| 摘要 |
The invention relates to a composite film material (4), in particular for use as a layer in a card body, preferably in a card body of a portable data carrier, comprising at least one first outer plastic layer (1), at least one inner plastic layer (3) and at least one second outer plastic layer (2), all the layers (1, 3, 2) together forming a co-extruded composite, characterised in that the plastic material of the at least one first outer layer (1) is a thermoplastic polymer or a mixture of thermoplastic polymers, the plastic material of the at least one inner layer (3) is a mixture of at least one thermoplastic elastomer and at least one thermoplastic polymer, and the plastic material of the at least one second outer layer (2) is a thermoplastic polymer or a mixture of thermoplastic polymers. The invention also relates to a method for producing the composite film material and to a card body (5) which comprises the composite film material (4) as at least one layer in the layered composite thereof, and to a method for producing the card body (5). |
