Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Covestro LLC

Stefan Janke

Heinz Pudleiner

Thomas Fäcke

Marc-Stephan Weiser

Klaus Meyer

Georgios Tziovaras

Kira Planken

Christoph Koehler

Roland Kuenzel

Ciro Piermatteo

Meng Feng

Yizhe Zhao

Daopeng Wang

Christoph Köhler

Christopher Cooper

The present invention relates to layer composites comprising at least one opaque layer a) and at least one transparent layer b), wherein the Vicat softening temperature B/120 determined according to ISO 306:2004 (method B120 50N; 120° C.) of layer a) is ≥156° C., preferably from ≥156° C. to ≤250° C., particularly preferably from ≥156° C. to ≤230° C., and wherein the Vicat softening temperature B/120 determined according to ISO 306:2004 (method B120 50N; 120° C./h), of layer a) is higher than that of layer b), a method for producing such layer composites and security documents, preferably identification documents, comprising such a layer structure.

Plastic films having high Vicat softening temperature in layered structures

The invention is related to a layered structure with at least one layer a. of a material with a VST≥85° C. comprising at least one cutting line b. reaching through the whole thickness of the layered structure surrounding at least one first portion which is extractable and reinsertable manually from the layered structure as well as a production process for such a layered structure.

Layered structures with cutting lines

The invention relates to a layer structure containing: (A) a first transparent radiation-engravable layer (A) with a first surface a) and a second surface a) which runs substantially parallel to the surface a), said first layer (A) having a colorful or black part-engraving, said engraving being generated by means of nonionizing electromagnetic radiation (E), on the first surface a) which forms a first outer surface of the layer structure; (B) optionally an additional transparent radiation-engravable layer (B) with a first surface b) facing towards the first layer (A) and another surface b) facing away from the first layer (A) and running substantially parallel to the surface b); and (C) optionally at least one additional transparent plastic layer (C), wherein the additional layer (C) is selectively provided in one of a group of options consisting of: on the face of the first surface a) of the layer (A), on the face of the additional surface b) of the additional layer (B), between the two layers (A) and (B), or, in the event of additional layers (C), a combination of at least two of said options, and an image of the colorful or black part-engraving is located on the surface of the layer structure in the form of a nontransparent structural modification forming an additional outer surface of the layer structure and lying opposite the first surface a). The invention likewise relates to the production of the layer structure as well as to a security document containing the layer structure according to the invention.

Layer structure with modified structure, and production thereof

The present invention relates to a layered structure containing at least one layer (i) comprising a thermoplastic material and at least one further layer (ii) comprising a thermoplastic material bearing at least one embossed hologram, to a process for producing such layer composites and to security documents, in particular identification documents, having the layered structure according to the invention.

Plastic films for ID documents with better lightness of embossed holograms

The present invention relates to an improved method for the partial colouring, in particular for the coloured laser engraving, of plastic parts, in particular thermoplastic plastic parts, more particularly thermoplastic plastic parts, comprising a layer structure, and to the resulting partially coloured, preferably coloured and laser engraved, plastic parts, in particular thermoplastic plastic parts.

Method for the partial colouring of plastic parts

The present invention relates to plastic films with improved laser engraving capability, chemical resistance and mechanical stress, special embodiments of such films in the form of co-extrusion films, layer structures comprising such films, use of such films, as well as security documents, preferably identification documents, containing such films.

Plastic films for ID documents having improved properties for laser engraving and improved chemical resistance

The present invention relates to a security document and/or document of value with a hologram in a visually changeable window as a novel security element, and also to a method for producing the same.

Growing community of inventors

Brüggen, Germany

Stefan Janke