POLYMER BASED COMPOSITE SUITABLE FOR BOTH LASER MARKING AND PRINTING BY DYE DIFFUSION THERMAL TRANSFER PRINTING

摘要

Disclosed is a polymer based composite, comprising (a) a polyamide component, (b) a (co) -polyamide based on ether units and amide units, and (c) carbon black. Also provided herein is the finding that (1) the (co) -polyamide (b) offers sufficient absorbency for the printing ink, and (2) the selection of the polyamide component and the (co) -polyamide and the amount of the carbon black result in both sufficient transparency and sufficient absorption centers for the laser energy. Also disclosed are the use of, and the moulded article made of the polymer based composite, and a layered structure comprising at least one layer made of the polymer based composite and a security and/or valuable document comprising the layered structure.