Power or Communications Cable With Flame Retardant Polymer Layer

A power or communications cable or wire comprising a flame retardant layer made of a polymer composition comprising

• (A) an olefin homo- and/or copolymer,
• (B) a silicone-group containing compound, and
• (C) an inorganic filler,
• wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, the cable or wire further comprising at least one further layer.

Process for the production of a power or communications cable or wire comprising the extrusion of a polymer composition which comprises

• (A) an olefin homo- and/or copolymer,
• (B) a silicone-group containing compound, and
• (C) an inorganic filler,
• wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, as a flame retardant layer of the cable or wire, wherein the extrusion is performed at a line speed of at least of 20 m/min.

Method of producing a polymer composition comprising

• (A) an olefin homo- and/or copolymer,
• (B) a silicone-group containing compound, and
• (C) an inorganic filler,
• wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, for the production of a flame retardant layer of a power or communication cable or wire by extrusion, wherein the extrusion is performed at a line speed of at least of 20 m/min.