METHOD FOR REMOVING FOREIGN MATERIAL IN PRODUCTION OF WASTE PAPER PULP, METHOD FOR PRODUCING WASTE PAPER PULP AND PRINTING PAPER

摘要

PPROBLEM TO BE SOLVED: To remove an hot-meltable foreign material such as a hot-melt adhesive without lowering an ink releasable performance. PSOLUTION: The method for removing the foreign material in production of the waste paper pulp comprises a disintegration step 1 for disintegrating unsorted waste paper under conditions of 46C, 5-25 wt.% pulp concentration and 10-30 min treating time to provide a fiber suspension and a foreign material-removing step for separating and removing the foreign material from the fiber suspension at 40C. PCOPYRIGHT: (C)2004,JPO