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Cable Sheathing Material "LSZH"

Dutch of the Elm
Hi,


I hope someone can assist. 


I am interested in studying the materials used to sheath "LSZH" / "LSF" cables, particularly ones such as twin and earth.  Can anyone confirm what kinds of compounds are typically used to sheath these cables?  Specifically LSF/LSZH ones, so not PVC.  I had assumed XLPE but a number of manufacturers seem to state "LSZH" sheath etc alongside XLPE insulation, so I am lead to understand the sheath is not XLPE... or am I overthinking it?  I have tried to asking a manufacturer but I have not had a clear answer.  


Looking forward to some answers.


Thanks,

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    As an aside if you are equipped to measure dielectric constant, you can say something about the fraction of the mineral loading - pure PP and PE have an Er of about 2.5,  while the oxides are about 10, so even though the filler is a few tens of percent, it has a significant effect. The loss  tangent also rises.
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    As an aside if you are equipped to measure dielectric constant, you can say something about the fraction of the mineral loading - pure PP and PE have an Er of about 2.5,  while the oxides are about 10, so even though the filler is a few tens of percent, it has a significant effect. The loss  tangent also rises.
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