Process for producing paper

摘要: The invention relates to a process for the production of paper by adding an aqueous fiber suspension, which possibly contains filler, auxiliary agents improving retention and/or dewatering, being cationic long-chain polyacrylamide and aluminum salt, dewatering obtained suspension during sheet-forming stage. According invention, said containing has first been added, is subjected shearing forces, whereafter there added it, directly before sheet forming, polymeric salt or in case base acid when necessary, so that pH be within range 7-9 hydroxy particles having anionic surface charges will formed situ.