Borealis Ag

Borealis Gmbh

Åsa Wannerskog

Martin Anker

Ola Fagrell

Oscar Prieto

Ann Watson

Anna Hjärtfors

Anna Hjartfors

Anette Nilsson

Lars Efraimsson

The present invention concerns a foamable polymer composition and a foamed polymer composition obtained by foaming this foamable polymer composition. The invention is also concerned with a cable comprising at least one layer which comprises the foamable polymer composition or the foamed polymer composition. The invention further provides a process for producing a foamed polymer composition.

Foaming behaviour of polymer compositions using passive nucleation

The present invention relates to a cable jacket comprising a random heterophasic propylene copolymer, the random heterophasic polypropylene copolymer comprising a matrix (M) being a random propylene copolymer (R-PP) and dispersed therein an elastomeric propylene copolymer (E), wherein the random propylene copolymer (R-PP) comprises a first propylene copolymer fraction (R-PP1) having a comonomer content in the range of 0.8 to 6.0 mol % and a second propylene copolymer fraction (R-PP2) having a comonomer content in the range of 7.2 to 20.0 mol %, based on the overall amount of fractions (R-PP1) and (R-PP2), and wherein the random heterophasic propylene copolymer has MFR2 (230&#xb0; C.) measured according to ISO 1133 in the range of 0.5 to 15 g/10 min, and Charpy impact strength measured according to ISO 179-1/1eA at &#x2212;20&#xb0; C. in the range of 5 to 20 kJ/m. The present invention further relates to a power cable comprising the cable jacket.

Cable jacket

The present invention relates to a cable jacket comprising a random heterophasic propylene copolymer, wherein said copolymer comprises a matrix (M) being a random propylene copolymer (R-PP) and dispersed therein an elastomeric propylene copolymer (E), wherein the random propylene copolymer (R-PP) has a melt flow rate MFR2 (230&#xb0; C./2.16 kg) of 0.1 to 10.0 g/10 min and wherein the elastomeric propylene copolymer (E) has a comonomer content in the range of 40.0 to 55.0 mol %, and wherein said copolymer has MFR2 (230&#xb0; C.) in the range of from 0.5 to 15 g/10 min, flexural modulus below 400 MPa, and relaxation spectrum index (RSI) at 200&#xb0; C. below 20.0. The present invention further relates to a telecommunication cable comprising said jacket.

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Stenungsund, Sweden

Åsa Wannerskog