公开(公告)号：US4980025A

公开(公告)日：1990-12-25

申请号：US380737

申请日：1989-07-17

申请人： Kjell R. Andersson ,  Pavol Barla ,  Johnny Yrjans

发明人： Kjell R. Andersson ,  Pavol Barla ,  Johnny Yrjans

IPC分类号： D21H21/10 ,  D21H17/34 ,  D21H17/37 ,  D21H17/45 ,  D21H17/67 ,  D21H17/68

CPC分类号： D21H17/68 ,  D21H17/375 ,  D21H17/455

摘要： In a process for making paper from an aqueous paper pulp, especially a pulp containing bleached/unbleached mechanical pulps or unbleached chemical pulps, a combination of chemicals is added for improving drainage and retention. As drainage-and retention-improving aids are added a cationic polyacrylamide and a sol of colloidal inorganic particles having at least one surface layer of aluminium silicate or aluminum-modified silicic acid.

摘要翻译： 在从含水纸浆，特别是含有漂白/未漂白的机械纸浆或未漂白化学纸浆的纸浆中制造纸张的方法中，添加化学品的组合以改善排水和保留。 作为排水和保留改进助剂，添加阳离子聚丙烯酰胺和具有至少一个硅酸铝表面层或铝改性硅酸的胶态无机颗粒溶胶。