MULTILAYER STRUCTURE THAT MAKES SUBSTRATE FOR PRINTING THEREON AND METHOD OF ITS FABRICATION Russian patent published in 2010 - IPC B32B27/10 B32B27/34 B32B29/00 B32B37/30 B42D15/00 D21H21/42 

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer substrate 60 and method to produce a counterfeit-protected paper. Proposed substrate consists of the first paper interlayer (10, 202) with density varying from 10 to 80 g/m² and second paper interlayer (20, 214) with density varying from 10 to 80 g/m², and one layer of plastic made from thermosetting polymer materials arranged between aforesaid interlayers (10, 20, 202, 214) and bound therewith. Proposed method consists in that plastic layer, as-melted, is introduced between said paper interlayers (10, 20, 202, 214) for them to be squeezed between two rolls (50) in continuous process. Said two rolls 50 are kept at temperature exceeding room temperature but lower than that plastic material melt. Paper interlayers and plastic layer are bound together due to atomic-molecular forces between said layers to produce penetration zone wherein plastic layers are bound with fibrous material of aforesaid interlayers (10, 20, 202, 214). Plastic layer density varies from 22 to 80 g/m².

EFFECT: better counterfeit protection, longer life.

38 cl, 5 ex, 3 tbl, 4 dwg