saett foer framstaellning of paper by forming and dewatering aeger room in naervaro of a aluminiumfoerening, a cationic retention aids and a silicic acid polymer

摘要

A process for the production of paper by forming and dewatering a suspension of cellulose containing fibres, and optional fillers, on a wire. The forming and dewatering is carried out in the presence of a combination of an aluminum compound, a cationic retention agent and a polymeric silicic acid having a high specific surface area. The combination of substances improves dewatering and retention of fines and fillers.