Freeness imporvement of recycled fibers using enzymes with refining

摘要

As recycled fiber use and content has increased in paper and board manufacture,the need to imorve the drainage rte on th pper machine while maintainign mechanicla propeites through refinign has become omroe imotnat.htis work is focused on the applciation of an enzyme (Pergalase A40) to blended colored ledger (BCL),verying hte level of refinign,point of addition of he enzyme,and enzyme dose fro applciation in the manufacture of board from 100