METHOD FOR PRODUCTION PAPER WHICH IS USED AS A BASE FOR PROTECTIVE FILM OF FINISHING MATERIALS Russian patent published in 1996 - IPC

FIELD: paper production. SUBSTANCE: cellulose is ground to 18-23 degrees according to Schopper-Riegler. Into thus prepared mass polyamide aminoepichlorhydrine resin is added, its quantity being 0.5-1.0 % of mass of absolutely dried cellulose. Mixture of whitened sulfate leaf cellulose (content of α--cellulose in it being 80-87 %) with whitened sulfate coniferous cellulose (content of α-cellulose in it being 85-91 %) at their ratio 1:9-1.5:1 is used as mentioned above cellulose. Also mixture of said whitened sulfate leaf cellulose and unwhitened sulfate coniferous cellulose at their ratio 1:9-2:1 or unwhitened sulfate coniferous cellulose itself may be used as mentioned above cellulose. EFFECT: increases strength of desired product, decreases brittleness of protective film being manufactured on its base. 2 cl, 1 tbl