FIBER SHEETING MAINLY FOR CORRUGATING AND PACKAGING MADE OF IT Russian patent published in 2009 - IPC D21F11/12 

FIELD: textile, paper.

SUBSTANCE: invention relates to pulp and paper industry, precisely to paper for corrugating as well as packaging made by using it. Fiber sheeting contains waste paper in quantity 35-75 wt % and softwood pulp - 25-65 wt % with 60-65 % yield of cellulose fiber at the degree of pulp cooking 75-95 units of Kappa. Cellulose is prepared by modified Mg-bisulfite pulp cooking of the mixture containing pine and fir chips, the ratio of fir is not less than 30 wt %. Corrugated board is prepared by gluing corrugated and plane layers of paper with said composition. Packaging, for example corrugated boxes, are made of corrugated board usually having three or five layers. High content of resinous matters ensures required blotting capacity without applying sizing compounds.

EFFECT: fiber sheeting and packaging produced by using it have high strength and stiffening properties.

3 cl, 1 tbl, 5 ex