PREPARATION OF FIBROUS PULP

摘要

PURPOSE: To continuously produce high-quality paper from recycled waste paper. CONSTITUTION: A wet friable pulp is produced by utilizing high consistency and low shearing pulp followed by a series of cleaning steps and the produced pulp is digested and optionally bleached. The obtained pulp is run on a paper machine alone or blended with virgin pulp to produce a paper containing >=5 wt.% recycled pulp and <=20 ppm per unit area solid non-fibrous contaminants having a projected area of >=0.3 mm<2> .