METHOD OF MAKING POLYCARBONATE LAMINATE COMPOSITE Russian patent published in 2013 - IPC B32B27/36 B42D15/00 B42D15/10 

FIELD: process engineering.

SUBSTANCE: invention relates to fabrication of laminate composite to be used for making documents and/or securities protected against counterfeit Composite has at least first polymer layer and second polymer layer. Both are made of polycarbonate polymer based on bisphenol A. Interlayer is arranged between said first and second polymer layers. Proposed method comprises the following stages: a) interlayer is applied on at least the part of first polymer layer, b) optionally, interlayer is dried, c) first layer on surface with interlayer is coated with a layer of liquid composition. Sid liquid composition comprises solvent or mix of solvents and polycarbonate derivate on the basis of heminal di-substituted dihydroxy-diphenyl cycloalkan. Said composition covers said interlayer. Then proceed the following stages d) optionally, after step c) follows drying step, e) after step c) or step d) first polymer layer is coated with second polymer layer that covers interlayer, f) first polymer layer and second polymer layer at pressure, temperature of 120-230°C for aforesaid layers to be laminated for preset time interval.

EFFECT: higher integrity and durability.

19 cl, 6 dwg, 3 tbl, 8 ex