Borealis Ag

Antonios Gitsas

Per-Ola Hagstrand

Thomas Gkourmpis

Christian Müller

Mattias Andersson

Villgot Englund

Ulf Nilsson

Hermann Braun

Dietrich Gloger

Davide Tranchida

Franciscus Jacobs

Wolfram Stadlbauer

Markus Gahleitner

Jingbo Wang

Pauli Leskinen

Annika Smedberg

Martina Sandholzer

Johanna Lilja

Virginie Eriksson

Thomas Horill

Johan Andersson

Jonna Hynynen

Karl Nielsen

Georgios Floudas

Christos Politidis

Christian MÜLLER

Matthew Parkinson

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 invention provides a polymer composition comprising a) a low density polyethylene (LDPE); and b) a conjugated aromatic polymer. The invention also relates to cables comprising said polymer composition and the use of the polymer composition in the manufacture of an insulation layer of cable.

Polymer composition for wire and cable applications with advantageous thermomechanical behaviour and electrical properties

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 cable having one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order. The insulation layer has at least 90 wt % of a polymer composition, said polymer composition having 80.0 to 99.9 wt % of an LDPE homopolymer or copolymer; and 0.1 to 20.0 wt % of: an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000; or a single site catalysed medium density polyethylene (MDPE) having a density of 925 to 940 kg/mor a single site catalysed linear low density polyethylene (LLDPE) having a density of 910 to 925 kg/m.

Cable with advantageous electrical properties

A cable comprising a conductor surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked or is cross-linked and comprises at least 90 wt % of a polymer composition, said polymer composition comprising: (I) 95.5 to 99.9 wt % of an LDPE; and (II) 0.1 to 4.5 wt % of an HDPE having a density of at least 940 kg/m.

Cable with improved electrical properties

The present invention is directed to a new heterophasic propylene copolymer (RAHECO), a process for obtaining said heterophasic propylene copolymer (RAHECO) and a film or a cable insulation comprising the heterophasic propylene copolymer (RAHECO).

Soft polypropylene composition

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Linz, Austria

Antonios Gitsas