Bayer Materialscience Ag

Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Mehmet-Cengiz Yesildag

Heinz Pudleiner

Klaus Meyer

Serguei Kostromine

Rainer Hagen

Rafael Oser

Harald Kraus

Georgios Tziovaras

Dirk Pophusen

Chung Leung Wong

Joachim Petzoldt

Joerg Nickel

Jörg Büchner

Michael Knebel

Jens Ehreke

Joerg Buechner

Per Krüger

Reinhard Löwe

Bernd Post

The present invention relates to a layer structure having improved properties for laser engraving, to particular embodiments of said layer structures in the form of co-extrusion films, and to security documents, preferably identification documents having said layer structures.

Layered structure and films for ID documents having improved properties for laser engraving

The invention relates to a special layer construction and a special film of plastic for the production of such a layer construction which is suitable for printing by means of dye diffusion thermal transfer printing, a process for the production thereof and a security and/or valuable document comprising such a layer construction.

Plastic film for printing by dye diffusion thermal transfer printing

The invention relates to a transparent thermoplastic material, containing 0.0001 to 2 wt. % of substantially flat metal identification platelets with a largest length elongation of less than 200 &#x3bc;m and a thickness of 2-10 &#x3bc;m, a round or n-angled shape where n&#x2267;4, wherein the metal identification platelets do not have any recesses or have recesses that lie substantially in the center of the metal identification platelet, do not come closer than 20 &#x3bc;m to the circumferential outer edge of the metal identification platelet, and do not account for more than 30% of the surface area of the metal identification platelet. The invention also relates to the production thereof and the use for producing films for personalization of a card layer composite and data carriers in card form, especially smart cards, magnetic strip cards, identification cards and the like.

Thermoplastic comprising metal identification platelets

The invention relates to layer structures for ID cards on which information can be written by laser engraving and which have an additional layer that is applied to the card body after the laser engraving and restricts or completely prevents subsequent writing on the card by means of laser engraving, and consequently prevents falsification of the identifying information contained, and relates to a method for blocking the laser engraving writability of layer structures on which information can be written by laser engraving.

ID cards with blocked laser engraving writability

Latent-reactively glued TPU/PC layer materials

The invention relates to a security and/or valuable document containing a scratch-resistant coating obtained from a lacquer composition comprising

Security and/or valuable documents with a top layer with a scratch-resistant finish

Growing community of inventors

Leverkusen, Germany

Mehmet-Cengiz Yesildag