OLD NEWSPAPER(ONP) ADD OLD CORRUGATED CONTAINER(OCC) AND IN-SITU PRECIPITATED CALCIUM CARBONATE(PCC) MIXED PULP UPGRADE METHOD

摘要

PURPOSE: A method for improving the quality by adding ONP(Old Newspaper) and OCC(Old Corrugated Container) in-situ PCC(Precipitated Calcium Carbonate) mixture pulp is provided to synthesize PCC in a pulp slurry. CONSTITUTION: A method for improving the quality by adding ONP and OCC(Old Corrugated Container) in-situ PCC(Precipitated Calcium Carbonate) mixture pulp comprises a step of mixing OCC pulp and ONP pulp; and applying PCC by an in-situ method. The ratio of the OCC pulp and ONP pulp is 50:50. [Reference numerals] (AA) Quicklime CaO; (BB) Optimal PCC synthesis condition for paper; (CC) Slaked lime Ca(OH)_2; (DD) Introducing waste paper pulp slurry; (EE) Mixing upper level pulp; (FF) Papermaking process; (GG) Intensity improvement by the increase of fiber bond