METHOD OF ARAMIDE PAPER MAKING Russian patent published in 1995 - IPC

FIELD: paper industry. SUBSTANCE: paper pulp has additionally the waste of noncalandered aramide paper with density 0.1-0.4 g/cm ant thickness 0.05-2.50 mm. Paper pulp has the following components, wt.-% fibrides made of polymetaphenyleneisophthalamide 5.0-87.5; cut synthetic fiber 12-85, and the waste of noncalandered aramide paper 0.5-10.0. In the process of paper pulp preparing the waste of noncalandered paper is subjected for primary breaking up in paper hydropulper at the suspension mass part 0.2-3.2 for 20-60 min followed by the further breaking up and milling by the sequence passing prepared suspension through the entschtiper (the gap between milling members is 1.5-2.5 mm) and through a single or a few entschtipers (the gap is 0.2-0.5 mm) or a single or a few conical or disk mills at the specific consumption of useful energy 100-1500 kJ/kg. EFFECT: improved method of paper making. 1 tbl