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公开(公告)号:US6132558A
公开(公告)日:2000-10-17
申请号:US147486
申请日:1999-01-08
申请人: Rainer Dyllick-Brenzinger , Hubert Meixner , Friedrich Linhart , Dietmar Monch , Klaus-Dieter Gerber , Bernd Dirks , Peter Baumann
发明人: Rainer Dyllick-Brenzinger , Hubert Meixner , Friedrich Linhart , Dietmar Monch , Klaus-Dieter Gerber , Bernd Dirks , Peter Baumann
CPC分类号: D21H23/14 , D21H17/29 , D21H17/375 , D21H17/455 , D21H17/56 , D21H17/68
摘要: Paper and cardboard are produced by draining pulps, with sheet formation and drying of the sheets, by a process in which first(a) polyethyleneimines having a molar mass M.sub.w of more than 500,000 or polymers containing vinylamine units and having a molar mass of from 5000 to 3 million and then(b) cationic polyacrylamides or polymers containing vinylamine units, the molar masses M.sub.w of the polymers each being at least 4 million,are added to the pulps, and the pulp is then subjected to at least one shearing stage and is flocculated by adding bentonite, colloidal silica or clay.
摘要翻译: PCT No.PCT / EP97 / 03574 Sec。 371日期1999年1月8日第 102(e)1999年1月8日PCT PCT 1997年7月7日PCT公布。 第WO98 / 01623号公报 日期1998年1月15日纸和纸板是通过排出纸浆而制成的,其中片材形成和干燥,首先(a)摩尔质量Mw大于500,000的聚乙烯亚胺或含有乙烯胺单元的聚合物, 摩尔质量为5000至300万,然后(b)阳离子聚丙烯酰胺或含有乙烯胺单元的聚合物,各聚合物的摩尔质量Mw至少为400万,然后至少对纸浆进行处理 一个剪切阶段,并通过加入膨润土,胶体二氧化硅或粘土絮凝。