CABLE COMPRISING A FOAMED LAYER COMPRISING A POLYOLEFIN POLYMER AND A BLOWING AGENT
The invention relates to a cable comprising at least one layer which comprises a foamable polyolefin polymer composition comprising a polyolefin polymer composition and blowing agent wherein the blowing agent comprises more than 90 wt % of citric acid or a derivate of citric acid.
1 . A cable comprising at least one layer which comprises a foamable polyolefin polymer composition comprising a:
a. a polyolefin polymer, and
b. a blowing agent
wherein the blowing agent comprises more than 90 wt % of citric acid or derivate of citric acid.
2 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition wherein the foamable polyolefin polymer composition is free from hydrazide, or azodicarbonamide.
3 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , comprising:
c. a nucleating agent.
4 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein the nucleating agent comprises a mineral nucleating agent.
5 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein the foamable polyolefin polymer composition comprises at least an LDPE.
6 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein the foamable polyolefin polymer composition comprises at least an HDPE.
7 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein the foamable polyolefin polymer composition comprises 5 to 80 wt of the LDPE and 20 to 95 wt % of HDPE.
8 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein the amount of blowing agent master batch is from 0.1 wt % to 10 wt % of the foamable polyolefin polymer composition.
9 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein the amount of stabilizers is from 0.01 wt % to 10 wt % of the foamable polyolefin polymer composition.
10 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein the foamable polyolefin polymer composition is foamed.
11 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein said layer is an insulation layer.
12 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein said layer is an insulation layer and said cable is a communication cable.
13 . The cable comprising at least one layer which comprises the foamable polyolefin polymer composition according to claim 1 , wherein said layer is an insulation layer and said cable is a data communication cable.
14 . Process for extruding the foamable polyolefin polymer composition according to claim 1 , wherein the polymer melt has an extrusion temperature of 200 to 260° C.
15 . (canceled)