子聚合物, 第二聚合物助留剂是显示特性粘度为4至9dl / g的水溶性阳离子聚合物,并且第二聚合物助留剂具有比第一聚合物助留剂更大的阳离子电荷密度。
    • 8. 发明申请
    • MANUFACTURE OF PAPER AND PAPERBOARD
    • 纸和纸板的制造
    • US20140124155A1
    • 2014-05-08
    • US14125401
    • 2012-06-20
    • Christian Jehn-Rendu
    • Christian Jehn-Rendu
    • D21H17/37
    • D21H17/37D21H17/44D21H21/10
    • The process of the present invention concerns manufacturing paper and paperboard employing two polymeric retention aids. These two polymeric retention aids should be added to the low consistency suspension, often referred to as the thin stock. The first polymeric retention aid is a water-soluble cationic polymer exhibiting an intrinsic viscosity of at least 6 dl/g. The second polymeric retention aid is a water-soluble cationic polymer exhibiting an intrinsic viscosity of between 4 and 9 dl/g. The cationic charge density of the second polymeric retention aid should be higher than that of the first polymeric retention aid. The process is particularly suitable for the manufacture of fine paper or multiply packaging paper which often contains filler.
    • 本发明的方法涉及使用两种聚合物助留剂制造纸和纸板。 这两种聚合物助留剂应加入到低稠度悬浮液中,通常称为稀浆。 第一聚合物助留剂是表现出至少6dl / g的特性粘度的水溶性阳离子聚合物。 第二聚合助留剂是特性粘度在4至9dl / g之间的水溶性阳离子聚合物。 第二聚合物助留剂的阳离子电荷密度应高于第一聚合物助留剂的阳离子电荷密度。 该方法特别适用于制造通常含有填料的高级纸或多重包装纸。