Rohm Gmbh

Roehm Gmbh

Evonik Rohm Gmbh

Polyvantis Gmbh

Detlef Birth

Ghirmay Seyoum

Gunther Dickhaut

Michael Meier-Kaiser

Markus Parusel

Herbert Groothues

Christoph Krohmer

Claude Guenanten

Helmut Haering

Eric Reinheimer

Guenther Dickhaut

Wangelis Karampougioukis

Claude Guénanten

Girolamo Musci

Helmut Háring

Walter Meon

Christopher Neuroth

Helmut Häring

Christoph Steinfels

Haroldo Rodrigues

Juergen Pachmann

Günther Dickhaut

Max Conrad

Jurgen Pachmann

Helmut Haring

Jürgen Pachmann

Claude Guenaten

The present invention relates to peelproof security films made from a poly(meth)acrylate, more particularly from a polymethyl methacrylate, which comprises at most 10 wt % of or no impact modifiers. These films are highly transparent, have good printability qualities, and can be applied without intended break points. The peelproof security films can therefore find use in particular in documents, such as passports, for example, in security labels, such as road tax badges, for example, or for product theft prevention, or as price tags. These security labels are further distinguished by good weathering stability and in particular by especially good UV stability. The present invention relates more particularly to the use of these security labels, which have a thickness of not more than 2 mm, comprise at least 80 wt % of polymethyl methacrylate and contain no impact modification particles.

Permanent security film with high transparency and without predetermined breaking points

An extruded matt foil has at least one layer in which glass beads are uniformly distributed in a polymer matrix with at least one fluoropolymer and at least one further layer. The matt foil has a particularly high UV-resistance, a high weathering resistance and excellent mechanical properties. Therefore, the foil is highly suitable for surface-protection of materials such as polyvinyl chloride (PVC) and for use in high-pressure laminates (HPLs).

Extruded matt foil with improved mechanical properties and a high weathering resistance

The invention relates to a method for producing a thermoplastic plastic film. According to said method, the thermoplastic plastic is melted and transported in an extrusion installation comprising an extruder, an extrusion nozzle with a wide-slot delivery opening and a chill roll, which is fixed to a roll system and then leaves the delivery opening of the extrusion nozzle in the form of a flat melted web. Said melted web is then applied to the chill roll and is cooled. The invention is characterised in that it uses an extrusion installation, in which the distance between the delivery opening of the extrusion nozzle and the surface of the cooled roll does not vary by more than +/&#x2212;50 &#x3bc;m during the operating time. The invention also relates to a film of this type and to uses of the latter.

Method for producing a thermoplastic plastic film, film and use thereof

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Dieburg, Germany

Detlef Birth