METHOD OF INTRODUCING FILLER IN AERODYNAMIC PAPER FORMING Russian patent published in 2017 - IPC D21F11/00 D21H17/25 D21H17/28 D21H19/06 D21H23/40 D21H27/22 

FIELD: printing industry.

SUBSTANCE: paper with a single-sided coated layer is used in the manufacture, for example, of posters and labels. In the method for coating air-conditioning paper, comprising moistening the cellulosic semi-finished product with water to a moisture content of 48-50%, separating the semi-finished product prior to the formation of a fiber aerosolize, and then obtaining a fibrous layer that is wetted between two cloths aqueous starch solution, followed by pressing and drying the paper web, Chalk with a particle size of 4.5-5.5 mcm with an aqueous solution of sodium carboxymethylcellulose are sprayed onto one of the surfaces of the formed fibrous layer from the calculation and 10-40 grams of chalk/m² before moistening, which is carried out with an aqueous solution of starch with a concentration of 0.9-1.1%. One-sided deposition of the product of the interaction of chalk with an aqueous solution of sodium carboxymethyl cellulose on the surface of the fibrous layer is possible in the technology of aerodynamic paper forming. Depending on the weight of the fibrous layer and the roughness of the fibers, the through interfiber pores of the formed fibrous layer have a linear dimension smaller than the diameter of the particles of the chalk treated with aqueous sodium carboxymethylcellulose, which allows keeping the chalk particles on the surface of the fibrous layer. Sputtering of the product of the interaction of chalk with an aqueous solution of sodium carboxymethyl cellulose on the surface is carried out for a hardwood semi-finished product with a mass of the fibrous layer not less than 40 g/m², For coniferous semi-finished products with a mass of fibrous layer not less than 60 g/m².

EFFECT: increase the optical and print properties of paper.

2 cl, 3 tbl, 14ex