COATING STRUCTURE, SHEET-LIKE PRODUCT AND ITS APPLICATION Russian patent published in 2021 - IPC D21H27/10 D21H19/40 D21H19/56 D21H19/58 D21H19/82 B65D65/42 

FIELD: packaging.

SUBSTANCE: invention relates to a coating structure for a sheet-like substrate, including lignocellulose fibers, and its use for the manufacture of food packaging. The structure includes at least one primer layer and an upper coating layer. The primer layer contains 74.5-99 wt.% of the first styrene–(meth)acrylate copolymer that is polymerized in the presence of a stabilizer and that has a glass transition temperature Tg ≤20°C; 0.1-25 wt.% of particles of an inorganic lamellar mineral; and 0.01-2 wt.% of the first thickener. The upper coating layer includes at least 50 wt.% of the second styrene–(meth)acrylate copolymer that is polymerized in the presence of a stabilizer and that has a glass transition temperature Tg ≤20°C; ≤30 wt.% of inorganic mineral particles; 0.01-5 wt.% of the second thickener; and 0.5-30 wt.% of anti-adhesive.

EFFECT: invention provides good barrier properties against the penetration of fat and water vapor, as well as resistance against cracking when bending and/or folding.

18 cl, 16 dwg, 16 tbl, 9 ex