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公开(公告)号：US10113270B2
公开(公告)日：2018-10-30
申请号：US14760381
申请日：2014-01-09
申请人： BASF SE
发明人： Christopher Alan Gray , Antonius Moormann-Schmitz , Hubert Meixner , Luis Miguel Sanchez Cerro , Thomas Muehlenbernd , Christian Jehn-Rendu
IPC分类号： D21H17/44 , D21H17/68 , D21H21/18 , D21H17/56 , D21H21/10 , D21H17/37 , D21H17/00 , D21H11/20 , D21H17/45 , D21H17/55 , D21H23/04 , D21H23/18
摘要： 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.
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公开(公告)号：US09567710B2
公开(公告)日：2017-02-14
申请号：US14453282
申请日：2014-08-06
申请人： BASF SE
摘要： A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth) acrylamide and (b) between 30 and 99 mole % (meth) acryloyloxyethyltrimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.
摘要翻译： 本发明的方法提供了脱水纸浆的改进的排水时间和固体含量。
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公开(公告)号：US09404223B2
公开(公告)日：2016-08-02
申请号：US14373174
申请日：2013-01-31
申请人： BASF SE
发明人： Christopher Alan Gray , Antonius Moormann-Schmitz , Hubert Meixner , Luis Miguel Sanchez Cerro , Christian Jehn-Rendu , Thomas Muehlenbernd
IPC分类号： D21H17/44 , D21H17/45 , D21H21/10 , D21H17/37 , D21H27/30 , D21H17/00 , D21H17/36 , D21H17/56 , D21H23/26
摘要： 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.
摘要翻译： 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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公开(公告)号：US20140367059A1
公开(公告)日：2014-12-18
申请号：US14373174
申请日：2013-01-31
申请人： BASF SE
发明人： Christopher Alan Gray , Antonius Moormann-Schmitz , Hubert Meixner , Luis Miguel Sanchez Cerro , Christian Jehn-Rendu , Thomas Muehlenbernd
摘要： 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.
摘要翻译： 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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