Method for printing on a portable data medium, particularly...

G - Physics – 03 – C

Patent

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Details

G03C 5/56 (2006.01) B41M 3/14 (2006.01) B41M 5/28 (2006.01)

Patent

CA 2268786

A method for printing on an exposed polymerised thermoplastic or curable layer of the body of a portable data medium, and a portable data medium, particularly a chip card, comprising a polymerised layer, are disclosed. The method comprises the steps of mixing a polymerisable thermoplastic or curable binder and at least one light-sensitive compound responsive to laser radiation having a predetermined wavelength in such a way that it changes from a first state to a second coloured state, in order to form a mixture; exposing the mixture to the laser radiation having a predetermined wavelength; and polymerising the mixture to form the polymerised layer of the body of the data medium. The method is particularly suitable for printing on smart cards.

L'invention concerne un procédé d'impression d'une couche polymérisée thermoplastique ou durcissable apparente d'un corps de support d'information portable ainsi qu'un support d'information portable, notamment carte à puce, comportant une couche polymérisée. Le procédé de l'invention se caractérise en ce qu'il comporte des étapes suivantes: de mélange d'un liant polymérisable thermoplastique ou durcissable, et d'au moins un composé photochromique sensible à un rayonnement laser de longueur d'onde donnée de manière à passer d'un premier état à un second état coloré, en vue de former un mélange; d'irradiation du mélange par le rayonnement laser de longueur d'onde donnée; de fixation du second état coloré; et, de polymérisation du mélange de manière à former la couche polymérisée du corps de support. L'invention s'applique, en particulier, à l'impression de cartes à mémoire.

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