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    • 2. 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。
    • 4. 发明授权
    • Method of producing high dry strength paper and cardboard and paper and cardboard thus obtained
    • 生产高强度纸和纸板以及纸和纸板的方法
    • US07972478B2
    • 2011-07-05
    • US11813955
    • 2006-01-11
    • René HundChristian Jehn-RenduFabrice Moretton
    • René HundChristian Jehn-RenduFabrice Moretton
    • D21H15/00
    • 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)聚合物上的溶液中的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。