PAPERMAKING PROCESS USING CATIONIC POLYACRYLAMIDE AND SOL OF COLLOIDAL PARTICLES AS DRAINAGE AND RETENTION IMPROVING AGENT

PAPERMAKING PROCESS USING CATIONIC POLYACRYLAMIDE AND SOL OF COLLOIDAL PARTICLES AS DRAINAGE AND RETENTION IMPROVING AGENT

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 polyacryla...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BARLA, P, ANDERSSON, K.R, YRJANS, J
Format: Patent
Sprache:eng
Schlagworte:
IMPREGNATING OR COATING OF PAPER
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
TEXTILES
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung: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.