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...
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creator | BARLA, P ANDERSSON, K.R YRJANS, J |
description | 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. |
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subjects | 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 |
title | PAPERMAKING PROCESS USING CATIONIC POLYACRYLAMIDE AND SOL OF COLLOIDAL PARTICLES AS DRAINAGE AND RETENTION IMPROVING AGENT |
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