METHOD FOR PRODUCING PACKAGING MATERIAL AND PACKAGING MATERIAL PRODUCED WITH THIS METHOD Russian patent published in 2021 - IPC D21H19/82 D21H21/16 D21H27/10 B65D65/40 B65D65/42 

FIELD: packaging.

SUBSTANCE: invention relates to the production of heat-sealable packaging material. A method includes the stages of forming a cardboard substrate including an upper layer, applying the first dispersion barrier layer on the upper layer, and applying the second barrier layer on the first barrier layer. The first barrier layer includes latex having the first glass transition temperature equal to from ≥-10°C to ≤40°C, and the second barrier layer includes latex having the second glass transition temperature equal to from ≥10°C to ≤40°C. The grammage of the second barrier layer is lower than the grammage of the first barrier layer. The first barrier layer includes 0-40 wt.% of pigments, and the second barrier layer includes 30-70 wt.% of pigments per the total content of solid substance.

EFFECT: resistance to sticking of heat-sealable packaging material with preservation of barrier properties is ensured.

13 cl, 1 dwg, 4 tbl, 2 ex