To provide a data carrier combining good mechanical, optical and thermal characteristics, while easily reusable and disposable through environmentally acceptable procedure.

The single layer or multilayer-type data carrier used for an identification card, a banking card, or the like is provided with at least one plastic layer which is constituted of a polyester not recrystallizable with heat, particularly non-recrystallizing polyethylene terephthalate, where an antiblocking agent is incorporated in at least partial area in the volume of the plastic layer.