a composite film material usable in a data carrier card body includes a first outer plastic layer , an inner plastic layer and a second outer plastic layer , all the layers together forming a co - extruded composite . the plastic material of the first outer layer is a polyethylene terephthalate glycol copolymer or contains a petg , the plastic material of the inner layer is a thermoplastic elastomer or containes a tpc , and the plastic material of the second outer layer is a petg or contains a petg .