Method for producing a film composite material and a card body
AssigneeGiesecke & Devrient GmbH
InventorsJosef Riedl, Andreas Braun
Life of this patent
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Abstract
A method for producing a foil composite material, in particular for use as a layer in a card body, preferably in a card body of a portable data carrier, whereby using a coextrusion process, at least a first plastic melt of plastic including a thermoplastic elastomer and at least a second plastic melt of plastic without a thermoplastic elastomer, are joined in such a fashion that a foil composite material is formed. This foil composite material contains one or several outer first layers of plastic without a thermoplastic elastomer, one or several middle second layers of plastic including a thermoplastic elastomer and one or several outer third layers of plastic without a thermoplastic elastomer.
Claims10
-11. (canceled)
A method for producing a foil composite material, comprising the steps:
- using a coextrusion process, joining at least a first plastic melt of plastic comprising thermoplastic elastomer and at least a second plastic melt of plastic without thermoplastic elastomer to form a foil composite material comprising one or several outer first layers of plastic without thermoplastic elastomer, one or several middle second layers of plastic comprising a thermoplastic elastomer on urethane basis and one or several outer third layers of plastic without thermoplastic elastomer;
- at least one of said one or several outer first and third layers comprising polycarbonate, polyester, copolyester, a blend of polyesters or a blend of polycarbonate with one or several polyesters.
The method according to claim 2, wherein the coextrusion process is carried out at a mass temperature of 200° C. or higher.
Dependencies are inferred from the claim text.