Patent ID: 9079443
Filing Date: 2015-07-14
Classification: B41M,Y10T

Abstract:
1. A laser-marked laminar structure, comprising: at least one laser marked thermoplastic polymer layer; and an outer layer, applied over the whole or part of a surface of the at least one laser-marked thermoplastic polymer layer, which prevents subsequent alteration by laser engraving of the at least one laser-marked thermoplastic polymer layer, the outer layer is comprised of a layer with at least one IR-absorbing additive, wherein the at least one laser-marked thermoplastic polymer contains at least one laser-sensitive additive, and wherein the laser-sensitive additive is carbon black, and wherein the at least one IR-absorbing additive is selected from the group consisting of azo, azomethine, methine, anthraquinone, indanthrone, pyranthrone, flavanthrone, benzanthrone, phthalocyanine, perylene, dioxazine, thioindigo isoindoline, isoindolinone, quinacridone, pyrollo pyrrole or quinophthalone pigments and metal complexes of azo, azomethine or methine dyes, and metal salts of azo compounds, wherein the thermoplastic polymer of the at least one laser-marked thermoplastic polymer layer is at least one thermoplastic polymer selected from polymers of ethylenically unsaturated monomers and/or polycondensates of bifunctional reactive compounds, or wherein the thermoplastic polymer of the at least one laser-marked thermoplastic polymer layer is at least one thermoplastic polymer selected from polymers of one or more polycarbonate(s) or copolycarbonate(s) based on diphenols, poly- or copolyacrylate(s) and poly- or copolymethacrylate(s), polymer(s) or copolymer(s) with styrene, polyurethane(s), and polyolefin(s), poly- or copolycondensate(s) of terephthalic acid, poly- or copolycondensates of naphthalenedicarboxylic acid, poly- or copolycondensate(s) of at least one cycloalkyl dicarboxylic acid, polysulfones or mixtures of thereof, or wherein the thermoplastic polymer of the at least one laser-marked thermoplastic polymer layer is at least one thermoplastic polymer selected from polymers of one or more polycarbonate(s) or copolycarbonate(s) based on diphenols or blends containing at least one polycarbonate or copolycarbonate.