Borealis Ag

Borealis Technology Oy

Wolfram Stadlbauer

Hermann Braun

Dietrich Gloger

Davide Tranchida

Wilfried T Blauhut

Antonios Gitsas

Franciscus Jacobs

Wolfgang Penz

Manfred Lehner

Ernst Zopf

Klaus Bernreitner

Wolfgang Stockreiter

Luca Boragno

Erwin Kastner

Sanna Martin

Tiina Suikkanen

Herman Prokschi

Wilfried Blauhut

Peter Huber

The present invention is directed to a biaxially oriented polypropylene (BOPP) film with improved breakdown strength and to a capacitor comprising an insulation film comprising a layer of the biaxially oriented polypropylene film of the present invention. The present invention is further directed to a process for producing a biaxially oriented polypropylene film. Finally, the present invention is further directed to the use of a biaxially oriented polypropylene film of the present invention as layer of an insulation film of a capacitor. The BOPP film comprises a polypropylene composition, wherein the polypropylene composition comprises a high isotactic homopolymer of propylene and a polymeric α-nucleating agent. The BOPP film has a dielectric breakdown field strength Eb63.2 of at least 595 kV/mm. The process for producing a biaxially oriented polypropylene film comprises the steps of extruding a polypropylene composition to a flat film and orienting the flat film simultaneously in the machine direction and in the transverse direction.

Biaxially oriented polypropylene film with improved breakdown strength

The present invention is biaxially oriented film comprising a layer comprising a propylene polymer composition comprising a high isotactic homopolymer of propylene and a polymeric &#x3b1;-nucleating agent. The composition may also comprise other propylene polymers.

Biaxially oriented films made of propylene polymer compositions

A propylene copolymer composition which comprises &#x2014;a random copolymer of propylene (A), &#x2014;a random copolymer of propylene (B), and &#x2014;optional additive(s), suitable for pressure pipe applications.

Propylene copolymer composition

A method and apparatus for heating fiber reinforced thermoplastics in sheet form in contact heating means, in which the thermoplastic is heated between bands in the space between two heating means which can be pressed against it and is at the same time held between an upper and a lower sheet-like or filament-shaped restraining means, which is respectively arranged between the thermoplastic and the band. After heating up, the thermoplastic is taken out of the heating zone together with the restraining means and bands, the bands firstly being detached from the thermoplastic, while the restraining means continue to bear against the thermoplastic, and subsequently the restraining means are detached from the thermoplastic.

Method and apparatus for heating fiber reinforced thermoplastics by

Glass matt reinforced thermoplastics suitable for the production of paintable parts, comprising

Glass matt reinforced thermoplastics suitable for the production of

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Kefermarkt, Austria

Wolfram Stadlbauer