Cable jacket

1. 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 MFR 2 (230° 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 30.0 to 65.0 mol %, and wherein said copolymer has MFR 2 (230° C.) in the range of 0.5 to 15 g/10 min, measured according to ISO 1133; flexural modulus below 400 MPa, measured according to ISO 178; and relaxation spectrum index (RSI) at 200° C. below 20.0.

2. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has a wear index measured according to ASTM D 4060 (BTM22549, abrasive wheel CS-17, 1000 g load) equal or below 10.0 mg/1000 cycles.

3. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has a Charpy impact strength measured according to ISO 179-1/1eA at −20° C. in the range of 5 to 20 kJ/m 2 .

4. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has a Charpy impact strength measured according to ISO 179-1/1eA at 0° C. in the range of 40 to 90 kJ/m 2 .

5. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has a relaxation spectrum index (RSI) at 200° C. below 18.

6. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has a relaxation spectrum index (RSI) at 200° C. above 5.

7. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has a flexural modulus measured according to ISO 178 above 200 MPa.

8. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has MFR 2 (230° C.) measured according to ISO 1133 in the range of 1 to 10 g/10 min.

9. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has Shore D (1s) measured according to ISO 868 in the range of 35 to 50.

10. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer constitutes at least 95 wt % of said cable jacket.

11. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer comprises as matrix a random ethylene propylene copolymer and dispersed therein an ethylene propylene rubber.

12. A cable comprising the cable jacket according to claim 1 .

13. The cable according to claim 12 , wherein said cable is a communication cable.

14. The cable according to claim 12 , wherein said cable is a fiber optic cable.

15. The fiber optic cable according to claim 14 , which comprises a core tube having transmission media disposed therein and the cable jacket disposed around the core tube.

16. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has Charpy impact strength measured according to ISO 179-1/1eA at 23° C. in the range of 40 to 90 kJ/m 2 .

17. The cable jacket according to claim 1 , wherein said random heterophasic propylene copolymer has a xylene cold soluble (XCS) fraction in the range of 20.0 to 60.0 wt %, measured according to ISO 16152 (25° C.).

18. The cable jacket according to claim 17 , wherein the xylene cold soluble fraction (XCS) has an intrinsic viscosity (IV) in the range of 1.0 to 3.0 dl/g, measured according to ISO 1628/1 (at 135° C. in decalin) and a comonomer content of below 45 mol %.

19. The cable jacket according to claim 17 , wherein the xylene cold soluble fraction (XCS) has an intrinsic viscosity (IV) in the range of 1.0 to 3.0 dl/g, measured according to ISO 1628/1 (at 135° C. in decalin).

20. The cable jacket according to claim 17 , wherein the xylene cold soluble fraction (XCS) has a comonomer content of below 45 mol %.