METHOD FOR PRODUCTION OF PACKING MATERIAL COATED WITH AT LEAST ONE BARRIER LAYER FOR HYDROPHOBIC COMPOUNDS Russian patent published in 2017 - IPC C09D129/04 C08K5/00 C08K5/07 C08K5/92 B32B29/00 B65D65/42 

FIELD: packaging industry.

SUBSTANCE: invention relates to a method of production of packing material with coating (10), which includes at least the following stages: a) obtaining substrate (12), which includes main material (14) from cellulose, outer side (16) turned from the product, which is been packed, as well as inner side (18) turned to the product been packed; b) coating inner side (18) of the substrate with at least one layer of an aqueous composition, which includes at least polyvinyl alcohol and a cross-linking agent and has the maximum content of solid substances of 25wt%: c) drying the layer and cross-linking the polyvinyl alcohol with the help of the cross-linking agent to form barrier layer (22a, 22b) for hydrophobic compounds. Also described is packaging material (10), where barrier layer (22a, 22b) contains a cross-linked polyvinyl alcohol arranged on inner side (18) of main material (14).

EFFECT: technical result is preventing migration of hydrophobic hydrocarbons through the packing material according to measurement by gas chromatography by more than 99 %, and therefore for mineral oil it is always lower than 0,6 mg/kg of a packed food product.

22 cl, 1 dwg, 1 tbl, 10 ex