SANDWICH PRODUCT PROTECTED AGAINST FORGERY, AND ITS PRODUCTION METHOD Russian patent published in 2014 - IPC D21H21/40 D21H17/33 B32B27/10 

FIELD: textile, paper.

SUBSTANCE: sandwich product protected against forgery includes sheets of paper with protective elements, which are saturated with a polymer binding agent, and external polymer layers. Sheets of paper are saturated in molten thermoreactive or thermoplastic polymer throughout the volume and surfaces of each sheet are coated with a polymer layer; besides, the product surfaces are of a relief type. A manufacturing method involves saturation of sheets of paper with protective elements with the molten thermoreactive or thermoplastic polymer, or with their mixtures, drying with partial polymerisation, assembly of a pack of saturated sheets, hot pressing lamination with simultaneous formation of surface relief and products of the specified geometrical shape.

EFFECT: producing substitutes of currency notes based on sandwich plastic materials containing protective elements and having high indices of stability to aggressive action and mechanical wear during operation.

8 cl, 2 ex