CORRUGATED CARDBOARD CONTAINING FLAT LAYER AND FLUTING, AND BOX FROM SUCH CARDBOARD Russian patent published in 2024 - IPC D21H27/40 D21F11/12 D21F11/02 

FIELD: paper.

SUBSTANCE: invention relates to corrugated cardboard containing liner (flat layer) and fluting, in which fluting is obtained from cellulose mass containing NSSC (neutral sulphite semi-chemical cellulose) mass, wherein the density of fluting according to ISO 534 is more than 725 kg/m³, the compression strength index (SCT) of the fluting according to ISO 9895 in the crosswise direction (CD) is more than 28 Nm/g, the geometric index SCT of fluting according to ISO 9895 is more than 37 Nm/d, wherein geometrical index SCT of fluting is equal to square root of product of index SCT of fluting in machine direction (MD) and index of SCT of fluting in crosswise direction (CD), and at least 70% in terms of weight of dry substance of cellulose pulp is NSSC mass.

EFFECT: implementation of the assignment.

13 cl, 11 dwg, 2 tbl