METHOD FOR MANUFACTURING PLATES OF WOODY FIBER Russian patent published in 1997 - IPC

FIELD: manufacturing of heat insulation and decorative plates. SUBSTANCE: method involves preliminary processing of woody fiber till fraction 0.5-3 mm is prepared. Then portion of said fraction is mixed with water till moisture content is 84-95 %. The process is followed by wet grinding to prepare suspension having residue on 0.25-screen is 0.01-0.1 %. Then 36-58 mas. % of suspension (as calculated for dry material) is mixed with 0.1-60 mas. % of woody fiber being preliminary treated and with 0.1-35 mas.% of origin woody fiber. Thus prepared mixture is affected by formation under pressure 0.05-3 MPa. Density is 170-400 kg/m³, its strength is 0.2-1.0 MPa. EFFECT: improved efficiency. 1 tbl