Process for treating paper machine stock containing bleached hardwood pulp with an enzyme mixture to reduce vessel element picking

摘要

The process uses a mixture of cellulases and xylanases to chemically change the hardwood vessel elements, rendering them susceptible to breaking under normal mill refining, thus not requiring any additional refining equipment. The process involves treating bleached hardwood brownstock pulp with the cellulase/xylanase mixture. The use of a pure cellulase enzyme is excluded.